Datasheet
74LV14 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 6 — 12 December 2011 6 of 19
NXP Semiconductors
74LV14
Hex inverting Schmitt trigger
11. Dynamic characteristics
[1] All typical values are measured at T
amb
=25C.
[2] t
pd
is the same as t
PLH
and t
PHL
.
[3] Typical values are measured at nominal supply voltage (V
CC
= 3.3 V).
[4] C
PD
is used to determine the dynamic power dissipation (P
D
in W).
P
D
=C
PD
V
CC
2
f
i
N+(C
L
V
CC
2
f
o
) where:
f
i
= input frequency in MHz, f
o
= output frequency in MHz
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
N = number of inputs switching
(C
L
V
CC
2
f
o
) = sum of the outputs.
12. Waveforms
Table 7. Dynamic characteristics
GND = 0 V; For test circuit see Figure 7.
Symbol Parameter Conditions T
amb
= 40 C
to +85 C
T
amb
= 40 C
to +125 C
Unit
Min Typ
[1]
Max Min Max
t
pd
propagation delay nA to nY; see Figure 6
[2]
V
CC
= 1.2 V - 80 - - - ns
V
CC
= 2.0 V - 27 37 - 48 ns
V
CC
= 2.7 V - 20 28 - 35 ns
V
CC
= 3.0 V to 3.6 V; C
L
=15pF
[3]
-13- - -ns
V
CC
= 3.0 V to 3.6 V
[3]
- 15 22 - 28 ns
V
CC
= 4.5 V to 5.5 V - - 18 - 23 ns
C
PD
power dissipation
capacitance
C
L
=50pF; f
i
= 1 MHz;
V
I
=GNDtoV
CC
[4]
-15- - -pF
Measurement points are given in Table 8.
V
OL
and V
OH
are typical voltage output levels that occur with the output load.
Fig 6. The input (nA) to output (nY) propagation delays
mna344
t
PHL
t
PLH
V
M
V
M
V
M
V
M
nA input
nY output
GND
V
I
V
OH
V
OL