ADM237LARZ-REEL

Overview

The ADM237LARZ-REEL 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 two internal charge pump converters to generate ±10 V levels, requiring only four 1 µF external capacitors. The device provides five drivers and three receivers with full duplex operation at data rates up to 120 kbps. It operates within a temperature range of -40°C to +85°C and features Schmitt trigger inputs with 0.65 V hysteresis for noise immunity. The part lacks shutdown or enable control pins.

Feature Summary

• Integrates dual charge pumps for single-supply operation
• Includes Schmitt trigger receiver inputs for noise rejection
• Features internal pull-up and pull-down resistors on logic inputs

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the L suffix corresponds to the industrial temperature grade (-40°C to +85°C) and the ARZ suffix denotes the SOIC-24 package with RoHS compliance. Cross-reference the manufacturer's ordering guide to ensure the specific reel quantity matches project requirements.

Selection Notes

Select this component when five transmitter channels and three receiver channels are required in a single package. It is suitable for designs constrained by space due to its small capacitor requirements. Ensure the application does not require low-power shutdown modes, as this variant lacks SD and EN pins. Verify that the 120 kbps speed meets system timing constraints.

Part Context

This part belongs to the ADM2xxL family, which serves as an enhanced upgrade to the AD2xx series. It offers lower power consumption and faster slew rates compared to predecessors. The ADM237L specifically differentiates itself within the family by providing an asymmetric configuration of five drivers and three receivers, unlike the symmetric ADM238L.

Replacement Considerations

Publicly confirmed substitutes include the ADM237LANZ (PDIP package) and ADM237LJNZ (PDIP package). These parts share identical electrical specifications but differ in physical package type. No other direct pin-compatible replacements are documented in the provided datasheet.