参数资料
型号: MC74AC564DW
厂商: ON SEMICONDUCTOR
元件分类: 总线收发器
英文描述: AC SERIES, 8-BIT DRIVER, INVERTED OUTPUT, PDSO20
封装: PLASTIC, SOIC-20
文件页数: 2/9页
文件大小: 183K
代理商: MC74AC564DW
MC74AC564 MC74ACT564
http://onsemi.com
2
FUNCTIONAL DESCRIPTION
The MC74AC564/74ACT564 consists of eight edge-
triggered flip-flops with individual D-type inputs and
3-state complementary outputs. The buffered clock and
buffered Output Enable are common to all flip-flops. The
eight flip-flops will store the state of their individual D
inputs that meet the setup and hold times requirements on
the LOW-to-HIGH Clock (CP) transition. With the Output
Enable (OE) LOW, the contents of the eight flip-flops are
available at the outputs. When OE is HIGH, the outputs go
to the high impedance state. Operation of the OE input does
not affect the state of the flip-flops.
FUNCTION TABLE
Inputs
Internal Outputs
Function
OE
CP
D
Q
O
H
L
NC
Z
Hold
H
HH
NC
Z
Hold
H
LH
Z
Load
H
HL
Z
Load
L
LH
H
Data Available
L
HL
L
Data Available
L
HL
NC
No Change in Data
L
H
NC
No Change in Data
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
= LOW-to-HIGH Transition
NC = No Change
Figure 3. Logic Diagram
D0
D1
D2
D3
D4
D5
D6
D7
CD
Q
O0
O1
O2
O3
O4
O5
O6
O7
OE
CP
CD
Q
CD
Q
CD
Q
CD
Q
CD
Q
CD
Q
CD
Q
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
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