MC74VHCT139ADT集成电路（IC）的信号开关多路复用器解码器规格书PDF中文资料

MC74VHCT139ADT属于集成电路（IC）的信号开关多路复用器解码器。由安森美半导体公司制造生产的MC74VHCT139ADT信号开关，多路复用器，解码器逻辑型信号开关、多路复用器和编码器 IC 可用于对以数字格式表示数据的电信号进行路由和选择。这些器件与设计用于模拟信号的类似产品有所不同，它们保留的信息表示为两个电状态之一，而不是两个外部界限内的无穷变化量。

Dual 2−to−4 Decoder/Demultiplexer

The MC74VHCT139A is an advanced high speed CMOS 2−to−4 decoder/demultiplexer fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL devices while maintaining CMOS low power dissipation.

When the device is enabled (E = low), it can be used for gating or as a data input for demultiplexing operations. When the enable input is held high, all four outputs are fixed high, independent of other inputs. The internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output.

The device output is compatible with TTL−type input thresholds and the output has a full 5.0 V CMOS level output swing. The input protection circuitry on this device allows overvoltage tolerance on the input, allowing the device to be used as a logic−level translator from 3.0 V CMOS logic to 5.0 V CMOS logic, or from 1.8 V CMOS logic to 3.0 V CMOS logic while operating at the high−voltage power supply

The MC74VHCT139A input structure provides protection when voltages up to 7.0 V are applied, regardless of the supply voltage. This allows the MC74VHCT139A to be used to interface 5.0 V circuits to 3.0 V circuits. The output structures also provide protection when VCC = 0 V. These input and output structures help prevent device destruction caused by supply voltage−input/output voltage mismatch, battery backup, hot insertion, etc.

Features

• High Speed: tPD = 5.0 ns (Typ) at VCC = 5.0 V

• Low Power Dissipation: ICC = 4 μΑ (Max) at TA = 25°C

• TTL−Compatible Inputs: VIL = 0.8 V; VIH = 2.0 V

• Power Down Protection Provided on Inputs and Outputs

• Balanced Propagation Delays

• Designed for 2.0 V to 5.5 V Operating Range

• Low Noise: VOLP = 0.8 V (Max)

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300 mA

• ESD Performance:

Human Body Model > 2000 V;

Machine Model > 200 V

• Chip Complexity: 100 FETs or 25 Equivalent Gates

• Pb−Free Packages are Available*