Datasheet

3 2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
Q
NC
G
Q
NC
F
Q
Q
NC
E
A
Q
NC
B
Q
C
B
A
NC
CLK
CLR
V
Q
D
GND
NC
CC
H
Q
NC − No internal connection
1
2
3
4
5
6
7
14
13
12
11
10
9
8
A
B
Q
Q
Q
Q
GND
A
B
C
D
V
CC
Q
Q
Q
Q
CLR
H
G
F
E
CLK
SN54HC164, SN74HC164
www.ti.com SCLS115F –DECEMBER 1982–REVISED OCTOBER 2013
8-Bit Parallel-Out Serial Shift Registers
Check for Samples: SN54HC164, SN74HC164
1
FEATURES
DESCRIPTION
These 8-bit shift registers feature AND-gated serial
• Wide Operating Voltage Range of 2 V to 6 V
inputs and an asynchronous clear (CLR) input. The
• Outputs Can Drive Up To 10 LSTTL Loads
gated serial (A and B) inputs permit complete control
• Low Power Consumption, 80-μA Max I
CC
over incoming data; a low at either input inhibits entry
of the new data and resets the first flip-flop to the low
• Typical t
pd
= 20 ns
level at the next clock (CLK) pulse. A high-level input
• ±4-mA Output Drive at 5 V
enables the other input, which then determines the
• Low Input Current of 1-μA Max
state of the first flip-flop. Data at the serial inputs can
be changed while CLK is high or low, provided the
• AND-Gated (Enable/Disable) Serial Inputs
minimum setup time requirements are met. Clocking
• Fully Buffered Clock and Serial Inputs
occurs on the low-to-high-level transition of CLK.
• Direct Clear
SN54HC164...J OR W PACKAGE
SN74HC164...D, N, NS, OR PW PACKAGE
(TOP VIEW)
SN54HC164...FK PACKAGE
(TOP VIEW)
FUNCTION TABLE
(1)(2)
INPUTS OUTPUTS
CLR CLK A B Q
A
Q
B
. . . Q
H
L X X X L L L
H L X X Q
A0
Q
B0
Q
H0
H ↑ H H H Q
An
Q
Gn
H ↑ L X L Q
An
Q
Gn
H ↑ X L L Q
An
Q
Gn
(1) Q
A0
, Q
B0
, Q
H0
= the level of Q
A
, Q
B
, or Q
H
, respectively, before the
indicated steady-state input conditions were established.
(2) Q
An
, Q
Gn
= the level of Q
A
or Q
G
before the most recent ↑ transition
of CLK: indicates a 1-bit shift.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 1982–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.