Operates With Single 5-V Power Supply
Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU Recommendation
V.28
Improved Performance Replacement for
MAX241
Operates at Data Rates up to 100 kbit/s
Over a 3-m Cable
Low-Power Shutdown Mode . . . ≤1 μA Typ
LinBiCMOS Process Technology
Four Drivers and Five Receivers
±30-V Input Levels
3-State TTL/CMOS Receiver Outputs
±9-V Output Swing With a 5-V Supply
Applications
– TIA/EIA-232-F Interface
– Battery-Powered Systems
– Terminals
– Modems
– Computers
Packaged in Plastic Small-Outline Package

description
The SN75LBC241 is a low-power LinBiCMOS line-interface device containing four independent drivers and
five receivers. It is designed as a plug-in replacement for the Maxim MAX241. The SN75LBC241 provides a
capacitive-charge-pump voltage generator to produce RS-232 voltage levels from a 5-V supply. The
charge-pump oscillator frequency is 20 kHz. Each receiver converts RS-232 inputs to 5-V TTL/CMOS levels.
The receivers have a typical threshold of 1.2 V and a typical hysteresis of 0.5 V and can accept ±30-V inputs.
Each driver converts TTL/CMOS input levels into RS-232 levels.
The SN75LBC241 includes a receiver, a 3-state control line, and a low-power shutdown control line. When the
EN line is high, receiver outputs are placed in the high-impedance state. When EN is low, normal operation is
enabled.
The shutdown mode reduces power dissipation to less than 5 μW, typically. In this mode, receiver outputs have
high impedance, driver outputs are turned off, and the charge-pump circuit is turned off. When SHUTDOWN
is high, the shutdown mode is enabled. When SHUTDOWN is low, normal operation is enabled.
This device has been designed to conform to TIA/EIA-232-F and ITU Recommendation V.28.
The SN75LBC241 has been designed using LinBiCMOS technology and cells contained in the
Texas Instruments LinASIC library. Use of LinBiCMOS circuitry increases latch-up immunity in this device
over an all-CMOS design.
The SN75LBC241 is characterized for operation from 0°C to 70°C.