CY74FCT2373T中文资料具有三态输出和串联阻尼电阻的八路 D 类透明锁存器数据手册TI规格书

描述 Description

The CY74FCT2373T is an 8-bit, high-speed CMOS, TTL-compatible buffered latch with 3-state outputs that is ideal for driving high-capacitance loads, such as memory and address buffers. On-chip 25- termination resistors at the outputs reduce system noise caused by reflections. The CY74FCT2373T can replace the CY74FCT373T to reduce noise in an existing design. When the latch-enable (LE) input is high, the flip-flops appear transparent to the data. Data that meets the required setup times are latched when LE transitions from high to low. Data appears on the bus when the output-enable (OE\\) input is low. When OE\\ is high, the bus output is in the high-impedance state. In this mode, data can be entered into the latches. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

特性 Features

• Function and Pinout Compatible With the Fastest Bipolar Logic
• Reduced VOH (Typically = 3.3 V) Version of Equivalent FCT Functions
• Ioff Supports Partial-Power-Down Mode Operation
• 3-State Outputs
• 200-V Machine Model (A115-A)
• Fully Compatible With TTL Input and Output Logic Levels
• 12-mA Output Sink Current 15-mA Output Source Current

简介

CY74FCT2373T属于集成电路（IC）的锁存器。由TI制造生产的CY74FCT2373T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。