特点
ESD Protection Over ±10kV
3V Logic Interface
Uses Small Capacitors: 0.1μF, 0.2μF
1μA Supply Current in Shutdown
Low Power Driver Disable Operating Mode
Pin Compatible with LT1137A
120kBaud Operation for R
L
= 3k, C
L
= 2500pF
250kBaud Operation for R
L
= 3k, C
L
= 1000pF
CMOS Comparable Low Power: 60mW
Easy PC Layout: Flowthrough Architecture
Rugged Bipolar Design
Outputs Assume a High Impedance State When Off or Powered Down
Absolutely No Latch-Up
典型应用
典型应用
描述
描述 The LT?1342 is an advanced low power three-driver, five-receiver RS232 transceiver. The LT1342 operates from a 5V supply and a 3V logic supply. Receiver outputs can interface directly to 3V logic circuits. Included on the chip is a shutdown pin for reducing supply current to near zero. All receivers and drivers assume high impedance states during shutdown. The driver disable function provides additional control of operating mode. When driver disable is high the charge pump and drivers turn off. Receivers continue to operate during driver disable. New ESD structures on the chip allow the LT1342 to survive multiple ±10kV strikes, eliminating the need for costly TransZorbs? on the RS232 line pins. The LT1342 is fully compliant with all EIA RS232 specifications and operates in excess of 120kbaud even driving heavy capacitive loads.