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| Solved by SP232A/233A/310A/312A TM Enhanced RS-232 Line Drivers/Receivers FEATURES C1+ 1 Operates from Single +5V Power Supply V+ 2 15 GND Meets All RS-232F and ITU V.28 C1- 3 14 T1OUT Specifications C2+ 4 13 R1IN Operates with 0.1F to 1F Capacitors C2- 5 12 R1OUT High Data Rate - 120Kbps Under Load Available in Lead Free Packaging V- 6 11 T1IN Low Power CMOS - 3mA Operation (SP232A) T2OUT 7 10 T2IN No External Capacitors Required (SP233A) R2IN 8 9 R2OUT Low Power Shutdown (SP310A,SP312A) Enhanced ESD Protection (2kV Human Body Model) Now Available in Lead Free Packaging SP232A 16 VCC DESCRIPTION The SP232A/233A/310A/312A devices are a family of line driver and receiver pairs that meet the specifications of RS-232 and V.28 serial protocols. These devices are pin-to-pin compatible with popular industry standards. As with the initial versions, the SP232A/233A/310A/312A devices feature at least 120Kbps data rate under load, 0.1F charge pump capacitors, and overall ruggedness for commercial applications. This family also features Sipex's BiCMOS design allowing low power operation without sacrificing performance. The series is available in plastic DIP and SOIC packages operating over the commercial and industrial temperature ranges. SELECTION TABLE Number of RS232 Model Drivers Receivers SP232A 2 2 SP233A SP310A SP312A Jan 3-07 Rev B No. of Receivers No. of External Active in Shutdown 0.1F Capacitors Shutdown WakeUp TTL Tri-State N//A 4 No No No N/A 0 2 0 4 4 SP232A/233A/30A/32A 2 2 2 2 2 2 No Yes Yes No No Yes No Yes Yes (c) 2007 Sipex Corporation ABSOLUTE MAXIMUM RATINGS This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Vcc ................................................................................................................................................................. +6V V+ .................................................................................................................... (Vcc-0.3V) to +11.0V V- ............................................................................................................................................................ -11.0V Input Voltages TIN ......................................................................................................................... -0.3 to (Vcc +0.3V) RIN ............................................................................................................................................................ 30V Output Voltages TOUT .................................................................................................... (V+, +0.3V) to (V-, -0.3V) ROUT ................................................................................................................ -0.3V to (Vcc +0.3V) Short Circuit Duration TOUT ......................................................................................................................................... Continuous Plastic DIP .......................................................................... 375mW (derate 7mW/C above +70C) Small Outline ...................................................................... 375mW (derate 7mW/C above +70C) VCC=+5V10%; 0.1F charge pump capacitors; TMINto T MAX unless otherwise noted. ELECTRICAL CHARACTERISTICS UNITS Volts Volts A Volts Volts A Volts Ohms mA Kbps CONDITIONS TIN; EN, SD TIN; EN, SD TIN= ZeroV IOUT= 3.2mA; Vcc = +5V IOUT= -1.0mA EN= V CC, ZeroV VOUT VCC SP310A and SP312A only All transmitter outputs loaded with 3k to Ground VCC= ZeroV; V = 2V OUT Infinite duration CL= 2500pF, R L= 3k PARAMETERS TTL INPUT Logic Threshold LOW HIGH Logic Pull-Up Current TTL OUTPUT TTL/CMOS Output Voltage, Low Voltage, High Leakage Current; TA= +25 RS-232 OUTPUT Output Voltage Swing MIN. TYP. MAX. 0.8 2.0 15 200 0.4 3.5 0.05 10 5 6 18 240 +30 1.2 1.7 0.5 5 1.5 0.1 10 400 250 3 10 15 25 1 10 5 15 2.4 1.0 7 3.0 1.0 30 Output Resistance 300 Output Short Circuit Current Maximum Data Rate 120 RS-232 INPUT Voltage Range -30 Voltage Threshold LOW 0.8 HIGH Hysteresis 0.2 Resistance 3 DYNAMIC CHARACTERISTICS Driver Propagation Delay Receiver Propagation Delay Instantaneous Slew Rate Transition Region Slew Rate Output Enable Time Output Disable Time POWER REQUIREMENTS VCCPower Supply Current SP232A SP233A, SP310A, SP312A VCCSupply Current,Loaded SP232A SP233A, SP310A, SP312A Shutdown Supply Current SP310A,SP312A Jan 3-07 Rev B Volts Volts Volts Volts k s s V/s V/s ns ns mA mA mA mA A VCC= 5V, T A= +25 C VCC= 5V, T A= +25 C VCC= 5V, T A= +25 C TA= +25 C, -15V V IN +15V TTL to RS-232; CL= 50pF RS-232 to TTL CL= 10pF, R L= 3-7k ; TA=+25 C CL= 2500pF, R L= 3k ; measured from +3V to -3V or -3V to +3V SP310A and SP312A only SP310A and SP312A only No load, TA= +25C; VCC= 5V No load, TA= +25C; VCC= 5V All transmitters RL= 3k ; TA = +25 C All transmitters RL= 3k ; TA = +25 C VCC= 5V, T A= +25 C (c) 2007 Sipex Corporation SP232A/233A/30A/32A 2 Not 100% tested. -11 -10 -9 V- Voltage (Volts) PERFORMANCE CURVES 9.0 8.5 12 10 30 25 20 ICC (mA) -8 -7 -6 -5 -4 -3 0 2 4 6 VCC= 6V V+ (Volts) 8 6 4 2 VCC= 5V VCC= 4V VCC= 6V VCC= 6V VOH (Volts) 8.0 7.5 7.0 6.5 6.0 5.5 Load current = 0mA TA= 25 C VCC= 5V 15 VCC= 5V VCC= 4V VCC= 3V -40 0 25 70 85 125 10 5 VCC= 4V 8 10 12 14 0 Load Current (mA) 0 5 10 15 20 25 30 35 40 Load Current (mA) 0 -55 5.0 4.5 4.75 5.0 VCC(Volts) 5.25 5.5 Temperature (C) PINOUTS T2IN T1IN R1OUT R1IN T1OUT GND VCC V+ DNC GND C1+ V+ C1C2+ C2VT2OUT R2IN 1 2 3 16 VCC 15 GND 14 T1OUT 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 13 12 11 20-PIN SOIC See Figure 2 for Pin Connections R2OUT R2IN T2OUT Conn to 10 Conn to 11 Conn to 12 C1- DNC C1+ DNC Conn to 15 Conn to 16 SP233ACT/AET SP232A 4 5 6 7 8 13 R1IN 12 R1OUT 11 T1IN 10 T2IN 9 R2OUT Conn to 17 10 T 2IN T1 IN R1 OUT R1 IN T1 OUT GND VCC C1 + GND C2 - 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 20-PIN PLASTIC DIP R2 OUT R2 IN T2 OUT VC2 C 2+ V+ C1 VC2 + NC * C1+ V+ C1C2+ C2VT2OUT R2IN 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 ON/OFF VCC GND T1OUT R1IN R1OUT T1IN T2IN R2OUT EN * C1+ V+ C1C2+ C2VT2OUT R2IN 1 2 3 4 5 6 7 8 9 18 17 16 15 SHUTDOWN VCC GND T1OUT R1IN R1OUT T1IN T2IN R2OUT SP233ACP/AEP SP310A * N.C. for SP310E_A, EN for SP312E_A SP312A 14 13 12 11 10 Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation 3 FEATURES... The SP232A/233A/310A/312A devices are a family of line driver and receiver pairs that meet the specifications of RS-232 and V.28 serial protocols. The ESD tolerance has been improved on these devices to over 2KV for the Human Body Model. These devices are pin-topin compatible with popular industry standards. The SP232A/233A/310A/312A devices feature10V/s slew rate, 120Kbps data rate under load, 0.1F charge pump capacitors, overall ruggedness for commercial applications, and increased drive current for longer and more flexible cable configurations. This family also features Sipex's BiCMOS design allowing low power operation without sacrificing performance. The SP232A/233A/310A/312A devices have internal charge pump voltage converters which allow them to operate from a single +5V supply. The charge pumps will operate with polarized or non-polarized capacitors ranging from 0.1 to F 1 and will generate the 6V needed for the RS232 output levels. Both meet all EIA RS-232F and ITU V.28 specifications. The SP310A provides identical features as the SP232A with the addition of 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 identical to the SP310A with separate tri-state and shutdown control lines. THEORY OF OPERATION The SP232A, SP233A, SP310A and SP312A devices are made up of three basic circuit blocks - 1) a driver/transmitter, 2) a receiver 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-232output voltage swing is 6V. Even under worst case loading conditions of 3kOhms and 2500pF, the output is guaranteed to be 5V, which is consistent with the RS-232 standard specifications. The transmitter outputs are protected against infinite short-circuits to ground without degradation in reliability. +5V INPUT 10 F 6.3V + 0.1 F + 10V 5 TTL/CMOS OUTPUTS TTL/CMOS INPUTS 1 0.1 F + 6.3V 3 4 16 C+ 1 V CC C 1C+ 2 V+ 0.1 F 6.3V 2+ * Charge Pump V- 6 + 0.1 F 10V C 2400k T1 IN 11 400k T2 IN R 1 OUT 10 T1 T2 14 T 1OUT 7 T 2OUT R 1 IN 5k 8 5k R 2 IN R 2 OUT 9 SP232A R 2 GND 15 *The negative terminal of the V+ storage capacitor can be tied to either VCCor GND. Connecting the capacitor to V CC(+5V) is recommended. Figure 1. Typical Circuit using the SP232A. Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation RS-232 INPUTS 12 R 1 13 RS-232 OUTPUTS +5V INPUT +5V INPUT 7 TTL/CMOS OUTPUTS TTL/CMOS INPUTS TTL/CMOS OUTPUTS TTL/CMOS INPUTS V CC RS-232 OUTPUTS 7 V CC T1 IN 2 T1 IN 2 400k T1 T2 5 T 1OUT 400k T1 T2 5 T 1OUT T2 IN R 1 OUT 1 400k 18 T 2OUT R 1 IN T2 IN R 1 OUT 1 400k 18 T 2OUT R 1 IN RS-232 INPUTS 5k 19 5k 19 5k C + 12 C 2 + 15 2 R 2 OUT 20 8 C+ 1 R2 5k 2 R 2 IN R 2 OUT 20 13 C + 1 14 8 10 17 C 1V+ VV- R2 R 2 IN Do not make connection to these pins 13 C 1V+ SP233ACP C + 11 C 2 + 15 C2 C2 10 16 14 Connect on PCB Pin 11 to Pin 15 Pin 10 to Pin 16 Pin 12 to Pin 17 Both Pins 6 and 9 to GND Do not make connection to these pins Connect on PCB Pin 12 to Pin 15 Pin 11 to Pin 16 Pin 10 to Pin 17 Both Pins 6 and 9 to GND 12 V17 V- GND 6 GND 9 SP233ACT GND GND 6 9 C2 C2 - 11 16 Figure 2. Typical Circuits using the SP233ACP and SP233ACT The instantaneous slew rate of the transmitter output is internally limited to a maximum of 30V/ s in order to meet the standards [EIA RS-232-F ]. The transition region slew rate of these enhanced products is typically 10V/s. The smooth transition of the loaded output from VOL to VOH clearly meets the monotonicity requirements of the standard [EIA RS-232-F]. 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 +5V INPUT 10 F 6.3V inputs have a typical hysteresis margin of 500mV. 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 3V RS-232 requirements. The receiver inputs are also protected against voltages up to 25V. Should an input be left unconnected, a 5K pulldown resistor to ground will commit the output of the receiver to a high state. +5V INPUT 10 F 6.3V + + 0.1 F + 16V 6 TTL/CMOS OUTPUTS TTL/CMOS INPUTS 2 0.1 F + 6.3V 4 5 17 C+ 1 V CC C 1C+ 2 0.1 F 10V 3+ V+ Charge Pump V400k 7 * 0.1 F 10V TTL/CMOS INPUTS + C 2- 0.1 F + 16V 6 2 0.1 F + 6.3V 4 5 17 C+ 1 V CC C 1C+ 2 V+ 0.1 F 10V 3+ * 10V Charge Pump V400k 7 + 0.1 F C 2- T1 IN 12 400k T1 T2 15 T 1OUT RS-232 OUTPUTS T1 IN 12 400k T1 T2 15 T 1OUT T2 IN R 1 OUT 11 8 T 2OUT R 1 IN T2 IN 11 8 T 2OUT RS-232 INPUTS 5k 9 5k R 2 IN ON/OFF R 1 OUT R 1 IN 5k 9 5k R 2 IN R 2 OUT 10 R 2 SP310A GND 16 R 2 OUT EN 10 R 2 SP312A GND 16 18 1 18 SHUTDOWN *The negative terminal of the V+ storage capacitor can be tied to either VCCor GND. Connecting the capacitor to V CC(+5V) is recommended. *The negative terminal of the V+ storage capacitor can be tied to either VCCor GND. Connecting the capacitor to V CC(+5V) is recommended. Figure 3. Typical Circuits using the SP310A and SP312A Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation RS-232 INPUTS 13 R 1 14 TTL/CMOS OUTPUTS 13 R 1 14 RS-232 OUTPUTS RS-232 INPUTS 3 R1 4 3 R1 4 RS-232 OUTPUTS VCC= +5V +Vcc C1 + - C2 + - + C4 - + VDDStorage Capacitor (V+) VSSStorage Capacitor (V-) - -Vcc -Vcc C3 Figure 4. Charge Pump -- Phase 1 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 to print, only to realize the printer wasn't turned 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 is a Sipex-patented design (5,306,954) and uses a unique approach compared to older less-efficient designs. The charge pump still requires four external capacitors, but uses a four-phase voltage shifting technique to attain symmetrical power supplies. There is a free-running oscillator that controls the four phases of the voltage shifting. A description of each phase follows. Phase 1 -- VSS charge storage --During this phase of the clock cycle, the positive side of capacitors C1 and C2 are initially charged to +5V. Cl+ is then switched to ground and the charge in C1- is transferred to C2-. Since C2+ is connected to +5V, the voltage potential across capacitor C2 is now 10V. Phase 2 -- VSStransfer -- Phase two of the clock connects the negative terminal of C2 to the VSS storage capacitor and the positive terminal of C2 to ground, and transfers the generated -l0V to C3. Simultaneously, the positive side of capacitor C 1 is switched to +5V and the negative side is connected to ground. Phase 3 -- VDD charge storage -- The third phase of the clock is identical to the first phase -- the charge transferred in C1produces -5V in the negative terminal of C1, which is applied to the negative side of capacitor C2. Since C2+ is at +5V, the voltage potential across C2 is a maximum of l0V. Phase 4 -- VDD transfer -- The fourth phase of the clock connects the negative terminal of C2 to ground, and transfers the generated l0V across C2 to C4, the VDD storage capacitor. Again, simultaneously with this, the positive side of capacitor C1 is switched to +5V and the negative side is connected to ground, and the cycle begins again. Since both V+ and V- are separately generated from VCC; in a no-load condition V+ and V- will be symmetrical. Older charge pump approaches VCC= +5V C1 + - C2 + - + C4 - + VDDStorage Capacitor VSSStorage Capacitor - Vss C3 Figure 5. Charge Pump -- Phase 2 Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation VDD a) C2 + GND GND b) C - 2 Vss Figure 6. Charge Pump Waveforms that generate V- from V+ will show a decrease in the magnitude of V- compared to V+ due to the inherent inefficiencies in the design. The clock rate for the charge pump typically operates at greater than 15kHz. The external capacitors can be as low as 0.1F with a 10V breakdown voltage rating. Shutdown (SD) and Enable (EN) for the SP310A and SP312A Both the SP310A and SP312A have a shutdown/ standby mode to conserve power in battery-powered 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 VCC= +5V +5V C1 + - C4 + - - + C2 + - VDDStorage Capacitor VSSStorage Capacitor -5V -5V C3 Figure 7. Charge Pump -- Phase 3 Vcc = +5V VDD C1 + - C2 + - + C4 - + VDDStorage Capacitor VSSStorage Capacitor - C3 Figure 8. Charge Pump -- Phase 4 Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation 7 SP310A transmitter and receiver outputs in a high impedance condition (tri-stated). The shutdown mode is controlled on the SP312A by a logic "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 for the SP312A 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 5A supply current. 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 "wake up" the computer, allowing it to accept data transmission. After the ring indicator signal has propagated 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 1s. The enable time for V+ and V- is 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. SD 0 0 1 1 EN 0 1 0 1 Power Up/Down Down Down Up Up Receiver Outputs Enable Tri-state Enable Tri-state Pin Strapping for the SP233ACT/ACP The SP233A packaged in the 20-pin SOIC package (SP233ACT) has a slightly different pinout than the SP233A in PDIP packaging (SP233ACP). To operate properly, the following pairs of pins must be externally wired together: Pins Wired Together Two V- Pins Two C2+ Pins Two C2- Pins SOIC PDIP 10 & 17 12 & 17 12 & 15 11 & 15 11 & 16 10 & 16 No Connections for Pins 8, 13, and 14 Connect Pins 6 and 9 to GND Table 1. Wake-up Function Truth Table. Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation PAckAgE: 16 Pin nSoic Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation PAckAgE: 16 Pin WSoic Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation 0 PAckAgE: 18 Pin WSoic Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation PAckAgE: 20 Pin WSoic Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation 2 PAckAgE: 16 Pin PDiP Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation 3 PAckAgE: 18 Pin PDiP Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation PAckAgE: 20 Pin PDiP Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation ORDERING INFORMATION Part Number Temperature Range Topmark Package SP232ACN.............................0C to +70C................................SP232ACN..........................................................................16-pin NSOIC SP232ACN/TR.......................0C to +70C................................SP232ACN..........................................................................16-pin NSOIC SP232ACP.............................0C to +70C.................................SP232ACP.........................................................................16-pin PDIP SP232ACT.............................0C to +70C.................................SP232ACT..........................................................................16-pin WSOIC SP232ACT/TR.......................0C to +70C.................................SP232ACT..........................................................................16-pin WSOIC SP232AEN..........................-40C to +85C................................SP232AEN..........................................................................16-pin NSOIC SP232AEN/TR....................-40C to +85C................................SP232AEN..........................................................................16-pin NSOIC SP232AEP..........................-40C to +85C................................SP232AEP..........................................................................16-pin PDIP SP232AET..........................-40C to +85C................................SP232AET...........................................................................16-pin WSOIC SP232AET/TR.....................-40C to +85C................................SP232AET...........................................................................16-pin WSOIC SP233ACP.............................0C to +70C.................................SP232ACP.........................................................................20-pin PDIP SP233ACT............................0C to +70C.................................SP233ACT...........................................................................20-pin WSOIC SP233ACT/TR......................0C to +70C.................................SP233ACT...........................................................................20-pin WSOIC SP233AEP..........................-40C to +85C................................SP232AEP..........................................................................20-pin PDIP SP233AET..........................-40C to +85C................................SP233AET...........................................................................20-pin WSOIC SP233AET/TR.....................-40C to +85C................................SP233AET...........................................................................20-pin WSOIC SP310ACP............................0C to +70C.................................SP310ACP.........................................................................18-pin PDIP SP310ACT............................0C to +70C.................................SP310ACT..........................................................................18-pin WSOIC SP310ACT/TR......................0C to +70C.................................SP310ACT..........................................................................18-pin WSOIC SP310AEP..........................-40C to +85C................................SP310AEP..........................................................................18-pin PDIP SP310AET..........................-40C to +85C................................SP310AET...........................................................................18-pin WSOIC SP310AET/TR.....................-40C to +85C................................SP310AET...........................................................................18-pin WSOIC SP312ACP............................0C to +70C.................................SP312ACP..........................................................................18-pin PDIP SP312ACT............................0C to +70C.................................SP312ACT...........................................................................18-pin WSOIC SP312ACT/TR......................0C to +70C.................................SP312ACT...........................................................................18-pin WSOIC SP312AEP..........................-40C to +85C................................SP312AEP...........................................................................18-pin PDIP SP312AET..........................-40C to +85C................................SP312AET............................................................................18-pin WSOIC SP312AET/TR.....................-40C to +85C................................SP312AET............................................................................18-pin WSOIC Available in lead free packaging. To order add "-L" suffix to part number. Example: SP312AEA/TR = standard; SP312AEA-L/TR = lead free. /TR = Tape and Reel Pack quantity is 1,500 for WSOIC and 2,500 for NSOIC. Solved by Sipex corporation TM Solved by Sipex tm Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 03 TEL: (0) 3-700 FAX: (0) 3-700 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 herein; neither does it convey any license under its patent rights nor the rights of others. Jan 3-07 Rev B SP232A/233A/30A/32A (c) 2007 Sipex Corporation |
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