74ALVC125_2 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 02 — 10 January 2008 6 of 13
NXP Semiconductors
74ALVC125
Quad buffer/line driver; 3-state
[1] Typical values are measured at T
amb
=25°C
[2] t
pd
is the same as t
PHL
and t
PLH
.
t
en
is the same as t
PZH
and t
PZL
.
t
dis
is the same as t
PHZ
and t
PLZ
.
[3] C
PD
is used to determine the dynamic power dissipation (P
D
in µW).
P
D
=C
PD
× V
CC
2
× f
i
× N+Σ(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 Volts
N = number of inputs switching
Σ(C
L
× V
CC
2
× f
o
) = sum of the outputs
11. Waveforms
C
PD
power dissipation
capacitance
per buffer; V
I
= GND to V
CC
; V
CC
= 3.3 V
[3]
outputs HIGH or LOW state - 27 - pF
outputs 3-state - 5 - pF
Table 7. Dynamic characteristics
…continued
Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 8.
Symbol Parameter Conditions −40 °C to +85 °C Unit
Min Typ
[1]
Max
Measurement points are given in Table 8.
V
OL
and V
OH
are the typical output voltage levels that occur with the output load.
Fig 6. Input nA to output nY propagation delay times
mna230
t
PHL
t
PLH
V
M
V
M
nA input
nY output
GND
V
I
V
OH
V
OL
Table 8. Measurement points
Supply voltage Input Output
V
CC
V
M
V
M
V
X
V
Y
1.65 V to 1.95 V 0.5V
CC
0.5V
CC
V
OL
+ 0.15 V V
OH
− 0.15 V
2.3 V to 2.7 V 0.5V
CC
0.5V
CC
V
OL
+ 0.15 V V
OH
− 0.15 V
2.7 V 1.5 V 1.5 V V
OL
+ 0.3 V V
OH
− 0.3 V
3.0 V to 3.6 V 1.5 V 1.5 V V
OL
+ 0.3 V V
OH
− 0.3 V
