MC74HC4538A_05 Datasheet, PDF (6/16 Pages) ON Semiconductor – Dual Precision Monostable Multivibrator (Retriggerable,Resettable)

MC74HC4538A
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ OUTPUT PULSE WIDTH CHARACTERISTICS (C_L = 50 pF)t
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Conditions
Guaranteed Limits
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Symbol
Parameter
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ τ
Output Pulse Width*
(Figures 6 and 8)
Timing Components
–55 to 25_C
V_CC
v 85_C
v 125_C
V
Min Max Min Max Min Max Unit
R_x = 10 kW, C_x = 0.1 mF 5.0 0.63 0.77 0.6 0.8 0.59 0.81 ms
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _−
Pulse Width Match Between
−
−
± 5.0
%
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Circuits in the same Package}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _−
Pulse Width Match Variation
−
−
± 10
%
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ (Part to Part)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{*For output pulse widths greater than 100 ms, typically τ = kRxCx, where the value of k may be found in Figure 3.}
0.8
T_A = 25°C
0.7
0.6
0.5
0.4
0.3
1
2
3
4
5
6
7
V_CC, POWER SUPPLY VOLTAGE (VOLTS)
Figure 3. Typical Output Pulse Width Constant,
k, versus Supply Voltage
(For output pulse widths > 100 ms: τ = kR_xC_x)
10 s
1s
100 ms
V_CC = 5 V, T_A = 25°C
10 ms
1 ms
100 ms 1 MW
10 ms ^{100 kW}
1 ms ^{10 kW}
100 ns ^{1 kW}
0.00001 0.0001 0.001 0.01 0.1
1
CAPACITANCE (mF)
10 100
Figure 4. Output Pulse Width versus Timing Capacitance
1.1
R_x = 100 kW
1 ^{Cx = 1000 pF}
T_A = 25°C
0.9
0.8
R_x = 1 MW
0.7
C_x = 0.1 mF
0.6
0.5
1
2
3
4
5
6
7
V_CC, POWER SUPPLY VOLTAGE (VOLTS)
Figure 5. Normalized Output Pulse Width versus Power Supply Voltage
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