intersil ICL3207E Manual
Contents
1. TEMP PARAMETER TEST CONDITIONS C MIN TYP MAX UNITS DC CHARACTERISTICS Supply Current Automatic All Open ICL3217E Only 25 1 0 10 Powerdown Supply Current All Outputs Unloaded 0 3 1 0 mA Automatic Powerdown Disabled C nt ersi Input Logic Threshold Low ll 0 8 Input Logic Threshold High TIN Voc 3 3V Full 2 0 B V Voc 5 0V Full 24 V Input Leakage Current TIN Full 0 01 1 0 uA Output Leakage Current Full 0 05 10 uA ICL3217E Only Output Voltage Low lout 1 6mA Full E 0 4 V Output Voltage High lout 1 0mA Full Vcc 0 6 Vcc 0 1 V AUTOMATIC POWERDOWN ICL3217E Only Receiver Input Thresholds to ICL3217E Powers Up Figure 4 Full 2 7 2 7 V Enable Transmitters Receiver Input Thresholds to ICL3217E Powers Down Figure 4 Full 0 3 0 3 V Disable Transmitters Receiver Threshold to 25 E 100 us Transmitters Enabled Delay twy Receiver Positive or Negative 25 30 us Threshold to Transmitters Disabled Delay RECEIVER INPUTS Input Voltage Range Full 25 25 V Input Threshold Low Voc 3 3V 25 0 6 1 2 V Voc 5 0V 25 0 8 1 5 V Input Threshold High Voc 3 3V 25 1 5 2 4 Voc 5 0V 25 1 8 2 4 4 intersil ICL3207E 3217 Electrical Specifications Test Conditions Voc to 5 5V 0 1uF Unless Otherwise Specified Typicals are at TA 252. Detailed Description The ICL32X7E interface ICs operate from a single 3V to 5 5V power supply guarantee a 250kbps minimum data rate require only four small external 0 1uF capacitors feature low power consumption and meet all EIA RS 232C and V 28 specifications The circuit is divided into three sections charge pump transmitters and receivers Charge Pump Intersil s new ICL32XXE family utilizes regulated on chip dual charge pumps as voltage doublers and voltage inverters to generate 5 5V transmitter supplies from a Voc supply as low as 3V This allows these devices to maintain RS 232 compliant output levels over the 10 tolerance range of 3 3V powered systems The efficient on chip power supplies require only four small external 0 1uF capacitors for the voltage doubler and inverter functions at Voc 3 3V See the Capacitor Selection section and Table 3 for capacitor recommendations for other operating conditions The charge pumps operate discontinuously i e they turn off as soon as the V and V supplies are pumped up to the nominal values resulting in significant power savings Transmitters The transmitters are proprietary low dropout inverting drivers that translate TTL CMOS inputs to EIA TIA 232 output levels Coupled with the on chip 5 5V supplies these transmitters deliver true RS 232 levels over a wide range of single supply system voltages ICL3217E transmitter outputs disable and assume a high
3. INCHES MILLIMETERS SYMBOL MIN MAX MIN MAX NOTES A 0 078 2 00 1 0 002 0 05 A2 0 065 0 072 1 65 1 85 B 0 009 0 014 0 22 0 38 9 C 0 004 0 009 0 09 0 25 0 312 0 334 7 90 8 50 0 197 0 220 5 00 5 60 0 026 BSC 0 65 BSC 0 292 0 322 7 40 8 20 L 0 022 0 037 0 55 0 95 6 N 24 T a 09 89 09 89 g Rev 1 3 95 11 intersil ICL3207E 3217 Small Outline Plastic Packages SOIC M24 3 JEDEC MS 013 AD ISSUE C 24 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE INCHES MILLIMETERS SYMBOL MIN MAX MIN MAX NOTES A 00926 0 1043 235 265 A1 0 0040 0 0118 0 10 0 30 B 0 013 0 020 0 33 0 51 9 SEATING PLANE C 0 0091 0 0125 0 23 0 32 D 0 5985 0 6141 15 20 15 60 3 E 0 2014 0 2992 7 40 7 60 4 e 0 05 BSC 1 27 BSC H 0 394 0 419 10 00 10 65 h 0 0010 0 029 0 25 0 75 5 L 0 016 0 050 0 40 1 27 6 N 24 24 7 NOTES 09 89 09 89 1 Symbols are defined in the MO Series Symbol List in Section 2 2 of Rev 0 12 93 Publication Number 95 2 Dimensioning and tolerancing per ANSI Y14 5M 1982 3 Dimension D does not include mold flash protrusions or gate burrs Mold flash protrusion and gate burrs shall not exceed 0 15mm 0 006 inch per side 4 Dimension E does not include interlead flash or protrusions Inter lead flash and protrusions shall no 0 inch per e
4. Continued PARAMETER TEST CONDITIONS po MIN TYP MAX UNITS Input Hysteresis 25 0 3 V Input Resistance 25 3 5 7 kQ TRANSMITTER OUTPUTS Output Voltage Swing All Transmitter Outputs Loaded with 3kQ to Ground Full 5 0 5 4 V Output Resistance Voc V V OV Transmitter Output 2V Full 300 10M Output Short Circuit Current Full 35 60 mA Output Leakage Current Vout 12V Voc OV or to 5 5V Full 25 uA ICL3217E Only In Automatic Powerdown TIMING CHARACTERISTICS Maximum Data Rate Voc 3 15V C4 O 1pF RL 1000pF Full 250 500 kbps One Transmitter Switching Voc 3 0V 0 22 1000pF Ful 250 286 kbps Voc 2 4 5V C4 O 1uF 1000pF Full 250 310 kbps Receiver Propagation Delay Receiver Input to Receiver tPHL 25 0 3 us Output C 150pF a 25 _ 0 3 is Transmitter Skew tPHL Full 200 1000 ns Receiver Skew tPHL Full 100 500 ns Transition Region Slew Rate Vec 3 3V to 7kO C 200pF to 2500pF 25 4 15 30 V us Measured From 43V to 53 or SV o 200pF to 1000 25 6 15 30 Vins ESD PERFORMANCE RS 232 Pins TOYA IE ed 5 Tm kV 1000 4 2 Contact Discharge 8 kV Human Body Model 25 15 kV All Other Pins Human Body Model 25 2
5. V tO POPE Output Voltages TOUT cxi rte os ROUT rc Eee TOUT Ereren ate 0 3V to 6V 0 3V to 7V 0 3V to 7V 14V 0 3V to 6V anand ayes 25V 13 2V 0 3V to Vcc 0 3V TEPORE Continuous See Specification Table Thermal Information Thermal Resistance Typical Note 3 Oya W 24 Ld SOIC 75 24 Ld SSOP Package 100 Maximum Junction Temperature Plastic Package 150 C Maximum Storage Temperature Range 65 C to 150 C Maximum Lead Temperature Soldering 105 300 C Lead Tips Only Operating Conditions Temperature Range ISL BAX ECK EP 0 C to 70 C 2 cand as bra cea ag ARATRI 40 C to 85 C CAUTION Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied NOTE 3 0jA is measured with the component mounted on a low effective thermal conductivity test board in free air See Tech Brief TB379 for details Electrical Specifications Test Conditions Vcc to 5 5V C4 C4 0 1uF Unless Otherwise Specified Typicals are at TA 25 C
6. plate termination finish which is Pb free solder classified at exceed the Pb free requirements of IPC JEDEC J Std 020B 15 a th S nd 5 fre MSL yes me Pin Descriptions PIN FUNCTION System power supply input 3 0V to 5 5V Internally generated positive transmitter supply 5 5V Internally generated negative transmitter supply 5 5V Ground connection External capacitor voltage doubler is connected to this lead External capacitor voltage doubler is connected to this lead External capacitor voltage inverter is connected to this lead External capacitor voltage inverter is connected to this lead TTL CMOS compatible transmitter inputs 15kV ESD Protected RS 232 level nominally 5 5V transmitter outputs RIN 15kV ESD Protected RS 232 compatible receiver inputs Rout TTL CMOS level receiver outputs ntersi 2 intersil ICL3207E 3217 Typical Operating Circuit ICL32X7E C3 OPTIONAL CONNECTION 95 9 RS 232 LEVELS TTL CMOS LOGIC LEVELS T5IN R2in RS 232 LEVELS R3in ntersi 3 intersil ICL3207E 3217 Absolute Maximum Ratings Voc to Ground V to V to Ground
7. PART NUMBER TX RX kbps FUNCTION DOWN FUNCTION ICL3207E 5 3 0 250 NO NO NO ICL3217E 5 3 0 250 NO NO YES 1 CAUTION These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures 1 888 INTERSIL or 321 724 7143 Intersil and design is a registered trademark of Intersil Americas Inc Copyright Intersil Americas Inc 2000 2001 2004 All Rights Reserved All other trademarks mentioned are the property of their respective owners ICL3207E 3217 Ordering Information NOTE 1 TEMP PKG PART NO RANGE PACKAGE DWG ICL3207ECA 0 to 70 24 Ld SSOP M24 209 ICL3207ECAZ 0 to 70 24 Ld SSOP Pb Free M24 209 See Note 2 ICL3207ECB 0 to 70 24 Ld SOIC M24 3 ICL3207ECBZ 0 to 70 24 Ld SOIC Pb Free M24 3 See Note 2 ICL3217ECA 0 to 70 24 Ld SSOP M24 209 ICL3217ECAZ 0 to 70 24 Ld SSOP Pb Free M24 209 See Note 2 ICL3217ECB 0 to 70 24 Ld SOIC M24 3 ICL3217ECBZ 0 to 70 24 Ld SOIC Pb Free M24 3 See Note 2 ICL3217EIA 40 to 85 24 Ld SSOP M24 209 ICL3217EIAZ 40 to 85 24 Ld SSOP Pb Free M24 209 See Note 2 ICL3217EIB 40 to 85 24 Ld SOIC M24 3 ICL3217EIBZ 40 to 85 24 Ld SOIC Pb Free M24 3 See Note 2 NOTES 1 Most surface mount devices are available on tape and reel add to suffix 2 Intersil Pb free products employ special Pb free material sets molding compounds die attach materials and 10096 matte tin
8. allowing users to reduce system power simply by replacing the old style device with the ICL3207E Low Power Pin Compatible Replacement Pin compatibility with existing 5V products e g MAX207E coupled with the wide operating supply range make the ICL32X7E potential lower power higher replacements for existing 2X7E as the 45V PS 2XAMAMADES 4 ICL32X7E devices IG in med Vcc RyiN Rxour 25V lt VRIN lt 25V GND lt Vrout lt Vcc GND FIGURE 1 INVERTING RECEIVER CONNECTIONS Vour Vcc POWERED DOWN UART RS 232 CHIP FIGURE 2 POWER DRAIN THROUGH POWERED DOWN PERIPHERAL ICL3217E Vout HI Z IN AUTOMATIC POWERDOWN FIGURE 3 DISABLED RECEIVERS PREVENT POWER DRAIN When replacing 207E or 237E device in an existing 5V application it is acceptable to terminate to Vcc as shown on the Typical Operating Circuit Nevertheless terminate to GND if possible as slightly better performance results from this configuration Automatic Powerdown ICL3217E Only Even greater power savings is available by using the which features an automatic pbwerdown function fe table J re 4 are sensed li receiver 7E automatically enters its powerdown state see Figure 5 In powerdown supply current drops to 1A because the on chip charge pump turns off V collapses to Vcc V collapses to GND and the r
9. impedance state when the device enters the automatic powerdown mode These outputs may be driven to 12V when disabled Both devices guarantee a 250kbps data rate for full load conditions and 1000pF Vcc gt 3 0V with one transmitter operating at full speed Under more typical conditions of Voc gt 3 3V C 250pF one transmitter easily operates at 800kbps Transmitter inputs float if left unconnected and may cause increases Connect unused inputs to GND for the best performance 5 intersil ICL3207E 3217 Receivers The ICL32X7E each contain inverting receivers that convert RS 232 signals to CMOS output levels and accept inputs up to 25V while presenting the required to 7k input impedance see Figure 1 even if the power is off Vcc 0 The receivers Schmitt trigger input stage uses hysteresis to increase noise immunity and decrease errors due to slow input signal transitions Receivers on the ICL3207E are always active The ICL3217E receivers disable when in the automatic powerdown state thereby eliminating the possible current path through a shutdown peripheral s input protection diode see Figures 2 and 3 Low Power Operation These 3V devices require a nominal supply current of 0 3mA even at Vcc 5 5V during normal operation not powerdown mode This is considerably less than the 11mA current required by comparable 5V RS 232 devices
10. 7E 3217 Operation down to 2 7 ICL32X7E transmitter outputs meet RS 562 levels 3 7V with Vcc as low as 2 7V RS 562 levels typically ensure inter operability with RS 232 devices High Data Rates The ICL32XX maintain the RS 232 5V minimum transmitter output voltages even at high data rates Figure 7 details a transmitter loopback test circuit and Figure 8 illustrates the loopback test result at 120kbps For this test all transmitters were simultaneously driving RS 232 loads in parallel with 1000pF at 120kbps Figure 9 shows the loopback results for a single transmitter driving 1000pF and an RS 232 load at 250kbps The static transmitters were also loaded with an RS 232 receiver ICL32X7E FIGURE 7 TRANSMITTER LOOPBACK TEST CIRCUIT 5VIDIV Tiour Riour T 71 Vcc 3 3 C1 C4 O 1uF 5us DIV FIGURE 8 LOOPBACK TEST AT 120kbps 5V DIV Tiour Riour TL Lr Vcc 3 3V C1 C4 0 2us DIV FIGURE 9 LOOPBACK TEST AT 250kbps Interconnection with 3V and 5V Logic The ICL32X7E directly interface with 5V CMOS and TTL logic families Nevertheless with the ICL32X7E at 3 3V and the logic supply at 5V AC HC and CD4000 outputs can drive ICL32X7E inputs but ICL32X7E outputs do not reach the minimum for the
11. ISTOR COUNT ICL3207E 469 ICL3217E 488 Si Gate CMOS 5000 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 SUPPLY VOLTAGE V FIGURE 13 SUPPLY CURRENT vs SUPPLY VOLTAGE BDTI C ntersi 10 intersil ICL3207E 3217 Shrink Small Outline Plastic Packages SSOP NOTES 10 Symbols are defined the Series Symbol List in Section 2 2 of Publication Number 95 Dimensioning and tolerancing per ANSI Y14 5M 1982 Dimension D does not include mold flash protrusions or gate burrs Mold flash protrusion and gate burrs shall not exceed 0 20mm 0 0078 inch per side Dimension E does not include intere rotrusions Inter lead flash and gr i 0 0078 inch The chamfer the body is optional If it is not present visual index feature must be located within the crosshatched area L is the length of terminal for soldering to a substrate is the number of terminal positions Terminal numbers are shown for reference only Dimension B does not include dambar protrusion Allowable dambar protrusion shall be 0 13mm 0 005 inch total in excess of B dimen sion at maximum material condition Controlling dimension MILLIMETER Converted inch dimensions are not necessarily exact M24 209 JEDEC MO 150 AG ISSUE B 24 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE
12. Tie nter si 5 The chamfer o espent 24 in feature must be located within the crosshatched area L is the length of terminal for soldering to a substrate N is the number of terminal positions Terminal numbers are shown for reference only The lead width as measured 0 36mm 0 014 inch or greater above the seating plane shall not exceed a maximum value of 0 61mm 0 024 inch 10 Controlling dimension MILLIMETER Converted inch dimensions are not necessarily exact All Intersil semiconductor products are manufactured assembled and tested under 1509000 quality systems certification Intersil semiconductor products are sold by description only Intersil Corporation reserves the right to make changes in circuit design and or specifications at any time with out notice Accordingly the reader is cautioned to verify that data sheets are current before placing orders Information furnished by Intersil is believed to be accurate and reliable However no responsibility is assumed by Intersil or its subsidiaries for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries For information regarding Intersil Corporation and its products see web site www intersil com 12 intersil
13. cs to it The current waveform delivered to the IC pin depends on approach speed humidity temperature etc so it is difficult to obtain repeatable results The E device RS 232 pins withstand 15kV air gap discharges CONTACT DISCHARGE TEST METHOD During the contact discharge test the probe contacts the tested pin before the probe tip is energized thereby eliminating the variables associated with the air gap discharge The result is a more repeatable and predictable test but equipment limits prevent testing devices at voltages higher than 8kV All E family devices survive 8kV contact discharges on the RS 232 pins 25 SLEW SLEW 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE pF FIGURE 11 SLEW RATE vs LOAD CAPACITANCE 9 intersil ICL3207E 3217 Typical Performance Curves voc 3 3V TA 25 Continued 55 50 1 TRANSMITTER SWITCHING 3 5 NO LOAD ALL OUTPUTS STATIC 45 40 3 0 250kbps 2 5 35 2 0 30 120kbps 1 5 25 SUPPLY CURRENT mA 20 20kbps 1 0 SUPPLY CURRENT mA 15 0 5 0 FIGURE 12 SUPPLY CURRENT vs LOAD CAPACITANCE 1000 2000 3000 4000 LOAD CAPACITANCE pF WHEN TRANSMITTING DATA Die Characteristics SUBSTRATE POTENTIAL POWERED UP GND TRANS
14. eceiver and transmitter outputs three state see Table 2 This micro power mode makes the ICL3217E ideal for battery powered and portable applications Invalid receiver levels occur whenever the driving 5 outputs are shut off powered down or when the RS 232 interface cable is disconnected The ICL3217E powers back up whenever it detects a valid RS 232 voltage level on any receiver input such as when the RS 232 cable is reconnected The time to recover from automatic powerdown mode is typically 100 5 TABLE 2 ICL3217E AUTOMATIC POWERDOWN OPERATION RS 232 SIGNAL PRESENT AT MODE RECEIVER TRANSMITTER RECEIVER OF INPUT OUTPUTS OUTPUTS OPERATION YES Active Active Normal Operation NO High Z High Z Powerdown Due to Auto Powerdown Logic 6 intersil ICL3207E 3217 VALID RS 232 LEVEL 3217 IS ACTIVE 2 7V INDETERMINATE POWERDOWN MAY OR MAY NOT OCCUR 0 3V INVALID LEVEL POWERDOWN OCCURS AFTER 30 5 0 3V INDETERMINATE POWERDOWN MAY OR MAY NOT OCCUR 2 7V VALID RS 232 LEVEL ICL3217E IS ACTIVE FIGURE 4 DEFINITION OF VALID RS 232 RECEIVER LEVELS RECEIVER 7 INVALID INPUTS _ REGION 1 1 TRANSMITTER ME OUTPUTS T lt PWR UP twu oo y This automatic powerdown feature provides additional System power savings without changes to the existing operating system or hardware G Utilizing p
15. intersil Data Sheet 15kV ESD Protected 3V to 5 5V Low Power 250kbps RS 232 Transmitters Receivers The Intersil ICL32X7E devices are to 5 5V powered RS 232 transmitters five receivers three which meet EIA TIA 232 and V 28 V 24 specifications even at Vcc 3 0V Additionally they provide 15kV ESD protection IEC61000 4 2 Air Gap and 15kV Human Body Model protection on transmitter outputs and receiver inputs RS 232 pins Targeted applications are ISDN Terminal Adaptors PDAs Palmtops peripherals and notebook and laptop computers where the low operational and even lower standby power consumption is critical The ICL3217E s efficient on chip charge pumps coupled with an automatic powerdown function reduces the standby supply current to a trickle Small footprint packaging and the use of small low value capacitors ensure board space savings as well Data rates greater than 250kbps are guaranteed at worst case load conditions This family is fully compatible with 3 3V only systems mixed 3 3V and 5V systems and 5V only systems and is a lower power pin for pin replacement for 207E and 237E type devices ICL3207E ICL3217E FN4914 5 June 2004 Features Pb Free Available as an Option see Ordering Info ESD Protection for RS 232 I O Pins to 15kV IEC61000 5V Lower Power Replacement for MAX207E HIN207E HIN237E Meets EIA TIA 232 and V 28 V 24 Specifications at La
16. itor values make sure that capacitor values do not degrade excessively with temperature If in doubt use capacitors with a larger nominal value The capacitor s equivalent series resistance ESR usually rises at low temperatures and it influences the amount of ripple on V and V TABLE 3 REQUIRED CAPACITOR VALUES V Cy uF C2 C4 uF 3 15 to 3 6 0 1 0 1 3 0 to 3 6 0 22 0 22 4 5 to 5 5 0 1100 1 0 0 1 to 1 0 3 0 to 5 5 0 22 0 22 Power Supply Decoupling In most circumstances a 0 1uF bypass capacitor is adequate In applications that are particularly sensitive to power supply noise decouple Vcc to ground with capacitor of the same value as the charge pump capacitor C4 Connegt I bypass capacitor as close ag possible to the IC CODL LLL Sch dus Powerdown Figure 6 shows the response of two ICL3217E transmitter outputs when exiting powerdown mode As they activate the two transmitter outputs properly go to opposite RS 232 levels with no glitching ringing nor undesirable transients Each transmitter is loaded with 3kO in parallel with 2500pF Note that the transmitters enable only when the magnitude of the supplies exceed approximately 3V 5V DIV RXiN Ti 2V DIV T2 Vec 3 3V C1 C4 0 1uF TIME 20us DIV FIGURE 6 TRANSMITTER OUTPUTS WHEN EXITING POWERDOWN ICL3217E ONLY 7 intersil ICL320
17. ower management circuitry to power down the rest of the communication circuitry e g the UART when the ICL3217E powers down produces even greater power savings Connecting a transition detector to the V pin see Figure 3 is an easy way for the power management logic to determine when the ICL3217E enters and exits powerdown Capacitor Selection The charge pumps require 0 1uF or greater capacitors for 3 3V operation With 0 1uF capacitors five percent tolerance supplies e g 3 14V minimum deliver greater than 5V transmitter swings at full data rate while ten percent tolerance supplies e g 2 97V minimum deliver 4 95V transmitter swings If greater than 5V transmitter swings are required with a 10 tolerance 3 3V supply 0 22uF capacitors are recommended see Table 3 Existing 5V applications typically utilize either 0 1uF or 1uF capacitors and the ICL32X7E works well with either value New 5V designs should use 0 22uF capacitors for the best results For other supply voltages refer to Table 3 for capacitor values Do not use values smaller than those listed in Table 3 Increasing the capacitor values by a factor of two reduces ripple on the transmitter outputs and slightly reduces power consumption Co C3 and C4 can be increased without increasing C4 s value however do not increase C4 without also increasing Co and C4 to maintain the proper ratios C4 to the other capacitors When using minimum required capac
18. r The HBM method determines an ICs ability to withstand the ESD transients typically present during handling and manufacturing Due to the random nature of these events each pin is tested with respect to all other pins The RS 232 pins on E family devices can withstand HBM ESD events to 15kV IEC61000 4 2 Testing The IEC61000 test method applies to finished equipment rather than to an individual IC Therefore the pins most likely to suffer an ESD event are those that are exposed to the outside world the RS 232 pins in this case and the IC is tested in its typical application configuration power applied rather than testing each pin to pin combination The lower current limiting resistor coupled with the larger charge storage capacitor yields a test that is much more severe than Typical Performance Curves 3 3V 25 C 6 0 Vour 4 0 TRANSMITTER OUTPUT VOLTAGE V o 2 0 4 0 Vour 6 0 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE pF FIGURE 10 TRANSMITTER OUTPUT VOLTAGE vs LOAD CAPACITANCE 20 com the HBM test The extra ESD protection built into this device s RS 232 pins allows the design of equipment meeting level 4 criteria without the need for additional board level protection on the RS 232 port AIR GAP DISCHARGE TEST METHOD For this test method a charged probe tip moves toward the IC pin until the voltage ar
19. se logic families See Table 4 for more information TABLE 4 LOGIC FAMILY COMPATIBILITY WITH VARIOUS SUPPLY VOLTAGES LTAGE VOLTAGE COMPATIBILITY 3 3 3 3 Compatible with all CMOS families 5 5 Compatible with all TTL and CMOS logic families 5 3 3 Compatible with ACT and HCT CMOS and with TTL ICL32X7E outputs are incompatible with AC HC and CD4000 CMOS inputs 15kV ESD Protection All pins on ICL32XX devices include ESD protection structures but the ICL32X7E incorporate advanced structures which allow the RS 232 pins transmitter outputs and receiver inputs to survive ESD events up to 15kV The RS 232 pins are particularly vulnerable to ESD damage because they typically connect to an exposed port on the exterior of the finished product Simply touching the port pins or connecting a cable can cause an ESD event that might destroy unprotected ICs These new ESD structures protect the device whether or not it is powered up protect without allowing any latchup mechanism to activate and don t interfere with RS 232 signals as large as 25V 8 intersil ICL3207E 3217 Human Body Model HBM Testing As the name implies this test method emulates the ESD event delivered to an IC during human handling The tester delivers the charge through a 1 5kQ current limiting resistor making the test less severe than the IEC61000 test which utilizes a 330 limiting resisto
20. tch Up Free On Chip Voltage Converters Require Only Four External 0 1uF Capacitors e RS 232 Compatible with Vcc 2 7V Automatic Powerdown Icc ICL3217E Only Receiver Hysteresis For Improved Noise Immunity Guaranteed Minimum Data Rate 250kbps e Guaranteed Minimum Slew 6V us Wide Power Supply Range Single 3V to 5 5V Applications Battery Powered Hand Held and Portable Equipment Laptop Computers Notebooks Palmtops Modems Printers and other Peripherals ISDN Terminal Adaptors and Set Boxes The ICL3217E f ction S which powers do yf dri icalB Guie lifes fer Handling and circuits This occurs qus an peripheral device is shut off or the RS 232 cable is removed conserving system power automatically without changes to the hardware or operating system The ICL3217E powers up again when a valid RS 232 voltage is applied to any receiver input Table 1 summarizes the features of the devices represented by this data sheet while application Note AN9863 summarizes the features of each device comprising the ICL32XXE family Processing Moisture Sensitive Surface Mount Devices SMDs Pinout ICL3207E ICL3217E SOIC SSOP TOP VIEW TABLE 1 SUMMARY OF FEATURES NO OF MONITOR MANUAL AUTOMATIC NO OF NO OF RX DATA RATE RX ENABLE POWER POWERDOWN
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intersil ICL3207E Manual