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74AHC595 PDF даташит

Спецификация 74AHC595 изготовлена ​​​​«Diodes» и имеет функцию, называемую «8-BIT SHIFT REGISTER».

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Номер произв 74AHC595
Описание 8-BIT SHIFT REGISTER
Производители Diodes
логотип Diodes логотип 

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74AHC595 Даташит, Описание, Даташиты
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 (OEasserted 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.
Pin Assignments
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)
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
1 of 10
www.diodes.com
June 2013
© Diodes Incorporated









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74AHC595 Даташит, Описание, Даташиты
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
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
Functional Diagram
74AHC595
74AHC595
Document number: DS35486 Rev. 3 - 2
2 of 10
www.diodes.com
June 2013
© Diodes Incorporated









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74AHC595 Даташит, Описание, Даташиты
74AHC595
Functional Description and Timing Diagram
Control
SHCP STCP OE
X XL
X L
X XH
MR
L
L
L
Input
DS
X LH
X LH
  LH
Output
Q7S
Qn
L NC
LL
LZ
Q6S
NC
NC
Q6S
QnS
QnS
Function
Low-level asserted on MR clears shift register.
Storage register is unchanged
Empty shift register transferred to storage register
Shift register remains clear;: All Q ouputs in Z state.
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.
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
3 of 10
www.diodes.com
June 2013
© Diodes Incorporated










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