ADM232LJNZ

Overview

The ADM232LJNZ is a CMOS RS-232 transceiver from the ADM2xxL family, designed for EIA-232-E and V.28 communications interfaces using a single 5 V power supply. It integrates two drivers and two receivers with on-board dc-to-dc converters that generate ±10 V levels from the 5 V input. The device supports data rates up to 120 kbps and utilizes small 1 µF external capacitors. It operates within an industrial temperature range of -40°C to +85°C and is housed in a 16-pin PDIP package.

Feature Summary

• Integrates internal charge pump voltage converters to operate from a single 5 V supply without requiring external ±12 V sources.
• Features Schmitt trigger inputs on receivers to ensure noise immunity and error-free reception for signals with slow transition times.
• Includes internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs to define logic states when unconnected.
• Provides latch-up free construction and protects receiver inputs against overvoltages up to ±30 V.

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the J suffix indicates the commercial temperature grade (0°C to 70°C) or confirm if the specific part number corresponds to the industrial grade (-40°C to +85°C) as defined in the ordering guide. Ensure the datasheet revision matches the component batch. Confirm the package type aligns with the required PCB footprint before procurement.

Selection Notes

Select this component when a single 5 V supply is available and space-saving with minimal external capacitance is required. It serves as an enhanced upgrade to the AD2xx family with lower power consumption and faster slew rates. Verify that the 120 kbps data rate meets system requirements and that the 16-pin PDIP package fits the design constraints.

Part Context

The ADM232LJNZ belongs to the ADM2xxL family of line drivers and receivers. This family represents an enhanced upgrade to the older AD2xx series, offering improved performance characteristics such as reduced power dissipation and higher speed capabilities while maintaining compatibility with standard RS-232 specifications.

Replacement Considerations

ADM232LARNZ

FAQ

Does the ADM232LJNZ require external capacitors?

Yes, it requires four external 1 µF capacitors to support the internal charge pump voltage converters.

What is the maximum receiver input voltage?

The receiver inputs can withstand voltages up to ±30 V.

How does the device handle unused transmitter inputs?

Unused transmitter inputs have internal 400 kΩ pull-up resistors that pull them high, forcing the outputs into a low state.