BL3085E Datasheet | BELLING

Description The BL3085E is a +/- 15k V electrostatic discharge (ESD) protected, high-speed transceiver for RS-485 munication that contain one driver and one receiver. The device features 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 BL3085E features reduced slew-rate driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission up to 500kbps. All transmitter outputs and receiver inputs are protected to +/- 15k V using the Human Body Model. The transceiver typically draws 500 micron ampere of supply current when unloaded, or when fully loaded with the driver disabled. All devices have a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The BL3085E is intended for half-duplex munications. Applications - RS-485 munications - Level Translators - Transceivers for EMI-Sensitive Applications - Industrial Control Local Area Networks - Energy Meter Networks - Power Inverters - Building Automation Networks - Telemunications Equipment I/O ESD protection Human Body Model: ±15k V IEC 61000-4-2： Contact discharge: ±15k V Air discharge: ±20k V Page- 1 - .belling..cn V1.0 PIN Configuration BL3085E Pin figure Ordering Information PART BL3085E BL3085E logic figure TEMP RANGE -40℃～+85℃ PIN PACKAGE SOP8 Pin Description BL3085E PIN NAME FUNCTION Receiver Output. When RE is low and if A - B ≧-50m V, RO will be high; if A RO - B ≦-200m V, RO will be low. Receiver Output Enable. Drive RE low to enable RO; RO is high impedance 2 RE when RE is high. Drive RE high and DE low to enter low-power shutdown mode. Driver Output Enable. Drive DE high to enable driver outputs. These outputs 3 DE are high impedance when DE is low. Drive RE high and DE low to enter low-power shutdown mode. Driver...