4
PS8573D
11/11/08
PI90LV387/PI90LVB387
High-Speed Differential Line Drivers
Switching Characteristics (Over Recommended Operating Conditions, unless otherwise noted)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Units
tPHL
Propagation delay time low-to-high level outputs
RL = 50Ω (LVB)
RL = 100Ω (LV)
CL = 10pF
See Figure 4
0.9
1.8
2.6
ns
tPHL
Propagation delay time, high-to-low-level outputs
0.9
1.8
2.6
tr
Differential outpu sign rise time
0.4
0.8
1.3
tf
Differential output signal fall time
0.4
0.8
1.3
tsk(p)
Pulse skew ( | tphl - tphl | )
150
500
ps
tsk(o)
Output skew(2)
80
150
tsk(pp)
Part-to-part skew (3)
1.5
tPZH
Propagation delay time, high impdeance-to high-level output
See Figure 5
4.5
6.7
ns
tPZL
Propagation delay time, high impdeance-to low-level output
3.5
5.1
tPHZ
Propagation delay time, high-level-to-high-impdeance output
3.1
4.6
tPLZ
Propagation delay time, low-level-to-high-impdeance output
3.1
4.6
fMAX
Maximum operating frequency
250
MHz
Notes:
1.
All typical values are at 25°C and with a 3.3V supply
2.
tsk(o) is the magnitude of the time difference between the tPLH or tPHL of all drivers of a single device with all of their inputs connected to-
gether.
3.
tsk(pp) is the magnitude of the difference in propagation delay times between any specied terminals of two devices when both devices operate
with the same supply voltages, at the same temperature, and have identical packages and test circuits
08-0295