LT1237 Datasheet | Linear Technology

LT1237 5V RS232 Transceiver with Advanced Power Management and One Receiver Active in Shutdown Features s s s s s s s s s s s s s DESCRIPTIO s s One Receiver Remains Active While in Shutdown ESD Protection over ±15k V Uses Small Capacitors: 0.1µF, 0.2µF, 1.0µF 60µA Supply Current in Shutdown Pin patible with LT1137A 120k Baud Operation for RL = 3k, CL = 2500p F 250k Baud Operation for RL = 3k, CL = 1000p F Operates to 120k Baud CMOS parable Low Power 30m W Operates from a Single 5V Supply Easy PC Layout- Flowthrough Architecture Rugged Bipolar Design Outputs Assume a High Impedance State When Off or Powered Down Absolutely No Latchup Available in SO and SSOP Packages The LT®1237 is an advanced low power three driver, five receiver RS232 transceiver. Included on the chip is a shutdown pin for reducing supply current near zero. During shutdown one receiver remains active to detect ining RS232 signals, for example, to wake up a system. The LT1237 is fully pliant with all EIA RS232 specifications. New ESD structures on the chip allow the LT1237 to survive multiple ±15k V strikes, eliminating the need for costly Trans Zorbs® on the RS232 line pins. The LT1237 operates in excess of 120kbaud even driving heavy capacitive loads. Two shutdown modes allow the driver outputs to be shut down separately from the receivers for more versatile control of the RS232 interface. During shutdown, drivers and receivers assume a high impedance state. , LTC and LT are registered trademarks of Linear Technology Corporation. Trans Zorb is a registered trademark of General Instruments, GSI U APPLICATIO S s s Notebook puters Palmtop puters TYPICAL APPLICATIO V+ 1.0µF 2 × 0.1µF DRIVER 1 OUT RX1 IN DRIVER 2 OUT TO LINE RX2 IN RX3 IN RX4 IN DRIVER 3 OUT RX5 IN (LOW-Q) ON/OFF 5V VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 LT1237 28 27 26 25 24 23 22 21 20 19 18 17 16 15 V- 2 × 0.1µF DRIVER 1 IN RX1 OUT DRIVER 2 IN RX2 OUT RX3 OUT RX4 OUT DRIVER 3 IN RX5 OUT (LOW-Q) GND DRIVER DISABLE...