AD7306JR

Overview

The AD7306JRZ 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
• High-speed RS-422 operation with low timing skew between complementary outputs

Applications

• DTE-DCE interface connections
• Packet switching systems
• Local area networks
• Data concentration units
• Integrated Services Digital Network (ISDN)

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm temperature range and package type. The 'J' designation indicates commercial temperature range (0°C to +70°C), while 'A' denotes industrial range (-40°C to +85°C). Confirm RoHS compliance status based on the final character of the part number. Ensure the selected package matches the PCB footprint requirements.

Selection Notes

Select this component when both RS-232 and RS-422 protocols are required within a single interface circuit. The device eliminates the need for external bipolar power supplies by generating internal voltages. Consider the 232/422 SEL pin functionality if the application requires dynamic configuration of the receiver input stage. Verify that the load capacitance and transmission distance align with the specified slew rate and data rate limits.

Part Context

The AD7306 series provides a unified solution for mixed protocol communication environments. It bridges TTL/CMOS logic levels to dual standard EIA signal levels. The family includes variants in 24-lead SOIC and 24-pin DIP packages. This integration reduces printed circuit board space compared to discrete solutions requiring multiple interface chips.

Replacement Considerations

Direct functional replacements include other Analog Devices RS-232/RS-422 transceivers such as the AD7305 or AD7307, provided pin compatibility and protocol support match the design requirements. Verify that substitute devices offer similar charge pump efficiency and output drive capabilities.