AD7306AR

Overview

The AD7306AR is a monolithic RS-232/RS-422 transceiver operating from a single +5 V supply. It integrates two RS-232 drivers, one RS-422 driver, one RS-232 receiver, and one configurable receiver. The internal charge pump generates ±10 V levels using four 0.1 μF capacitors. RS-232 data rates reach 100 kHz, while RS-422 supports up to 5 MHz. Supply current is typically 15 mA at VCC = +5 V.

Feature Summary

• Integrates RS-232 and RS-422 interfaces on a single chip
• Internal charge pump enables operation from a single +5 V supply
• Configurable receiver path selectable via the 232/422 SEL pin
• Output short circuit protection with active current limiting

Applications

• DTE-DCE Interface
• Packet Switching
• Local Area Networks
• Data Concentration
• Integrated Services Digital Network (ISDN)

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm package type and temperature range. The 'A' suffix denotes industrial temperature operation (-40°C to +85°C). Confirm RoHS compliance status if required by the design specification. Cross-reference the datasheet revision to ensure all electrical parameters match the intended application requirements.

Selection Notes

Select this component when both RS-232 and RS-422 protocols are required within a single interface block. The device eliminates the need for external bipolar power supplies through its integrated charge pump. Ensure the system timing allows for the typical 200 μs generator rise time after power-up before initiating transmission.

Part Context

The AD7306 series provides a unified solution for mixed protocol communication systems. The AD7306AR variant specifically utilizes a 24-lead Standard Small Outline Package (SOIC) with an industrial temperature rating. This family simplifies board layout by reducing component count compared to discrete solutions.

Replacement Considerations

Direct functional replacements include other Analog Devices parts within the AD7306 series, such as the AD7306ANZ or AD7306ARZ. Verify that substitute packages maintain compatibility with existing PCB footprints and that thermal performance meets the system's dissipation requirements.