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ST3243BDR Folha de dados(PDF) 1 Page - STMicroelectronics

Nome de Peças ST3243BDR
Descrição Electrónicos  3 TO 5.5V, 400KBPS, RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
Download  11 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST3243BDR Folha de dados(HTML) 1 Page - STMicroelectronics

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May 2002
s
1
µA 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
0.1
µF EXTERNAL CAPACITORS
s
MEET EIA/TIA-232 SPECIFICATIONS DOWN
TO 3V
s
AVAILABLE IN SO-28, SSOP-28 AND
TSSOP28
DESCRIPTION
The ST3243 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.
The receiver R2 is always active to implement a
wake-up feature for serial port.
The
ST3243
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.
The Auto-powerdown feature functions when
FORCEON is low and FORCEOFF is high. During
this mode of operation, if the device does not
sense a valid RS-232 signal, the driver outputs are
disabled. If FORCEOFF is set low, both drivers
and receivers (expert R2B) are shut off, and
supply current is reduced to 1mA. Disconnecting
the serial port or turning off the peripheral drives
causes the auto-powerdown condition to occur.
Auto-powerdown
can
be
disabled
when
FORCEON and FORCEOFF are high, and should
be done when driving a serial mouse. With
Auto-powerdown enabled, the device is activated
automatically when a valid signal is applied to any
receiver input.
Typical application are in notebook, subnotebook,
palmtop computers, battery-powered equipment,
hand-held equipment, peripherals and printers.
ST3243
3 TO 5.5V, 400KBPS, RS-232
TRANSCEIVER WITH AUTO-POWERDOWN
SSOP
SOP
TSSOP


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