JSM485ESA

JSM485ESA is a transceiver IC for RS485 and RS422 communication systems, supporting data transmission and reception at speeds up to 2Mbps. The JSM485ESA is a half-duplex RS485 interface chip featuring Driver Enable (DE) and Receiver Enable (/RE) control pins. This high-speed transceiver for RS485/RS422 communication integrates one driver and one receiver. The JSM485ESA incorporates a slew-rate-limited driver to minimize EMI and reflections caused by improper cable termination, enabling data transmission at up to 2Mbps.

Applications

• Low-power RS485 & RS422 receiver
• Electric, water, and gas meters
• Level translation
• Access control and security systems
• EMI-resistant transceivers
• Industrial control LAN

Key features

• Tri-state output
• Half-duplex communication
• ESD protection: Contact discharge: ±5KV, Air discharge: ±5KV (HBM)
• A, B terminal short-circuit protection
• SOP8 package
• Receiver designed with 1/4 unit load input impedance, supporting up to 28 loads on the bus
• Receiver with input filtering for improved noise rejection on slowly rising and falling differential signals
• Transceiver receiver with 1/8 unit load input impedance (128KΩ), allowing 128 transceivers connected in parallel on the same bus
• Low slew rate driver reduces EMI and minimizes reflections caused by improperly terminated cables
• Output stage foldback current limiting for fast short-circuit protection across the full common-mode voltage range
• Thermal shutdown circuit forces driver output to high-impedance state when die temperature exceeds the typical value