ADM236LJNZ

Overview

The ADM236LJNZ is a single-supply CMOS RS-232 transceiver from Analog Devices, designed for EIA-232-E and V.28 interfaces without requiring external ±12 V supplies. It integrates four drivers and three receivers within a 24-pin package. The device operates on a single +5 V supply, utilizing internal charge pumps to generate the necessary voltage levels. Key electrical parameters include a data rate of 120 kbps, an output voltage swing of ±9 V, and receiver input protection up to ±30 V. It features low power shutdown capability with current consumption ≤1 µA, alongside TTL/CMOS-compatible inputs and outputs.

Feature Summary

• Integrates dual internal DC-to-DC converters to enable operation from a single 5 V supply
• Includes dedicated Shutdown (SD) and Enable (EN) control pins for power management and bus sharing
• Features Schmitt trigger receivers with hysteresis to ensure noise immunity during signal reception
• Provides built-in protection against electrostatic discharge and overvoltage conditions on receiver inputs

Applications

• Battery-powered portable equipment requiring low standby power
• Industrial instruments and measurement devices
• Computer peripherals and serial communication ports
• Modems and printers interfacing with microprocessor systems

Procurement Notes

Verify that the ordering suffix JNZ corresponds to the specific commercial temperature range and RoHS-compliant packaging configuration required for your design. Confirm pinout compatibility if replacing legacy components, as the 24-pin layout differs from smaller packages in the same family. Ensure the supplier provides documentation confirming the component meets the specified EIA-232-E standards.

Selection Notes

Select this component when a system requires multiple transmitter and receiver channels but lacks a negative voltage rail. The integrated shutdown mode makes it suitable for battery-operated designs where minimizing quiescent current is critical. Consider the 24-pin footprint constraints during PCB layout, as it accommodates four drivers and three receivers compared to simpler two-channel alternatives.

Part Context

The ADM236L belongs to the ADM2xxL family of enhanced RS-232 line drivers and receivers. This series improves upon earlier AD2xx models by offering lower power consumption, faster slew rates, and compatibility with smaller external capacitors. The L-series designation indicates optimized performance for single-supply applications, distinguishing it from parts requiring dual supplies or lacking integrated charge pumps.

Replacement Considerations

The ADM241L serves as a functional substitute within the same family, offering similar capabilities but with five receivers instead of three and a 28-pin package. Designers must account for the additional pin count and potential differences in pin assignments when migrating between these variants.