74HC165
8-bit parallel-in/serial out shift register
Draft datasheet, Rev. 1.0
Aug 08, 2024
1.General Description
The 74HC165is an 8-bit serial or parallel-in/serial-out shift register. The device features a
serial data input (DS), eight parallel data inputs (D0 to D7) and two complementary serial
outputs (Q7 and Q7). When the parallel load input (PL) is LOW the data from D0 to D7 is loaded
into the shift register asynchronously. When PL is HIGH data enters the register serially at DS.
When the clock enable input (CE) is LOW data is shifted on the LOW-to-HIGH transitions of the
CP input. A HIGH on CE will disable the CP input. Inputs include clamp diodes, this enables the
use of current limiting resistors to interface inputs to voltages in excess of VCC.
2.Features and Benefits
Wide supply voltage range from 2.0 V to 6.0 V
High noise immunity
CMOS low power dissipation
Asynchronous 8-bit parallel load
Synchronous serial input
Latch-up performance exceeds 250 mA
Complies with JEDEC standard:
•
JESD8C(2.7 V to 3.6 V)
•
JESD7A(2.0 V to 6.0 V)
ESD protection:
•
HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 3500 V
•
CDM ANSI/ESDA/JEDEC JS-002 Class C3 exceeds 2000 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Rev. 1.0 – Aug 08, 2024
1
74HC165
8-bit parallel-in/serial out shift register
Draft datasheet, Rev. 1.0
Aug 08, 2024
3.Ordering Information
Table 1. Ordering information
Type number
Package
Name
74HC165D
SOP-16L
74HC165PW
TSSOP-16L
Rev. 1.0 – Aug 08, 2024
Description
plastic small outline package; 16 leads;
body width 3.9 mm
plastic thin shrink small outline package;
16 leads; body width 4.4 mm
Quantity
2500
2500
2
74HC165
8-bit serial-in/serial-out shift register
4.Function Diagram
Fig. 1. Logic symbol
Fig. 2. IEC logic symbol
Fig. 3. Logic diagram
Rev. 1.0 – Aug 08, 2024
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74HC165
8-bit serial-in/serial-out shift register
5.Pinning Information
5.1. Pinning
Fig. 4. Top view pin configuration SOP and TSSOP
5.2. Pin description
Table 2. Pin description
Symbol
Pin
Description
PL
1
asynchronous parallel load input (active LOW)
CP
2
clock input (LOW-to-HIGH edge-triggered)
Q7
7
complementary output from the last stage
GND
8
ground(0V)
Q7
9
serial output from the last stage
DS
10
serial data input
D0 to D7
11, 12, 13, 14, 3, 4, 5, 6
parallel data inputs (also referred to as Dn)
CE
15
clock enable input (active LOW)
VCC
16
supply voltage
Rev. 1.0 – Aug 08, 2024
4
74HC165
8-bit serial-in/serial-out shift register
6.Functional Description
Table 3. Function table
H = HIGH voltage level;
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition;
L = LOW voltage level;
I = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition;
q = state of the referenced input one set-up time prior to the LOW-to-HIGH clock transition;
X = don’t care
↑ = LOW-to-HIGH transition;
Inputs
Qn registers
Operating modes
CP
DS
D0 to D7
Q0
Q1 to Q6
PL
CE
parallel load
serial shift
Hold“do nothing”
Outputs
Q7
Q7
L
X
X
X
L
L
L to L
L
H
L
X
X
X
H
H
H to H
H
L
H
L
↑
I
X
L
q0 to q5
q6
q6
H
L
↑
h
X
H
q0 to q5
q6
q6
H
↑
L
I
X
L
q0 to q5
q6
q6
H
↑
L
h
X
H
q0 to q5
q6
q6
H
H
X
X
X
q0
q1 to q6
q7
q7
H
X
H
X
X
q0
q1 to q6
q7
q7
Fig. 5. Timing diagram
Rev. 1.0 – Aug 08, 2024
5
74HC165
8-bit serial-in/serial-out shift register
7.Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function
or be operable above the recommended operating conditions and stressing the parts to these levels is
not recommended. In addition, extended exposure to stresses above the recommended operating
conditions may affect device reliability. The absolute maximum ratings are stress ratings only.
Table 4. Absolute Maximum Ratings
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND.
Symbol
Parameter
VCC
supply voltage
IIK
input clamping current
IOK
output clamping current
IO
output current
ICC
supply current
IGND
ground current
Ptot
total power dissipation
Tstg
storage temperature
Conditions
Min
Max
Unit
-0.5
7.0
V
±20
mA
±20
mA
±25
mA
50
mA
VI < -0.5 V or VI > VCC + 0.5 V
[1]
VO < -0.5 V or VO > VCC + 0.5 V
[1]
-0.5 V < VO < VCC + 0.5 V
-50
mA
Tamb = -40 °C to + 125 °C
-65
500
mW
150
°C
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
8.Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation.
Recommended operating conditions are specified to ensure optimal performance to the datasheet
specifications. MDD does not recommend exceeding them or designing to Absolute Maximum Ratings.
Table 5. Recommended Operating Conditions
Symbol
Parameter
VCC
Conditions
74HC165
Unit
Min
Typ
Max
supply voltage
2.0
5.0
6.0
V
VI
input voltage
0
VCC
V
VO
output voltage
0
VCC
V
Tamb
ambient temperature
+125
°C
625
ns/V
139
ns/V
83
ns/V
-40
+25
VCC = 3.0 V
Δt/ΔV
input transition rise and fall rate
VCC = 4.5 V
VCC = 6.0 V
Rev. 1.0 – Aug 08, 2024
1.67
6
74HC165
8-bit serial-in/serial-out shift register
9.Static Characteristics
Table 6. Static characteristics
At recommended operating conditions. Voltages are referenced to GND (ground = 0 V).
Symbol
Parameter
VIH
HIGH-level
input voltage
VIL
LOW-level
input voltage
Conditions
-40 °C to +85 °C
-40 °C to +125 °C
Max
Min
Max
Unit
Min
Typ[1]
VCC = 2.0 V
1.5
1.2
1.5
V
VCC = 4.5 V
3.15
2.4
3.15
V
VCC = 6.0 V
4.2
3.5
4.2
V
VCC = 2.0 V
0.8
0.5
0.5
V
VCC = 4.5 V
2.1
1.35
1.35
V
VCC = 6.0 V
2.8
1.8
1.8
V
VI = VIH or VIL
VOH
HIGH-level
output
voltage
IO = -20μA; VCC = 2.0 V
1.9
2.0
1.9
V
IO = -20μA; VCC = 4.5 V
4.4
4.5
4.4
V
IO = -20μA; VCC = 6.0 V
5.9
6.0
5.9
V
IO = -4.0 mA; VCC = 4.5 V
3.84
4.4
3.7
V
IO = -5.2 mA; VCC = 6.0 V
5.34
5.9
5.2
V
VI = VIH or VIL
IO = 20μA; VCC = 2.0 V
VOL
II
ICC
CI
LOW-level
output voltage
input leakage
current
supply
current
input
capacitance
0
0.1
0.1
V
V
IO = 20μA; VCC = 4.5 V
0
0.1
0.1
IO = 20μA; VCC = 6.0 V
0
0.1
0.1
V
IO = 4.0 mA; VCC = 4.5 V
0.04
0.33
0.4
V
IO = 5.2 mA; VCC = 6.0 V
0.05
0.33
0.4
V
0.1
±1
±1
μA
11
20
40
μA
VI = VCC or GND ;
VCC = 6.0 V
VI = VCC or GND ; IO = 0A ;
VCC = 6.0 V
Pin PL,DS
4.3
pF
Pin CP, CE
7.0
pF
Pin D0 to D7
8.6
pF
[1]All typical values are measured at Tamb = 25°C.
Rev. 1.0 – Aug 08, 2024
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74HC165
8-bit serial-in/serial-out shift register
10. Dynamic Characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 11.
Symbol
Parameter
tpd
VCC = 2.0 V
25
37
40
ns
VCC = 4.5 V
12.5
17
20
ns
VCC = 5.0 V
11.7
15
18
ns
VCC = 6.0 V
10.4
13
15
ns
VCC = 2.0 V
25
37
40
ns
VCC = 4.5 V
11.8
17
20
ns
VCC = 5.0 V
10.7
15
18
ns
VCC = 6.0 V
9.7
13
15
ns
VCC = 2.0 V
25
37
40
ns
VCC = 4.5 V
12.4
17
20
ns
VCC = 5.0 V
11.5
15
18
ns
VCC = 6.0 V
10.1
13
15
ns
VCC = 2.0 V
4
9
11
ns
VCC = 4.5 V
2.2
7
9
ns
VCC = 6.0 V
1.9
7
9
ns
D7 to Q7, Q7; see Fig. 8
Min
Max
Unit
Max
PL to Q7, Q7; see Fig. 7
Min
-40 °C to +125 °C
Typ[1]
CP or CE to Q7, Q7;
see Fig. 6
propagation
delay
-40 °C to +85 °C
Conditions
[2]
[2]
[2]
Q7, Q7 output; see Fig. 6 [3]
tt
transition
time
CP HIGH or LOW;see Fig. 6
tW
pulse width
Rev. 1.0 – Aug 08, 2024
VCC = 2.0 V
30
36
ns
VCC = 4.5 V
20
24
ns
VCC = 6.0 V
17
20
ns
VCC = 2.0 V
25
30
ns
VCC = 4.5 V
15
18
ns
VCC = 6.0 V
13
15
ns
PL LOW; see Fig. 7
8
74HC165
8-bit serial-in/serial-out shift register
Symbol
Parameter
Conditions
-40 °C to +85 °C
Min
Typ[1]
-40 °C to +125 °C
Max
Min
Max
Unit
PL to CP, CE; see Fig. 7
trec
recovery time
VCC = 2.0 V
25
28
ns
VCC = 4.5 V
15
18
ns
VCC = 6.0 V
13
15
ns
VCC = 2.0 V
30
35
ns
VCC = 4.5 V
20
24
ns
VCC = 6.0 V
17
20
ns
VCC = 2.0 V
30
35
ns
VCC = 4.5 V
20
24
ns
VCC = 6.0 V
17
20
ns
VCC = 2.0 V
30
35
ns
VCC = 4.5 V
20
24
ns
VCC = 6.0 V
17
20
ns
VCC = 2.0 V
5
5
ns
VCC = 4.5 V
5
5
ns
VCC = 6.0 V
5
5
ns
VCC = 2.0 V
5
5
ns
VCC = 4.5 V
5
5
ns
VCC = 6.0 V
5
5
ns
VCC = 2.0 V
16
12
MHz
VCC = 4.5 V
24
20
MHz
VCC = 6.0 V
28
24
MHz
DS to CP, CE; see Fig. 9
CE to CP and CP to CE;
see Fig. 9
tSU
set up time
Dn to PL; see Fig. 10
DS to CP, CE and Dn to
PL; see Fig. 9
th
hold time
CE to CP and CP to CE;
see Fig. 9
for CP; see Fig. 6
fmax
maximum
frequency
Rev. 1.0 – Aug 08, 2024
9
74HC165
8-bit serial-in/serial-out shift register
Symbol
Parameter
Conditions
CPD
power
dissipation
capacitance
per package ;
VI = GND to VCC ;
-40 °C to +85 °C
Min
[4]
Typ[1]
26
-40 °C to +125 °C
Max
Min
Max
Unit
pF
[1] Typical values are measured at Tamb = 25 °C.
[2] tpd is the same as tPLH and tPHL.
[3] tt is the same as tTHL and tTHL.
[4] CPD is used to determine the dynamic power dissipation (PD in μW).
PD = CPD × VCC2 × fi × N + Σ(CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
Σ(CL × VCC2 × fo) = sum of outputs.
Rev. 1.0 – Aug 08, 2024
10
74HC165
8-bit serial-in/serial-out shift register
11. Waveforms and test circuit
Measurement points are given in Table 8.
VOL and VOH are typical output voltage levels that occur with the output load.
Fig. 6. The clock (CP) or clock enable (CE) to output (Q7 or Q7) propagation delays, the clock pulse
width, the maximum clock frequency and the output transition times
Measurement points are given in Table 8.
VOL and VOH are typical output voltage levels that occur with the output load.
Fig. 7. The parallel load (PL) pulse width, the parallel load to output (Q7 or Q7) propagation delays, the
parallel load to clock (CP) and clock enable (CE) recovery time
Rev. 1.0 – Aug 08, 2024
11
74HC165
8-bit serial-in/serial-out shift register
Measurement points are given in Table 8.
VOL and VOH are typical output voltage levels that occur with the output load.
Fig. 8.
The data input (D7) to output (Q7 or Q7) propagation delays when PL is LOW
The shaded areas indicate when the input is permitted to change for predictable output performance.
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
(1) CE may change only from HIGH-to-LOW while CP is LOW, see Section 1.
Fig. 9. The set-up and hold times from the serial data input (DS) to the clock (CP) and clock enable
(CE) inputs, from the clock enable input (CE) to the clock input (CP) and from the clock input (CP)
to the clock enable input (CE)
Rev. 1.0 – Aug 08, 2024
12
74HC165
8-bit serial-in/serial-out shift register
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 10. The set-up and hold times from the data inputs (Dn) to the parallel load input (PL)
Table 8. Measurement points
Type
74HC165
Rev. 1.0 – Aug 08, 2024
Input
Output
VI
VM
VX
VY
0.5VCC
0.5VCC
0.1VCC
0.9VCC
13
74HC165
8-bit serial-in/serial-out shift register
Test data is given in Table 9.
Definitions for test circuit:
CL = Load capacitance including jig and probe capacitance.
RT = Termination resistance should be equal to the output impedance Zo of the pulse generator.
Fig. 11. Test circuit for measuring switching times
Table 9. Test data
Type
74HC165
Rev. 1.0 – Aug 08, 2024
Input
Load
VI
tr = tf
CL
VCC
2.5 ns
50 pF
Test
tPHL, tPLH
14
74HC165
8-bit serial-in/serial-out shift register
12. Package Outline
SOP-16L
Symbol
A
A1
A2
b
c
D
e
E
E1
L
θ
Rev. 1.0 – Aug 08, 2024
Dimensions In Millimeters
Min.
Max.
1.750
——
0.150
0.250
1.400
1.500
0.330
0.510
0.170
0.250
9.800
10.000
1.270(BSC)
5.900
6.100
3.800
4.000
0.400
1.270
0°
8°
Dimensions In Inches
Min.
Max.
0.069
——
0.006
0.010
0.055
0.059
0.013
0.020
0.007
0.010
0.386
0.394
0.050(BSC)
0.232
0.240
0.150
0.157
0.016
0.050
0°
8°
15
74HC165
8-bit serial-in/serial-out shift register
TSSOP-16L
Symbol
A
A1
A2
b
c
D
e
E
E1
L
θ
Rev. 1.0 – Aug 08, 2024
Dimensions In Millimeters
Min.
Max.
1.200
——
0.020
0.100
0.800
1.000
0.190
0.300
0.090
0.200
4.900
5.100
0.650(BSC)
6.250
6.550
4.300
4.500
0.500
0.700
1°
7°
Dimensions In Inches
Min.
Max.
0.047
——
0.001
0.004
0.031
0.039
0.007
0.012
0.004
0.008
0.193
0.201
0.026(BSC)
0.252(BSC)
0.169
0.177
0.020
0.028
1°
7°
16
74HC165
8-bit serial-in/serial-out shift register
13. Abbreviations
Table 10. Abbreviations
Acronym
Description
CMOS
Complementary Metal-Oxide Semiconductor
DUT
Device Under Test
ESD
ElectroStatic Discharge
HBM
Human Body Model
CDM
Charged Device Model
14. Revision History
Table 11. Revision history
Document ID
Release Date
Data sheet status
74HC165 Rev. 1.0
Feb 20, 2025
Draft datasheet
Rev. 1.0 – Aug 08, 2024
Change notice
Supersedes
17