SN74ALVCH16373DL集成电路（IC）的锁存器规格书PDF中文资料

SN74ALVCH16373DL属于集成电路（IC）的锁存器。由德州仪器制造生产的SN74ALVCH16373DL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。

FEATURES

· Member of the Texas Instruments Widebus™

Family

· Operates From 1.65 V to 3.6 V

· Max tpd of 3.6 ns at 3.3 V

· ±24-mA Output Drive at 3.3 V

· Bus Hold on Data Inputs Eliminates the Need

for External Pullup/Pulldown Resistors

· Latch-Up Performance Exceeds 250 mA Per

JESD 17

· ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

DESCRIPTION/ORDERING INFORMATION

This 16-bit transparent D-type latch is designed for

1.65-V to 3.6-V VCC operation.

The SN74ALVCH16373 is particularly suitable for

implementing buffer registers, I/O ports, bidirectional

bus drivers, and working registers. This device can

be used as two 8-bit latches or one 16-bit latch.

When the latch-enable (LE) input is high, the Q

outputs follow the data (D) inputs. When LE is taken

low, the Q outputs are latched at the levels set up at

the D inputs.

A buffered output-enable (OE) input can be used to

place the eight outputs in either a normal logic state

(high or low logic levels) or the high-impedance state.

In the high-impedance state, the outputs neither

load nor drive the buslines significantly. The

high-impedance state and the increased drive provide

the capability to drive bus lines without need for

interface or pullup components. OE does not affect

internal operations of the latch. Old data can be

retained or new data can be entered while the

outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors

with the bus-hold circuitry is not recommended.