Datasheet

SN74HC165 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
3 2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
D
C
NC
B
A
E
F
NC
G
H
SN54HC165
. . . FK PACKAGE
(TOP VIEW)
CLK
SH/LD
NC
SER
CLK INH
H
GND
NC
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SH/LD
CLK
E
F
G
H
Q
H
GND
V
CC
CLK INH
D
C
B
A
SER
Q
H
Q
H
Q
NC − No internal connection
SN54HC165 . . . J or W PACKAGE
SN54HC165, SN74HC165
www.ti.com SCLS116G –DECEMBER 1982–REVISED AUGUST 2013
8-BIT PARALLEL-LOAD SHIFT REGISTERS
Check for Samples: SN54HC165, SN74HC165
1
FEATURES
DESCRIPTION
The ’HC165 devices are 8-bit parallel-load shift
• Wide Operating Voltage Range of 2 V to 6 V
registers that, when clocked, shift the data toward a
• Outputs Can Drive Up To 10 LSTTL Loads
serial (Q
H
) output. Parallel-in access to each stage is
• Low Power Consumption, 80-μA Max I
CC
provided by eight individual direct data (A−H) inputs
that are enabled by a low level at the shift/load
• Typical t
pd
= 13 ns
(SH/LD) input. The ’HC165 devices also feature a
• ±4-mA Output Drive at 5 V
clock-inhibit (CLK INH) function and a complementary
• Low Input Current of 1 μA Max
serial (QH) output.
• Complementary Outputs
Clocking is accomplished by a low-to-high transition
• Direct Overriding Load (Data) Inputs
of the clock (CLK) input while SH/LD is held high and
CLK INH is held low. The functions of CLK and CLK
• Gated Clock Inputs
INH are interchangeable. Since a low CLK and a low-
• Parallel-to-Serial Data Conversion
to-high transition of CLK INH also accomplish
clocking, CLK INH should be changed to the high
level only while CLK is high. Parallel loading is
inhibited when SH/LD is held high. While SH/LD is
low, the parallel inputs to the register are enabled
independently of the levels of the CLK, CLK INH, or
serial (SER) inputs.
1
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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.