龍芯世紀專業承接MC34C87P單片機解密服務，我們專業的解密技術團隊整合既有的解密技術資源，將為廣大客戶提供安全可靠、具備極強的經濟價值的IC解密方案。
這里我們提供對單片機MC34C87P的基本性能特征介紹，供客戶及工程師參考借鑒。
The MC34C87 is a quad differential line driver designed for digital data transmission over balanced lines. The MC34C87 meets all the requirements of standard EIA–422–A while retaining the low–power characteristics of CMOS.The MC34C87 accepts TTL or CMOS input levels and translates these to EIA–422–A output level. This part uses special output circuitry that enables the individual drivers to power down without loading down the bus. The MC34C87 also includes special circuitry which will set the outputs to a high impedance mode during power up or down, preventing spurious glitches. Each enable pin controls two drivers.
The MC34C87 is pin compatible with the MC3487.All pins are protected against damage due to electrostatic discharges.
·Maximum Power Supply Current: 3 mA
·2000 V ESD Protection on the Inputs and the Outputs
·TTL/CMOS Input Compatible
·Typical Propagation Delay: 6 ns
·Typical Output Skew: 1 ns
·Meets VO = 6.0 V (and VO = – 0.25 V), VCC = 0 V, IO < 100 µA
Requirement
·Operation from Single 5 V Supply
·High Impedance Mode for Outputs Connected to System Buses
來源：http://www.shandong-china.com