特点
One Receiver Remains Active While in Shutdown
ESD Protection over
±15kV
Uses Small Capacitors: 0.1μF, 0.2μF, 1.0μF
60μA Supply Current in Shutdown
Pin-Compatible with LT1137A
120kBaud Operation for R
L
= 3k, C
L
= 2500pF
250kBaud Operation for R
L
= 3k, C
L
= 1000pF
Operates to 120kBaud
CMOS Comparable Low Power 30mW
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
典型应用
典型应用
描述
描述 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 incoming RS232 signals, for example, to wake up a system. The LT1237 is fully compliant with all EIA RS232 specifications. New ESD structures on the chip allow the LT1237 to survive multiple ±15kV strikes, eliminating the need for costly TransZorbs? 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.