5 V, 0.1
F CMOS RS-232 Drivers / Receivers 200 kB/s Transmission Rate Single 5V Power Supply

High-Speed, 5 V, 0.1 F CMOS RS-232 Drivers/Receivers

ADM222/ADM232A/ADM242

FEATURES

200 kB/s Transmission Rate

Small (0.1 F) Charge Pump Capacitors

Single 5 V Power Supply

Meets All EIA-232-E and V.28 Specifications

Two Drivers and Two Receivers

On-Board DC-DC Converters

9 V Output Swing with 5 V Supply

30 V Receiver Input Levels

Pin Compatible with MAX222/MAX232A/MAX242

APPLICATIONS

Computers

Peripherals

Modems

Printers Instruments

GENERAL DESCRIPTION

The ADM222, ADM232A, ADM242 are a family of high-speed RS-232 line drivers/receivers offering transmission rates up to 200 kB/s. Operating from a single 5 V power supply, a highly efficient on-chip charge pump using small (0.1 µF) external capacitors allows RS-232 bipolar levels to be developed. Two RS-232 drivers and two RS-232 receivers are provided on each device. The devices are fabricated on BiCMOS, an advanced mixed technology process that combines low power CMOS with highspeed bipolar circuitry. This allows for transmission rates up to 200 kB/s, yet minimizes the quiescent power supply current to under 5 mA.

Test Circuits

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