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HD74LS192 数据表(PDF) 6 Page - Renesas Technology Corp

部件名 HD74LS192
功能描述  Synchronous Up / Down Decade Counter (dual clock lines)
PDF  11 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

HD74LS192 数据表(HTML) 6 Page - Renesas Technology Corp

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



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