DIODES 74AHC594

74AHC594
8-BIT SHIFT REGISTER WITH 8-BIT OUTPUT REGISTER
Description
Pin Assignments
The 74AHC594 is an advanced high speed CMOS device.
An eight bit shift register accepts data from the serial input (DS) on
each positive transition of the shift register clock (SHCP).
When
asserted low the shift regisister reset function (SHR) sets all shift
register values to zero and is independent of all clocks. Also when
asserted low the storage register reset function (STR) 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 (STCP).
The
storage resister includes output Q7S which is used for cascading
information between devices. As the information moves into the
storage register, it is asserted on the push-pull outputs Q0-Q7.
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


Wide Supply Voltage Range from 2.0V 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 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
74AHC594
Document number: DS35484 Rev. 3 - 2
1 of 11
www.diodes.com
June 2013
© Diodes Incorporated
74AHC594
Pin Descriptions
Functional Diagram
Pin Number
Pin Name
1
Q1
Parallel Data Output 1
2
Q2
Parallel Data Output 2
3
Q3
Parallel Data Output 3
4
Q4
Parallel Data Output 4
5
Q5
Parallel Data Output 5
6
Q6
Parallel Data Output 6
7
Q7
8
GND
Functions
Parallel Data Output 7
Ground
9
Q7S
Serial Data Output
10
SHR
Shift Register Reset active low
11
SHCP
12
STCP
13
STR
14
DS
Shift Register Clock Input
Storage Register Clock Input
Storage Register Reset active low
Serial Data input
15
Q0
Parallel Data Output 0
16
Vcc
Supply Voltage
Logic Diagram
STAGE 0
DS
D
STAGES 1 TO 6
Q
D
STAGE 7
Q
D
Q
FF0
CP
FF7
CP
R
R
SHCP
SHR
D
Q
D
LATCH
CP
Q
LATCH
CP
R
R
STCP
STR
Q0
74AHC594
Document number: DS35484 Rev. 3 - 2
Q1 Q2 Q3
Q4 Q5 Q6
2 of 11
www.diodes.com
Q7
June 2013
© Diodes Incorporated
74AHC594
Functional Description and Timing Diagram
Control
SHR
L
X
STR
X
L
Input
SHCP
X
X
Output
STCP
X
X
DS
X
X
Q7S
L
NC
Qn
NC
L
Function
Clear Shift Register
Clear Storage Register
H
X

L
H or L
Q6S
NC
Loads DS into shift register stage 0. All QS shifted
H
H
X

X
NC
Qs
H
H


H or L
Q6S
QnS
Contents of shift register moved to starge register all QS -> QN
Shift Register one pulse count ahead of storage register.
H=HIGH voltage state
L=LOW voltage state
↑=LOW to HIGH transition
X= don’t care – high or low (not floating)
NC= No change
SHCP
DS
STCP
SHR
STR
Q0
Q1
Q6
Q7
Q7S
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
-0.3 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
75
mA
Continuous current through 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:
Parameter
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.
74AHC594
Document number: DS35484 Rev. 3 - 2
3 of 11
www.diodes.com
June 2013
© Diodes Incorporated
74AHC594
Recommended Operating Conditions (Note 5) (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
Conditions

Supply Voltage
VCC
Min
Max
Unit
2.0
5.5
V
VI
Input Voltage

0
5.5
V
VO
Output Voltage

0
VCC
V
VCC = 3.0V to 3.6V

100
VCC = 4.5V to 5.5V

20
-40
+125
Δt/ΔV
Input transition Rise or Fall Rate
TA
Operating Free-Air Temperature
Note:

ns/V
°C
5. Unused inputs should be held at VCC or Ground.
Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
Symbol
VIH
VIL
VOH
VOL
VCC
TA = +25°C
Min
Typ Max

2.0V
1.5


1.5

1.5


3.0V
2.1


2.1

2.1


5.5V
3.85

3.85
2.0V




0.5
3.85


0.5

0.5

3.0V


0.9

0.9

0.9

5.5V

1.65

1.65

1.65
IOH = -50μA
2.0V
1.9

2.0

1.9

1.9

IOH = -50μA
3.0V
2.9
3.0

2.9

2.9

IOH = -50μA
4.5V
4.4
4.5

4.4

4.4

IOH = -4mA
3.0V
2.58


2.48

2.40

Parameter
High-Level
Input Voltage
Low-Level
Input Voltage
High-Level
Output Voltage
Low-Level
Output Voltage
Test Conditions
TA = -40°C to +85°C
Min
Max
TA = -40°C to +125°C
Min
Max

IOH = -8mA
4.5V
3.94


3.80

3.70

IOL = 50μA
2.0V

0
0.1

0.1

0.1
IOL = 50μA
3.0V

0
0.1

0.1

0.1
IOL = 50μA
4.5V

0
0.1

0.1

0.1
IOL = 4mA
3.0V


0.36

0.44

0.55
Unit
V
V
V
V
IOL = 8mA
4.5V


0.36

0.44

0.55
Input Current
VI = GND or 5.5V
5.5V

0.01
± 0.1

±1

±2
μA
ICC
Supply Current
VI = GND or VCC
IO = 0
5.5V


4

40

80
μA
Ci
Input
Capacitance
Vi = VCC or GND
5.5V

3.5
10

10

10
pF
II
74AHC594
Document number: DS35484 Rev. 3 - 2
4 of 11
www.diodes.com
June 2013
© Diodes Incorporated
74AHC594
Switching Characteristics
Symbol /
Parameter
fMAX
Maximum
Frequency
tW
Pulse Width
tSU
Set-up Time
tH
Hold Time
tREC
Recovery Time
Pins
Test Conditions
SHCP or
STCP
Figure1
SHCP and
STCP
HIGH or LOW
Figure1
SHR and STR
HIGH or LOW
Figure1
DS to SHCP
Figure1
SHR to STCP
Figure1
SHCP tp
STCP
Figure1
DS to SHCP
Figure1
SHR to SHCP
Figure1
SHR to STCP
Figure1
Figure1 CL = 15pF
SHCP toQ7S
tPLH
LOW to HIGH
Propagation
Delay
Figure1 CL = 50pF
Figure1 CL = 15pF
STCP to Qn
Figure1 CL = 50pF
74AHC594
Document number: DS35484 Rev. 3 - 2
VCC
Min
TA = +25°C
Typ
Max
-40°C to +85°C
-40°C to +125°C
Min
Max
Min
Max
3.0V to 3.6V
80
125

70

65

4.5V to 5.5V
90
70

80

70

3.0V to 3.6V
6.0


6.5

7.0

4.5V to 5.5V
5.5


6.0

6.5

3.0V to 3.6V
5.0


5.0

5.5

4.5V to 5.5V
5.0


5.2

5.7

3.0V to 3.6V
3.5


3.5

3.5

4.5V to 5.5V
3.0


3.0

3.0

3.0V to 3.6V
8.0


9.0

9.5

4.5V to 5.5V
5.0


5.0

5.5

3.0V to 3.6V
8.0


8.5

9.0

4.5V to 5.5V
5.0


5.0

5.5

3.0V to 3.6V
1.5


1.5

1.5

4.5V to 5.5V
2.0


2.0

2.0

3.0V to 3.6V
4.2


4.8

5.3

4.5V to 5.5V
2.9


3.3

3.8

3.0V to 3.6V
4.6


5.3

5.8

4.5V to 5.5V
3.2

8.5
3.7
4.3

10.6
3.0V to 3.6V


5.2
2.2

9.7
4.5V to 5.5V

3.8
6.3
1.7
7.2
1.7
7.8
3.0V to 3.6V

7.4
11.5
3.0
13.2
3.0
14.3
4.5V to 5.5V

4.8
8.0
2.4
9.1
2.4
10.0
3.0V to 3.6V

5.1
8.3
2.3
9.5
2.3
10.6
4.5V to 5.5V

3.5
5.7
1.8
6.5
1.8
7.1
3.0V to 3.6V

7.3
11.9
3.3
13.6
3.3
14.7
4.5V to 5.5V

4.8
7.8
2.6
9.0
2.6
9.8
5 of 11
www.diodes.com
2.2
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
June 2013
© Diodes Incorporated
74AHC594
Switching Characteristics (cont.)
Symbol /
Parameter
Pins
Test Conditions
Figure 1 CL = 15pF
SHCP toQ7S
Figure 1 CL = 50pF
Figure 1 CL = 15pF
STCP to Qn
tPHLH
HIGH to LOW
Propagation
Delay
Figure 1 CL = 50pF
SHR to
Q7S
STR
to Qn
Figure 1 CL = 15pF
Figure 1 CL = 50pF
Figure 1 CL = 15pF
Figure 1 CL = 50pF
SHR to Q7S
Figure 1
tPHL
Propagation
Delay
STR to Qn
tTHL
Transition
Time
Figure 1
Serial data
output Q7S
Figure 1
Parallel Data
Outputs QN
Figure 1
VCC
Min
TA = +25°C
Typ
Max
-40°C°C to +85°C -40°C°C to +125°C
Min
Max
Min
Max
11.0
3.0V to 3.6V

5.5
8.9
2.3
10.2
2.3
4.5V to 5.5V

4.1
6.7
1.9
7.6
1.9
8.2
3.0V to 3.6V

7.4
12.1
3.0
13.9
3.0
15.1
4.5V to 5.5V

5.4
8.8
2.5
10.1
2.5
11.0
3.0V to 3.6V

5.5
9.1
2.4
10.4
2.4
11.3
4.5V to 5.5V

3.7
6.0
1.9
6.9
1.9
7.5
3.0V to 3.6V

7.3
12.0
3.2
13.8
3.2
15.0
4.5V to 5.5V

5.2
8.5
2.6
9.7
2.6
10.5
3.0V to 3.6V

5.7
9.5
2.3
10.8
2.3
11.7
4.5V to 5.5V

4.1
6.7
2.0
7.6
2.0
8.2
3.0V to 3.6V

7.5
12.2
3.6
14.0
3.6
15.2
4.5V to 5.5V

5.4
8.8
2.8
10.1
2.8
11.0
3.0V to 3.6V

4.1
7.2
2.2
8.2
2.2
8.9
4.5V to 5.5V

4.1
7.2
2.2
8.2
2.2
8.9
3.0V to 3.6V

5.4
9.4
3.0
10.7
3.0
11.6
4.5V to 5.5V

5.4
9.4
3.0
10.7
3.0
11.6
2.0V

39
150

185

225
4.5V

14
30

37

45
5.0V

11


12


31

6.0V

26


38
2.0V

39
125

155

185
4.5V

14
25

31

37
5.0V

11


6.0V

12

21


26


31
2.0V

19
75

95

110
4.5V

7
15

19

22
6.0V

6
13

16

19
2.0V

14
60

75

90
4.5V

5
12

15

18
6.0V

4
10

13

15
Unit
ns
ns
ns
ns
ns
ns
ns
ns
Operating Characteristics (@TA = +25°C, unless otherwise specified.)
Parameter
Cpd
Power dissipation
capacitance
74AHC594
Document number: DS35484 Rev. 3 - 2
Test
Conditions
VCC = 5V
f = 1 MHz all outputs switching-no load
51
6 of 11
www.diodes.com
Typ
Unit
pF
June 2013
© Diodes Incorporated
74AHC594
Parameter Measurement Information
VCC
Inputs
VI
4.5V
VCC
tr/tf
6ns
5.0V
VCC
6ns
Voltage Waveform
Pulse Duration and Recovery Time
VM
VCC/2
VCC/2
Voltage Waveform
Set-up and Hold Times
Voltage Waveform
Propagation Delay Times
Inverting and Non Inverting Outputs
Notes:
A. Includes test lead and test apparatus capacitance.
B. All pulses are supplied at pulse repetition rate ≤ 10MHz.
C. Inputs are measured separately one transition per measurement.
D. tPLH and tPHL are the same as tPD.
Figure 1 Load Circuit and Voltage Waveforms
74AHC594
Document number: DS35484 Rev. 3 - 2
7 of 11
www.diodes.com
June 2013
© Diodes Incorporated
74AHC594
Ordering Information
Note:
Part Number
Package Code
Packaging
74AHC594S16-13
74AHC594T16-13
S16
T16
SO-16
TSSOP-16
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
74AHC594S16
74AHC594T16
74AHC594
Document number: DS35484 Rev. 3 - 2
8 of 11
www.diodes.com
Package
SO-16
TSSOP-16
June 2013
© Diodes Incorporated
74AHC594
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

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
DETAIL 'A'
74AHC594
Document number: DS35484 Rev. 3 - 2
9 of 11
www.diodes.com
June 2013
© Diodes Incorporated
74AHC594
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
Pin 1
Dimensions
C
X
X1
Y
Y1
Value (in mm)
1.270
0.670
9.560
1.450
6.400
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)
74AHC594
Document number: DS35484 Rev. 3 - 2
C
10 of 11
www.diodes.com
June 2013
© Diodes Incorporated
74AHC594
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
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
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales
channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
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.
LIFE SUPPORT
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
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or
systems.
Copyright © 2013, Diodes Incorporated
www.diodes.com
74AHC594
Document number: DS35484 Rev. 3 - 2
11 of 11
www.diodes.com
June 2013
© Diodes Incorporated