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
t
PHL
Propagation delay time low-to-high level outputs
R
L
= 50Ω (LVB)
R
L
= 100Ω (LV)
C
L
= 10pF
See Figure 4
0.9 1.8 2.6
ns
t
PHL
Propagation delay time, high-to-low-level outputs 0.9 1.8 2.6
t
r
Differential outpu sign rise time 0.4 0.8 1.3
t
f
Differential output signal fall time 0.4 0.8 1.3
t
sk(p)
Pulse skew ( | tphl - tphl | ) 150 500
pst
sk(o)
Output skew
(2)
80 150
t
sk(pp)
Part-to-part skew
(3)
1.5
t
PZH
Propagation delay time, high impdeance-to high-level output
See Figure 5
4.5 6.7
ns
t
PZL
Propagation delay time, high impdeance-to low-level output 3.5 5.1
t
PHZ
Propagation delay time, high-level-to-high-impdeance output 3.1 4.6
t
PLZ
Propagation delay time, low-level-to-high-impdeance output 3.1 4.6
f
MAX
Maximum operating frequency 250 MHz
Notes:
1. All typical values are at 25°C and with a 3.3V supply
2. t
sk(o)
is the magnitude of the time difference between the t
PLH
or t
PHL
of all drivers of a single device with all of their inputs con nect ed to-
gether.
3. t
sk(pp)
is the magnitude of the difference in propagation delay times between any specifi ed terminals of two devices when both devices operate
with the same supply voltages, at the same temperature, and have identical packages and test circuits
