74AHC164 반도체 회로 부품 판매점

8-BIT PARALLEL-OUT SERIAL SHIFT REGISTERS



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Diodes
74AHC164 데이터시트, 핀배열, 회로
74AHC164
8-BIT PARALLEL-OUT SERIAL SHIFT R4E0G0ISTERS
Description
The 74AHC164 is a serial input 8-bit edge-triggered shift register that
has outputs from each of eight stages.
SERIAL DATA INPUT PINS
The serial input data is entered at pin SDA or pin SDB as these are
logically ANDED. Either input could be used as an active HIGH
enable with data entry on the other pin. If a single input is desired, the
pins can be tied together or the unused input can be tied HIGH.
DATA ENTRY
Data is shifted into Q0 from the serial input pins on each LOW to
HIGH transition of the CP pin. Also during the CP edge the data is
transferred from each Qn to Qn+1. The serial data on pins DSA and
DSB must be stable before and after the CP rising edge to meet the
set-up and hold timing requirements.
RESET
When asserted LOW the Master Reset ( MR ) pin sets all Qn to LOW.
This action does not depend on the condition of serial input or clock
pins. The MR must be asserted HIGH for a recovery time before the
next CP positive edge pulse.
Pin Assignments
DSA
DSB
Q0
Q1
Q2
Q3
GND
( Top View )
1 14
2 13
3 12
4 11
5 10
69
78
Vcc
Q7
Q6
Q5
Q4
MR
CP
SO-14 / TSSOP-14 / PDIP-14
Features
Wide Supply Voltage Range from 2.0V to 5.5V
Sinks or Sources 8mA at VCC = 4.5V
CMOS Low Power Consumption
Schmitt Trigger Action at All Inputs
ESD Protection Exceeds JESD 22
200-V Machine Model (A115)
2000-V Human Body Model (A114)
Exceeds 1000-V Charged Device Model (C101)
Range of Package Options SO-14 and TSSOP-14
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
General Purpose Logic
Wide Array of Products Such as:
PCs, Networking, Notebooks, Netbooks
Computer Peripherals, Hard Drives, CD/DVD ROMs
TVs, DVDs, DVRs, Set-Top Boxes
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.
Device ordering information is on page 7
74AHC164
Document number: DS36281 Rev. 2 - 2
1 of 11
www.diodes.com
August 2015
© Diodes Incorporated

74AHC164 데이터시트, 핀배열, 회로
Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin Name
DSA
DSB
Q0
Q1
Q2
Q3
GND
CP
MR
Q4
Q5
Q6
Q7
VCC
74AHC164
400
Function
Serial Data Input
Serial Data Input
Data Output
Data Output
Data Output
Data Output
Ground
Clock Pulse Positive Edge Triggered
Master Reset - Asynchronous
Data Output
Data Output
Data Output
Data Output
Supply Voltage
Function Table (Note 4)
Mode
MR
Input
CP DSA
DSB
Output
Q0 Q1-Q7
Reset
L
X
X
X
L
L
H L X L Qn←Qn-1 (n= 1 to7)
Shift
H
X
L
L Qn←Qn-1 (n= 1 to7)
H H H H Qn←Qn-1 (n= 1 to7)
Note:
4. Signals asserted on DSA and DSB must be in place longer than Tsu (set up time) before CP occurs and remain in place Thold (hold time) after CP.
74AHC164
Document number: DS36281 Rev. 2 - 2
2 of 11
www.diodes.com
August 2015
© Diodes Incorporated




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74AHC164 register

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