CD74HC533屬于集成電路（IC）的鎖存器。由美國(guó)德州儀器公司制造生產(chǎn)的CD74HC533鎖存器鎖存器是類似于觸發(fā)器的基本數(shù)字存儲(chǔ)設(shè)備，但是不同之處在于，在鎖存使能（或類似命名）信號(hào)處于有效邏輯狀態(tài)的任何時(shí)間，保持的邏輯狀態(tài)都可以改變?！巴该鳌辨i存器還允許設(shè)備輸出在鎖存使能信號(hào)有效時(shí)反映輸入的當(dāng)前狀態(tài)，而相反的是，狀態(tài)僅在保持狀態(tài)已固定時(shí)改變。

特性 Features

? Common Latch-Enable Control

? Common Three-State Output Enable Control

? Buffered Inputs

? Three-State Outputs

? Bus Line Driving Capacity

? Typical Propagation Delay = 13ns at VCC = 5V,

CL = 15pF, TA = 25oC (Data to Output)

? Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

? Wide Operating Temperature Range . . . -55oC to 125oC

? Balanced Propagation Delay and Transition Times

? Significant Power Reduction Compared to LSTTL

Logic ICs

? HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30% of VCC

at VCC = 5V

? HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1μA at VOL, VOH

描述 Description

The ’HC533, ’HCT533, ’HC563, and CD74HCT563 are

high-speed Octal Transparent Latches manufactured with

silicon gate CMOS technology. They possess the low power

consumption of standard CMOS integrated circuits, as well as

the ability to drive 15 LSTTL devices.

The outputs are transparent to the inputs when the latch

enable (LE) is high. When the latch enable (LE) goes low the

data is latched. The output enable (OE) controls the

three-state outputs. When the output enable (OE) is high the

outputs are in the high impedance state. The latch operation

is independent of the state of the output enable.

The ’HC533 and ’HCT533 are identical in function to the

’HC563 and CD74HCT563 but have different pinouts. The

’HC533 and ’HCT533 are similar to the ’HC373 and ’HCT373;

the latter are non-inverting types.