HD74LS192 查看數據表（PDF） - Renesas Electronics
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HD74LS192 Datasheet PDF : 11 Pages
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HD74LS192
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
VCC
Up
Down
A
B
C
D
Load
Clear
Output
Borrow
Load circuit 1
RL
CL
Output
Carry
Same as Load Circuit 1.
Output
QA
Same as Load Circuit 1.
Output
QB
Same as Load Circuit 1.
Output
QC
Same as Load Circuit 1.
Output
QD
Same as Load Circuit 1.
Notes: 1. CL includes probe and jig capacitance.
2. All diodes are 1S2074(H).
Testing Table
Item From input to output
ƒmax
tPLH
tPHL
Note:
Up Count
Down Count
Load→Q
Clear→Q
*. For initialized
Item From input to output
ƒmax
Up Count
tPLH Down Count
tPHL Load→Q
Clear→Q
CLR
GND
GND
GND
GND
GND
IN
Load
4.5V
4.5V
4.5V
4.5V
IN
IN*
Up
IN
4.5V
IN
4.5V
GND
GND
Inputs
Down
A
4.5V
GND
IN
GND
4.5V
GND
IN
GND
GND
IN
GND
4.5V
B
GND
GND
GND
GND
IN
4.5V
C
GND
GND
GND
GND
IN
4.5V
D
GND
GND
GND
GND
IN
4.5V
QA
OUT
OUT
OUT
OUT
OUT
OUT
QB
OUT
OUT
OUT
OUT
OUT
OUT
Outputs
QC
QD
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
Carry
OUT
—
OUT
—
—
—
Borrow
—
OUT
—
OUT
—
—
Rev.2.00, Feb.18.2005, page 6 of 10
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