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

ADM202/ADM203

FEATURES

• 120 kB Transmission Rate
• ADM202: Small (0.1 μF) Charge Pump Capacitors
• ADM203: No External Capacitors Required
• Single 5 V Power Supply
• Meets 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
• Low Power BiCMOS: 2.0 mA I_CC
• ±30 V Receiver Input Levels

APPLICATIONS

Computers

Peripherals

Modems

Printers

Instruments

GENERAL DESCRIPTION

The ADM202/ADM203 is a two-channel RS-232 line driver/ receiver pair designed to operate from a single 5 V power supply. A highly efficient on-chip charge pump design permits RS-232 levels to be developed using charge pump capacitors as small as 0.1 µF. The capacitors are internal to the package on the ADM203 so no external capacitors are required. These converters generate ±10 V RS-232 output levels.

The ADM202/ADM203 meets or exceeds the EIA-232-E and V.28 specifications. Fast driver slew rates permit operation up to 120 kB while high-drive currents allow for extended cable lengths.

An epitaxial BiCMOS construction minimizes power consumption to 10 mW and also guards against latch-up. Overvoltage protection is provided allowing the receiver inputs to withstand continuous voltages in excess of ± 30 V. In addition, all pins contain ESD protection to levels greater than 2 kV.

The ADM202 is available in 16-lead DIP and both narrow and wide SOIC packages. The ADM203 is available in a 20-lead DIP package.

ABSOLUTE MAXIMUM RATINGS* (T_A = 25°C unless otherwise noted)

V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V

V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . (VCC – 0.3 V) to +14 V

V– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –14 V

Input Voltages

T_IN . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to (VCC + 0.3 V)

R_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±30 V

Output Voltages

T_OUT . . . . . . . . . . . . . . . . . . . (V+, +0.3 V) to (V–, – 0.3 V)

R_OUT . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to (VCC + 0.3 V)

Short Circuit Duration

T_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous

Power Dissipation

N-16 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470 mW

R-16N SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 mW

R-16W SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mW

N-20 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 890 mW

Thermal Impedance

N-16 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135°C/W

R-16N SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105°C/W

R-16W SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105°C/W

N-20 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125°C/W

Operating Temperature Range

Commercial (J Version) . . . . . . . . . . . . . . . . . . 0°C to 70°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Soldering

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C

ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2000 V

*This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

FUNCTIONAL BLOCK DIAGRAMS

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