CD74AC191 Datasheet, PDF (7/10 Pages) Texas Instruments – Presettable Synchronous 4-Bit Binary Up/Down Counter

CD74AC191, CD74ACT191
Switching Specifications Input t_r, t_f = 3ns, C_L = 50pF (Worst Case) (Continued)
-40^oC TO 85^oC
-55^oC TO 125^oC
PARAMETER
Propagation Delay
CE to RC
SYMBOL
V_CC (V)
MIN
t_PLH, t_PHL
1.5
-
3.3
4.4
TYP
MAX
MIN
TYP
MAX UNITS
-
137
-
-
151
ns
-
15.4
4.2
-
16.9
ns
5
3.1
-
11
3
-
12.1
ns
Input Capacitance
C_I
-
Power Dissipation Capacitance
C_PD
-
(Note 14)
-
-
10
-
-
10
pF
-
96
-
-
96
-
pF
ACT TYPES
Propagation Delay
PL to Qn
t_PLH, t_PHL
5
4.2
(Note 13)
-
14.8
4.1
-
16.3
ns
Propagation Delay
Pn to Qn
t_PLH, t_PHL
5
3.9
-
13.8
3.8
-
15.2
ns
Propagation Delay
CP to Qn
t_PLH, t_PHL
5
4.1
-
14.5
4
-
16
ns
Propagation Delay
CP to RC
t_PLH, t_PHL
5
3.1
-
10.9
3
-
12
ns
Propagation Delay
CP to TC
t_PLH, t_PHL
5
5.2
-
18.2
5
-
20
ns
Propagation Delay
U/D to RC
t_PLH, t_PHL
5
5.6
-
19.7
5.4
-
21.7
ns
Propagation Delay
U/D to TC
t_PLH, t_PHL
5
3.8
-
13.5
3.7
-
14.9
ns
Propagation Delay
CE to RC
t_PLH, t_PHL
5
3.3
-
11.5
3.2
-
12.7
ns
Input Capacitance
C_I
-
Power Dissipation Capacitance
C_PD
-
(Note 14)
-
-
10
-
-
10
pF
-
96
-
-
96
-
pF
NOTES:
11. Limits tested 100%.
12. 3.3V Min is at 3.6V, Max is at 3V.
13. 5V Min is at 5.5V, Max is at 4.5V
14. C_PD is used to determine the dynamic power consumption per package.
P_D = C_PDV_CC2 f_i + (C_L + V_CC2 f_o) where f_i = input frequency, f_o = output frequency, C_L = output load capacitance, V_CC = supply voltage.
CP
Qn OR TC
1/f_MAX
t_W
V_S
t_PHL
t_PLH
V_S
INPUT LEVEL
V_S
V_S
FIGURE 1.
CP OR CE
RC
V_S
t_PHL
V_S
INPUT LEVEL
V_S
t_PLH
V_S
FIGURE 2.
7