CD4508B中文资料CMOS 双路 4 位锁存器数据手册TI规格书

描述 Description

CD4508B dual 4-bit latch contains two identical 4-bit latches with separate STROBE, RESET, and OUTPUT DISABLE control. With the STROBE line in the high state, the data on the \"D\" inputs appear at the corresponding \"Q\" outputs provided the DISABLE line is in the low state. Changing the STROBE line to the low state locks the data into the latch. A high on the reset line forces the outputs to a low level regardless of the state of the STROBE input. The outputs are forced to the high-impedance state for bus line applications by a high level on the DISABLE input.

The CD4508B types are supplied in 24-lead hermetic dual-in-line ceramic packages (F3A suffix), 24-lead dual-in-line plastic packages (E suffix), 24-lead small-outline packages (M, M96, and NSR suffixes), and 24-lead thin shrink small-outline packages (PW and PWR suffixes).

The CD4508B is similar to industry type MC14508.

特性 Features

• Two independent 4-bit latches
• 3-state outputs with high-impedance state for bus line applications
• 100% tested for quiescent current at 20 V
• Standardized, symmetrical output characteristics
• Noise margin (full package-temperature range) =         1 V at VDD = 5 V         2 V at VDD = 10 V      2.5 V at VDD = 15 V
• Applications:
• Holding registers
• Data storage and multiplexing

简介

CD4508B属于集成电路（IC）的锁存器。由TI制造生产的CD4508B锁存器锁存器是类似于触发器的基本数字存储设备，但是不同之处在于，在锁存使能（或类似命名）信号处于有效逻辑状态的任何时间，保持的逻辑状态都可以改变。“透明”锁存器还允许设备输出在锁存使能信号有效时反映输入的当前状态，而相反的是，状态仅在保持状态已固定时改变。