ADM238LAN

Overview

The ADM238LAN is a CMOS RS-232 transceiver from Analog Devices designed for EIA-232-E and V.28 interfaces using a single 5 V supply. It integrates four drivers and four receivers with on-board DC-to-DC converters generating ±10 V levels. The device supports data rates up to 120 kbps and operates within an industrial temperature range of -40°C to +85°C. It requires four external 1 µF capacitors for charge pump operation, features latch-up-free construction, and provides ±30 V receiver input protection.

Feature Summary

• Integrates internal charge pumps to generate required RS-232 voltage levels from a single 5 V digital supply
• Features Schmitt trigger inputs on receivers to ensure noise immunity and error-free reception
• Includes internal pull-up and pull-down resistors on all driver and receiver inputs
• Provides robust protection against overvoltage conditions on receiver inputs

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific package variant (e.g., CERDIP or PDIP) associated with the LAN suffix by consulting the manufacturer's current ordering guide. Confirm that the component meets the required industrial temperature specifications (-40°C to +85°C) for the intended deployment environment before finalizing procurement.

Selection Notes

Select this component when a full-duplex RS-232 interface with four drivers and four receivers is required under a single 5 V supply constraint. It serves as a direct upgrade to the legacy AD238 family, offering improved power efficiency and compatibility with smaller 1 µF capacitors. Ensure the application does not require a shutdown mode, as this specific part lacks that feature.

Part Context

The ADM238LAN belongs to the ADM2xxL family of line drivers and receivers manufactured by Analog Devices. This series represents an enhanced version of the earlier AD2xx family, characterized by lower power consumption and faster slew rates. The ADM238L specifically provides a symmetric configuration of four drivers and four receivers for comprehensive serial communication needs.

Replacement Considerations

The ADM238LAN is a plug-in upgrade for the AD238. Verify pinout compatibility if replacing older AD238 units. Other members of the ADM2xxL family may offer similar functionality but differ in driver/receiver counts or additional features like shutdown modes.