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ST3237
3 TO 5.5V, 250KBPS, RS-232 TRANSCEIVER WITH STAND-BY
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1A LOW POWER SHUTDOWN WITH RECEIVERS ACTIVE GUARENTEED DATA RATE 250Kbps (Normal Operation) 1Mbps (Very High Speed Operation) GUARANTEED SLEW RATE RANGE 6V/s (Normal Operation) 24V/s (Very High Speed Operation) 0.1F EXTERNAL CAPACITORS FLOW-THROUGH PINOUT 500A LOW SUPPLY CURRENT MEET EIA/TIA-232 SPECIFICATIONS DOWN TO 3V AVAILABLE IN SO-28, SSOP-28 AND TSSOP28
SSOP
SOP
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 ORDERING CODES
Type ST3237CD ST3237BD ST3237CDR ST3237BDR ST3237CPR ST3237BPR ST3237CTR (*) ST3237BTR (*)
(*) Available on request
TSSOP
operation mode and 1Mbps in the very high speed operation mode while maintaning RS-232 output levels.
Temperature Range 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
Package 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)
Comments 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
May 2002
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ST3237
PIN DESCRIPTION
PlN N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 SYMBOL C2+ GND C2VT1OUT T2OUT T3OUT R1IN R2IN T4OUT R3IN T5OUT EN SHDN VHSCI R1OUTB T5IN R3OUT T4IN R2OUT R1OUT T3IN T2IN T1N C1 VCC V+ C1+ NAME AND FUNCTION Positive Terminal of Inverting Charge Pump Capacitor Ground Negative Terminal of Inverting Charge Pump Capacitor 5.5V Generated by the Charge Pump First Transmitter Output Voltage Second Transmitter Output Voltage Third Transmitter Output Voltage First Receiver Input Voltage Second Receiver Input Voltage Fourth Transmitter Output Voltage Third Receiver Input Voltage Fifth Transmitter Output Voltage 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. Fifth Transmitter Input Voltage Third Receiver Output Voltage Fourth Transmitter Input Voltage Second Receiver Output Voltage First Receiver Output Voltage Third Transmitter Input Voltage Second Transmitter Input Voltage First Transmitter Input Voltage Negative Terminal of Voltage- Charge Pump Capacitor Supply Voltage -5.5V Generated by the Charge Pump Positive Terminal of Voltage- Charge Pump Capacitor
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ST3237
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Symbol VCC V+ VV+ +|V-| TIN SHDN, EN VHSCI RIN TOUT tSHORT Tstg Very High Speed Control Input Receiver Input Voltage Range Transmitter Output Voltage Range Short Circuit Durtion on TOUT (one at a time) Storage Temperature Range Supply Voltage Doubled Voltage Terminal Inverted Voltage Terminal Transmitter Input Voltage Range Parameter Value -0.3 to 6 -0.3 to 7 0.3 to -7 13 -0.3 to 6 -0.3 to 6 -0.3 to (VCC +0.3) 25 13.2 -0.3 to (VCC + 0.3) Continuous -65 to 150 C Unit V V V V V V V V V V
ROUT ROUTB Receiver Output Voltage Range
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.
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ST3237
ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1F, V CC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to TA = 25C)
Symbol ISHDN Parameter No Load Shutdown Supply Current Test Conditions VCC = 3V or 5.0V TA = 25C SHDN=GND TA = 25C Min. Typ. 0.5 1 Max. 2 10 Unit mA A ISUPPLY VCC Power Supply Current
LOGIC INPUT ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1F, V CC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to TA = 25C)
Symbol VTIL VTIH IIL Parameter Input Logic Threshold Low (Note 1) Input Logic Threshold High (Note 1) Input Leakage Current Output Leakage Current Output Voltage Low Output Voltage High Test Conditions T-IN, VHSCI, EN, SHDN VCC = 3.3V VCC = 5V T-IN, VHSCI, EN, SHDN Receiver Disabled IOUT = 1.6mA IOUT = -1mA VCC-0.6 VCC-0.1 2 2.4 Min. Typ. Max. 0.8 Unit V V V
0.01
0.05
1.0
10 0.4
A
A V V
IOL
VOL VOH
Note 1: Transmitter input hysteresis is typically 250mV
TRANSMITTER ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1F tested at 3.3V10%, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to TA = 25C)
Symbol VTOUT RTOUT ISC Parameter Output Voltage Swing Transmitter Output Resistance Output Short Circuit Current Test Conditions All Transmitter outputs are loaded with 3K to GND VCC = V+ = V- = 0V VOUT = 2V Min. 5 Typ. 5.4 3000 25 60 Max. Unit V mA
RECEIVER ELECTRICAL CHARACTERISTICS (C1 - C4 = 0.1F tested at 3.3V10%, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to TA = 25C)
Symbol VRIN VRIL VRIH Parameter Receiver Input Voltage Operating Range RS-232 Input Threshold Low RS-232 Input Threshold High Test Conditions Min. -25 TA = 25C TA = 25C TA = 25C TA = 25C TA = 25C VCC = 3.3V VCC = 5V VCC = 3.3V VCC = 5V 3 0.6 0.8 1.2 1.5 1.5 1.8 0.3 5 7 2.4 2.4 Typ. Max. 25 Unit V V V V V V K
VRIHYS Input Hysteresis RRIN Input Resistance
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ST3237
TIMING CHARACTERISTICS (C1 - C4 = 0.1F tested at 3.3V10%, VCC = 3V to 5.5V, TA = -40 to 85C, unless otherwise specified. Typical values are referred to TA = 25C)
Symbol DR Parameter Maximum Data Rate Test Conditions RL = 3K CL= 1000pF one trasmitter switching VHSCI=GND RL = 3K CL= 250pF one trasmitter switching VHSCI=VCC VCC= 3 to 5.55V RIN to ROUT |tPHL - tTLH| |tPHL - tTLH| tR_SKEW Receiver Skew tOER tODR SRT Receiver Output Enable Time Receiver Output Disable Time Transition Slew Rate |tPHL - tTLH| Normal Operation Normal Operation TA = 25C RL = 3 to 7K 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 CL = 150pF VHSCI=GND VHSCI=VCC Min. 250 100 Typ. Max. Unit Kbps Kbps
tPHLR tPLHR
Propagation Delay Input to Output
0.15 100 60 50 80 130
s ns ns ns ns ns
tT_SKEW Transmitter Skew
6 24 4
30 150 30
V/s V/s V/s
Transmitter Skew is measured at the transmitter zero cross points
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ST3237
APPLICATION CIRCUITS
CAPACITANCE VALUE (F)
VCC 3.0 to 3.6 4.5 to 5.5 3.0 to 5.5 6/12 C1 0.22 0.047 0.22 C2 0.22 0.33 1.0 C3 0.22 0.33 1.0 C4 0.22 0.33 1.0 Cbypass 0.22 0.33 0.22
ST3237
TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified Tj = 25C) 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
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ST3237
Figure 7 : Receiver Input Resistance
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ST3237
SO-28 MECHANICAL DATA
mm. DIM. MIN. A a1 b b1 C c1 D E e e3 F L S 7.40 0.50 17.70 10.00 1.27 16.51 7.60 1.27 8 (max.) 0.291 0.020 18.10 10.65 0.1 0.35 0.23 0.5 45 (typ.) 0.697 0.393 0.050 0.650 0.300 0.050 0.713 0.419 TYP MAX. 2.65 0.3 0.49 0.32 0.004 0.014 0.009 0.020 MIN. TYP. MAX. 0.104 0.012 0.019 0.012 inch
0016023
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ST3237
SSOP28 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.55 0.75 0.050 1.65 0.22 0.09 9.9 7.4 5 10.2 7.8 5.3 0.65 BSC 10 0.95 0 0.022 0.030 1.75 1.85 0.38 0.25 10.5 8.2 5.6 TYP MAX. 2 0.002 0.065 0.009 0.004 0.390 0.291 0.197 0.402 0.307 0.209 0.0256 BSC 10 0.037 0.069 0.073 0.015 0.010 0.413 0.323 0.220 MIN. TYP. MAX. 0.079 inch
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ST3237
TSSOP28 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0.09 9.6 6.2 4.3 9.7 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 9.8 6.6 4.48 0.002 0.031 0.007 0.004 0.378 0.244 0.169 0.382 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0089 0.386 0.260 0.176 inch
0128292B
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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. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2002 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com
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