CD74HC85中文资料4 位幅度比较器数据手册TI规格书

描述 Description

The ’HC85 and ’HCT85 are high speed magnitude comparators that use silicon-gate CMOS technology to achieve operating speeds similar to LSTTL with the low power consumption of standard CMOS integrated circuits.

These 4-bit devices compare two binary, BCD, or other monotonic codes and present the three possible magnitude results at the outputs (A > B, A < B, and A = B). The 4-bit input words are weighted (A0 to A3 and B0 to B3), where A3 and B3 are the most significant bits.

The devices are expandable without external gating, in both serial and parallel fashion. The upper part of the truth table indicates operation using a single device or devices in a serially expanded application. The parallel expansion scheme is described by the last three entries in the truth table.

特性 Features

• Buffered Inputs and Outputs
• Serial or Parallel Expansion Without External Gating
• Standard Outputs . . . . . . . 10 LSTTL Loads
• Wide Operating Temperature Range . . . –55°C to 125°C
• Significant Power Reduction Compared to LSTTL Logic ICs
• 2V to 6V Operation
• HCT Types
• Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
• CMOS Input Compatibility, Il 1µA at VOL, VOH

Data sheet acquired from Harris Semiconductor

简介

CD74HC85属于集成电路（IC）的比较器。由TI制造生产的CD74HC85比较器逻辑比较器系列产品用于根据以数字格式表示的信息比较结果来生成输出；身份型比较器指示两个输入是否相同，幅度型比较器还指示两个输入不相同时哪个较大。它们不同于比较两个模拟输入幅度的器件，后者称为线性比较器且单独分类。