ADM232LANZ

Overview

The ADM232LANZ is a CMOS RS-232 transceiver from Analog Devices, designed for single 5 V operation. It integrates two drivers and three receivers within a 24-pin PDIP package. The device supports data rates up to 120 kbps and operates with a supply voltage range of 4.75 V to 5.25 V. Internal charge pumps generate the required ±10 V levels using four external 1 µF capacitors. The part draws 13 mA of quiescent current and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates internal DC-to-DC converters to enable full RS-232 functionality from a single 5 V power source.
• Features Schmitt trigger inputs on receivers to provide noise immunity and error-free reception in noisy environments.
• Includes internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs to define logic states when unconnected.

Applications

• Industrial control systems requiring robust serial communication
• Embedded computer peripherals and instrumentation interfaces
• Battery-powered equipment where space-saving integration is critical

Procurement Notes

Verify the specific suffix 'L' against the manufacturer's ordering guide to confirm the exact pinout and electrical characteristics. Ensure that the procurement channel provides documentation confirming compliance with the EIA-232-E standard. Cross-reference the component marking with the official datasheet revision history to validate authenticity and production batch details.

Selection Notes

Select this component when a design requires five driver outputs but only three receiver channels. Verify that the application does not require a low-power shutdown mode, as this variant lacks the SD pin found in the ADM236L. Confirm that the PCB layout can accommodate the necessary four external capacitors for the internal charge pump circuitry.

Part Context

This component belongs to the ADM2xxL family of enhanced CMOS RS-232 transceivers. It serves as a specialized variant within the series, offering a unique combination of five drivers and three receivers. Unlike the ADM236L, it omits the shutdown feature to simplify control logic while maintaining high-speed data transmission capabilities.

Replacement Considerations

The ADM238LANZ offers a symmetric configuration with four drivers and four receivers. For designs requiring power management, the ADM236LANZ provides equivalent functionality with added shutdown and enable controls.