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What is 74HC594?

This electronic component, produced by the manufacturer "Diodes", performs the same function as "8-BIT SHIFT REGISTER".


74HC594 Datasheet PDF - Diodes

Part Number 74HC594
Description 8-BIT SHIFT REGISTER
Manufacturers Diodes 
Logo Diodes Logo 


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74HC594
8-BIT SHIFT REGISTER WITH 8-BIT OUTPUT REGISTER
Description
The 74HC594 is a 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.
Pin Assignments
Q1
Q2
Q3
Q4
Q5
Q6
Q7
GND
( Top View )
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
Vcc
Q0
DS
STR
STCP
SHCP
SHR
Q7S
SO-16 / TSSOP-16
Features
Wide Supply Voltage Range from 2.0V to 6.0V
Sinks or sources 8mA at VCC= 4.5V
CMOS low power consumption
Schmitt Trigger Action at All Inputs
Inputs accept up to 6.0V
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)
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
74AHC594
Document number: DS35484 Rev. 3 - 2
1 of 10
www.diodes.com
June 2013
© Diodes Incorporated

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74HC594 equivalent
74HC594
Switching Characteristics
Symbol /
Parameter
Pins Test Conditions
fMAX
Maximum
Frequency
SHCP or
STCP
Figure 2
tW
Pulse Width
SHCP
HIGH or
LOW
STCP
HIGH or
LOW
SHR and
STR
HIGH or
LOW
DS to
SHCP
Figure 2
Figure 2
Figure 2
Figure 2
tSU
Set-up Time
SHR to
STCP
Figure 2
SHCP to
STCP
Figure 2
tPD
Propagation
Delay
SHCP to
Q7S
STCP to
Qn
Figure 2
Figure 2
tH
Hold Time
DS to
SHCP
tREC
Recovery Time
SHR to
SHCP and
STR to
STCP
tPHL
Propagation
Delay
SHR to
Q7S
STR to Qn
Figure 2
Figure 2
Figure 2
Figure 2
tTHL
Transition Time
Serial data
output Q7S
Parallel
Data
Outputs QN
Figure 2
Figure 2
74AHC594
Document number: DS35484 Rev. 3 - 2
VCC
2.0V
4.5V
5.0V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
5.0V
6.0V
2.0V
4.5V
5.0V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
5.0V
6.0V
2.0V
4.5V
5.0V
6.0V
2.0V
4.5V
6.0V
2.0V
4.5V
6.0V
TA = +25°C
Min Typ Max
6 30
30 92
100
35 109
80 10
16 4
14 3
80 10
16 4
14 3
80 14
16 5
14 4
100 10
20 4
17 3
100 14
20 5
17 4
100 17
20 6
17 5
44 150
16 30
13
14 26
44 150
16 30
13
14 26
25 -8
5 -3
4 -2
50 -14
10 -5
9 -4
39 150
14 30
11
12 26
39 125
14 25
11
12 21
19 75
7 15
6 13
14 60
5 12
4 10
5 of 10
www.diodes.com
-40°C to +85°C
Min Max
4.8
24
28
100
20
17
100
20
17
100
20
17
125
25
21
125
25
21
125
25
21
185
37

31
185
37

31
30
6
5
65
13
11
185
37

31
155
31

26
95
19
16
75
15
13
-40°C to +125°C
Min Max
4
20
24
120
24
20
120
24
20
120
24
20
150
30
26
150
30
26
150
30
26
225
45

38
225
45

38
35
7
6
75
15
13
225
45

38
185
37

31
110
22
19
90
18
15
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
June 2013
© Diodes Incorporated


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