ADM232LARZ-REEL

Overview

The ADM232LARZ-REEL is a CMOS RS-232 transceiver from the Analog Devices ADM2xxL family, designed for EIA-232-E and V.28 communications interfaces using a single 5 V power supply. It integrates two drivers and two receivers with internal charge pump voltage converters that generate ±10 V supplies from the 5 V input, requiring only four 1 µF external capacitors. The device supports data rates up to 120 kbps and provides ±9 V output swings. It operates within an industrial temperature range of -40°C to +85°C and is housed in a 16-lead SOIC package.

Feature Summary

• Integrates dual DC-to-DC charge pump converters to enable operation from a single 5 V supply without requiring external ±12 V rails.
• Features Schmitt trigger inputs on receivers to ensure noise immunity and error-free reception for signals with slow transition times.
• Includes internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs to define logic states when pins are unconnected.

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific ordering suffix 'AR' corresponds to the industrial temperature grade (-40°C to +85°C) and the 'Z' indicates lead-free status as per the manufacturer's current datasheet. Confirm the '-REEL' designation matches the required tape and reel packaging quantity for production integration.

Selection Notes

Select this component when a full-duplex RS-232 interface is required with minimal external capacitance (1 µF). It is suitable for designs constrained by space or where generating high voltages from a standard 5 V digital logic supply is necessary. Ensure the application does not require a low-power shutdown mode, as this specific part lacks that feature.

Part Context

This component belongs to the ADM2xxL enhanced series, which improves upon the legacy AD2xx family by offering lower power consumption, faster slew rates, and compatibility with smaller 1 µF capacitors. The ADM232L variant specifically provides a balanced configuration of two drivers and two receivers for standard bidirectional serial communication.

Replacement Considerations

ADM232ARZ-REEL

FAQ

Does the ADM232LARZ-REEL include a low power shutdown mode?

No, the ADM232L does not feature a shutdown pin. Parts such as the ADM236L or ADM241L must be selected if low power shutdown capability is required.

What is the maximum data rate supported by this transceiver?

The device supports data rates up to 120 kbps while maintaining compliance with EIA-232-E specifications.

How many external capacitors are required for operation?

Four external 1 µF capacitors are required to support the internal charge pump voltage converters for the positive and negative supply generation.