AD7306JRZ

Overview

The AD7306JRZ is a +5 V powered RS-232/RS-422 transceiver in a 24-lead SOIC package. It integrates two RS-232 drivers, one RS-422 driver, one RS-232 receiver, and one configurable receiver path. The internal charge pump generates ±9 V from a single +5 V supply using four 0.1 μF capacitors. RS-232 channels support up to 100 kHz, while RS-422 channels operate up to 5 MHz with low skew. Operating temperature range is 0°C to +70°C.

Feature Summary

• Integrates dual RS-232 and single RS-422 interfaces on one chip
• Internal charge pump enables operation from a single +5 V supply
• Configurable receiver path selectable between RS-232 and RS-422 modes
• High-speed RS-422 operation with closely matched complementary outputs

Applications

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

Procurement Notes

Verify the specific suffix 'JRZ' corresponds to the commercial temperature range (0°C to +70°C) and the 24-lead Standard Small Outline Package (RW-24). Confirm RoHS compliance status as indicated by the 'Z' suffix in official Analog Devices documentation. Ensure the source document explicitly lists this part number to avoid confusion with the industrial grade 'ARZ' variant or non-compliant versions.

Selection Notes

Select this component when a single-chip solution for mixed RS-232 and RS-422 communication is required. It is suitable for applications needing high-speed differential transmission alongside standard single-ended links. The internal charge pump eliminates the need for external bipolar supplies, simplifying board layout. Verify that the 0°C to +70°C commercial temperature range meets the system environmental requirements.

Part Context

The AD7306 series provides a monolithic interface between TTL signal levels and EIA RS-232/RS-422 standards. The JRZ variant specifically denotes the commercial temperature version housed in a surface-mount SOIC package. This family allows designers to consolidate multiple interface functions into a single footprint, reducing component count compared to discrete solutions.

Replacement Considerations

Public confirmed substitutes include the AD7306ANZ for industrial temperature ranges in DIP packages, and the AD7306ARZ for industrial temperature ranges in SOIC packages. Verify pin compatibility and electrical specifications before substitution.

FAQ

What capacitor values are required for the internal charge pump?

Four 0.1 μF capacitors are required for the charge pump voltage generator. These can be either polarized or non-polarized types.

How is the receiver input mode configured?

The receiver input mode is configured using the 232/422 SEL pin. A Logic 1 selects RS-232 operation, while a Logic 0 selects RS-422 operation.

What is the maximum data rate for the RS-422 channel?

The RS-422 channel supports high-speed communications up to 5 MHz.