CD74HC4538-Q1 Datasheet, PDF (6/16 Pages) Texas Instruments – HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR

CD74HC4538-Q1
HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE
PRECISION MONOSTABLE MULTIVIBRATOR
SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
LOAD
(OUTPUT) CAPACITANCE
V_CC
A, B
Q or Q
C_L = 50 pF
C_L = 15 pF
t_pd
R
Q or Q
C_L = 50 pF
C_L = 15 pF
t_t
C_L = 50 pF
τ^†
C_L = 50 pF
† _{Output pulse width with RX = 10 kΩ and CX = 0.1 µF}
2V
4.5 V
6V
5V
2V
4.5 V
6V
5V
2V
4.5 V
6V
3V
5V
T_A = 25°C
MIN TYP MAX
250
50
43
21
250
50
43
21
75
15
13
0.64
0.78
0.63
0.77
T_A = −40°C
TO 85°C
MIN MAX
315
63
54
315
63
54
0.612
0.602
95
19
16
0.812
0.798
T_A = −40°C
TO 125°C
MIN MAX
375
75
64
375
75
64
0.605
0.595
110
22
19
0.819
0.805
UNIT
ns
ns
ms
operating characteristics, V_CC = 5 V, T_A = 25°C, input t_r, t_f = 6 ns, C_L = 15 pF
PARAMETER
C_pd Power dissipation capacitance (see Note 6)
NOTE 6:
C_pd is used to determine the dynamic power consumption, per one shot.
P_D = (C_pd + C_X) V_CC2 f_I Σ(C_L V_CC2 f_O)
f_I = input frequency
f_O = output frequency
C_L = output load capacitance
C_X = external capacitance
V_CC = supply voltage, assuming f_I % l/τ
TYP UNIT
136 pF
6
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