Nexperia
74AHCV244A
Octal buffer/line driver; 3-state
74AHCV244A All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 2 — 21 March 2018
7 / 15
10 Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 9.
25 °C -40 °C to
+85 °C
-40 °C to
+125 °C
Symbol Parameter Conditions
Min Typ
[1]
Max Min Max Min Max
Unit
nAn to nYn; see Figure 7
[2]
V
CC
= 2.3 V to 2.7 V; C
L
= 15 pF - 5.1 12.5 1 15 1 15 ns
V
CC
= 2.3 V to 2.7 V; C
L
= 50 pF - 7 15.3 1 18 1 18 ns
V
CC
= 3.0 V to 3.6 V; C
L
= 15 pF - 3.9 8.4 1 10 1 10 ns
V
CC
= 3.0 V to 3.6 V; C
L
= 50 pF - 5.4 11.9 1 13.5 1 13.5 ns
V
CC
= 4.5 V to 5.5 V; C
L
= 15 pF - 3 5.5 1 6.5 1 6.5 ns
t
pd
propagation
delay
V
CC
= 4.5 V to 5.5 V; C
L
= 50 pF - 4.2 7.5 1 8.5 1 8.5 ns
nOE to nYn; see Figure 8
[2]
V
CC
= 2.3 V to 2.7 V; C
L
= 15 pF - 6.1 14.6 1 17 1 17 ns
V
CC
= 2.3 V to 2.7 V; C
L
= 50 pF - 8.2 17.8 1 21 1 21 ns
V
CC
= 3.0 V to 3.6 V; C
L
= 15 pF - 4.6 10.6 1 12.5 1 12.5 ns
V
CC
= 3.0 V to 3.6 V; C
L
= 50 pF - 6.3 14.1 1 16 1 16 ns
V
CC
= 4.5 V to 5.5 V; C
L
= 15 pF - 3.0 7.3 1 8.5 1 8.5 ns
t
en
enable time
V
CC
= 4.5 V to 5.5 V; C
L
= 50 pF - 4.4 9.3 1 10.5 1 10.5 ns
nOE to nYn; see Figure 8
[2]
V
CC
= 2.3 V to 2.7 V; C
L
= 15 pF - 6.6 15 1 17 1 17 ns
V
CC
= 2.3 V to 2.7 V; C
L
= 50 pF - 11.2 19.2 1 21 1 21 ns
V
CC
= 3.0 V to 3.6 V; C
L
= 15 pF - 5.3 13 1 15 1 15 ns
V
CC
= 3.0 V to 3.6 V; C
L
= 50 pF - 8.8 14 1 16 1 16 ns
V
CC
= 4.5 V to 5.5 V; C
L
= 15 pF - 4.2 12 1 14 1 14 ns
t
dis
disable time
V
CC
= 4.5 V to 5.5 V; C
L
= 50 pF - 6.4 9.2 1 10.5 1 10.5 ns
V
CC
= 2.3 V to 2.7 V; C
L
= 50 pF - - 2 - 2 - 2 ns
V
CC
= 3.0 V to 3.6 V; C
L
= 50 pF - - 1.5 - 1.5 - 1.5 ns
t
sk(o)
skew
V
CC
= 4.5 V to 5.5 V; C
L
= 50 pF - - 1 - 1 - 1 ns
C
I
input
capacitance
V
I
= V
CC
or GND; V
CC
= 3.3 V - 2 6 - 6 - 6 pF
C
O
output
capacitance
V
O
= V
CC
or GND; V
CC
= 3.3 V - 5 - - - - - pF
C
PD
power
dissipation
capacitance
per buffer; C
L
= 0 pF; f = 10 MHz;
V
CC
= 5 V; V
I
= GND to V
CC
[3]
- 15 - - - - - pF
[1] Typical values are measured at T
amb
= 25 °C and V
CC
= 2.5 V, 3.3 V, and 5 V respectively, unless otherwise specified.
[2] t
pd
is the same as t
PLH
and t
PHL
; t
en
is the same as t
PZL
and t
PZH
; t
dis
is the same as t
PLZ
and t
PHZ
.
[3] C
PD
is used to determine the dynamic power dissipation P
D
(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 outputs.
