74HC164

Document number: DS36279 Rev. 2- 2

1 of 10

www.diodes.com

March 2015

© Diodes Incorporated

74HC164

400

8-BIT PARALLEL-OUT SERIAL SHIFT REGISTERS

Description

The 74HC164 is a serial input 8-bit edge-triggered shift register that

has outputs from each of eight stages.

SERIAL DATA INPUT PINS

The serial input data is entered at pin SDA or pin SDB as these are

logically ANDED. Either input could be used as an active HIGH

enable with data entry on the other pin. If a single input is desired, the

pins can be tied together or the unused input can be tied HIGH.

DATA ENTRY

Data is shifted into Q0 from the serial input pins on each LOW to

HIGH transition of the CP pin. Also during the CP edge the data is

transferred from each Qn to Qn+1.

The serial data on pins DSA and

DSB must be stable before and after the CP rising edge to meet the

set-up and hold timing requirements.

RESET

This action does not depend on the condition of serial input or clock

next CP positive edge pulse.

Features



Wide Supply Voltage Range from 2.0V to 6.0V





CMOS Low Power Consumption



Schmitt Trigger Action at all Inputs



ESD Protection Exceeds JESD 22



200-V Machine Model (A115)



2000-V Human Body Model (A114)



Exceeds 1000-V Charged Device Model (C101)



Range of Package Options SO-14 and TSSOP-14



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and An

timony Free. “Green” Device (Note 3)

Pin Assignments

1

3

2

4

5

6

7

DSA

Q0

DSB

Q3

8

Q7

Q5

Q6

MR

Vcc

( Top View )

SO-14 / TSSOP-14 / PDIP-14

GND

13

14

12

11

10

9

Q2

CP

Q4

Q1

Applications



General Purpose Logic



Wide Array of Products Such as:



PCs, Networking, Notebooks, Netbooks



Computer Peripherals, Hard Drives, CD/DVD ROM



TV, DVD, DVR, Set-Top Box

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Device Ordering Information is on Page 7