August 1993

Revised April 1999

© 1999 Fairchild Semiconductor Corporation

DS011636.prf

www.fairchildsemi.com

74VHC164

8-Bit Serial-In, Parallel-Out Shift Register

General Description

The VHC164 is an advanced high-speed CMOS device

fabricated with silicon gate CMOS technology. It achieves

the high-speed operation similar to equivalent Bipolar

Schottky TTL while maintaining the CMOS low power dissi-

pation. The VHC164 is a high-speed 8-Bit Serial-In/Paral-

lel-Out Shift Register. Serial data is entered through a 2-

input AND gate synchronous with the LOW-to-HIGH transi-

tion of the clock. The device features an asynchronous

Master Reset which clears the register, setting all outputs

LOW independent of the clock. An input protection circuit

insures that 0V to 7V can be applied to the input pins with-

out regard to the supply voltage. This device can be used

to interface 5V to 3V systems and two supply systems such

as battery backup. This circuit prevents device destruction

due to mismatched supply and input voltages.

Features

s Power down protection provided on all inputs

s Pin and function compatible with 74HC164

Ordering Code:

Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbol

Connection Diagram

Pin Descriptions

Order Number

Package Number

Package Description

74VHC164M

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow

74VHC164SJ

M14D

14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74VHC164MTC

MTC14

14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74VHC164N

N14A

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

Pin Names

Description

A, B

Data Inputs

CP

Clock Pulse Input (Active Rising Edge)

MR

Master Reset Input (Active LOW)

Outputs