HD74HC164 PDF даташит
Спецификация HD74HC164 изготовлена «Hitachi Semiconductor» и имеет функцию, называемую «8-bit Parallel-out Shift Register». |
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Детали детали
Номер произв | HD74HC164 |
Описание | 8-bit Parallel-out Shift Register |
Производители | Hitachi Semiconductor |
логотип |
9 Pages
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HD74HC164
8-bit Parallel-out Shift Register
Description
This 8-bit shift register has gated serial inputs and clear. Each register bit is a D-type master/slave flip-
flop. Inputs A & B permit complete control over the incoming data. A low at either or both inputs inhibits
entry of new data and resets the first flip-vlop to the low level at the next clock pulse. A high level on the
input enables the other input which will then determine the state of the first flip-flop. Data at the serial
inputs may be changed while the clock is high or low, but only information meeting the setup and hold time
requirements will be entered. Data is serially shifted in and out of the 8-bit register during the positive
going transition of the clock pulse. Clear is independent of the clock and accomplished by a low level at
the clear input.
Features
• High Speed Operation: tpd (Clock to Q) = 14.5 ns typ (CL = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max
Function Table
Inputs
Outputs
Clear
Clock
A
B
QA QB ·········
L X X X L L ·········
H X X QAo QBo ·········
H L X L QAn ·········
H X L L QAn ·········
H H H H QAn ·········
QAo to QHo = Outputs remain unchanged.
QAn to QGn = Data shifted from the previous stage on a positive edge at the clock input.
QH
L
QHo
QGn
QGn
QGn
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HD74HC164
Pin Arrangement
Serial
Inputs
A1
B2
QA 3
Outputs
QB 4
QC 5
QD 6
GND 7
Timing Diagram
A
B QH
QA QG
QB QF
QC QE
QD CLR
CK
(Top view)
14 VCC
13 QH
12 QG
11 QF
Outputs
10 QE
9 Clear
8 Clock
Clock
A
B
Clear
QA
QB
QC
QD
QE
QF
QG
QH
2
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Logic Diagram
HD74HC164
Clock
A
B
Clear
DQ
CLR
DQ
CLR
DQ
CLR
DQ
CLR
DQ
CLR
DQ
CLR
DQ
CLR
DQ
CLR
QA QB QC QD QE QF QG QH
3
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DataSheet26.com | 2020 | Контакты | Поиск |