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CD74HC123 Datasheet(Fiches technique) 7 Page - Harris Corporation

Numéro de pièce CD74HC123
Description  High Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets
Télécharger  7 Pages
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Fabricant  HARRIS [Harris Corporation]
Site Internet  http://www.harris.com
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CD74HC123 Datasheet(HTML) 7 Page - Harris Corporation

   
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7
Test Circuits and Waveforms
FIGURE 1. OUTPUT PULSE CONTROL USING RESET INPUT
(R) PULSE FOR 123
FIGURE 2. OUTPUT PULSE CONTROL USING RESET INPUT
(R) FOR 423
FIGURE 3. TRIGGERING OF ONE SHOT BY INPUT A OR INPUT B FOR A PERIOD tW
FIGURE 4. TYPICAL OUTPUT PULSE WIDTH AS A FUNCTION
OF CX FOR RX = 10kΩ AND 100kΩ
FIGURE 5. TYPICAL “K” FACTOR AS A FUNCTION OF VCC
B = LOW
A = HIGH
tW
tW
VS
VS
Q
R
B
A
tW
tW
A
B
R
B = LOW
A = HIGH
Q
tW
VS
VS
tW
tW
A
B
B
A
Q
trT
(R = HIGH)
tW
tW
tW
tW
NOTE: Output pulse control using retrigger pulse for 123 and 423.
VS
2
4
6
8
103
102
101
2
4
6
8
2
4
6
8
2
4
6
8
EXTERNAL CAPACITANCE (CX) - pF
24 6 8
103
104
2
4 68
2
4 68
2
4 68
105
106
107
R X
=
100k
R X
=
10k
DC SUPPLY VOLTAGE (VCC) = 5V
AMBIENT TEMPERATURE (TA) = 25
oC
EXTERNAL CAPACITANCE (CX) = 10nF
EXTERNAL RESISTANCE (RX) = 10kΩ TO 100kΩ
AMBIENT TEMPERATURE (TA) = 25
oC
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
12
3
4
5
6
7
8
9
10
11
HCT
DC SUPPLY VOLTAGE (VCC) - VOLTS
CD74HC123, CD74HCT123, CD74HC423, CD74HCT423


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