NXP Semiconductors
74HC125; 74HCT125
Quad buffer/line driver; 3-state
Table 7.
Dynamic characteristics
…continued
Voltages are referenced to GND (ground = 0 V); C
L
= 50 pF unless otherwise specified; for test circuit see
Figure 7.
Symbol Parameter
For type 74HCT125
t
pd
propagation
delay
nA to nY; see
V
CC
= 4.5 V
V
CC
= 5 V; C
L
= 15 pF
t
en
t
dis
t
t
C
PD
enable time
nOE to nY; see
V
CC
= 4.5 V
disable time nOE to nY; see
V
CC
= 4.5 V
transition
time
power
dissipation
capacitance
nY; see
C
L
= 50 pF; f = 1 MHz;
V
I
= GND to V
CC
Conditions
Min
25
C
Typ
Max
40 C
to +85
C 40 C
to +125
C
Unit
Min
Max
Min
Max
-
-
-
-
-
-
15
12
15
15
5
24
25
-
28
25
12
-
-
-
-
-
-
-
31
-
35
31
15
-
-
-
-
-
-
-
38
-
42
38
18
-
ns
ns
ns
ns
ns
pF
[1]
[2]
[3]
[4]
[5]
t
pd
is the same as t
PLH
and t
PHL
.
t
en
is the same as t
PZH
and t
PZL
.
t
dis
is the same as t
PLZ
and t
PHZ
.
t
t
is the same as t
THL
and t
TLH
.
C
PD
is used to determine the dynamic power dissipation (P
D
in
W).
P
D
= C
PD
V
CC2
f
i
N +
(C
L
V
CC2
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
CC2
f
o
) = sum of outputs.
11. Waveforms
V
I
nA input
GND
t
PHL
V
OH
nY output
V
OL
t
THL
V
M
V
M
10 %
V
M
V
M
t
PLH
90 %
t
TLH
aaa-003130
Measurement points are given in
V
OL
and V
OH
are typical voltage output levels that occur with the output load.
Fig 5.
74HC_HCT125
Propagation delay input (nA) to output (nY)
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© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 4 — 10 January 2013
7 of 17
PHILIPS [ NXP SEMICONDUCTORS ]
