ADM3491AR-1REEL7

Drivers, Receivers, Transceivers Overview

The ADM3491AR-1REEL7 is a low-power, full-duplex differential line transceiver designed for single 3.3 V supply operation. It complies with EIA RS-422 and RS-485 standards, supporting data rates up to 20 Mbps. The device features an input impedance of 19 kΩ, allowing up to 50 transceivers on the bus. Key electrical parameters include a typical supply current of 840 μA and a shutdown current of 2 nA. It operates over an industrial temperature range of -40°C to +85°C and is housed in a 14-lead Narrow Body Small Outline (SOIC) package.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex communication capability with dedicated driver and receiver channels
• High-speed data transmission up to 20 Mbps with low power consumption
• Integrated thermal shutdown protection against excessive power dissipation
• Fail-safe receiver design ensuring logic high output when inputs are floating

Drivers, Receivers, Transceivers Applications

• Telecommunications equipment
• DTE-DCE interface connections
• Industrial control systems
• Local area networks (LAN)
• Packet switching and data concentration units

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix '-1REEL7' corresponds to the 14-lead SOIC package with a reel quantity of 1,000 units as listed in the official Analog Devices Ordering Guide. Confirm RoHS compliance status via the 'Z' suffix if required, noting that the base model may differ in environmental certification. Cross-reference the manufacturer part number with distributor catalogs to ensure accurate stock identification and avoid confusion with similar ADM3491 variants.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex RS-485/RS-422 communication at speeds up to 20 Mbps. The 19 kΩ input impedance supports larger network topologies with up to 50 nodes. Ensure the design accommodates the 3.3 V supply voltage and utilizes the shutdown mode for power-sensitive scenarios. Verify that the 14-lead SOIC package fits the PCB layout constraints and thermal requirements of the target enclosure.

Drivers, Receivers, Transceivers Part Context

This device belongs to the ADM3491 family of low-power differential transceivers from Analog Devices. It serves as an upgrade path for legacy parts like the MAX3491 and SN75ALS180. The series includes half-duplex variants such as the ADM3483 and ADM3485, which operate at lower data rates. The ADM3491-1 specifically targets high-speed, full-duplex applications requiring robust noise immunity and low standby power.

Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed direct replacements include the ADM3491ARZ-1REEL7 for RoHS-compliant sourcing. Legacy equivalents such as the MAX3491 and SN75ALS180 are noted as compatible upgrades but require verification of pinout and electrical parameter alignment before substitution.