9397 750 13251 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet Rev. 02 — 29 June 2004 10 of 19
Philips Semiconductors
74LVC2952A
Octal registered transceiver
[1] All typical values are measured at T
amb
=25°C.
[2] These typical values are measured at V
CC
= 3.3 V.
[3] Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
[4] 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 V;
N = total load switching outputs;
Σ(C
L
× V
CC
2
× f
o
) = sum of the outputs.
[5] The condition is V
I
= GND to V
CC
.
t
PHZ
, t
PLZ
3-state output disable time
OEBA, OEAB to An, Bn
see
Figure 7
V
CC
= 1.2 V - - - ns
V
CC
= 2.7 V 1.5 - 9.5 ns
V
CC
= 3.0 V to 3.6 V 1.5 - 8.5 ns
t
W
clock pulse width HIGH or LOW CPAB or CPBA see Figure 5
V
CC
= 1.2 V - - - ns
V
CC
= 2.7 V 3.0 - - ns
V
CC
= 3.0 V to 3.6 V 3.0 - - ns
t
su
set-up time HIGH or LOW
An, Bn to CPAB, CPBA
see Figure 6
V
CC
= 1.2 V - - - ns
V
CC
= 2.7 V 1.7 - - ns
V
CC
= 3.0 V to 3.6 V 1.3 - - ns
set-up time HIGH or LOW
CEAB, CEBA to CPAB, CPBA
see
Figure 6
V
CC
= 1.2 V - - - ns
V
CC
= 2.7 V 1.3 - - ns
V
CC
= 3.0 V to 3.6 V 1.1 - - ns
t
h
hold time An, Bn to CPAB, CPBA see Figure 6
V
CC
= 1.2 V - - - ns
V
CC
= 2.7 V 1.5 - - ns
V
CC
= 3.0 V to 3.6 V 1.5 - - ns
hold time
CEAB, CEBA to CPAB, CPBA see Figure 6
V
CC
= 1.2 V - - - ns
V
CC
= 2.7 V 1.4 - - ns
V
CC
= 3.0 V to 3.6 V 1.1 - - ns
f
max
maximum clock pulse frequency see Figure 5
V
CC
= 1.2 V - - - MHz
V
CC
= 2.7 V 150 - - MHz
V
CC
= 3.0 V to 3.6 V 150 - - MHz
t
sk(0)
skew
[3]
- - 1.5 ns
Table 9: Dynamic characteristics
…continued
GND = 0 V; see Figure 8 for test circuit.
Symbol Parameter Conditions Min Typ Max Unit
