ST3237EC ,15KV ESP PROTECTED 3 TO 5.5V 250KBPS RS-232 TRANSCEIVER WITH STAND-BYST3237E±15KV ESD-PROTECTED, 1μA, 3 TO 5.5V, 250KBPS,RS-232 TRANSCEIVER WITH STAND-BY■ EDS PROTECTIO ..
ST3237ECPR ,15KV ESP PROTECTED 3 TO 5.5V 250KBPS RS-232 TRANSCEIVER WITH STAND-BYST3237E±15KV ESD-PROTECTED, 1μA, 3 TO 5.5V, 250KBPS,RS-232 TRANSCEIVER WITH STAND-BY■ EDS PROTECTIO ..
ST3241EB ,15KV ESD PROTECTED 3 TO 5.5 V, 400 KBPS RS-232 TRANSCEIVER WITH AUTO-POWERDOWNST3241E±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS,RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
ST3237EB-ST3237EC
15KV ESP PROTECTED 3 TO 5.5V 250KBPS RS-232 TRANSCEIVER WITH STAND-BY
1/13January 2003 EDS PROTECTION FOR RS-232 I/O PINS:
±15KV HUMAN BODY MODEL
±8KV IEC 1000-4-2 CONTACT DISCHARGE 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 AVAILABLEIN SO-28, SSOP-28 AND
TSSOP28 LOW SUPPLY CURRENT 300μA
DESCRIPTIONThe ST3237Eisa 3V to 5.5V powered EIA/
TIA-232 and V.28/V.24 communication interfaces
high data-rate capability and enhanced
electrostatic discharge (ESD) protectionat ±8KV
using IEC1000-4-2 contact discharge and ±15kV
using Human Body Model (HBM). The other pins
are protected with standard ESD protectionat
±2kV using HBM method. The ST3237Cisa
transceiver(5 drivers,3 receivers)for fast modem
applications.
The device has a proprietary low-dropout
transmitter output stage providing true RS-232
performance froma 3Vto 5.5V supply usinga
dual charge pump. The deviceis guaranteedto
run at data rates of 250Kbps in the normal
operation mode and 1Mbpsin the very high speed
operation mode while maintaining RS-232 output
levels.
ORDERING CODES
ST3237E±15KV ESD-PROTECTED, 1μA,3 TO 5.5V, 250KBPS,
RS-232 TRANSCEIVER WITH STAND-BY
ST3237E2/13
PIN DESCRIPTION
ST3237E3/13
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGSAbsoluteMaximum Ratingsare those values beyond which damagetothe device may occur. Functional operation under these conditionis
not implied.V+ andV-can havea maximum magnitudeof +7V,but their absolute additioncannot exceed13V.
SHUTDOWN AND ENABLE CONTROL TRUTH TABLE
ST3237E4/13
ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS
ELECTRICAL CHARACTERISTICS(C1 -C4 =0.1μF, VCC =3V to5.5V,TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
LOGIC INPUT ELECTRICAL CHARACTERISTICS1 -C4 =0.1μF,VCC =3V to5.5V,TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
Note1: Transmitter input hysteresisis typically 250mV
TRANSMITTER ELECTRICAL CHARACTERISTICS(C1 -C4 =0.1μF testedat 3.3V±10%, VCC =3Vto 5.5V, TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
ST3237E5/13
RECEIVER ELECTRICAL CHARACTERISTICS(C1 -C4 =0.1μF testedat 3.3V±10%, VCC =3Vto 5.5V, TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
TIMING CHARACTERISTICS1 -C4 =0.1μF testedat 3.3V±10%,VCC =3Vto 5.5V,TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
Transmitter Skewis measuredatthe transmitter zero cross points
ST3237E6/13
APPLICATION CIRCUITS
CAPACITANCE VALUE (μF)
ST3237E7/13
TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specifiedTj =25°C)
Figure1: LOW Level Receiver Output Current
Figure2: HIGH Level Receiver Output Current
ESD PROTECTIONNote: The High ESD protected pinsaretheI/O RS232 line, transmitteroutand receiverin. The other pins guarantee± 2KV HBM ESD pro-
tection versus groundby meansof diodes.
