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74HC594 Datasheet

8-BIT SHIFT REGISTER

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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


Diodes Semiconductor Electronic Components Datasheet

74HC594 Datasheet

8-BIT SHIFT REGISTER

No Preview Available !

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
SHR
SHCP
STCP
STR
DS
Q0
VCC
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
Shift Register Reset active low
Shift Register Clock Input
Storage Register Clock Input
Storage Register Reset active low
Serial Data input
Parallel Data Output 0
Supply Voltage
Functional Diagram
Logic Diagram
DS
SHCP
SHR
STCP
STR
STAGE 0
DQ
FF0
CP
R
STAGES 1 TO 6
DQ
STAGE 7
DQ
FF7
CP
R
DQ
LATCH
CP
R
DQ
LATCH
CP
R
74HC594
Q0 Q1 Q2 Q3 Q4 Q5 Q6
Q7
74AHC594
Document number: DS35484 Rev. 3 - 2
2 of 10
www.diodes.com
June 2013
© Diodes Incorporated


Part Number 74HC594
Description 8-BIT SHIFT REGISTER
Maker Diodes
Total Page 10 Pages
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