TEXAS INSTRUMENTS AM26LV32C handbook
Contents
1. CL includes probe and jig capacitance NOTES A B lt 2 ns 50 duty cycle C To test the active low enable G ground G and apply an inverted waveform G Figure 1 tp_y and tpy _ Test Circuit and Voltage Waveforms Y b Vo RL 2k9 p CL 15pF see Note A Generator Je cA see Note B 7 7 Vcc see Note C SS Vcc Input 50 50 ov gt tPHZ tpzH gt _ VOH Output 50 VoH 0 3 V Voff 0 NOTES A Cy includes probe and jig capacitance B The input pulse is supplied by a generator having the following characteristics Zo 50 Q PRR 10 MHz ty and tf 10 to 90 lt 2 ns 50 duty cycle C To test the active low enable G ground G and apply an inverted waveform G Figure 2 tpz and tpyz Test Circuit and Voltage Waveforms i TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 PARAMETER MEASUREMENT INFORMATION Vcc RL 2kQ o Vo CL 15 pF see Note A Generator al see Note B p Vcc see Note C Input 50 50 NOTES A Cy includes probe and jig capacitance B The input pulse is supplied by a generator having the following characteristics Zo 50 Q PRR 10 MHz tr and tf 10 to 90 lt 2 ns 50 duty cycle _ C To test the active low enable G ground G and apply an inverted waveform G2. Figure 3 tpz and tp z Test Circuit and Voltage Waveforms kiz TEXAS INSTRUMENTS 6 POST OFFICE BOX 655303 DALLAS TEXAS 75265 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 APPLICATION INFORMATION fail safe conditions The AM26LV32 quadruple differential line receiver is designed to function properly when appropriately connected to active drivers Applications do not always have ideal situations where all bits are being used the receiver inputs are never left floating and fault conditions don t exist In actuality most applications have the capability to either place the drivers in a high impedance mode or power down the drivers altogether and cables may be purposely or inadvertently disconnected both of which lead to floating receiver inputs Furthermore even though measures are taken to avoid fault conditions like a short between the differential signals this does occur The AM26LV32 has an internal fail safe circuitry which prevents the device from putting an unknown voltage signal at the receiver outputs In the following three cases a high state is produced at the respective output 1 Open fail safe Unused input pins are left open Do not tie unused pins to ground or any other voltage Internal circuitry places the output in the high state 2 100 ohm terminated fail safe Disconnected cables drivers in high impedance state or p
3. For example inspecting the top input threshold curve reveals that for a Vic 1 6 V Vip yields around 87 mV Applying 90 mV of differential voltage to this particular production lot generates a known receiver output voltage Applying a Vip of 80 mV activates the input fail safe circuitry and the receiver output is placed in the high state Texas Instruments specifies the input threshold at 200 mV since normal process variations affect this parameter Note that at common mode input voltages around 0 2 V the input differential voltages are low compared to their respective data points This phenomenon points to the fact that the inputs are very sensitive to small differential voltages around 0 2 V Vic It is recommended that Vic levels be kept greater than 0 5 V to avoid this increased sensitivity at Vig 0 2 V In most applications since Vic typically is 1 5 V the fail safe circuitry functions properly to provide a high state at the receiver output Most Applications A toners aS a Not Recommended i ee Pes 25 Vip Differential Voltage mV ol o creased Receiver Input Sensitivity 0 1 0 8 0 6 0 4 0 2 0 0 2 0 4 0 6 0 8 1 1 2 1 4 1 6 1 8 2 22 2 4 Vic Common Mode Input Voltage V Figure 8 Vic Versus Vip Receiver Sensitivity Levels Wy TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 9 AM26LV32C AM26LV32I LOW VO
4. ve TEXAS INSTRUMENTS www ti com NS R PDSO G 14 PINS SHOWN MECHANICAL DATA 0 25M Seating Plane 2 00 MAX PLASTIC SMALL OUTLINE PACKAGE 0 15 NOM P Gage Plane A 0 10 A NOTES A All linear dimensions are in millimeters B This drawing is subject to change without notice C Body dimensions do not include mold flash or protrusion not to exceed 0 15 4040062 C 03 03 wy TEXAS INSTRUMENTS www ti com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries Tl reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Tl s terms and conditions of sale supplied at the time of order acknowledgment Tl warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are used to the extent TI d
5. down it is recommended that for 1 2 or 3 active receiver inputs the low level input voltage Vi should be greater than 0 4 V As in all data transmission applications it is necessary to provide a return ground path between the two remote grounds driver and receiver ground references to avoid ground differences Table 1 and Figures 4 through 7 are examples of active input voltages with their respective waveforms and the effect each have on unused or inactive outputs Note that the active receivers behave as expected regardless of the input levels i TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 7 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 APPLICATION INFORMATION Table 1 Active Receiver Inputs vs Outputs 3 2 OR 1 UNUSED OUTPUTS a 1 2 OR3 ACTIVE INPUTS 2 ACTIVE ouTPUTS OR INACTIVE 1V Known state Known state Known state Known state t Measured with respect to ground Vip 200 mV ViL 900 mV Vic 1V ov Figure 4 Waveform One Vic 0V gt VIL 100 mV Vip 200 mV Figure 5 Waveform Two Vip 800 mV 5 Vic 1V VIL 600 mV IG OV Figure 6 Waveform Three Vip 800 mV OV Vic 400 mV Figure 7 Waveform Four ki TEXAS INSTRUMENTS 8 POST OFFICE BOX 655303 DALLAS TEXAS 75265 High state High state Produces a High State at Un
6. no Sb Br AM26LV32CDRG4 ACTIVE SOIC D 16 2500 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32CNSLE OBSOLETE SO NS 16 TBD Call TI Call TI AM26LV32CNSR ACTIVE SO NS 16 2000 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32CNSRE4 ACTIVE SO NS 16 2000 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32ID ACTIVE SOIC D 16 40 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32IDE4 ACTIVE SOIC D 16 40 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32IDR ACTIVE SOIC D 16 2500 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32IDRE4 ACTIVE SOIC D 16 2500 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32INS ACTIVE SO NS 16 50 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32INSE4 ACTIVE SO NS 16 50 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32INSR ACTIVE SO NS 16 2000 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32INSRE4 ACTIVE SO NS 16 2000 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br The marketing status values are defined as follows ACTIVE Product device recommended for new designs LIFEBUY TI has announced that the device will be discontinued and a lifetime buy period is in effect NRND Not recommended for new designs Device is in production to support existing customers but TI does not recommend using this part in a new design PREVIEW Device has been ann
7. AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 Switching Rates up to 32 MHz D OR NSt PACKAGE Operates From Single 3 3 V Supply TOPVIEW Ultra Low Power Dissipation 27 mW Typ Open Circuit Short Circuit and Terminated Fail Safe 0 3 V to 5 5 V Common Mode Range With 200 mV Sensitivity Accepts 5 V Logic Inputs With 3 3 V Vcc Input Hysteresis 50 mV Typ 235 mW With Four Receivers at 32 MHz Pin to Pin Compatible With AM26C32 AM26LS32 and MB570 description ordering information The AM26LV32 BiCMOS quadruple differential line receiver with 3 state outputs is designed to be similar to TIA EIA 422 B and ITU Recommendation V 11 receivers with reduced common mode voltage range due to reduced supply voltage The device is optimized for balanced bus transmission at switching rates up to 32 MHz The enable function is common to all four receivers and offers a choice of active high or active low inputs The 3 state outputs permit connection directly to a bus organized system Each device features receiver high input impedance and input hysteresis for increased noise immunity and input sensitivity of 200 mV over a common mode input voltage range from 0 3 V to 5 5 V When the inputs are open circuited the outputs are in the high logic state This device is designed using the Texas Instruments TI proprietary LinIMPACT C60 technology facilit
8. LTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 APPLICATION INFORMATION Figure 9 represents a typical application where two receivers are not used In this case there is no need to worry about the output voltages of the unused receivers since they are not connected in the system architecture AM26LV32 Connector J J Figure 9 Typical Application with Unused Receivers Figure 10 shows a common application where one or more drivers are either disabled or powered down To ensure the inactive receiver outputs are in a high state the active receiver inputs must have Vj gt 0 4 V and Vic gt 0 5 V Driver a T Connector Connector AM26LV32 Enable Disable or Power Off f System Figure 10 Typical Application Where Two or More Drivers are Disabled ki TEXAS INSTRUMENTS 10 POST OFFICE BOX 655303 DALLAS TEXAS 75265 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 APPLICATION INFORMATION Figure 11 is an alternative application design to replace the application in Figure 10 This design uses two AM26LV32 devices instead of one However this design does not require the input levels be monitored to ensure the outputs are in the correct state only that they comply to the RS 232 standard Driver eas T Connector Con
9. OST OFFICE BOX 655303 DALLAS TEXAS 75265 13 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 APPLICATION INFORMATION When designing a system using the AM26LV32 the device provides a robust solution where fail safe and fault conditions are of concern The RS 422 like inputs accept common mode input levels from 0 3 V to 5 5 V with a specified sensitivity of t 200mV As previously shown care must be taken with active input levels since they can affect the outputs of unused or inactive bits However most applications meet or exceed the requirements to allow the device to perform properly kiz TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 K Texas PACKAGE OPTION ADDENDUM INSTRUMENTS www ti com 5 Dec 2005 PACKAGING INFORMATION Orderable Device Status Package Package Pins Package Eco Plan Lead Ball Finish MSL Peak Temp Type Drawing Qty AM26LV32CD ACTIVE SOIC D 16 40 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32CDE4 ACTIVE SOIC D 16 40 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32CDG4 ACTIVE SOIC D 16 40 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32CDR ACTIVE SOIC D 16 2500 Green RoHS amp CU NIPDAU Level 1 260C UNLIM no Sb Br AM26LV32CDRE4 ACTIVE SOIC D 16 2500 Green RoHS amp CU NIPDAU Level 1 260C UNLIM
10. REVISED JUNE 2005 FUNCTION TABLE each receiver ENABLES Brea ee xD xX XL oxox Trx Open shorted or terminatedt X H H high level L low level X irrelevant Z high impedance off indeterminate T See application information attached x I m x rc logic symbol logic diagram positive logic This symbol is in accordance with ANSI IEEE Std 91 1984 and IEC Publication 617 12 aa 14 13 4y 4B 15 ki TEXAS INSTRUMENTS 2 POST OFFICE BOX 655303 DALLAS TEXAS 75265 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 schematics of equivalent inputs and outputs EQUIVALENT OF EACH INPUT A B EQUIVALENT OF EACH TYPICAL OF ALL OUTPUTS Y ENABLE INPUT G G Vcc Voc absolute maximum ratings over operating free air temperature range unless otherwise noted t Supply voltage range Vcc see Note 1 eee eee ees 0 3Vto6V Input voltage range Vj A or B inputs 0 eect eet 4Vto8V Differential input voltage Vip see Note 2 6 eect aaa H2V Enable input voltage range 0c cee nents 0 3Vto6V Output voltage range VQ sect eee eee eee nee cease ease Rage ERDA nian Ri 0 3Vto6V Maximum output Current O isceces5 ce est ee
11. ating ultra low power consumption without sacrificing speed This device offers optimum performance when used with the AM26LV31 quadruple line drivers The AM26LV32C is characterized for operation from 0 C to 70 C The AM26LV32I is characterized for operation from 45 C to 85 C ORDERING INFORMATION ORDERABLE TOP SIDE packacet PART NUMBER MARKING eoat rt Tape and reel AM26LV32CDR AM26LV32C 0 C to 70 C ee an s E and reel AM26LV32CNSR epunee AM26LV32ID SOP D Tube AM26LV321 FAM26LV32IDR 40 C to 85 C ence o SOP NS 26LV321 Tape and reel AM26LV32INSR Tt Package drawings standard packing quantities thermal data symbolization and PCB design guidelines are available at www ti com sc package Please be aware that an important notice concerning availability standard warranty and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet LinIMPACT C60 and TI are trademarks of Texas Instruments PRODUCTION DATA information is current as of publication date Products conform to specifications per the terms of Texas Instruments cenafan Production processing does not necessarily include Ai TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 1 Copyright 2005 Texas Instruments Incorporated AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995
12. deta etta eet aaeeap aren eae Read ee oe bee eee Oe 25 mA Package thermal impedance j see Note 3 D package 2 e eee eee 73 C W NS package saias danaa eaea deen 64 C W Lead temperature 1 6 mm 1 16 inch from case for 10 seconds 00 cece eee ee eee 260 C Storage temperature range Tstg center sivseeteiaerdciensineusreledaeneennde ans 65 C to 150 C T Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied Exposure to absolute maximum rated conditions for extended periods may affect device reliability NOTES 1 Allvoltage values are with respect to the GND terminal 2 Differential input voltage is measured at the noninverting input with respect to the corresponding inverting input 3 The package thermal impedance is calculated in accordance with JESD 51 recommended operating conditions D O Lowievelinputvotage Wue o o o o ooo Differential input voltage VID 0 Operating free air temperature TA AMD6LV32I 0 35 K TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 3 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 electrical characteristics over recommended su
13. ed documentation Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice TI is not responsible or liable for any such statements Following are URLs where you can obtain information on other Texas Instruments products and application solutions Products Applications Amplifiers amplifier ti com Audio www ti com audio Data Converters dataconverter ti com Automotive www ti com automotive DSP dsp ti com Broadband www ti com broadband Interface interface ti com Digital Control www ti com digitalcontrol Logic logic ti com Military www ti com military Power Mgmt power ti com Optical Networking www ti com opticalnetwork Microcontrollers microcontroller ti com Security www ti com security Telephony www ti com telephony Video amp Imaging www ti com video Wireless www ti com wireless Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2005 Texas Instruments Incorporated
14. eems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed TI assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using TI components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeguards TI does not warrant or represent that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties conditions limitations and notices Reproduction of this information with alteration is an unfair and deceptive business practice TI is not responsible or liable for such alter
15. kes no representation or warranty as to the accuracy of such information Efforts are underway to better integrate information from third parties TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals TI and TI suppliers consider certain information to be proprietary and thus CAS numbers and other limited information may not be available for release In no event shall TI s liability arising out of such information exceed the total purchase price of the TI part s at issue in this document sold by TI to Customer on an annual basis Addendum Page 2 MECHANICAL DATA D R PDSO G16 PLASTIC SMALL OUTLINE PACKAGE 0 394 10 00 0 386 9 80 NV 8 Pin 1 Index Area 0 050 1 27 0 020 0 51 0 012 0 31 0 010 0 25 L 0 069 1 75 Max 7 0 004 0 10 Gauge Plane x Seating Plane 0 010 0 25 4040047 4 F 07 2004 NOTES All linear dimensions are in inches millimeters This drawing is subject to change without notice Body dimensions do not include mold flash or protrusion not to exceed 0 006 0 15 Falls within JEDEC MS 012 variation AC
16. nector AM26LV32 Enable Disable or Power Off Figure 11 Alternative Solution for Figure 10 vy TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS TEXAS 75265 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 APPLICATION INFORMATION Figures 12 and 13 show typical applications where a disconnected cable occurs Figure 12 illustrates a typical application where a cable is disconnected Similar to Figure 10 the active input levels must be monitored to make sure the inactive receiver outputs are in a high state An alternative solution is shown in Figure 13 Driver So T Connector Connector AM26LV32 Unplugged Cable Figure 12 Typical Application Where Two or More Drivers are Disconnected kiz TEXAS INSTRUMENTS 12 POST OFFICE BOX 655303 DALLAS TEXAS 75265 AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 APPLICATION INFORMATION Figure 13 is an alternative solution so the receiver inputs do not have to be monitored This solution also requires the use of two AM26LV32 devices instead of one Driver i Bnn q1 Connector Connector AM26LV32 Unplugged Cable Figure 13 Alternative Solution to Figure 12 i TEXAS INSTRUMENTS P
17. ounced but is not in production Samples may or may not be available OBSOLETE TI has discontinued the production of the device 9 Eco Plan The planned eco friendly classification Pb Free ROHS or Green RoHS amp no Sb Br please check http Awww ti com productcontent for the latest availability information and additional product content details TBD The Pb Free Green conversion plan has not been defined Pb Free RoHS TI s terms Lead Free or Pb Free mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances including the requirement that lead not exceed 0 1 by weight in homogeneous materials Where designed to be soldered at high temperatures TI Pb Free products are suitable for use in specified lead free processes Green RoHS amp no Sb Br TI defines Green to mean Pb Free ROHS compatible and free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed 0 1 by weight in homogeneous material 3 MSL Peak Temp The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications and peak solder Addendum Page 1 K Texas PACKAGE OPTION ADDENDUM INSTRUMENTS www ti com 5 Dec 2005 temperature Important Information and Disclaimer The information provided on this page represents TI s knowledge and belief as of the date that it is provided TI bases its knowledge and belief on information provided by third parties and ma
18. owered down drivers will not cause the AM26LV32 to malfunction The outputs will remain in a high state under these conditions When the drivers are either turned off or placed into the high impedance state the receiver input may still be able to pick up noise due to the cable acting as an antenna To avoid having a large differential voltage being generated the use of twisted pair cable will induce the noise as a common mode signal and will be rejected 3 Shorted fail safe Fault conditions that short the differential input pairs together will not cause incorrect data at the outputs A differential voltage Vip of 0 V will force a high state at the outputs Shorted fail safe however is not supported across the recommended common mode input voltage Vic range An unwanted state can be induced to all outputs when an input is shorted and is biased with a voltage between 0 3 V and 5 5 V The shorted fail safe circuitry will function properly when an input is shorted but with no external common mode voltage applied fail safe precautions The internal fail safe circuitry was designed such that the input common mode Vic and differential Vip voltages must be observed In order to ensure the outputs of unused or inactive receivers remain in a high state when the inputs are open circuited shorted or terminated extra precaution must be taken on the active signal In applications where the drivers are placed in a high impedance mode or are powered
19. pply voltage and operating free air temperature ranges unless otherwise noted PARAMETER UNIT u u k u m p n Vit Differential input high threshold voltage Vj 5 5V Vj 0V T All typical values are at Vcc 3 3 V and Ta 25 C Cpq determines the no load dynamic current Ig Cog x Voc xf ICC switching characteristics Vcc 3 3 V Ta 25 C 0 2 j 1 5 2 0 5 50 10 12 8 17 50 P 5 17 40 10 40 0 40 16 40 4 6 4 6 tPHZ Output disable time from high level See Figure 2 tPLZ Output disable time from low level See Figure 3 tsk p 8 Pulse skew tsk pp Pulse skew device to device tsk p S ItPLH tPHLI of each channel of the same device fTtsk o is the maximum difference in propagation delay times between any two channels of the same device switching in the same direction tsk pp is the maximum difference in propagation delay times between any two channels of any two devices switching in the same direction ki TEXAS INSTRUMENTS 4 POST OFFICE BOX 655303 DALLAS TEXAS 75265 AM26LV32C AM26LV32I SLLS202E MAY 1995 REVISED JUNE 2005 LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER PARAMETER MEASUREMENT INFORMATION Vo CL 15 pF see Note A Generator see Note B Output G G gt see Note C The input pulse is supplied by a generator having the following characteristics Zo 50 Q PRR 10 MHz tp and tf 10 to 90
20. used or Inactive Outputs An Unknown State is Produced at Unused or Inactive Outputs Produces a High State at Unused or Inactive Outputs An Unknown State is Produced at Unused or Inactive Outputs AM26LV32C AM26LV32I LOW VOLTAGE HIGH SPEED QUADRUPLE DIFFERENTIAL LINE RECEIVER SLLS202E MAY 1995 REVISED JUNE 2005 APPLICATION INFORMATION In most applications it is not customary to have a common mode input close to ground and to have a differential voltage larger than 2 V Since the common mode input voltage is typically around 1 5 V a 2 V Vip would result in a Vj of 0 5 V thus satisfying the recommended Vj level of greater than 0 4 V Figure 8 plots seven different input threshold curves from a variety of production lots and shows how the fail safe circuitry behaves with the input common mode voltage levels These input threshold curves are representative samples of production devices The curves specifically illustrate a typical range of input threshold variation The AM26LV32 is specified with 200 mV of input sensitivity to account for the variance in input threshold Each data point represents the input s ability to produce a known state at the output for a given Vic and Vip Applying a differential voltage at or above a certain point on a curve would produce a known state at the output Applying a differential voltage less than a certain point on a curve would activate the fail safe circuit and the output would be in a high state
Download Pdf Manuals
Related Search
TEXAS INSTRUMENTS AM26LV32C handbook