Members of the Texas Instruments

WidebusE Family

EPICE (Enhanced-Performance Implanted

CMOS) Process

Operating Range 2-V to 5.5-V VCC

3-State Outputs Drive Bus Lines Directly

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 ’AHC16374 devices are 16-bit

edge-triggered D-type flip-flops 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 flip-flops or one 16-bit flip-flop. On the positive transition of the clock

(CLK) input, the Q outputs of the flip-flop take on the logic levels at the data (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 flip-flop. Old data can be retained or new data can be entered while

the outputs are in the high-impedance state.

The SN54AHC16374 is characterized for operation over the full military temperature range of –55°C to 125°C.

The SN74AHC16374 is characterized for operation from –40°C to 85°C.