74VHC574 查看數據表（PDF） - STMicroelectronics
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74VHC574 Datasheet PDF : 14 Pages
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74VHC574
Figure 2: Input Equivalent Circuit
Table 3: Truth Table
OE
H
L
L
L
X : Don’t Care
Z : High Impedance
Figure 3: Logic Diagram
INPUTS
CK
X
Table 2: Pin Description
PIN N°
1
2, 3, 4, 5, 6,
7, 8, 9
12, 13, 14,
15, 16, 17,
18, 19
11
10
20
SYMBOL
OE
D0 to D7
NAME AND FUNCTION
3-State Output Enable
Input (Active LOW)
Data Inputs
Q0 to Q7 3-State Outputs
CK
GND
VCC
Clock Input (LOW-to-HIGH
Edge Triggered)
Ground (0V)
Positive Supply Voltage
OUTPUT
D
Q
X
Z
X
NO CHANGE
L
L
H
H
This logic diagram has not be used to estimate propagation delays
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