MM74C164 8-Bit Parallel-Out Serial Shift Register
October 1987
Revised January 1999
MM74C164
8-Bit Parallel-Out Serial Shift Register
General Description
The MM74C164 shift registers are a monolithic comple-
mentary MOS (CMOS) integrated circuit constructed with
N- and P-channel enhancement transistors. These 8-bit
shift registers have gated serial inputs and clear. Each reg-
ister bit is a D-type master/slave flip-flop. A high-level input
enables the other input which will then determine the state
of the flip-flop.
Data is serially shifted in and out of the 8-bit register during
the positive going transition of clock pulse. Clear is inde-
pendent of the clock and accomplished by a low level at the
clear input. All inputs are protected against electrostatic
effects.
Features
s
Supply voltage range:
s
High noise immunity:
3V to 15V
drive 2 LPTTL loads
0.45 V
CC
(typ.)
s
Tenth power TTL compatible:
s
Low power: 50 nW (typ.)
s
Medium speed operation: 0.8 MHz (typ.) with 10V
supply
Applications
鈥?Data terminals
鈥?Instrumentation
鈥?Medical electronics
鈥?Alarm systems
鈥?Industrial electronics
鈥?Remote metering
鈥?Computers
Ordering Code:
Order Number
MM74C164M
MM74C164N
Package Number
M14A
N14A
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150鈥?Narrow
14-Lead Plastic Dual-In-Line (PDIP), JEDEC MS-001, 0.300鈥?Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Pin Assignments for DIP and SOIC
Truth Table
Serial Inputs A and B
Inputs
t
n
A
1
0
1
0
B
1
1
0
0
Output
t
n+1
Q
A
1
0
0
0
Top View
漏 1999 Fairchild Semiconductor Corporation
DS005896.prf
www.fairchildsemi.com