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.