ST3237 3 TO 5.5V, 250KBPS, RS-232 TRANSCEIVER WITH STAND-BY ■ ■ ■ ■ ■ ■ ■ ■ 1µA LOW POWER SHUTDOWN WITH RECEIVERS ACTIVE GUARENTEED DATA RATE 250Kbps (Normal Operation) 1Mbps (Very High Speed Operation) GUARANTEED SLEW RATE RANGE 6V/µs (Normal Operation) 24V/µs (Very High Speed Operation) 0.1µF EXTERNAL CAPACITORS FLOW-THROUGH PINOUT 500µA LOW SUPPLY CURRENT MEET EIA/TIA-232 SPECIFICATIONS DOWN TO 3V AVAILABLE IN SO-28, SSOP-28 AND TSSOP28 DESCRIPTION The ST3237 is a 3V to 5.5V powered EIA/TIA-232 and V.28/V.24 communication interfaces high data-rate capabilities. ST3237 is a transceiver (5 drivers, 3 receivers) for fast modem applications. The device has a proprietary low-dropout transmitter output stage providing true RS-232 performance from a 3V to 5.5V supply using a dual charge pump. The device is guaranteed to run at data rates of 250Kbps in the normal SOP SSOP TSSOP operation mode and 1Mbps in the very high speed operation mode while maintaning RS-232 output levels. ORDERING CODES Type Temperature Range Package Comments ST3237CD ST3237BD ST3237CDR ST3237BDR ST3237CPR ST3237BPR ST3237CTR (*) ST3237BTR (*) 0 to 70 °C -40 to 85 °C 0 to 70 °C -40 to 85 °C 0 to 70 °C -40 to 85 °C 0 to 70 °C -40 to 85 °C SO-28 (Tube) SO-28 (Tube) SO-28 (Tape & Reel) SO-28 (Tape & Reel) SSOP-28 (Tape & Reel) SSOP-28 (Tape & Reel) TSSOP28 (Tape & Reel) TSSOP28 (Tape & Reel) 27parts per tube / 12tube per box 27parts per tube / 12tube per box 1000 parts per reel 1000 parts per reel 1350 parts per reel 1350 parts per reel 2500 parts per reel 2500 parts per reel (*) Available on request May 2002 1/12 ST3237 PIN DESCRIPTION PlN N° NAME AND FUNCTION 1 C2+ Positive Terminal of Inverting Charge Pump Capacitor 2 GND C2- Ground Negative Terminal of Inverting Charge Pump Capacitor 3 4 5 VT1OUT 5.5V Generated by the Charge Pump First Transmitter Output Voltage 6 T2OUT Second Transmitter Output Voltage 7 T3OUT Third Transmitter Output Voltage 8 R1IN First Receiver Input Voltage 9 R2IN Second Receiver Input Voltage 10 T4OUT 11 R3IN 12 T5OUT Fifth Transmitter Output Voltage 13 14 15 EN SHDN VHSCI 16 R1OUTB Receiver Enable, Active Low Shutdown Control, Active Low Very High Speed Control Input. Connect to GND for normal operation; connect to VCC for 1Mbps transmission rates. Non Inverting Complementary Receiver Output. Always Active. Fourth Transmitter Output Voltage Third Receiver Input Voltage 17 T5IN Fifth Transmitter Input Voltage 18 R3OUT Third Receiver Output Voltage 19 T4IN Fourth Transmitter Input Voltage 20 R2OUT Second Receiver Output Voltage 21 R1OUT First Receiver Output Voltage 22 T3IN Third Transmitter Input Voltage 23 T2IN Second Transmitter Input Voltage 24 T1N First Transmitter Input Voltage 25 C1 - Negative Terminal of Voltage- Charge Pump Capacitor 26 VCC Supply Voltage 27 V+ C1+ -5.5V Generated by the Charge Pump Positive Terminal of Voltage- Charge Pump Capacitor 28 2/12 SYMBOL ST3237 PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS Symbol VCC V+ VV+ +|V-| TIN Parameter -0.3 to 6 V -0.3 to 7 0.3 to -7 13 V V V Transmitter Input Voltage Range -0.3 to 6 V -0.3 to 6 -0.3 to (VCC +0.3) V VHSCI Very High Speed Control Input RIN Receiver Input Voltage Range Transmitter Output Voltage Range ROUT ROUTB Receiver Output Voltage Range tSHORT Tstg Unit Doubled Voltage Terminal Inverted Voltage Terminal SHDN, EN TOUT Value Supply Voltage Short Circuit Durtion on TOUT (one at a time) Storage Temperature Range V ± 25 V ± 13.2 V -0.3 to (VCC + 0.3) V Continuous -65 to 150 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. V+ and V- can have a maximum magnitude of +7V, but their absolute addition can not exceed 13 V. 3/12 ST3237 ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1µF, V CC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter ISUPPLY VCC Power Supply Current ISHDN Shutdown Supply Current Test Conditions No Load VCC = 3V or 5.0V Min. TA = 25°C SHDN=GND TA = 25°C Typ. Max. Unit 0.5 2 mA 1 10 µA Typ. Max. Unit 0.8 V LOGIC INPUT ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1µF, V CC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter VTIL Input Logic Threshold Low (Note 1) Input Logic Threshold High (Note 1) VCC = 3.3V VCC = 5V IIL Input Leakage Current T-IN, VHSCI, EN, SHDN ± 0.01 ± 1.0 µA ± 0.05 ± 10 µA 0.4 V VTIH Test Conditions Min. T-IN, VHSCI, EN, SHDN 2 2.4 IOL Output Leakage Current Receiver Disabled VOL Output Voltage Low IOUT = 1.6mA VOH Output Voltage High IOUT = -1mA V V VCC-0.6 VCC-0.1 V Note 1: Transmitter input hysteresis is typically 250mV TRANSMITTER ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1µF tested at 3.3V±10%, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter VTOUT Output Voltage Swing RTOUT Transmitter Output Resistance Output Short Circuit Current ISC Test Conditions All Transmitter outputs are loaded with 3KΩ to GND VCC = V+ = V- = 0V VOUT = ± 2V Min. Typ. ±5 ± 5.4 V 3000 Ω ± 25 Max. ± 60 Unit mA RECEIVER ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1µF tested at 3.3V±10%, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol VRIN VRIL VRIH Parameter Test Conditions Receiver Input Voltage Operating Range RS-232 Input Threshold Low TA = 25°C TA = 25°C VCC = 3.3V VCC = 5V RS-232 Input Threshold High TA = 25°C TA = 25°C VCC = 3.3V VCC = 5V Min. -25 0.6 0.8 4/12 Input Resistance Max. Unit 25 V 1.2 1.5 1.5 1.8 VRIHYS Input Hysteresis RRIN Typ. V V 2.4 2.4 V V 7 KΩ 0.3 TA = 25°C 3 5 V ST3237 TIMING CHARACTERISTICS (C1 - C4 = 0.1µF tested at 3.3V±10%, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol DR Parameter Maximum Data Rate Test Conditions RL = 3KΩ CL= 1000pF one trasmitter switching VHSCI=GND RL = 3KΩ CL= 250pF one trasmitter switching VHSCI=VCC VCC= 3 to 5.55V Min. Typ. Max. Unit 250 Kbps 100 Kbps RIN to ROUT CL = 150pF 0.15 µs tT_SKEW Transmitter Skew |tPHL - tTLH| VHSCI=GND 100 ns |tPHL - tTLH| VHSCI=VCC 60 ns tR_SKEW Receiver Skew |tPHL - tTLH| 50 ns Normal Operation 80 ns Normal Operation 130 ns tPHLR tPLHR tOER tODR SRT Propagation Delay Input to Output Receiver Output Enable Time Receiver Output Disable Time Transition Slew Rate TA = 25°C RL = 3 to 7KΩ VCC = 3.3V measured from +3V to -3V or -3V to +3V CL = 150pF to 1000pF VHSCI=GND CL = 150pF to 1000pF VHSCI=VCC CL = 150pF to 2500pF VHSCI=GND 6 24 4 30 150 30 V/µs V/µs V/µs Transmitter Skew is measured at the transmitter zero cross points 5/12 ST3237 APPLICATION CIRCUITS CAPACITANCE VALUE (µF) VCC C1 C2 C3 C4 Cbypass 3.0 to 3.6 4.5 to 5.5 3.0 to 5.5 0.22 0.047 0.22 0.22 0.33 1.0 0.22 0.33 1.0 0.22 0.33 1.0 0.22 0.33 0.22 6/12 ST3237 TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified Tj = 25°C) Figure 1 : Input Voltage Range for Trasmitter Figure 4 : Transfer Characteristics for Receiver Figure 2 : Transfer Characteristics for Transmitter Figure 5 : Output Current vs Output High Voltage Figure 3 : Transfer Characteristics for Receiver Figure 6 : Output Current vs Output Low Voltage 7/12 ST3237 Figure 7 : Receiver Input Resistance 8/12 ST3237 SO-28 MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 2.65 MAX. 0.104 a1 0.1 0.3 0.004 0.012 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 C 0.5 0.020 c1 45° (typ.) D 17.70 18.10 0.697 0.713 E 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 16.51 0.650 F 7.40 7.60 0.291 0.300 L 0.50 1.27 0.020 0.050 S 8° (max.) 0016023 9/12 ST3237 SSOP28 MECHANICAL DATA mm. inch DIM. MIN. TYP A MIN. TYP. 2 A1 0.050 A2 1.65 b MAX. 0.079 0.002 1.85 0.065 0.22 0.38 0.009 0.015 c 0.09 0.25 0.004 0.010 D 9.9 10.2 10.5 0.390 0.402 0.413 E 7.4 7.8 8.2 0.291 0.307 0.323 E1 5 5.3 5.6 0.197 0.209 0.220 e 10/12 MAX. 1.75 0.65 BSC K 0° L 0.55 0.75 0.069 0.073 0.0256 BSC 10° 0° 0.95 0.022 10° 0.030 0.037 ST3237 TSSOP28 MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 D 9.6 9.7 9.8 0.378 0.382 0.386 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 e 1 0.65 BSC K 0° L 0.45 0.60 0.0256 BSC 8° 0° 0.75 0.018 8° 0.024 0.030 0128292B 11/12 ST3237 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement 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 STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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