AD236JR

Overview

The AD236JR is a CMOS RS-232 driver and receiver pair designed for single 5 V power supply operation. It integrates on-board DC-DC converters to generate the required ±10 V swing from the single supply, eliminating the need for external charge pumps or dual supplies. The device meets EIA-232-E and V.28 specifications with a data rate up to 120 kB/s. It features low power shutdown mode consuming less than 5 µW, while maintaining ESD protection greater than 2 kV.

Feature Summary

• Single 5 V power supply operation with integrated DC-DC converters
• Low power shutdown mode reduces dissipation below 5 µW
• Meets EIA-232-E and V.28 communication interface standards
• High ESD protection exceeding 2 kV on receiver inputs

Applications

• Battery-powered portable equipment requiring low standby current
• Industrial instruments with limited board space constraints
• Computer peripheral interfaces needing reliable serial communication
• Modem applications in environments without ±12 V supplies

Procurement Notes

Verify the specific suffix 'JR' indicates the standard plastic DIP package variant when sourcing. Confirm that the component is sourced directly from Analog Devices or authorized distributors to ensure authenticity. Check for RoHS compliance status if environmental regulations apply to the end product. Ensure the operating temperature range matches the system requirements before procurement.

Selection Notes

Select the AD236JR when a single 5 V supply is available but RS-232 voltage levels are required. It is suitable for designs where minimizing external components and PCB area is critical due to its integrated charge pump. Consider this part for battery-operated systems because of its ultra-low shutdown current. Compare against other ADM2xx family members if additional receivers or different pinouts are needed.

Part Context

The AD236JR belongs to the ADM2xx family of line drivers and receivers manufactured by Analog Devices. This family is engineered for EIA-232-E and V.28 interfaces, particularly where traditional dual supplies are unavailable. The series emphasizes low power consumption and compact design through internal voltage conversion, making it a standard solution for modern serial communication interfaces in constrained environments.

FAQ

Does the AD236JR require external capacitors for its internal DC-DC converter?

Yes, small external capacitors are required to support the on-board DC-DC converters, though they are significantly smaller than those needed for discrete charge pump solutions.

What is the maximum data rate supported by the AD236JR?

The AD236JR supports data rates up to 120 kB/s, which is sufficient for most standard asynchronous serial communication applications.

How does the shutdown mode affect the receiver outputs?

In shutdown mode, power dissipation drops below 5 µW. Unlike some variants, the AD236JR typically disables both drivers and receivers during shutdown to minimize current draw.