9397 750 13117 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet Rev. 03 — 12 May 2004 10 of 17
Philips Semiconductors
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
11. Dynamic characteristics
[1] All typical values are measured at T
amb
=25°C
.
[2] Typical values are measured at V
CC
= 2.5 V.
[3] Typical values are measured at V
CC
= 3.3 V.
[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+∑ (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 = total load switching outputs;
∑ (C
L
× V
CC
2
× f
o
) = sum of outputs.
[5] The condition is V
I
= GND to V
CC
.
Table 8: Dynamic characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V); test circuit Figure 8.
Symbol Parameter Conditions Min Typ Max Unit
T
amb
= −40 °C to +85 °C
[1]
t
PHL
, t
PLH
propagation delay nAn to nBn;
nBn to nAn
see Figure 6
V
CC
= 2.3 V to 2.7 V
[2]
1.0 2.0 3.7 ns
V
CC
= 3.0 V to 3.6 V
[3]
1.0 1.9 3.0 ns
V
CC
= 2.7 V 1.0 2.1 3.6 ns
t
PZH
, t
PZL
3-state output enable time nOE to
nAn; n
OE to nBn
see
Figure 7
V
CC
= 2.3 V to 2.7 V
[2]
1.0 2.7 5.7 ns
V
CC
= 3.0 V to 3.6 V
[3]
1.0 2.3 4.4 ns
V
CC
= 2.7 V 1.0 3.0 5.4 ns
t
PHZ
, t
PLZ
3-state output disable time nOE to
nAn; n
OE to nBn
see
Figure 7
V
CC
= 2.3 V to 2.7 V
[2]
1.0 2.2 5.2 ns
V
CC
= 3.0 V to 3.6 V
[3]
1.0 2.8 4.1 ns
V
CC
= 2.7 V 1.0 3.1 4.6 ns
C
PD
power dissipation capacitance per
buffer
outputs enabled
[4] [5]
-29-pF
outputs disabled
[4] [5]
-5-pF
