Datasheet

74LVT_LVTH244B_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet Rev. 03 — 3 March 2006 9 of 15
Philips Semiconductors
74LVT244B; 74LVTH244B
3.3 V octal buffer/line driver; 3-state
Test data is given in Table 10.
Definitions test circuit:
R
L
= Load resistor.
C
L
= Load capacitance including jig and probe capacitance.
R
T
= Termination resistance should be equal to output impedance Z
o
of the pulse generator.
V
EXT
= Test voltage for switching times.
Fig 6. Load circuitry for switching times
Table 10. Test data
Input Load V
EXT
V
I
f
i
t
W
t
r
, t
f
C
L
R
L
t
PHZ
, t
PZH
t
PLZ
, t
PZL
t
PLH
, t
PHL
2.7 V ≤ 10 MHz 500 ns ≤ 2.5 ns 50 pF 500 Ω GND 6 V open
V
EXT
V
CC
V
I
V
O
001aae235
DUT
C
L
R
T
R
L
R
L
PULSE
GENERATOR
V
M
V
M
t
W
t
W
10 %
90 %
0 V
V
I
V
I
negative
pulse
positive
pulse
0 V
V
M
V
M
90 %
10 %
t
f
t
r
t
r
t
f