Members of the Texas Instruments

WidebusE Family

EPICE (Enhanced-Performance Implanted

CMOS) Process

Operating Range 2-V to 5.5-V VCC

Distributed VCC and GND Pins Minimize

High-Speed Switching Noise

Flow-Through Architecture Optimizes PCB

Layout

Latch-Up Performance Exceeds 250 mA Per

JESD 17

ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

Package Options Include Plastic Shrink

Small-Outline (DL), Thin Shrink

Small-Outline (DGG), and Thin Very

Small-Outline (DGV) Packages and 380-mil

Fine-Pitch Ceramic Flat (WD) Package

Using 25-mil Center-to-Center Spacings

description

The ’AHC16373 devices 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.

These devices 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 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 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.

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.

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 SN54AHC16373 is characterized for operation over the full military temperature range of –55°C to 125°C.

The SN74AHC16373 is characterized for operation from –40°C to 85°C.