DESCRIPTION

The A3085A is a half-duplex RS-485 transceiver with ±15kV IEC 61000-4-2 contact ESD protection. This device contains one driver and one receiver. The A3085A includes fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be logic high even if all transmitters on a terminated bus are disabled. The A3085A features reduced slew-rate driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission up to 500kbps. The A3085A has a 1/8 unit load receiver input impedance that allows up to 256 transceivers on the bus.

T

he A3085A is available in SOP8 package

FEATURES

? +3.3V or +5V Operation

? True Fail Safe Receiver

? Maximum Data Rate: 500kbps (VCC=5V)

250kbps (V

CC =

? Allow Up to 256 Transceivers on the Bus

? I/O Pins ESD Protection:

±15kV

IEC 61000 4 2, Contact Discharge

? Availa ble in S OP8 package

A PPLICATION

? S mart Meter

? D VR

? RS 485 Communicati ons

? Level Translators

? Transceivers for EMI Sensitive Application s

? Industrial Control Local Area Networks

? Energy Meter Networks

? Lighting Systems