CD74HC123 Datasheet, PDF (6/8 Pages) Texas Instruments – High Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets

CD74HC123, CD74HCT123, CD74HC423, CD74HCT423
Switching Specifications C_L = 50pF, Input t_r, t_f = 6ns, R_X = 10KΩ, C_X = 0
PARAMETER
HC TYPES
Trigger Propagation Delay
A, B, R to Q
TEST
25^oC
SYMBOL CONDITIONS V_CC (V) MIN TYP MAX
t_PHL
C_L = 50pF
2
-
- 300
-40^oC TO
85^oC
MIN MAX
-
375
4.5
-
-
60
-
75
A, B, R to Q
t_PHL
C_L = 15pF
5
C_L = 50pF
6
C_L = 50pF
2
4.5
-
25
-
-
-
-
-
51
-
64
-
-
320
-
400
-
-
64
-
80
Reset Propagation Delay
R to Q or Q
C_L = 15pF
5
C_L = 50pF
6
t_PHL, t_PLH C_L = 50pF
2
4.5
-
26
-
-
-
-
-
54
-
68
-
-
215
-
270
-
-
43
-
54
6
-
-
37
-
46
Output Transition Time
t_THL, t_TLH C_L = 50pF
2
-
-
75
-
95
4.5
-
-
15
-
19
6
-
-
13
-
16
-55^oC TO
125^oC
MIN MAX UNITS
-
450 ns
-
90
ns
-
-
ns
-
76
ns
-
480 ns
-
96
ns
-
-
ns
-
82
ns
-
325 ns
-
65
ns
-
55
ns
-
110 ns
-
22
ns
-
19
ns
Output Pulse Width
-
R_X = 10KΩ, C_X = 10pF
-
5
-
45
-
-
-
-
-
µs
Pulse Width Match Between
Circuits In the Same Package
-
R_X = 10KΩ, C_X = 10pF
-
5
-
±2
-
-
-
-
-
%
Power Dissipation Capacitance C_PD
C_L = 15pF
5
-
-
-
-
-
-
-
pF
Input Capacitance
C_IN
C_L = 50pF
-
10
-
10
-
10
-
10
pF
NOTES:
5. C_PD is used to determine the dynamic power consumption, per multivibrator.
6. P_D = (C_PD + C_X) V_CC2 f_i ∑(C_L V_CC2 f_O) where f_i = input frequency, f_O = Output Frequency, C_L = Output Load Capacitance,
C_X = External Capacitance V_CC = Supply Voltage assuming f_i « _t--W-^I_---
6