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ST3241EBPR-ST3241ECPR
15KV ESD PROTECTED 3 TO 5.5 V, 400 KBPS RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
1/10October 2002 ESD PROTECTION FOR RS-232 I/O PINS:
±8KV IEC 1000-4-2 CONTACT DISCHARGE
±15KV HUMAN BODY MODEL 1μA SUPPLY CURRENT ACHIEVED WHEN AUTO-POWERDOWN 250Kbps MINIMUM GUARANTEED DATA
RATE GUARANTEED 6V/μsSLEW RATERANGE GUARANTEED MOUSE DRIVEABILITY 0.1μF EXTERNAL CAPACITORS MEET EIA/TIA-232 SPECIFICATIONS DOWN 3V AVAILABLEIN SO-28, SSOP28 AND
TSSOP28 PACKAGES
DESCRIPTIONThe ST3241E device consists of3 drivers,5
receivers anda dual charge-pump circuit. The
device meets the requirementsof EIA/TIA and
V.28/V.24 comunication standards providing high
data rate capability and enhanced electrostatic
discharge (ESD) protection.All transmitter outputs
and receiver input are protectedto ±8KV USING
IEC 1000-4-2 contact discharge and ±15KV using
the Human Body Model. The receiver R2is
always activeto implementa wake-up feature for
serial port.
The ST3241E hasa proprietary low-dropout
transmitter output stage enabling true RS-232
performance froma 3.0Vto 5.5V supply witha
dual charge pump. The deviceis guaranteedto
runat data ratesof 250kbps while maintaining
RS-232 output levels.isa complete serial port(3 drivers,5 receivers)
intendedfor notebookor subnotebook computers.
Receivers R1 and R2 have extra outputs in
additionto their standard outputs. These extra
outputa are always active.
Typical application arein notebook, subnotebook,
palmtop computers, battery-powered equipment,
hand-held equipment, peripherals and printers.
ST3241E±15KV ESD PROTECTED3 TO 5.5V, 400KBPS,
RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
ST3241E2/10
ORDERING CODES
PIN DESCRIPTION
ST3241E3/10
PIN CONFIGURATION
SHUTDOWN AND ENABLE CONTROL TRUTH TABLE
ABSOLUTE MAXIMUM RATINGSAbsoluteMaximum Ratingsare those values beyond which damagetothe device may occur. Functional operation under these conditionis
not implied.
Note1:V+ andV-can have magnitudeof7V,but their absolute difference cannot exceed 13V
ST3241E4/10
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 AND RECEIVER OUTPUT ELECTRICAL CHARACTERISTICS1 -C4 =0.1μF,VCC =3V to5.5V,TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
RECEIVER OUTPUT ELECTRICAL CHARACTERISTICS(C1 -C4 =0.1μF, VCC =3V to5.5V,TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
TRANSMITTER ELECTRICAL CHARACTERISTICS1 -C4 =0.1μF,VCC =3V to5.5V,TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
ST3241E5/10
RECEIVER ELECTRICAL CHARACTERISTICS(C1 -C4 =0.1μF, VCC =3V to5.5V,TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
TIMING CHARACTERISTICS(C1 -C4 =0.1μF, VCC =3V to5.5V,TA= -40to 85°C, unless otherwise specified.
Typical values are referredtoTA =25°C)
ST3241E6/10
APPLICATION CIRCUITS
Figure1: REQUIRED MINIMUM CAPACITANCE VALUE (μF)
