Members of the Texas Instruments

WidebusE Family

3-State True Outputs

Full Parallel Access for Loading

Flow-Through Architecture Optimizes

PCB Layout

Distributed VCC and GND Pin Configuration

Minimizes High-Speed Switching Noise

EPICE (Enhanced-Performance Implanted

CMOS) 1-mm Process

500-mA Typical Latch-Up Immunity at

125°C

Package Options Include Plastic 300-mil

Shrink Small-Outline (DL) 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 ’AC16373 are 16-bit transparent D-type

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. The 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 a 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 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.

The 74AC16373 is packaged in TI’s shrink small-outline package (DL), which provides twice the I/O pin count

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

The 54AC16373 is characterized for operation over the full military temperature range of –55°C to 125°C. The

74AC16373 is characterized for operation from –40°C to 85°C.