2003 May 14 10
Philips Semiconductors Product specification
2.5 V/3.3 V 16-bit buffer/line driver
(3-state)
74ALVC16244;
74ALVCH16244
AC CHARACTERISTICS
GND = 0 V; t
r
=t
f
≤2.0 ns and C
L
= 30 pF for V
CC
< 2.7 V; t
r
=t
f
≤2.5 ns and C
L
= 50 pF for V
CC
≥ 2.7 V.
Note
1. All typical values are measured at T
amb
=25°C.
Typical values for V
CC
= 2.3 to 2.7 V are measured at V
CC
= 2.5 V.
Typical values for V
CC
= 3.3 to 3.6 V are measured at V
CC
= 3.3 V.
AC WAVEFORMS
SYMBOL PARAMETER
TEST CONDITIONS
MIN. TYP. MAX. UNIT
WAVEFORMS V
CC
(V)
T
amb
= −40 to +85 °C; note 1
t
PHL
/t
PLH
propagation
delay nAn to nYn
see Figs 5 and 7 1.2 − 5.8 − ns
1.8 1.5 2.8 5.1 ns
2.3 to 2.7 1.0 1.9 3.7 ns
2.7 1.0 2.1 3.6 ns
3.0 to 3.6 1.0 1.9 3.0 ns
t
PZH
/t
PZL
3-state output
enable time
nOE to nYn
see Figs 6 and 7 1.2 − 8.4 − ns
1.8 1.5 3.8 7.1 ns
2.3 to 2.7 1.0 2.5 4.9 ns
2.7 1.0 2.9 4.9 ns
3.0 to 3.6 1.0 2.3 4.0 ns
t
PHZ
/t
PLZ
3-state output
disable time
nOE to nYn
see Figs 6 and 7 1.2 − 5.9 − ns
1.8 1.5 3.1 5.4 ns
2.3 to 2.7 1.0 2.1 4.1 ns
2.7 1.0 3.0 4.5 ns
3.0 to 3.6 1.0 2.7 4.1 ns
handbook, halfpage
MNB013
nAn input
nYn output
t
PHL
t
PLH
GND
V
I
V
M
V
M
V
OH
V
OL
Fig.5 Input (nAn) to output (nYn) propagation delays.
V
M
= 0.5V
CC
at V
CC
< 2.7 V and V
M
= 1.5 V at V
CC
≥ 2.7 V.
V
OL
and V
OH
are the typical output voltage drop that occur with the output load.
