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ADM489A: 5 V, Slew-Rate Limited, Low Power, 250 kbps, Full Duplex EIA RS-485 Transceiver (with DE/RE)

The ADM488A and ADM489A are low power, differential line transceivers suitable for communication on multipoint bus transmission lines. They are intended for balanced data transmission and comply with both RS-485 and RS-422 standards of the Electronics Industries Association (EIA). Both products contain a single differential line driver and a single differential line receiver, making them suitable for full-duplex data transfer. The ADM489A contains an additional receiver and driver enable control.The input impedance is 12 kΩ, allowing 32 transceivers to be connected on the bus. The ADM488A/ADM489A operate from a single 5 V ± 10% power supply.

Excessive power dissipation that is caused by bus contention or output shorting is prevented by a thermal shutdown circuit. This feature forces the driver output into a high impedance state if, during fault conditions, a significant temperature increase is detected in the internal driver circuitry. The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).The ADM488A/ADM489A are fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.The ADM488A/ADM489A are fully specified over the industrial temperature range and are available in SOIC and MSOP packages.

技术特性 Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E) 250 kbps data rate Single 5 V ± 10% supply −7 V to +12 V bus common-mode range Connect up to 32 nodes on the bus Reduced slew rate for low EM interference Short-circuit protection 30 μA supply current

技术指标 Min Positive Supply (V): +4.5V Pwr Supply (Vnom): +5 Full-Half Duplex: Full Data Rate RS-485: 250kbps # of Nodes On Bus: 32 Drvr/Rcvr Enable: Yes Protocols: RS-422,RS-485

订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs	RoHS
ADM489ABRMZ 产品状态: 量产		10	工业	Tube, 50	$ 1.29	$ 1.10	Y 材料信息
ADM489ABRMZ-REEL7 产品状态: 量产		10	工业	Reel, 1000	-	$ 1.10	Y 材料信息
ADM489ABRZ 产品状态: 量产		14	工业	Tube, 56	$ 1.24	$ 1.05	Y 材料信息
ADM489ABRZ-REEL7 产品状态: 量产		14	工业	Reel, 1000	-	$ 1.05	Y 材料信息

ADM489A 应用技术支持与电子电路设计开发资源下载

1. ADM489A 数据手册DataSheet 下载 Rev A, 11/2010 (pdf 281kB). pdf
2. ADI 模拟器件公司比较器产品选型指南 . pdf
3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf