74AHCT595

74AHCT595
8-BIT SHIFT REGISTER 8-BIT OUTPUT REGISTER
Description
Pin Assignments
The 74AHCT595 is an advanced high speed CMOS device that is
designed to be pin compatable with 74LS low power Schottky types.
An eight bit shift register accepts data from the serial input (DS) on
each positive transition of the shift register clock (STCP).
When
asserted low, the reset function (MR) sets all shift register values to
zero and is independent of all clocks.
Data from the input serial shift register is placed in the output register
with a rising pulse on the storages resister clock (SHCP). With the
output enable (OE asserted low the 3-state outputs Q0-Q7 become
active and present.
All registers capture data on rising edge and change output on the
falling edge. If both clocks are connected together, the input shift
register is always one clock cycle ahead of the output register.
Features
Applications


Supply Voltage Range from 4.5V to 5.5V
Sinks or sources 8mA at VCC = 4.5V

General Purpose Logic

Serial to Parallel Data conversion

CMOS low power consumption

Capture and hold data for extended periods of time.

Schmitt Trigger Action at All Inputs


Inputs accept up to 5.5V

Allow simple serial bit streams from a microcontroller to control as
many peripheral lines as needed.

ESD Protection Tested per JESD 22
Wide array of products such as:

Exceeds 200-V Machine Model (A115-A)

Computer peripherals

Exceeds 2000-V Human Body Model (A114-A)

Appliances

Exceeds 1000-V Charged Device Model (C101C)

Industrial control

Latch-Up Exceeds 250mA per JESD 78, Class II

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)
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.
Click here for ordering information, located at the end of datasheet
74AHCT595
Document number: DS35487 Rev. 3 - 2
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74AHCT595
Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
Q1
Q2
Q3
Q4
Q5
Q6
Q7
GND
Q7S
MR
SHCP
STCP
OE
DS
Q0
Vcc
Functional Diagram
Description
Parallel Data Output 1
Parallel Data Output 2
Parallel Data Output 3
Parallel Data Output 4
Parallel Data Output 5
Parallel Data Output 6
Parallel Data Output 7
Ground
Serial Data Output
Master Reset Input
Shift Register Clock Input
Storage Register Clock Input
Output Enable Input
Serial Data Input
Parallel Data Output 0
Supply Voltage
Logic Diagram
74AHCT595
Document number: DS35487 Rev. 3 - 2
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74AHCT595
Functional Description and Timing Diagram
Control
Input
Output
Function
SHCP
STCP
OE
MR
DS
Q7S
Qn
X
X
L
L

L
NC
X
L
L

L
L
X

X
Low-level asserted on MR clears shift register.
Storage register is unchanged
Empty shift register transferred to storage register
H
L

L
Z
Shift register remains clear;: All Q ouputs in Z state.

X
L
H

Q6S
NC
X

L
H

NC
QnS


L
H

Q6S
QnS
HIGH is shifted into first stage of Shift Register Contents of each
register shifted to next register
The content of Q6S has been shifted to Q7S and now appears on
device pin Q7S
Contents of shift register copied to storage register. With output now
in active state the storage resister contents appear on Q outputs.
Contents of shift register copied to output register then shift register
shifted.
H=HIGH voltage state
L=LOW voltage state
=LOW to HIGH transition
X= don’t care – high or low (not floating)
NC= No change
Z= high-impedance state
74AHCT595
Document number: DS35487 Rev. 3 - 2
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74AHCT595
Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.)
Symbol
ESD HBM
ESD CDM
ESD MM
Rating
2
1
200
Unit
kV
kV
V
V
Supply Voltage Range
-0.5 to +7.0
VI
Input Voltage Range
-0.5 to +7.0
V
Vo
Voltage applied to output in high or low state
-0.5 to VCC +0.5
V
IIK
Input Clamp Current
VI < -0.5V
-20
mA
Output Clamp Current
VO <-0.5V
-20
mA
IOK
Output Clamp Current
VO > VCC +0.5V
IO
Continuous output current
ICC
IGND
VCC
IOK
20
mA
±25
mA
Continuous current through Vcc or GND
75
mA
Continuous current through Vcc or GND
-75
mA
°C
Operating Junction Temperature
-40 to +150
TSTG
Storage Temperature
-65 to +150
°C
PTOT
Total Power Dissipation
500
mW
TJ
Notes:
Description
Human Body Model ESD Protection
Charged Device Model ESD Protection
Machine Model ESD Protection
4. 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.
Recommended Operating Conditions (Note 5) (@TA = +25°C, unless otherwise specified.)
Symbol
VCC
VI
Parameter
Conditions
Min
Max
Unit
Supply Voltage

4.5
5.5
V
Input Voltage

0
5.5
V
Output Voltage
Active Mode
0
VCC
V
Δt/ΔV
Input transition rise or fall rate
VCC = 4.5V to 5.5V

20
ns/V
TA
Operating free-air temperature

-40
+125
°C
VO
Note:
5. Unused inputs should be held at VCC or Ground.
Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
Test Conditions
VIL
High-Level
Input Voltage
Low-Level
Input voltage
VOH
High-Level
Output Voltage
IOH = -50μA
VOL
Low-Level
Output Voltage
IOL = 50μA
VIH
II
Input Current
VCC
TA = +25°C
Min
Typ Max
TA = -40°C to +85°C
Min
Max
TA = -40° C to +125°C
Min
Max
Unit

4.5V to 5.5V
2.0


2.0

2.0

V

4.5V to 5.5V


0.8

0.8

0.8
V
IOH = -8mA
IOL = 8mA
VI =GND to
5.5V
4.4
4.5

4.4

4.4

3.94


3.80

3.70


0
0.1

0.1

0.1


0.36

0.44

0.55
0 to 5.5V

0.1
±1

±1

±2
μA
4.5V
4.5V
V
V
IOZ
Z-state Leakage VO = Vcc or GND
Current
OE = HIGH
5.5V


± 0.25

2.5

10
μA
ICC
Supply Current
VI = GND or VCC
IO = 0
5.5V


4.0

40

80
μA
4.5V to 5.5V


1.35

1.5

1.5
mA
5.5V

4
10

10

10
pF
∆ICC
Ci
Additional
Supply Current
per Input
Input
Capacitance
VI = Vcc -2.1V
IO = 0
Vi = VCC or GND
74AHCT595
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74AHCT595
Switching Characteristics
Symbol /
Parameter
fMAX
Maximum
Frequency
Test Conditions
VCC
SHCP or STCP
Figure 1
4.5V to 5.5V
130
170
Figure 1
4.5V to 5.5V
5.0
Figure 1
4.5V to 5.5V
5.0
SHCP
HIGH or LOW
STCP
HIGH or LOW
tW
Pulse Width
TA = +25°C
Typ
Max
Pins
Min
-40°C to +85°C
-40°C to +125°C
Min
Max
Min
Max

110

90



5.0

5.0



5.0

5.0

Unit
MHz
ns
MR LOW
Figure 1
4.5V to 5.5V
5.0


5.0

5.0

DS to SHCP
Figure 1
4.5V to 5.5V
3.0


3.0

3.0

ns
SHCP to STCP
Figure 1
4.5V to 5.5V
5.0


5.0

5.0

ns
DS to SHCP
Figure 1
4.5V to 5.5V
2.0


2.0

2.0

ns
tREC
Recovery Time MR to SHCP
Figure 1
4.5V to 5.5V
3.0


3.0

3.0

ns
4.5V to 5.5V

3.8
8.2
1.0
9
1.0
10
4.5V to 5.5V

5.2
10
1.0
11
1.0
12
4.5V to 5.5V

4
7.4
1.0
8.5
1.0
9.5
4.5V to 5.5V

5.3
9
1.0
10.5
1.0
11.5
4.5V to 5.5V

4.6
8.2
1.0
9.5
1.0
10.5
4.5V to 5.5V

5.8
10.5
1.0
11.5
1.0
12.5
4.5V to 5.5V

4.8
9
1.0
11
1.0
12
4.5V to 5.5V

6.2
11.6
1.0
13
1.0
14.5
4.5V to 5.5V

3.6
6.9
1.0
8
1.0
9
4.5V to 5.5V

5.8
10.3
1.0
11
1.0
12
tSU
Set-up Time
tH
Hold Time
SHCP to Q7S
tPD
Propagation
Delay
STCP to Qn
MR to Q7S
tEN
Enable Time
OE to Qn
tDIS
Disable Time
OE to Qn
Figure 1
CL = 15pF
Figure 1
CL = 50pF
Figure 1
CL = 15pF
Figure 1
CL = 50pF
Figure 1
CL = 15pF
Figure 1
CL = 50pF
Figure 1
CL = 15pF
Figure 1
CL = 50pF
Figure 1
CL = 15pF
Figure 1
CL = 50pF
ns
ns
ns
ns
ns
Operating Characteristics (@TA = +25°C, unless otherwise specified.)
Parameter
Cpd
Power dissipation
capacitance
74AHCT595
Document number: DS35487 Rev. 3 - 2
Test
Conditions
VCC = 5V
f = 1 MHz all outputs switching-no load
42
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Typ
Unit
pF
June 2013
© Diodes Incorporated
74AHCT595
Parameter Measurement Information
VCC
4.5V to 5.5V
TEST
Vload
tPLH/tPHL
Open
tPLZ/tPZL
VCC
tPHZ/tPZH
GND
Inputs
VI
3.0V
VM
tr/tf
3ns
Input
Output
1.5V
VCC/2
CL
15pF, 50pF
Voltage Waveform
Pulse Duration and Recovery Time
Voltage Waveform
Set-up and Hold Times
Voltage Waveform
Propagation Delay Times
Inverting and Non Inverting Outputs
Voltage Waveform
Enable and Disable Times
Notes:
A. Includes test lead and test apparatus capacitance.
B. Output Waveform 1 depends on the internal QN node being low and behaves in this manner based on OE pin.
Output Waveform 2 depends on the internal QN node being high and behaves in this manner based on OE pin.
C. All pulses are supplied at pulse repetition rate ≤ 10 MHz.
D. Inputs are measured separately one transition per measurement.
E. tPLH and tPHL are the same as tPD.
Figure 1 Load Circuit and Voltage Waveforms
74AHCT595
Document number: DS35487 Rev. 3 - 2
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74AHCT595
Ordering Information
Part Number
Package Code
Packaging
74AHCT595S16-13
74AHCT595T16-13
S16
T16
SO-16
TSSOP-16
Note:
7” Tape and Reel (Note 6)
Quantity
Part Number Suffix
2500/Tape & Reel
-13
2500/Tape & Reel
-13
6. The taping orientation is located on our website at http://www.diodes.com/datasheets/ap02007.pdf
Marking Information
(1) SO-16, TSSOP16
Part Number
74AHCT595S16
74AHCT595T16
74AHCT595
Document number: DS35487 Rev. 3 - 2
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Package
SO-16
TSSOP-16
June 2013
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74AHCT595
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
Package Type: SO-16
H
E
Gauge Plane

L
Detail ‘A’
D
A
A2
e
B
A1
C
SO-16
Dim
Min
Max
A
1.40
1.75
A1
0.10
0.25
A2
1.30
1.50
B
0.33
0.51
C
0.19
0.25
D
9.80
10.00
E
3.80
4.00
e
1.27 Typ
H
5.80
6.20
L
0.38
1.27
Θ
0
8
All Dimensions in mm
Detail ‘A’
Package Type: TSSOP-16
E/2
SEE DETAIL 'A'
E1
E
Y
X
PIN 1
x)
b
e

Ø0.760Depth0.050±0.02
A2
R1
D
R
L2
C
GAUGE
PLANE
A
L
SEATING PLANE
A1
L1
DETAIL 'A'
74AHCT595
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
TSSOP-16
Dim Min Max Typ
A
1.08
A1 0.05 0.15
A2 0.80 0.93
b 0.19 0.30
c 0.09 0.20
D 4.90 5.10
E
6.40 BSC
E1 4.30 4.50
e
0.65 BSC
L 0.45 0.75
L1
1.00 REF
L2
0.25 BSC
R 0.09
R1 0.09
X
1.350
Y
1.050
Θ
0°
8°
Θ1
5°
15°
Θ2
0°
All Dimensions in mm
June 2013
© Diodes Incorporated
74AHCT595
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
Package Type: SO-16
X1
Y1
Y
Dimensions
C
X
X1
Y
Y1
Value (in mm)
1.270
0.670
9.560
1.450
6.400
Pin 1
C
X
Package Type: TSSOP-16
X1
Dimensions
C
X
X1
Y
Y1
Y1
Y (16x)
Value (in mm)
0.650
0.350
4.900
1.400
6.800
1
X (16x)
74AHCT595
Document number: DS35487 Rev. 3 - 2
C
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74AHCT595
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
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website, harmless against all damages.
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This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
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Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
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representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or
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