TC74AC166P/F/FN

2007-10-01

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74AC166P,TC74AC166F,TC74AC166FN

8-Bit Shift Register (P-IN, S-OUT)

The TC74AC166 is an advanced high speed CMOS 8-BIT

PARALLEL/SERIAL-IN, SERIAL-OUT SHIFT REGISTER

fabricated with silicon gate and double-layer metal wiring

It achieves the high speed operation similar to equivalent

Bipolar Schottky TTL while maintaining the CMOS low power

dissipation.

It consists of parallel-in or serial-in, serial-out 8-bit shift

register with a gated clock input and an overriding clear input.

The parallel-in or serial-in modes are controlled by the

SHIFT/ LOAD input. When the SHIFT/ LOAD input is held

high, the serial data input is enabled and the eight flip-flops

perform serial shifting on each clock pulse. When held low, the

parallel data inputs are enabled and synchronous loading occurs

on the next clock pulse. Clocking is accomplished on the

low-to-high transition of the clock pulse. The CLOCK-INHIBIT

input should be shifted high only while the CLOCK input is held

high. A direct clear input overrides all other inputs, including the

clock, and sets all the flip-flops to zero. Functional details are

shown in the truth table and the timing charts.

All inputs are equipped with protection circuits against static

discharge or transient excess voltage.

Features

Capability of driving 50

Ω

transmission lines.

• Pin and function compatible with 74HC166

Pin Assignment

Note:

xxxFN (JEDEC SOP) is not available in

Japan.

TC74AC166P

TC74AC166F

TC74AC166FN

Weight

DIP16-P-300-2.54A

: 1.00 g (typ.)

SOP16-P-300-1.27A

: 0.18 g (typ.)

SOL16-P-150-1.27

: 0.13 g (typ.)