74AHCT164
400
8-BIT PARALLEL-OUT SERIAL SHIFT REGISTERS
Description
The 74AHCT164 is a serial input 8-bit edge-triggered shift register
that has outputs from each of eight stages. The device features TTL
compatible inputs.
SERIAL DATA INPUT PINS
The serial input data is entered at pin SDA or pin SDB as these are
logically ANDED. Either input could be used as an active HIGH
enable with data entry on the other pin. If a single input is desired,
the pins can be tied together or the unused input can be tied HIGH.
DATA ENTRY
Data is shifted into Q0 from the serial input pins on each LOW to
HIGH transition of the CP pin. Also during the CP edge the data is
transferred from each Qn to Qn+1. The serial data on pins DSA and
DSB must be stable before and after the CP rising edge to meet the
set-up and hold timing requirements.
RESET
When asserted LOW the Master Reset (
MR
) pin sets all Qn to LOW.
This action does not depend on the condition of serial input or clock
pins. The
MR
must be asserted HIGH for a recovery time before the
next CP positive edge pulse.
Pin Assignments
( Top View )
DSA
DSB
Q0
Q1
Q2
Q3
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Vcc
Q7
Q6
Q5
Q4
MR
CP
NEW PRODUCT
NEW PRODUCT
SO-14 / TSSOP-14 / PDIP-14
Features
Supply Voltage Range from 4.5V to 5.5V
Sinks or Sources 8mA at V
CC
= 4.5V
TTL Compatible Inputs
CMOS Low Power Consumption
Schmitt Trigger Action at All Inputs
ESD Protection Exceeds JESD 22
200-V Machine Model (A115)
2000-V Human Body Model (A114)
1000-V Charged Device Model (C101)
Range of Package Options SO-14 and TSSOP-14
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
General Purpose Logic
Wide Array of Products Such as:
PCs, Networking, Notebooks, Netbooks
Computer Peripherals, Hard Drives, CD/DVD ROMs
TVs, DVDs, DVRs, Set-Top Boxes
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Device ordering information is on page 7
74AHCT164
Document number: DS36282 Rev. 2 - 2
1 of 10
www.diodes.com
August 2015
© Diodes Incorporated
74AHCT164
400
Absolute Maximum Ratings
(Note 7) (T
A
= +25°C, unless otherwise specified.)
Symbol
ESD HBM
ESD CDM
ESD MM
V
CC
V
I
I
IK
Description
Human Body Model ESD Protection
Charged Device Model ESD Protection
Machine Model ESD Protection
Supply Voltage Range
Input Voltage Range (Note 8)
Input Clamp Current
Output Clamp Current
V
I
< -0.5V
V
O
< -0.5V or V
O
> V
CC
+0.5V
Rating
2
1
200
-0.5 to +7.0
-0.5 to +7.0
-20
±20
±25
75
-75
-40 to +150
-65 to +150
500
Unit
kV
kV
V
V
V
mA
mA
mA
mA
mA
°C
°C
mW
NEW PRODUCT
NEW PRODUCT
I
OK
I
O
I
CC
I
GND
T
J
T
STG
P
TOT
Notes:
Continuous Output Current -0.5V < V
O
V
CC
+0.5V
Continuous Current Through Vcc
Continuous Current Through GND
Operating Junction Temperature
Storage Temperature
Total Power Dissipation
7. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should
be within recommend values.
8. Input Voltage cannot exceed Vcc to the extent the Maximum clamp current is exceeded.
Recommended Operating Conditions
(Note 9) (T
A
= +25°C, unless otherwise specified.)
Symbol
V
CC
V
I
V
O
Δt/ΔV
T
A
Note:
Parameter
Supply Voltage
Input Voltage
Output Voltage
Input transition rise or fall rate
Operating Free-Air Temperature
Conditions
-
-
-
V
CC
= 4.5V to 5.5V
-
Min
4.5
0
0
-
-40
Max
5.5
5.5
V
CC
20
+125
Unit
V
V
V
ns/V
°C
9. Unused inputs should be held at V
CC
or Ground.
Electrical Characteristics
Symbol
Parameter
High-Level
Input Voltage
Low-Level
Input Voltage
(T
A
= +25°C, unless otherwise specified.)
T
A
= +25°C
V
CC
Min.
4.5V to
5.5V
4.5V to
5.5V
4.5V
4.5V
4.5V
4.5V
0V or
5.5V
5.5V
2.0
-
4.4
3.94
-
-
-
-
0
-
-
-
Typ.
-
-
4.5
Max.
-
0.8
-
-
0.1
0.36
±0.1
4.0
T
A
= -40°C to
+85°C
Min.
Max.
2.0
-
4.4
3.80
-
-
-
-
0.1
0.44
±1
40
-
0.8
T
A
= -40°C to +125°C
Min.
2.0
-
4.4
3.70
-
-
-
-
Max.
-
0.8
-
-
0.1
0.55
±2
80
Unit
-
V
V
V
V
μA
μA
Test
Conditions
-
-
V
IH
V
IL
V
OH
V
OL
I
I
I
CC
I
OH
= -50μA
High-Level
Output Voltage I
OH
= -8mA
I
OL
= 50μA
Low-Level
Output Voltage I
OL
= 8mA
Input Current
Supply Current
V
I
=GND or
5.5V
∆I
CC
V
I
= GND or
V
CC
, I
O
= 0A
V
I
=V
CC
-2.1V
I
O
= 0
Additional
Supply Current Other inputs
at V
CC
or
GND
4.5V to
5.5V
-
-
1.35
-
1.5
-
1.5
mA
74AHCT164
Document number: DS36282 Rev. 2 - 2
4 of 10
www.diodes.com
August 2015
© Diodes Incorporated
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