ADM1485JNZ

Overview

The ADM1485JNZ is a single half-duplex RS-485 transceiver manufactured by Analog Devices Inc. It operates from a single 5 V power supply and supports data rates up to 30 Mbps. The device features a driver propagation delay of 10 ns and a receiver propagation delay of 15 ns. It accommodates a bus common-mode voltage range from –7 V to +12 V. The component includes thermal shutdown protection and short-circuit protection. It is housed in an 8-Lead Plastic Dual In-Line (PDIP) package and functions within a commercial temperature range of 0°C to 70°C.

Feature Summary

• BiCMOS fabrication process for high-speed switching with low power consumption
• Thermal shutdown circuitry prevents damage during excessive power dissipation or fault conditions
• Fail-safe receiver design ensures a logic high output state when inputs are unconnected
• High output impedance when disabled minimizes bus loading effects

Applications

• Low Power RS-485 Systems
• DTE-DCE Interface
• Packet Switching
• Local Area Networks
• Data Concentration

Procurement Notes

Verify the specific ordering suffix JNZ confirms the PDIP-8 package and commercial temperature range. Confirm RoHS compliance status through official manufacturer documentation. Ensure the source document matches the REV F datasheet specifications. Validate that the component is sourced directly from authorized distributors to avoid counterfeit parts.

Selection Notes

Select this component for multipoint bus transmission lines requiring bidirectional data communication. It serves as a superior upgrade for LTC1485 applications. Ensure the system design limits enabled drivers to one at any time to prevent bus contention. Verify that the load impedance requirements align with RS-485 standards for proper signal integrity.

Part Context

The ADM1485 belongs to the ADM1485 series of EIA RS-485 transceivers. The JNZ suffix specifically denotes the 8-Lead PDIP package variant designed for commercial temperature operation. Other variants include SOIC and MSOP packages with different temperature ratings. This part is suitable for balanced data transmission compliant with RS-485 and RS-422 standards.

Replacement Considerations

The datasheet identifies the ADM1485 as a superior upgrade for the LTC1485. No other direct substitute part numbers are explicitly listed in the provided documentation.