TC74VHC540,541F/FT/FK
2014-03-01
5
AC Characteristics
(input: t
r
= t
f
= 3 ns)
Test Condition Ta = 25°C
Ta =
−40 to 85°C
Characteristics Symbol
V
CC
(V) C
L
(pF) Min Typ. Max Min Max
Unit
15 ― 4.8 7.0 1.0 8.5
3.3 ± 0.3
50 ― 7.3 10.5 1.0 12.0
15 ― 3.7 5.0 1.0 6.0
Propagation delay
time
(TC74VHC540)
t
pLH
t
pHL
―
5.0 ± 0.5
50 ― 5.2 7.0 1.0 8.0
ns
15 ― 5.0 7.0 1.0 8.5
3.3 ± 0.3
50 ― 7.5 10.5 1.0 12.0
15 ― 3.5 5.0 1.0 6.0
Propagation delay
time
(TC74VHC541)
t
pLH
t
pHL
―
5.0 ± 0.5
50 ― 5.0 7.0 1.0 8.0
ns
15 ― 6.8 10.5 1.0 12.5
3.3 ± 0.3
50 ― 9.3 14.0 1.0 16.0
15 ― 4.7 7.2 1.0 8.5
3-state output enable
time
t
pZL
t
pZH
R
L
= 1 kΩ
5.0 ± 0.5
50 ― 6.2 9.2 1.0 10.5
ns
3.3 ± 0.3 50 ― 11.2 15.4 1.0 17.5
3-state output disable
time
t
pLZ
t
pHZ
R
L
= 1 kΩ
5.0 ± 0.5 50 ― 6.0 8.8 1.0 10.0
ns
3.3 ± 0.3 50 ― ― 1.5 ― 1.5
Output to output skew
t
osHL
t
osLH
(Note 1)
5.0 ± 0.5 50 ― ― 1.0 ― 1.0
ns
Input capacitance C
IN
― ― 4 10 ― 10 pF
Output capacitance C
OUT
― ― 6 ― ― ― pF
TC74VHC540 ― 17 ― ― ―
Power dissipation
capacitance (Note 2)
C
PD
TC74VHC541 ― 18 ― ― ―
pF
Note 1: Parameter guaranteed by design.
t
osLH
= |t
pLHm
− t
pLHn
|, t
osHL
= |t
pHLm
− t
pHLn
|
Note 2: C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
I
CC (opr)
= C
PD
·V
CC
·f
IN
+ I
CC
/8 (per bit)
Noise Characteristics
(input: t
r
= t
f
= 3 ns)
Test Condition Ta = 25°C
Characteristics Symbol
V
CC
(V) Typ. Limit
Unit
Quiet output maximum dynamic
V
OL
V
OLP
C
L
= 50 pF 5.0 0.7 1.0 V
Quiet output minimum dynamic
V
OL
V
OLV
C
L
= 50 pF 5.0 −0.7 −1.0 V
Minimum high level dynamic input
voltage
V
IHD
C
L
= 50 pF 5.0 ― 3.5 V
Maximum low level dynamic input
voltage
V
ILD
C
L
= 50 pF 5.0 ― 1.5 V