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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.