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.