Members of the Texas Instruments

Widebus Family

Inputs Are TTL-Voltage Compatible

3-State Bus Driving True Outputs

Full Parallel Access for Loading

Flow-Through Architecture Optimizes

PCB Layout

Distributed VCC and GND Pin Configuration

Minimizes High-Speed Switching Noise

EPIC (Enhanced-Performance Implanted

CMOS) 1-m Process

500-mA Typical Latch-Up Immunity at

125°C

Package Options Include Shrink

Small-Outline (DL) 300-mil Packages Using

25-mil Center-to-Center Pin Spacings and

380-mil Fine-Pitch Ceramic Flat (WD)

Packages Using 25-mil Center-to-Center

Pin Spacings

description

The SN54ACT16373 and 74ACT16373 are 16-bit

D-type transparent latches with 3-state outputs

designed specifically for driving highly capacitive

or relatively low-impedance loads. They are

particularly suitable for implementing buffer

registers, I/O ports, bidirectional bus drivers, and

working registers. These devices can be used as

two 8-bit latches or one 16-bit latch. The Q outputs

of the latches follow the data (D) inputs if enable

C is taken high. When C 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 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

bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines

in a bus-organized system without need for interface or pullup components.

OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered

while the outputs are in the high-impedance state.

The 74ACT16373 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and

functionality of standard small-outline packages in the same printed-circuit-board area.

The SN54ACT16373 is characterized for operation over the full military temperature range of −55°C to 125°C.

The 74ACT16373 is characterized for operation from −40°C to 85°C.