ST3243BPR ,3 TO 5.5V 400KBPS, RS-232 TRANSCEIVER WITH AUTO-POWERDOWNELECTRICAL CHARACTERISTICS (C - C = 0.1μF, V = 3V to 5.5V, T = -40 to 85°C, unless otherwise specif ..
ST3243BTR ,3 TO 5.5V 400KBPS, RS-232 TRANSCEIVER WITH AUTO-POWERDOWNABSOLUTE MAXIMUM RATINGS Symbol Parameter Value UnitV Supply Voltage-0.3 to 6 VCCDoubled Voltage ..
ST3243C ,3 TO 5.5V 400KBPS, RS-232 TRANSCEIVER WITH AUTO-POWERDOWNST32433 TO 5.5V, 400KBPS, RS-232TRANSCEIVER WITH AUTO-POWERDOWN
ST3243BD-ST3243BPR-ST3243BTR-ST3243CD-ST3243CDR-ST3243CPR
3 TO 5.5V 400KBPS, RS-232 TRANSCEIVER WITH AUTO-POWERDOWN
1/11May 2002 1μA SUPPLY CURRENT ACHIEVED WHEN
IN AUTO-POWERDOWN 250Kbps MINIMUM GUARANTEED DATA
RATE GUARANTEED 6V/μs SLEW RATE RANGE GUARANTEED MOUSE DRIVEABILITY 0.1μF EXTERNAL CAPACITORS MEET EIA/TIA-232 SPECIFICATIONS DOWN
TO 3V AVAILABLE IN SO-28, SSOP-28 AND
TSSOP28
DESCRIPTIONThe 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.
ST32433 TO 5.5V, 400KBPS, RS-232
TRANSCEIVER WITH AUTO-POWERDOWN
ST32432/11
ORDERING CODES
PIN DESCRIPTION
ST32433/11
PIN CONFIGURATION
TRUTH TABLE * If the part is in auto-powerdown mode (FORCE OFF = VCC, FORCE ON = GND) it is shutdown , if no valid RS-232 levels are present on
all receiver input
ABSOLUTE MAXIMUM RATINGS 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.
(*) The device doesn’t meet 1KV ESD HBM
ST32434/11
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)
LOGIC INPUT 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)
AUTO-POWERDOWN 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)
ST32435/11
TRANSMITTER 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)
RECEIVER ELECTRICAL CHARACTERISTICS 1 - C4 = 0.1μF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
TIMING CHARACTERISTICS 1 - C4 = 0.1μF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to T = 25°C)
ST32436/11
APPLICATION CIRCUITS
CAPACITANCE VALUE (μF)
