Sipex SP231A/232A/233A/310A/312A handbook
Contents
1. Copyright 2000 Sipex Corporation 5V INPUT RS 232 OUTPUTS o E 2 n zZ 0D a E 232 INPUTS o E 2 a E 2 o 0 9 z o o RS Figure 4 Typical Circuits using the SP233ACP and SP233ACT Shutdown SD and Enable EN SP310A SP312A Only Both the SP310A and SP312A have a shut down standby mode to conserve power in battery pow ered systems To activate the shutdown mode which stops the operation of the charge pump a logic 0 is applied to the appropriate control line For the SP310A this control line is ON OFF pin 18 Activating the shutdown mode also puts the SP310A transmitter and receiver outputs in a high impedance condition tri stated The shutdown mode is controlled on the SP312A by alogic 0 on the SHUTDOWN control line pin 18 this also puts the transmitter outputs in a tri state mode The receiver outputs can be tri stated separately during normal operation or shutdown by a logic 1 on the ENABLE line pin 1 Wake Up Feature SP312A Only The SP312A has a wake up feature that keeps all the receivers in an enabled state when the device is in the shutdown mode Table 1 defines the truth table for the wake up function With only the receivers activated the SP312A typically draws less than 511A supply current 10UA maximum In the case of a modem interfaced to a computer in power down mode the Ring Indicator RI signal from the modem would be used to wa2. SP231 A 232A 233A 310A 312A Enhanced RS 232 Line Drivers Receivers E Operates from Single 5V Power Supply E Meets All RS 232D and V 28 Specifications B Multiple Drivers and Receivers E Small Charge Pump Capacitors 0 1uF BI Operates with 0 1uF and 1004 F Capacitors E High Data Rate 120kbps Under Load B High Output Slew Rate 10V us Under Load B Low Power Shutdown lt 1uA B 3 State TTL CMOS Receiver Outputs B 30V Receiver Input Levels B Low Power CMOS 15mA Operation DESCRIPTION The Sipex SP231A SP232A and SP233A are enhanced versions of the Sipex SP231 SP232 and SP233 RS 232 line drivers receivers They are pin for pin replacements for these earlier versions and will operate in their sockets Performance enhancements include 10V us slew rate 120k bits per second guaranteed transmission rate and increased drive current for longer and more flexible cable configurations Ease of use enhancements include smaller 0 1uF charge pump capacitors enhanced ESD protection low power dissipation and overall ruggedized construction for commercial environments The series is available in plastic and ceramic DIP and SOIC packages operating over the commercial industrial and military temperature ranges RS 232 OUTPUTS RS 232 INPUTS TTL CMOS INPUTS TTL CMOS OUTPUTS SP231ADS 01 SP231A Enhanced RS 232 Line Drivers Receivers Copyright 2000 Sipex Corporation Output Voltages ABSOLUTE MAXIMUM RATINGS This i
3. identical to the SP310A with separate tri state and shutdown control lines The SP231A is available in 14 pin plastic DIP CERDIP and 16 pin SOIC packages for opera tion over commercial industrial and military temperature ranges The SP232A is available in 16 pin plastic DIP SOIC and CERDIP 1 S3 o of I INTERNAL OSCILLATOR gt Figure 1 Charge Pump Voltage Doubler SP231ADS 01 SP231A Enhanced RS 232 Line Drivers Receivers packages operating over the commercial industrial and military temperature ranges The SP233A is available in a 20 pin plastic DIP and 20 pin SOIC package for operation over the commercial and industrial temperature ranges The SP310A and SP312A are available in 18 pin plastic CERDIP and SOIC packages for operation over the commercial and industrial temperature ranges Please consult the factory for DIP and surface mount packaged parts supplied on tape on reel as well as parts screened to MIL M 38510 THEORY OF OPERATION The SP231A SP232A SP233A SP310A and SP312A devices are made up of three basic circuit blocks 1 adriver transmitter 2 areceiver and 3 a charge pump Each block is described below Driver Transmitter The drivers are inverting transmitters which accept TTL or CMOS inputs and output the RS 232 signals with an inverted sense relative to the input logic levels Typically the RS 232 output voltage swing is 9V Even under worst case loading conditions of 3kOhms
4. pin Plastic DIP SP233AET 40 C to 85 C 20 pin SOIC SP310ACP 0 C to 70 C 18 pin Plastic DIP SP310ACT 0 C to 70 C 18 pin SOIC SP310ACX 0 C to 70 C SP310AEP 40 C to 85 C 18 pin Plastic DIP SP310AET 40 C to 85 C 18 pin SOIC SP312ACP 0 C to 70 C 18 pin Plastic DIP SP312ACT 0 C to 70 C 18 pin SOIC SP312ACX 0 C to 70 C SP312AEP 40 C to 85 C 18 pin Plastic DIP SP312AET 40 C to 85 C 18 pin SOIC Please consult the factory for pricing and availability on a Tape On Reel option Cinav VIAA SIG NAL PROC ESSING EXC ELLENC E Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica MA 01821 TEL 978 667 8700 FAX 978 670 9001 e mail sales sipex com Sales Office 233 South Hillview Drive Milpitas CA 95035 TEL 408 934 7500 FAX 408 935 7600 Sipex Corporation reserves the right to make changes to any products described herein Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing neither does it convey any license under its patent rights nor the rights of others SP231ADS 01 SP231A Enhanced RS 232 Line Drivers Receivers Copyright 2000 Sipex Corporation 8
5. 5V INPUT 10 UF 6 3V I 17 Voc 5V to 10V Voltage Doubler 5V to 10V Voltage Doubler 10V to 10V 10V to 10V Voltage Inverter Voltage Inverter RS 232 OUTPUTS TTL CMOS INPUTS RS 232 OUTPUTS 05 A z O Q lt pa RS 232 INPUTS 05 jes n 9 e o TTL CMOS OUTPUTS RS 232 INPUTS SP310A SHUTDOWN GND 16 The negative terminal of the V storage capacitor can be tied to either Vec or GND Connecting the capacitor to Vec 5V is recommended The negative terminal of the V storage capacitor can be tied to either Vcc or GND Connecting the capacitor to Voc 5V is recommended Figure 5 Typical Circuits using the SP310A and SP312A SP231ADS 01 SP231A Enhanced RS 232 Line Drivers Receivers Copyright 2000 Sipex Corporation 7 ORDERING INFORMATION Temperature Range 0 C to 70 C 14 pin Plastic DIP SP231ACT 0 C to 70 C 16 pin SOIC SP231ACX 0 C to 70 C SP231AEP 40 C to 85 C 14 pin Plastic DIP SP231AET 40 C to 85 C 16 pin SOIC SP232ACN 0 C to 70 C 16 pin N SOIC SP232ACP 0 C to 70 C 16 pin Plastic DIP SP232ACT 0 C to 70 C 16 pin SOIC SP232ACX 0 C to 70 C SP232AEN 40 C to 85 C 16 pin N SOIC SP232AEP 40 C to 85 C 16 pin Plastic DIP SP232AET 40 C to 85 C 16 pin SOIC SP233ACP 0 C to 70 C 20 pin Plastic DIP SP233ACT 0 C to 70 C 20 pin SOIC SP233AEP 40 C to 85 C 20
6. RS232 to TTL Instantaneous Slew Rate Transition Region Slew Rate Output Enable Time Output Disable Time POWER REQUIREMENTS Voc Power Supply Current V Power Supply Current Shutdown Supply Current SP310A and SP312A only SP231A only SP231A Enhanced RS 232 Line Drivers Receivers lour 3 2mA Voc 5V louz 1 0mA EN Vec OV lt Vour SVcc CC All transmitter outputs loaded with 3kO to Ground Voc OV C 10pF R 3 7kQ T 25 C C 2500pF R 3kQ measured from 8V to 3V or 3V to 3V SP310A and SP312A only SP310A and SP312A only No load T 25 C V All transmitters R 3kQ T 25 C No load V 12V T 25 C Voc OV T 25 C Copyright 2000 Sipex Corporation PERFORMANCE CURVES Load current 0mA Ta 25 C V Voltage Volts V Volts Von Volts 0 0 2 4 6 8 10 12 14 5 10 15 20 25 30 35 40 4 4 75 5 0 Load Current mA Load Current mA Temperature C Vcc Volts 14 Pin Plastic DIP 16 Pin SOIC o U N oo O gt O U LOVEESdS 20 PIN PLASTIC DIP 20 PIN SOIC SHUTDOWN Voc GND T OUT R IN R OUT Ti IN T IN R OUT SP231ADS 01 SP231A Enhanced RS 232 Line Drivers Receivers Copyright 2000 Sipex Cor
7. and 2500pF the output is guaranteed to be 5V whichis consistent with the RS 232 standard specifications The transmitter outputs are protected against infinite short circuits to ground without degradation in reliability The instantaneous slew rate of the transmitter output is internally limited to a maximum of 30V us in order to meet the standards EIA RS 232 D 2 1 7 Paragraph 5 However the transition region slew rate of these enhanced products is typically 10V us The smooth transition of the loaded output from Vo to Vog clearly meets the monotonicity requirements of the standard EIA RS 232 D 2 1 7 Paragraphs 1 amp 2 S1 S3 vo o l GND FROM Co C4 VOLTAGE DOUBLER so S4 GND au NAE M Ba sn V V I I I I I I INTERNAL OSCILLATOR q Figure 2 Charge Pump Voltage Inverter Copyright 2000 Sipex Corporation Receivers The receivers convert RS 232 input signals to inverted TTL signals Since the input is usually from a transmission line where long cable lengths and system interference can degrade the signal the inputs have a typical hysteresis margin of 500m V This ensures that the receiver is virtually immune to noisy transmission lines The input thresholds are 0 8V minimum and 2 4V maximum again well within the 43V RS 232 requirements The receiver inputs are also protected against voltages up to 30V Should an input be left unconnected a 5kOhm pulldown resistor to ground will c
8. ke up the computer allowing it to accept data transmission SP231ADS 01 5V INPUT TTL CMOS INPUTS RS 232 OUTPUTS TTL CMOS OUTPUTS S RS 232 INPUTS After the ring Indicator signal has propaeated through the SP312A receiver it can be used to trigger the power management circuitry of the computer to power up the microprocessor and bring the SD pin of the SP312A to a logic high taking it out of the shutdown mode The receiver propagation delay is typically lus The enable time for V and Vis typically 2ms After V and V have settled to their final values a signal can be sent back to the modem on the data terminal ready DTR pin signifying that the computer is ready to accept and transmit data Pin Strapping SP233ACT Only The SP233A packaged in the 20 pin SOIC package SP233ACT has a slightly different pinout than the SP233A in other package configurations To operate properly the following pairs of pins must be externally wired together the two V pins pins 10 and 17 the two C5 pins pins 12 and 15 the two C pins pins 11 and 16 All other connections features functions and performance are identical to the SP233A as specified elsewhere in this data sheet Receiver 1 0 Up Enable 1 1 Up Tri state Power Sb em uptow ENN UM RENE Table I Wake up Function Truth Table SP231A Enhanced RS 232 Line Drivers Receivers Copyright 2000 Sipex Corporation 5V INPUT
9. ommit the output of the receiver to a high state In actual system applications it is quite possible for signals to be applied to the receiver inputs before power is applied to the receiver circuitry This occurs for example when a PC user attempts toprint only torealizethe printer wasn tturned on In this case an RS 232 signal from the PC will appear on the receiver input at the printer When the printer power is turned on the receiver will operate normally All of these enhanced devices are fully protected Charge Pump The charge pump section of the these devices allows the circuit to operate from a single 45V 10 power supply by generating the required operating voltages internal to the devices The charge pump consists of two sections 1 a voltage doubler and 2 a voltage inverter 45V INPUT V 48 5V to 13 2V 13 Voc 12V to 12V b Voltage Inverter L 400k Q G 400k Q RS 232 OUTPUTS LT 2 Qa z o lt RS 232 INPUTS TTL CMOS OUTPUTS SP231A GND 12 Figure 3 Typical Circuits using the SP231A and 232A SP231ADS 01 SP231A Enhanced RS 232 Line Drivers Receivers As shown in Figure 1 an internal oscillator trig gers the charge accumulation and voltage inver sion The voltage doubler momentarily stores a charge on capacitor C equal to V referenced to ground During the next transition of the oscillator this charge is boot strapped to transfer charge to ca
10. pacitor C The voltage across C is now from V to V In the inverter section Figure 2 the voltage across C is transferred to C forcing a range of 0 V to V across C Boot strapping of C will then transfer charge to C to genrate V One of the significant enhancements over previous products of this type is that the values of the capacitors are no longer critical and have been decreased in size considerably to 0 1uF Because the charge pump runs at a much higher frequency the 0 1uF capacitors are sufficient to transfer and sustain charges to the two transmitters APPLICATION HINTS Protection From Shorts to 15V The driver outputs are protected against shorts to ground other driver outputs and VT or V If the possibility exists that the outputs could be inadvertently connected to voltages higher than 15V then it is recommended that external protection be provided For protection against voltages exceeding 15 V two back to back zener diodes connected from each output to ground will clamp the outputs to an acceptable voltage level 5V INPUT 10 UF 6 3V 5V to 10V Voltage Doubler 10V to 10V Cp Voltage Inverter E 400k Q 14 E 400k Q 7 TTL CMOS INPUTS RS 232 OUTPUTS TTL CMOS OUTPUTS gt m m s o o c c 4 4 RS 232 INPUTS 13 SP232A GND 15 The negative terminal of the V storage capacitor can be tied to either Voc or GND Connecting the capacitor to Vec 5V is recommended
11. poration 3 FEATURES The Sipex SP231A SP232A and SP233A are enhanced versions of the Sipex SP231 SP232 andSP233RS 232linedrivers receivers They arepin for pin replacements for these earlier versions will operate in their sockets with capacitors ranging from 0 1 to LOOUF either polarized or non polarized and feature several improvements in both performance and ease of use Performance enhancements include 10V us slew rate 120k bits per second guaranteed transmission rate and increased drive current for longerand more flexible cable configurations Ease of useenhancementsincludesmaller O 1 uFchargepump capacitors enhanced ESD protection low power dissipation and overall ruggedized construction for commercial environments The SP232A SP233A SP310A and SP312A include charge pump voltage converters which allow them to operate from a single 5V supply These converters convert the 5 V input power to the 10V needed to generate the RS 232 output levels Both meet all EIA RS 232D and CCITT V 28 specifica tions The SP231A has provisions for external V supplies With this power supplied externally the current drain due to charge pump operation is considerably reduced typically to 400uA The SP310A provides identical features as the SP232A The SP310A has a single control line which simultaneously shuts down the internal DC DC converter and puts all transmitter and receiver outputs into a high impedance state The SP312A is
12. s a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation V 0 3V to V 0 3V A 0 3V to Vcc 0 3V Short Circuit Duration sections of this specification is not implied Exposure to absolute ilasa aa s pa M TNR E Continuous maximum rating conditions for extended periods of time may affect Power Dissipation reliability CERDA Aua A EI LEES A 675mW derate 9 5mW C above 70 C V M nnusvussnsgtuegnin scbsesusun senxe RUBENS CHIC PUE MDC HIOERD MIS 46V Plastic DIP ccccccccccccccccecececcecccceecececcececceccececcececeecenceece 375mW MEE Vcc 0 3V to 13 2V derate 7mW C above 7096 Meses ca etc a Mae aa maymanpash add E 13 2V Small Outline RRRERECEEEERCEERNT EA 375mW Input Voltages derate 7mW C above 70 C T E RS 0 3 to Vcc 0 3V Reme ae ce 30V SPECIFICATIONS Voc tOV 10 V 8 5V to 13 2V SP231A only 0 1uF charge pump capacitors Tyn to Tuay unless otherwise noted PARAMETERS MIN TYP MAX MAX UNITS CONDITIONS SP231ADS 01 TTL INPUT Logic Threshold LOW HIGH Logic Pullup Current Maximum Data Rate TTL OUTPUT TTL CMOS Output Voltage Low Voltage High Leakage Current T 425 RS 232 OUTPUT Output Voltage Swing Output Resistance Output Short Circuit Current RS 232 INPUT Voltage Range Voltage Threshold LOW HIGH Hysteresis Resistance DYNAMIC CHARACTERISTICS Propagation Delay
Download Pdf Manuals
Related Search
Sipex SP231A/232A/233A/310A/312A handbook