74AHC595
Document number: DS35486 Rev. 3 - 2
1 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
8-BIT SHIFT REGISTER WITH 8-BIT OUTPUT REGISTER
Description
The 74AHC595 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 (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 (OEሻ 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
Wide Supply Voltage Range from 2.0 V to 5.5V
Sinks or sources 8mA at VCC = 4.5V
CMOS low power consumption
Schmitt Trigger Action at All Inputs
Inputs Accept up to 5.5V
ESD Protection Tested per JESD 22
Exceeds 200-V Machine Model (A115-A)
Exceeds 2000-V Human Body Model (A114-A)
Exceeds 1000-V Charged Device Model (C101C)
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)
Pin Assignments
Applications
General Purpose Logic
Serial to Parallel Data conversion
Capture and hold data for extended periods of time
Allow simple serial bit streams from a microcontroller to control as
many peripheral lines as needed
Wide array of products such as:
Computer peripherals
Appliances
Industrial control
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
74AHC595
Document number: DS35486 Rev. 3 - 2
2 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
Pin Descriptions
Pin Number Pin Name Description
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 Parallel Data Output 7
8 GND Ground
9 Q7S Serial Data Output
10 MR Master Reset Input
11 SHCP Shift Register Clock Input
12 STCP Storage Register Clock Input
13 OE Output Enable Input
14 DS Serial Data Input
15 Q0 Parallel Data Output 0
16 Vcc Supply Voltage
Functional Diagram
Logic Diagram
74AHC595
Document number: DS35486 Rev. 3 - 2
3 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
Functional Description and Timing Diagram
Control Input Output Function
SHCP STCP OE MR DS Q7S Qn
X X L L L NC
Low-level asserted on MR clears shift register.
Storage register is unchanged
X L L L L
Empty shift register transferred to storage register
X X H L L Z
Shift register remains clear;: All Q ouputs in Z state.
X L H Q6S NC
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
X L H NC QnS
Contents of shift register copied to storage register. With output now
in active state the storage resister contents appear on Q outputs.
L H Q6S QnS
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
SHCP
DS
STCP
MR
OE
Q0
Q1
Q6
Q7
Q7S
Z-state
Z-state
Z-state
Z-state
74AHC595
Document number: DS35486 Rev. 3 - 2
4 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.)
Symbol Parameter Rating Unit
ESD HBM Human Body Model ESD Protection 2 KV
ESD CDM Charged Device Model ESD Protection 1 KV
ESD MM Machine Model ESD Protection 200 V
VCC Supply Voltage Range -0.5 to 7.0 V
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
IOK Output Clamp Current VO <-0.5V -20 mA
IOK Output Clamp Current VO > VCC + 0.5V 25 mA
IO Continuous output current +/- 25 mA
ICC Continuous current through Vcc or GND 75 mA
IGND Continuous current through Vcc or GND -75 mA
TJ Operating Junction Temperature -40 to 150 °C
TSTG Storage Temperature -65 to 150 °C
PTOT Total Power Dissipation 500 mW
Note: 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 Parameter Conditions Min Max Unit
VCC Supply Voltage 2.0 5.5 V
VI Input Voltage 0 5.5 V
VO Output Voltage Active Mode 0 VCC V
Δt/ΔV Input transition Rise or Fall Rate VCC = 3.0V to 3.6V 100 ns/V
VCC = 4.5V to 5.5V 20
TA Operating Free-Air Temperature -40 +125 °C
Note: 5. Unused inputs should be held at VCC or Ground.
Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
Symbol Parameter Test Conditions VCC TA = +25°C TA = -40°C to +85°C TA = -40°C to +125°C Unit
Min Typ Max Min Max Min Max
VIH High-level Input
Voltage
2.0V 1.5 1.5 1.5
V
3.0V 2.1 2.1 2.1
5.5V 3.85 3.85 3.85
VIL Low-level input
voltage
2.0V 0.5 0.5 0.5
V
3.0V 0.9 0.9 0.9
5.5V 1.65 1.65 1.65
VOH High Level
Output Voltage
IOH = -50μA 2.0V 1.9 2.0 1.9 1.9
V
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
IOH = -8mA 4.5V 3.94 3.80 3.70
VOL Low-level
Output Voltage
IOL = 50μA 2.0V 0 0.1 0.1 0.1
V
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
IOL = 8mA 4.5V 0.36 0.44 0.55
II Input Current VI = GND to 5.5V 5.5V 0.1 ±0.1 ±1 ±2 μA
IOZ OFF-state
output current
VI = VIH or VIL;
VO = VCC or GND 5.5V ±0.25 ±2.5 ±10 μA
ICC Supply Current VI = GND or VCC IO =
0 5.5V 4.0 40 80 μA
Ci Input
Capacitance Vi = VCC or GND 5.5V 4 10 10 10 pF
74AHC595
Document number: DS35486 Rev. 3 - 2
5 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
Switching Characteristics
Symbol /
Parameter Pins Test Conditions VCC TA = +25°C -40°C to +85°C -40°C to +125°C Unit
Min Typ Max Min Max Min Max
fMAX
Maximum
Frequency
SHCP or STCP Figure 2
3.0V to 3.6V 80 125 60 40
MHz
4.5V to 5.5V 130 70 110 90
tW
Pulse Width
SHCP
HIGH or LOW Figure 2 3.0V to 3.6V 5.0 5.0 5.0
ns
4.5V to 5.5V 5.0 5.0 5.0
STCP
HIGH or LOW Figure 2 3.0V to 3.6V 5.0 5.0 5.0
4.5V to 5.5V 5.0 5.0 5.0
MR LOW Figure 2 3.0V to 3.6V 5.0 5.0 5.0
4.5V to 5.5V 5.0 5.0 5.0
tSU
Set-up Time
DS to SHCP Figure 2 3.0V to 3.6V 3.5 3.5 3.5 ns
4.5V to 5.5V 3.0 3.0 3.0
SHCP to STCP Figure 2 3.0V to 3.6V 8.5 8.5 8.5 ns
4.5V to 5.5V 5.0 5.0 5.0
tH
Hold Time DS to SHCP Figure 2 3.0V to 3.6V 1.5 1.5 1.5 ns
4.5V to 5.5V 2.0 2.0 2.0
tREC
Recovery Time MR to SHCP Figure 2 3.0V to 3.6V 3.0 3.0 3.0 ns
4.5V to 5.5V 2.5 2.5 2.5
tPD
Propagation
Delay
SHCP to Q7S
Figure 2
CL = 15pF
3.0V to 3.6V 5.7 13.0 1.0 15.0 1.0 16.5
ns
4.5V to 5.5V 4.0 8.2 1.0 9.4 1.0 10.5
Figure 2
CL = 50pF
3.0V to 3.6V 7.7 16.5 1.0 18.5 1.0 20.1
4.5V to 5.5V 5.4 10.0 1.0 11.4 1.0 12.5
STCP to Qn
Figure 2
CL = 15pF
3.0V to 3.6V 5.9 11.9 1.0 13.5 1.0 15.0
ns
4.5V to 5.5V 4.2 7.4 1.0 8.5 1.0 10.5
Figure 2
CL = 50pF
3.0V to 3.6V 7.7 15.4 1.0 17.0 1.0 18.5
4.5V to 5.5V 5.5 9.0 1.0 10.5 1.0 11.5
MR to Q7S
Figure 2
CL = 15pF
3.0V to 3.6V 5.9 12.8 1.0 13.7 1.0 15.0
ns
4.5 V to 5.5V 4.4 8.0 1.0 9.1 1.0 10.5
Figure 2
CL = 50pF
3.0V to 3.6V 7.4 16.3 1.0 17.2 1.0 18.7
4.5V to 5.5V 5.6 10.0 1.0 11.1 1.0 12.0
tEN
Enable Time OE to Qn
Figure 2
CL = 15pF
3.0V to 3.6V 5.6 11.5 1.0 13.5 1.0 15.0
ns
4.5V to 5.5V 4.0 8.6 1.0 10.0 1.0 10.5
Figure 2
CL = 50pF
3.0V to 3.6V 7.4 15.0 1.0 17.0 1.0 18.5
4.5V to 5.5V 5.3 10.6 1.0 12.0 1.0 13.0
tDIS
Disable Time OE to Qn
Figure 2
CL = 15pF
3.0V to 3.6V 5.4 11.0 1.0 13.0 1.0 14.5
ns
4.5V to 5.5V 3.8 8.0 1.0 9.5 1.0 10.5
Figure 2
CL = 50pF
3.0V to 3.6V 8.7 15.7 1.0 16.2 1.0 17.5
4.5V to 5.5V 5.8 10.3 1.0 11.0 1.0 12.0
Operating Characteristics (@TA = +25°C, unless otherwise specified.)
Parameter Test
Conditions VCC = 5V Unit
Typ
Cpd Power dissipation
capacitance f = 1 MHz all outputs switching-no load 42 pF
74AHC595
Document number: DS35486 Rev. 3 - 2
6 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
Parameter Measurement Information
RL
CL
(see Note A)
From Output
Under Test VLOAD
TEST Vload
tPLH/tPHL Open
tPLZ/tPZL V
CC
tPHZ/tPZH GND
Vcc Inputs VM C
L
VI t
r/tf
3.3V -3.6V VCC 3ns VCC/2 15pF, 50pF
4.5V to 5.5V VCC 3ns VCC/2 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 2. Load Circuit and Voltage Waveforms
74AHC595
Document number: DS35486 Rev. 3 - 2
7 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
Ordering Information
Part Number Package Code Packaging 7” Tape and Reel (Note 6)
Quantity Part Number Suffix
74AHC595S16-13 S16 SO-16 2500/Tape & Reel -13
74AHC595T16-13 T16 TSSOP-16 2500/Tape & Reel -13
Note: 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 Package
74AHC595S16 SO-16
74AHC595T16 TSSOP-16
74AHC595
Document number: DS35486 Rev. 3 - 2
8 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
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
Package Type: TSSOP-16
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
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
Θ0° 8° -
Θ1 5° 15° -
Θ2 0° - -
All Dimensions in mm
D
EH
L
A2
BeA1
A
C
Detail ‘A’
Detail ‘A’
Gauge Plane
PIN 1
eb
E
E/2
E1
A2
A
D
A1
X
Y
SEE DETAIL 'A'
SEATING PLANE
GAUGE
PLANE
R
L
L1
L2
Ø0.760Depth0.050±0.02
R1
x)
C
DETAIL 'A'
74AHC595
Document number: DS35486 Rev. 3 - 2
9 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
Package Type: SO-16
Package Type: TSSOP-16
Dimensions Value (in mm)
C 1.270
X 0.670
X1 9.560
Y 1.450
Y1 6.400
Dimensions Value (in mm)
C 0.650
X 0.350
X1 4.900
Y 1.400
Y1 6.800
X1
XC
Y
Y1
Pin 1
X1
Y (16x)
Y1
X (16x)
1
C
74AHC595
Document number: DS35486 Rev. 3 - 2
10 of 10
www.diodes.com June 2013
© Diodes Incorporated
74AHC595
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
