MC14553BCP 데이터 시트보기 (PDF) - ON Semiconductor
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MC14553BCP Datasheet PDF : 8 Pages
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MC14553B
UNITS CLOCK
UNITS Q0
UNITS Q1
UNITS Q2
UNITS Q3
TENS CLOCK
TENS Q0
TENS Q3
HUNDREDS
CLOCK
HUNDREDS Q0
HUNDREDS Q3
DISABLE (DISABLES CLOCK WHEN HIGH)
OVERFLOW
MASTER
RESET
SCAN
OSCILLATOR
DIGIT SELECT 1
DIGIT SELECT 2
DIGIT SELECT 3
UNITS
TENS
HUNDREDS
UP AT 80
UP AT 980
UP AT 800
Figure 2. 3−Digit Counter Timing Diagram (Reference Figure 4)
(a)
PULSE
GENERATOR
16 VDD
C
Q3
Q2
Q1
LE
Q0
O.F.
DIS
DS1
DS2
MR
DS3
8 VSS
(b)
GENERATOR
1
GENERATOR
2
GENERATOR
3
VDD
C
Q3
Q2
Q1
LE
Q0
O.F.
MR
DS1
DS2
DIS
DS3
VSS
CL
CL
CL
CL
CL
20 ns
CLOCK
90%
10%
tPLH
20 ns
BCD OUT
10% 90%
tTLH
OVERFLOW
tPHL
50%
tTHL
tTLH
CLOCK
50% 90%
10%
tsu
trem
CL
CL
LATCH
CL
ENABLE
CL
50%
tPHL, tPLH
CL
BCD OUT
50%
MASTER RESET
tWL(cl)
50%
1/fcl
tPHL
50%
tsu
tPHL
50%
Figure 3. Switching Time Test Circuits and Waveforms
tWH(R)
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