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PDF ST3241E Data sheet ( Hoja de datos )
| Número de pieza | ST3241E | |
| Descripción | RS-232 TRANSCEIVER WITH AUTO-POWERDOWN | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ST3241E (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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ST3241E
±15KV ESD PROTECTED 3 TO 5.5V, 400KBPS,
RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
s ESD PROTECTION FOR RS-232 I/O PINS:
±8KV IEC 1000-4-2 CONTACT DISCHARGE
±15KV HUMAN BODY MODEL
s 1µA SUPPLY CURRENT ACHIEVED WHEN
IN AUTO-POWERDOWN
s 250Kbps MINIMUM GUARANTEED DATA
RATE
s GUARANTEED 6V/µs SLEW RATE RANGE
s GUARANTEED MOUSE DRIVEABILITY
s 0.1µF EXTERNAL CAPACITORS
s MEET EIA/TIA-232 SPECIFICATIONS DOWN
TO 3V
s AVAILABLE IN SO-28, SSOP28 AND
TSSOP28 PACKAGES
DESCRIPTION
The ST3241E device consists of 3 drivers, 5
receivers and a dual charge-pump circuit. The
device meets the requirements of 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 protected to ±8KV USING
IEC 1000-4-2 contact discharge and ±15KV using
the Human Body Model. The receiver R2 is
always active to implement a wake-up feature for
serial port.
The ST3241E has a proprietary low-dropout
transmitter output stage enabling true RS-232
performance from a 3.0V to 5.5V supply with a
dual charge pump. The device is guaranteed to
run at data rates of 250kbps while maintaining
RS-232 output levels.
SOP
SSOP
TSSOP
It is a complete serial port (3 drivers, 5 receivers)
intended for notebook or subnotebook computers.
Receivers R1 and R2 have extra outputs in
addition to their standard outputs. These extra
outputa are always active.
Typical application are in notebook, subnotebook,
palmtop computers, battery-powered equipment,
hand-held equipment, peripherals and printers.
October 2002
1/10
1 page  
ST3241E
RECEIVER ELECTRICAL CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
Parameter
Test Conditions
Min. Typ.
VRIN
VRIL
Receiver Input Voltage
Operating Range
RS-232 Input Threshold
Low
VRIH RS-232 Input Threshold
High
VRIHYS Input Hysteresis
RRIN Input Resistance
TA = 25°C
TA = 25°C
TA = 25°C
TA = 25°C
VCC = 3.3V
VCC = 5.0V
VCC = 3.3V
VCC = 5.0V
TA = 25°C
-25
0.6 1.2
0.8 1.5
1.5
1.8
0.3
35
Max.
25
2.4
2.4
7
Unit
V
V
V
V
KΩ
TIMING CHARACTERISTICS
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Symbol
Parameter
Test Conditions
DR Maximum Data Rate
RL = 3KΩ CL= 1000pF
one trasmitter switching
tPHL Receiver Propagation Delay RIN to ROUT
tPLH
CL = 150pF
tT_SKEW Transmitter Skew
tR_SKEW Receiver Skew
SRT Transition Slew Rate
TA = 25°C RL = 3K to 7KΩ VCC = 3.3V
measured from +3V to -3V or -3V to +3V
CL = 150pF to 1000pF
CL = 150pF to 2500pF
Min.
250
6
4
Typ.
0.15
100
300
Max.
30
30
Unit
Kbps
µs
ns
ns
V/µs
V/µs
5/10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet ST3241E.PDF ] | |
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