Data Sheet

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MM74HC164 — 8-Bit Serial-in/Parallel-out Shift Register

MM74HC164 Rev. 1.5.0

February 2008

MM74HC164

8-Bit Serial-in/Parallel-out Shift Register

Features

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Typical operating frequency: 50MHz

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Typical propagation delay: 19ns (clock to Q)

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Wide operating supply voltage range: 2V to 6V

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Low input current: 1µA maximum

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Low quiescent supply current: 80µA maximum

(74HC Series)

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Fanout of 10 LS-TTL loads

General Description

The MM74HC164 utilizes advanced silicon-gate CMOS

technology. It has the high noise immunity and low con-

sumption of standard CMOS integrated circuits. It also

offers speeds comparable to low power Schottky

devices.

This 8-bit shift register has gated serial inputs and

CLEAR. Each register bit is a D-type master/slave flip-

flop. Inputs A & B permit complete control over the

incoming data. A LOW at either or both inputs inhibits

entry of new data and resets the first flip-flop to the low

level at the next clock pulse. A high level on one input

enables the other input which will then determine the

state of the first flip-flop. Data at the serial inputs may be

changed while the clock is HIGH or LOW, but only infor-

mation meeting the setup and hold time requirements

will be entered. Data is serially shifted in and out of the

8-bit register during the positive going transition of the

clock pulse. Clear is independent of the clock and

accomplished by a low level at the CLEAR input.

The 74HC logic family is functionally as well as pin-out

compatible with the standard 74LS logic family. All inputs

are protected from damage due to static discharge by

internal diode clamps to V

and ground.

Ordering Information

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.

All packages are lead free per JEDEC: J-STD-020B standard.

Order Number

Package

Number Package Description

MM74HC164M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150"

Narrow

MM74HC164MTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,

4.4mm Wide

MM74HC164N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide