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.