HD74LS194AP 查看數據表（PDF） - Renesas Electronics
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HD74LS194AP Datasheet PDF : 8 Pages
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HD74LS194A
Testing Table
Inputs
Item From input to output
CLR
S1
S0
CK
L
R
A
B
C
D
right-shift
ƒmax left-shift
4.5V 4.5V GND IN 4.5V IN GND GND GND GND
4.5V GND 4.5V IN
IN 4.5V GND GND GND GND
Clear→Q
tPLH
tPHL Clock→Q
IN 4.5V 4.5V IN GND GND 4.5V 4.5V 4.5V 4.5V
4.5V 4.5V GND IN 4.5V IN GND GND GND GND
4.5V 4.5V GND IN
IN 4.5V GND GND GND GND
Item From input to output
right-shift
ƒmax left-shift
Clear→Q
tPLH
tPHL Clock→Q
QA
OUT
OUT
OUT
OUT
OUT
QB
OUT
OUT
OUT
OUT
OUT
Outputs
QC
OUT
OUT
OUT
OUT
OUT
QD
OUT
OUT
OUT
OUT
OUT
Waveforms 1
(ƒmax, CK→Q)
tTLH
tTHL
tn tn+1
tn tn+1
Notes:
CK
L, R
90% 90%
10% 1.3V 1.3V 10%
1.3V
tw (CK)
tsu th
tsu
tTHL
1.3V
90%
1.3V
10%
tPHL
tPLH
3V
1.3V
th
1.3V
0V
tTLH
90%
3V
10% 1.3V
0V
tPHL
tPLH
VOH
Q
1.3V
1.3V
1.3V
1.3V
VOL
1. Right-shift is measured with QA at tn + 1, QB at tn + 2, QC at tn + 3, and QD at tn + 4. Left-shift is
measured with QA at tn + 4, QB at tn + 3, QC at tn + 2, and QD at tn + 1.
Rev.3.00, Jul.15.2005, page 5 of 7
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