Datasheet
74LVC4245A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 10 — 18 December 2012 8 of 18
NXP Semiconductors
74LVC4245A
Octal dual supply translating transceiver; 3-state
[1] Typical values are measured at T
amb
=25C, V
CC(A)
= 5.0 V, and V
CC(B)
= 2.7 V and 3.3 V respectively.
[2] Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
[3] 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 Volts
N = number of inputs switching
(C
L
V
CC
2
f
o
) = sum of the outputs
11. AC waveforms
t
sk(o)
output skew
time
[2]
- - 1.0 - 1.5 ns
C
PD
power
dissipation
capacitance
5 V bus: Bn to An;
V
I
=GNDtoV
CC(A
);
V
CC(A
)=5.0V
[3]
outputs enabled - - 17 - - - pF
outputs disabled - - 5 - - - pF
3 V bus: An to Bn;
V
I
=GNDtoV
CC(B
);
V
CC(B
)=3.3V
[3]
outputs enabled - - 17 - - - pF
outputs disabled - - 5 - - - pF
Table 7. Dynamic characteristics
…continued
Voltages are referenced to GND (ground = 0 V). V
CC(A)
= 4.5 V to 5.5 V; t
r
= t
f
2.5 ns. For test circuit see Figure 8.
Symbol Parameter Conditions V
CC(B
) 40 C to +85 C 40 C to +125 C Unit
Min Typ
[1]
Max Min Max
Fig 5. Supply operation area
1.5 2.7 5.7
Complies with TTL levels
3.9
0.9
mna454
3.92.1 4.5 5.13.3
1.5
2.1
2.7
3.3
3.6
1.2
1.8
2.4
3.0
V
CC(A)
(V)
V
CC(B)
(V)
V
CC(A)
³ V
CC(B)
Full operation