PI3C3125_07 Datasheet, PDF (4/7 Pages) Pericom Semiconductor Corporation – 2.5V/3.3V, High Bandwidth, Hot Insertion,4-Bit, 2-Port Bus Switch with Individual Enables

PI3C3125/PI3C3126
2.5V/3.3V, High Bandwidth, Hot Insertion,4-Bit,
2-Port Bus Switch with Individual Enables
PI3C3125/PI3C3126 Switching Characteristics over 3.3V Operating Range
Parameters Description
Conditions
PI3C3125/PI3C3126
Com.
Units
Min.
Max.
t_PLH
Propogation Delay^(1,2)
C_L =50pF
0.25
t_PHL A to B, B to A
R_L = 500Ω
ns
t_PZH Bus Enable Time
C_L =50pF
1.5
6.5
t_PZL
R_L = 500Ω
t_PHZ Bus Disable Time
R = 500Ω
1.5
5.5
t_PLZ
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load
capacitance. The time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller
than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus
switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load
on the driven side.
PI3C3125/PI3C3126 Switching Characteristics over 2.5V Operating Range
Parameters Description
t_PLH
Propogation Delay^(1,2)
t_PHL A to B, B to A
t_PZH Bus Enable Time
t_PZL
t_PHZ Bus Disable Time
t_PLZ
Conditions
C_L =50pF
R_L = 500Ω
C_L =50pF
R_L = 500Ω
R = 500Ω
PI3C3125/PI3C3126
Com.
Min.
Max.
0.25
1.5
9.8
1.5
8.3
Units
ns
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load capacitance.
The time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the
rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch
when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the
driven side.
07-0240
4
PS8153H
10/25/07