Data Sheet

3 www.fairchildsemi.com
MM74HC540 • MM74HC541
AC Electrical Characteristics
V
CC
5V, T
A
25 C, t
r
t
f
6 ns
AC Electrical Characteristics
V
CC
2.0V to 6.0V, C
L
50 pF, t
r
t
f
6 ns (unless otherwise specified)
Note 5: C
PD
determines the no load dynamic power consumption, P
D
C
PD
V
CC
2
f I
CC
V
CC
, and the no load dynamic current consumption,
I
S
C
PD
V
CC
f I
CC
.
Symbol Parameter Conditions Typ
Guaranteed
Units
Limit
t
PHL
, t
PLH
Maximum Propagation C
L
45 pF 12 18 ns
Delay (540)
t
PHL
, t
PLH
Maximum Propagation C
L
45 pF 14 20 ns
Delay (541)
t
PZH
, t
PZL
Maximum Output Enable R
L
1 k 17 28 ns
Time C
L
45 pF
t
PHZ
, t
PLZ
Maximum Output Disable R
L
1 k 15 25 ns
Time C
L
5 pF
Symbol Parameter Conditions
V
CC
T
A
25 CT
A
40 to 85 CT
A
55 to 125 C
Units
Typ Guaranteed Limits
t
PHL
, t
PLH
Maximum Propagation C
L
50 pF 2.0V 55 100 126 149 ns
Delay (540) C
L
150 pF 2.0V 83 150 190 224 ns
C
L
50 pF 4.5V 12 20 25 30 ns
C
L
150 pF 4.5V 22 30 38 45 ns
C
L
50 pF 6.0V 11 17 21 25 ns
C
L
150 pF 6.0V 18 26 32 38 ns
t
PHL
, t
PLH
Maximum Propagation C
L
50 pF 2.0V 58 115 145 171 ns
Delay (541) C
L
150 pF 2.0V 83 165 208 246 ns
C
L
50 pF 4.5V 14 23 29 34 ns
C
L
150 pF 4.5V 17 33 42 49 ns
C
L
50 pF 6.0V 11 20 25 29 ns
C
L
150 pF 6.0V 14 28 35 42 ns
t
PZH
, t
PZL
Maximum Output Enable R
L
1 k
Time C
L
50 pF 2.0V 75 150 189 224 ns
C
L
150 pF 2.0V 100 200 252 298 ns
C
L
50 pF 4.5V 15 30 38 45 ns
C
L
150 pF 4.5V 30 40 50 60 ns
C
L
50 pF 6.0V 13 26 32 38 ns
C
L
150 pF 6.0V 17 34 43 51 ns
t
PHZ
, t
PLZ
Maximum Output Disable R
L
1 k 2.0V 75 150 189 224 ns
Time C
L
50 pF 4.5V 15 30 38 45 ns
6.0V 13 26 32 38 ns
t
THL
, t
TLH
Maximum Output Rise C
L
50 pF 2.0V 25 60 75 90 ns
and Fall Time 4.5V 7 12 15 18 ns
6.0V 6 10 13 15 ns
C
PD
Power Dissipation G V
IH
10 pF
Capacitance (Note 5) G V
IL
50 pF
C
IN
Maximum Input 5 10 10 10 pF
Capacitance
C
OUT
Maximum Output Capacitance 15 20 20 20 pF