Members of the Texas Instruments

Widebus Family

Inputs Are TTL-Voltage Compatible

3-State Bus-Driving True Outputs

Flow-Through Architecture Optimizes

PCB Layout

Distributed Center-Pin VCC and GND

Configurations Minimize High-Speed

Switching Noise

EPIC (Enhanced-Performance Implanted

CMOS) 1-
m 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 SN54ACT16374 and 74ACT16374 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 set up at the data (D) inputs.

An output-enable input (OE) 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 provides 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 flip-flop. Old

data can be retained or new data can be entered while the outputs are in the high-impedance state.

The 74ACT16374 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 SN54ACT16374 is characterized for operation over the full military temperature range of –55°C to 125°C.

The 74ACT16374 is characterized for operation from –40°C to 85°C.