74AHC_AHCT125_4 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 04 — 11 January 2008 6 of 15
NXP Semiconductors
74AHC125; 74AHCT125
Quad buffer/line driver; 3-state
10. Dynamic characteristics
∆I
CC
additional
supply current
per input pin;
V
I
=V
CC
− 2.1 V; I
O
= 0 A;
other pins at V
CC
or GND;
V
CC
= 4.5 V to 5.5 V
- - 1.35 - 1.5 - 1.5 mA
C
I
input
capacitance
- 3.0 10 - 10 - 10 pF
C
O
output
capacitance
- 4.0 - - - - - pF
Table 6. Static characteristics
…continued
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 °C −40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ Max Min Max Min Max
Table 7. Dynamic characteristics
GND = 0 V; For test circuit see Figure 8.
Symbol Parameter Conditions 25 °C −40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ
[1]
Max Min Max Min Max
For type 74AHC125
t
pd
propagation
delay
nA to nY; see Figure 6
[2]
V
CC
= 3.0 V to 3.6 V
C
L
= 15 pF - 4.4 8.0 1.0 9.5 1.0 11.5 ns
C
L
= 50 pF - 6.2 11.5 1.0 13.0 1.0 14.5 ns
V
CC
= 4.5 V to 5.5 V
C
L
= 15 pF - 3.0 5.5 1.0 6.5 1.0 7.0 ns
C
L
= 50 pF - 4.3 7.5 1.0 8.5 1.0 9.5 ns
t
en
enable time nOE to nY; see Figure 7
[2]
V
CC
= 3.0 V to 3.6 V
C
L
= 15 pF - 4.7 8.0 1.0 9.5 1.0 11.5 ns
C
L
= 50 pF - 6.8 11.5 1.0 13.0 1.0 14.5 ns
V
CC
= 4.5 V to 5.5 V
C
L
= 15 pF - 3.3 5.1 1.0 6.0 1.0 6.5 ns
C
L
= 50 pF - 4.7 7.1 1.0 8.0 1.0 9.0 ns
t
dis
disable time nOE to nY; see Figure 7
[2]
V
CC
= 3.0 V to 3.6 V
C
L
= 15 pF - 6.7 9.7 1.0 11.5 1.0 12.5 ns
C
L
= 50 pF - 9.6 13.2 1.0 15.0 1.0 16.5 ns
V
CC
= 4.5 V to 5.5 V
C
L
= 15 pF - 4.8 6.8 1.0 8.0 1.0 8.5 ns
C
L
= 50 pF - 6.8 8.8 1.0 10.0 1.0 11.0 ns
C
PD
power
dissipation
capacitance
C
L
= 50 pF; f
i
= 1 MHz;
V
I
= GND to V
CC
[3]
-10- - - - -pF
