ADM237LJN

Overview

The ADM237LJN is a CMOS RS-232 transceiver from the ADM2xxL family, designed for EIA-232-E and V.28 interfaces using a single 5 V supply. It integrates five drivers and three receivers within a 24-pin PDIP package. The device operates at data rates up to 120 kbps with ±9 V output swings generated by internal charge pumps. It requires four external 1 µF capacitors and lacks low power shutdown or enable functions. Operating temperatures range from -40°C to +85°C.

Feature Summary

• Integrates five TTL/CMOS-to-RS-232 drivers and three RS-232-to-TTL/CMOS receivers on a single chip.
• Generates required ±10 V internal supplies from a single 5 V input using switched capacitor voltage converters.
• Features Schmitt trigger inputs on receivers to ensure noise immunity and error-free reception.
• Includes internal pull-up resistors on driver inputs and pull-down resistors on receiver inputs.

Applications

• Computers
• Peripherals
• Modems

Procurement Notes

Verify the specific suffix 'J' indicates the industrial temperature grade (-40°C to +85°C) as defined in the manufacturer's ordering guide. Confirm the 'N' designation corresponds to the plastic dual in-line package. Ensure the component meets RoHS compliance requirements before procurement.

Selection Notes

Select this part when five independent transmit channels are required alongside three receive channels. It is suitable for applications needing high slew rates without external components. Verify that the absence of a shutdown pin does not conflict with system power management strategies.

Part Context

This component belongs to the ADM2xxL enhanced series, which improves upon the legacy AD2xx family through lower power consumption and faster slew rates. The ADM237L variant specifically provides a 5-driver configuration, distinguishing it from peers like the ADM236L which includes shutdown capabilities.

Replacement Considerations

Public confirmed substitute part numbers: MAX237CNG+, MAX237ENG+.

FAQ

Does the ADM237LJN include a low power shutdown mode?

No, the ADM237L does not feature a shutdown (SD) or enable (EN) pin; these functions are reserved for other members of the family such as the ADM236L and ADM241L.

What is the maximum data rate supported by this device?

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