PI74LPT244
3.3V 8-Bit Buffer /Line Driver
Switching Characteristics over Operating Range
(1)
LPT244
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK(
O
)
Description
Propagation Delay
D
XX
to
O
XX
Output Enable Time
OEx to Oxx
Output Disable Time
(3)
OEx to Oxx
Output Skew
(4)
C
L
= 50pF
R
L
= 500Ω
Conditions
Com.
Min.
(2)
1.5
1.5
1.5
Max
6.5
8.0
7.0
0.5
LPT244A
Com.
Min.
(2)
1.5
1.5
1.5
Max.
4.8
6.2
5.6
0.5
LPT244C
Com.
Min.
(2)
1.5
1.5
1.5
Max.
4.1
5.8
5.2
0.5
ns
Units
Notes:
1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V ±0.3V, normal range. For Vcc = 2.7V, extended range, all Propagation Delays
and Enable/Disable times should be degraded by 20%.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not production tested.
4. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
Packaging Mechanical: 20-pin QSOP (Q)
20
.008
0.20
MIN.
.150
.157
3.81
3.99
Guage Plane
.008
.013
0.20
0.33
1
.337
8.56
.344
8.74
.010
0.254
Detail A
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.058
REF
1.47
.053
1.35
.069
1.75
.015 x 45˚
0.38
Detail A
SEATING
PLANE
.007
.010
.016
.050
0.178
0.254
0.41
1.27
.025
BSC
0.635
.008
0.203
.012
0.305
.004
0.101
.010
0.254
.228
.244
5.79
6.19
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
06-0181
5
PS2058F
06/05/06
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
