SP207HBCT

® SP207H/SP211H +5V High–Speed RS-232 Transceivers s s s s s s s s s Single 5V Supply Operation 0.1µF External Charge Pump Capacitors 460kbps Minimum Data Rate Standard SOIC and SSOP Packages SP207H - Five (5) Drivers and Three (3) Receivers SP211H - Four (4) Drivers and Five (5) Receivers 1µA Shutdown Mode WakeUp Feature in Shutdown Mode Tri–State Receiver Outputs Ideal for V.34 and High Speed RS-232 Applications DESCRIPTION… The SP207H and SP211H are multi–channel RS-232 line transceivers configured to fit most communication needs. The "H" series is based on Sipex's SP200 Series transceivers and has been enhanced for speed. The data rate is improved to over 460kbps which easily meets the 230.4kbps data rates for V.34. The SP207H and SP211H use the same on-board charge pump to provide ±10V voltage levels, using 0.1µF charge pump capacitors to save board space and reduce circuit cost. The SP207HB, SP211H and SP211HB feature a low–power shutdown mode, which reduces power supply drain to 1µA. A WakeUp function keeps the receivers active in the shutdown mode (SP207HB and SP211HB only). +5V INPUT 9 0.1µF 6.3V 10 0.1µF 6.3V + C1 + VCC V+ 11 0.1µF + 6.3V 0.1µF 16V + +5V INPUT 11 0.1µF 6.3V 12 0.1µF 6.3V + C1 + VCC V+ 13 0.1µF + 6.3V 0.1µF 16V + 12 C – 1 + 13 C + 2 V– 15 14 C – 1 + 15 C + 2 V– 17 0.1µF 16V SP207 14 C2 – 400KOHM 0.1µF 16V SP211 16 C2 – 400KOHM TTL/CMOS INPUTS T1 IN 7 400KOHM T1 2 T1 OUT 400KOHM T2 IN 6 400KOHM T3 IN 20 400KOHM T4 IN 21 T4 28 T4 OUT T3 1 T3 OUT T2 3 T2 OUT TTL/CMOS INPUTS T2 IN 6 400KOHM T2 3 T2 OUT T3 IN 18 400KOHM T3 1 T3 OUT T4 IN 19 400KOHM T4 24 T4 OUT RS-232 OUTPUTS R1 OUT 8 R1 5KOHM R2 5KOHM R3 5KOHM R4 5KOHM R5 5KOHM 9 R1 IN T5 IN T5 T5 OUT R2 OUT R2 IN TTL/CMOS OUTPUTS RS-232 INPUTS R1 OUT 5 R1 5KOHM R2 5KOHM R3 5KOHM 8 GND 4 R1 IN R3 OUT 26 27 R3 IN R2 OUT 22 23 R4 OUT 22 23 R4IN R2 IN R3 OUT 17 16 R5 OUT EN 19 24 18 R5 IN R3 IN 25 SD 10 GND Number of RS-232 Model Drivers Receivers SP207H 5 3 SP207HB 5 3 SP211H 4 5 SP211HB 4 5 Table 1. Model Selection Table TGoddard/SP207H/9614R0 No. of Receivers No. of External Active in Shutdown 0.1µF Capacitors 0 4 3 4 0 4 5 4 Shutdown WakeUp TTL Tri–State No No No Yes Yes Yes Yes No Yes Yes Yes Yes SP207H/SP211H High–Speed Transceivers © Copyright 2000 Sipex Corporation 1 RS-232 INPUTS 21 20 TTL/CMOS OUTPUTS 5 4 RS-232 OUTPUTS T1 IN 7 T1 2 T1 OUT ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VCC ............................................................................................ +6V V+ ................................................................. (VCC – 0.3V) to +13.2V V– ........................................................................................... 13.2V Input Voltages TxIN ................................................................. –0.3V to (VCC +0.3V) RxIN ....................................................................... ±30V at ≤100mA Output Voltages TOUT .......................................................... (V+, +0.3V) to (V–, –0.3V) ROUT ................................................................. –0.3V to (VCC +0.3V) Short Circuit Duration on TOUT ....................................... Continuous Power Dissipation Plastic DIP .......................................................................... 375mW (derate 7mW/°C above +70°C) Small Outline ...................................................................... 375mW (derate 7mW/°C above +70°C) SPECIFICATIONS VCC at nominal ratings; 0.1µF charge pump capacitors; TMIN to TMAX, unless otherwise noted. PARAMETER TTL INPUTS (DRIVER) Logic Threshold VIL VIH Logic Pullup Current Data Rate TTL OUTPUTS (RECEIVER) Compatibility VOL VOH Leakage Current RS-232 OUTPUT (DRIVER) Output Voltage Swing MIN. TYP. MAX. UNIT CONDITIONS TIN, EN, SD 0.8 2.0 460 1.5 600 TTL/CMOS 0.4 3.5 0.05 ±10 10.0 Volts Volts µA kbps TIN = 0V CL = 1,000pF, RL = 3kΩ ROUT IOUT = 3.2mA; VCC = +5V IOUT = –1.0mA Volts Volts µA EN = VCC; 0V ≤ ROUT ≤ VCC ; TA = +25°C ±5 ±7 ±25 +15 10.0 2.4 1.0 7 Volts Ohms mA Volts µA Volts Volts Volts kΩ kbps µs µs V/µs V/µs Power-Off Output Resistance 300 Output Short Circuit Current RS-232 INPUT (RECEIVER) Voltage Range –15 Logic Pull Down Current Voltage Threshold VIL 0.8 VIH Hysteresis 0.2 Resistance 3 Data Rate 460 DYNAMIC CHARACTERISTICS Propagation Delay Instantaneous Slew Rate Transition Region Slew Rate All transmitter outputs loaded with 3kΩ to ground VCC = 0V; VOUT = ±2V Infinite duration 3.0 1.2 1.7 0.5 5 600 1.0 1.5 60 5 TA = +25°C VCC = +5V, TA = +25°C VCC = +5V, TA = +25°C VCC = +5V VIN = ±15V; TA = +25°C TTL–to–RS-232 RS-232–to–TTL CL = 50pF, RL = 3–7kΩ; TA = +25°C CL = 1,000pF, RL = 3kΩ; measured from +3V to –3V or –3V to +3V TGoddard/SP207H/9614R0 SP207H/SP211H High–Speed Transceivers © Copyright 2000 Sipex Corporation 2 SPECIFICATIONS VCC at nominal ratings; 0.1µF charge pump capacitors; TMIN to TMAX, unless otherwise noted. PARAMETER Output Enable Time Output Disable Time POWER REQUIREMENTS VCC ICC MIN. TYP. 400 250 MAX. UNIT ns ns CONDITIONS 4.75 5.00 5 20 1 5.25 10 Volts mA mA µA No load; VCC = 5V; TA = +25°C All transmitters RL = 3kΩ; TA = +25°C TA = +25°C Shutdown Current 10 ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial, –C 0 +70 °C Extended, –E –40 +85 °C Storage Temperature –65 +125 °C Package –A Shrink (SSOP) small outline –T Wide (SOIC) small outline TGoddard/SP207H/9614R0 SP207H/SP211H High–Speed Transceivers © Copyright 2000 Sipex Corporation 3 PINOUT T3 OUT T1OUT T2OUT R1IN R1OUT T2IN T1IN GND VCC C1+ V+ C1– 1 2 3 4 5 24 23 22 21 20 T4 OUT R2IN R2OUT T5IN T5OUT T4IN T3IN R3OUT R3IN V– C2– C2+ T3 OUT T1OUT T2OUT R2IN R2OUT T2IN T1IN R1OUT R1IN GND VCC C1+ V+ C1– 1 2 3 4 5 6 28 27 26 25 24 23 T4 OUT NC T5IN SHUTDOWN (SD) EN T5OUT NC T4IN T3IN R3OUT R3IN V– C2– C2+ SP207 6 7 8 9 10 11 12 19 18 17 16 15 14 13 SP207B 7 8 9 10 11 12 13 14 22 21 20 19 18 17 16 15 T3 OUT T1OUT T2OUT R2IN R2OUT T2IN T1IN R1OUT R1IN GND VCC C1+ V+ C1– 1 2 3 4 5 6 28 27 26 25 24 23 T4 OUT R3IN R3OUT SHUTDOWN (SD) EN R4IN R4OUT T4IN T3IN R5OUT R5IN V– C2– C2+ T3 OUT T1OUT T2OUT R2IN R2OUT T2IN T1IN R1OUT R1IN GND VCC C1+ V+ C1– 1 2 3 4 5 6 28 27 26 25 24 23 T4 OUT R3IN R3OUT SHUTDOWN (SD) EN R4IN R4OUT T4IN T3IN R5OUT R5IN V– C2– C2+ SP211B 7 8 9 10 11 12 13 14 22 21 20 19 18 17 16 15 7 8 9 10 11 12 13 14 22 21 20 19 18 17 16 15 FEATURES… The SP207H and SP211H line transceivers provide a variety of configurations to fit most communication needs, especially those applications where ±12V is not available. Both products feature low–power CMOS construction and Sipex–proprietary on-board charge pump circuitry to generate the ±10V RS-232 voltage levels. The ability to use 0.1µF charge pump capacitors saves board space and reduces circuit cost. The SP207HB and SP211H models feature a low–power shutdown mode, which reduces power supply drain to 1µA. The SP207HB and SP211HB are equipped with the WakeUp function. The WakeUp function keeps the receivers active in the shutdown mode, unless disabled by the EN pin. TGoddard/SP207H/9614R0 SP211 THEORY OF OPERATION The SP207H and SP211H are made up of three basic circuit blocks — 1) transmitter/driver, 2) receiver and 3) the Sipex–proprietary charge pump. 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 10V power supplies. Figure 3a shows the waveform found on the positive side of capcitor C2, and Figure 3b shows the SP207H/SP211H High–Speed Transceivers © Copyright 2000 Sipex Corporation 4 VCC = +5V +5V C1 + – C4 + – + C2 + – – VDD Storage Capacitor VSS Storage Capacitor –5V –5V C3 Figure 1. Charge Pump — Phase 1 negative side of capcitor C2. 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 — VSS transfer — 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 C1 produces –5V in the negative terminal of C1, which is applied to the negative side of capacitor C2. Since C2+ is at +5V, the VCC = +5V voltage potential across C2 is 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 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 15kHz. The external capacitors can be as low as 0.1µF with a 16V breakdown voltage rating. Transmitter/Driver The drivers are inverting transmitters which have been improved for speed over the SP200 Series. The transmitters accept either TTL or CMOS inputs and output the RS-232 signals at data rates over 400kbps. Typically, the RS-232 output volt C4 + – + C1 + – C2 + – – VDD Storage Capacitor VSS Storage Capacitor –10V C3 Figure 2. Charge Pump — Phase 2 TGoddard/SP207H/9614R0 SP207H/SP211H High–Speed Transceivers © Copyright 2000 Sipex Corporation 5 +10V a) C + 2 GND GND b) C2 – –10V Figure 3. Charge Pump Waveforms age swing is ±9V with no load, and ±5V minimum with full load. The transmitter outputs are protected against infinite short–circuits to ground without degradation in reliability. The SP207HB, SP211H and SP211HB drivers can be tri–stated by using the SHUTDOWN function. In the “power off” state, the output impedance will remain greater than 300 ohms, again satisfying the RS-232 specifications. Should the input of the driver be left open, an internal 400Kohm pullup resistor to VCC forces the input high, thus committing the output to a low state. Because of the increased speed, the slew rate is typically 60V/µS which is above the RS-232 specifcation of 30V/µS. This is the only parameter that exceeds the RS-232 limits. 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 500mV. This ensures that the receiver is virtually immune to noisy transmission lines. Should an input be left unconnected, a 5Kohm pulldown resistor to ground will commit the output of the receiver to a high state. VCC = +5V +5V C1 + – C4 + – + C2 + – – VDD Storage Capacitor VSS Storage Capacitor –5V –5V C3 Figure 4. Charge Pump — Phase 3 TGoddard/SP207H/9614R0 SP207H/SP211H High–Speed Transceivers © Copyright 2000 Sipex Corporation 6 VCC = +5V +10V C1 + – C4 + – + C2 + – – VDD Storage Capacitor VSS Storage Capacitor C3 Figure 5. Charge Pump — Phase 4 SHUTDOWN MODE The SP207HB, SP211H and SP211HB all feature a control input which will disable the device and reduce the power supply current to less than 10µA, making the parts ideal for battery–powered systems. In the “shutdown” mode the receivers and transmitters will both be tri–stated. The V+ output of the charge pump will discharge to VCC , and the V– output will discharge to ground. For complete shutdown to occur and the 10µA power drain to be realized, the following conditions must be met: • +5V must be applied to the SD pin • ENABLE must be either 0V, +5.0V or not connected • the transmitter inputs must be either +5.0V or not connected • VCC must be +5V • Receiver inputs must be >0V and