ADM232LAR-REEL

Overview

The ADM232LAR-REEL is a CMOS RS-232 transceiver from the ADM2xxL family, manufactured by Analog Devices Inc. It operates on a single 5 V power supply and supports data rates up to 120 kbps. The device integrates two internal charge pump voltage converters that generate ±10 V levels from the 5 V input, eliminating the need for external dual supplies. It features two drivers and two receivers with full-duplex communication capability. The component requires four external 1 µF capacitors for operation and does not include a low-power shutdown mode.

Feature Summary

• Integrates on-board dc-to-dc converters to generate required RS-232 voltage swings from a single 5 V supply
• Features Schmitt trigger inputs with hysteresis to ensure error-free reception in noisy environments
• Includes internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs
• Provides ±30 V receiver input level protection against overvoltages

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific ordering suffix 'L' indicates the low-power CMOS variant requiring only 1 µF capacitors. Confirm the '-REEL' suffix denotes tape-and-reel packaging suitable for automated assembly processes. Ensure the temperature grade matches the application requirements, as industrial versions are available.

Selection Notes

Select this part when a single 5 V supply is available and no shutdown control is needed. The ADM232L requires four external capacitors; consider the ADM233L if board space is critical due to its internal capacitor configuration. Verify that the 120 kbps data rate meets system timing constraints.

Part Context

The ADM232L is an enhanced upgrade to the legacy AD2xx family, offering lower power consumption and faster slew rates. It belongs to the ADM2xxL series designed for EIA-232-E and V.28 communications interfaces where 12 V supplies are unavailable. This specific model provides a standard 2-driver, 2-receiver configuration.

Replacement Considerations

ADM232ANZ

FAQ

Does the ADM232L support low-power shutdown?

No, the ADM232L does not feature a low-power shutdown mode. Models such as the ADM236L or ADM241L include this functionality.

What is the maximum data rate supported by the ADM232L?

The ADM232L supports data rates up to 120 kbps.

How many external capacitors are required for the ADM232L?

The ADM232L requires four external 1 µF capacitors to operate the internal charge pump voltage converters.