PI5C3125C Просмотр технического описания (PDF) - Pericom Semiconductor
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PI5C3125C Datasheet PDF : 6 Pages
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PI5C3125C/3126C
4-Bit Bus Switch with
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PI5C3125C Switching Characteristics over Operating Range
PI5C3125C
Com
Parameters
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Description
Propagation Delay(2,3)
A to B, B to A
Bus Enable Time
Bus Disable Time
Conditions
CL = 50pF
RL = 500ohm
Min.
0.5
0.5
Max.
0.25
Units
6.6
ns
6.0
PI5C3126C Switching Characteristics over Operating Range
PI5C3126C
Com
Parameters
Description
Conditions
Min.
Max. Units
tPLH
Propagation Delay(2,3)
tPHL
A to B, B to A
0.25
tPZH
tPZL
Bus Enable Time
CL = 50pF
RL = 500ohm
0.5
6.6
ns
tPHZ
tPLZ
Bus Disable Time
0.5
6.0
Notes:
1. See test circuit and wave forms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. 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.
Applications Information
Logic Inputs
The logic control inputs can be driven up to +5.5V regardless of the
supply voltage. For example, given a +5.0V supply, BE, maybe driven
LOW to 0V and HIGH to 5.5V. Driving BE Rail-to-Rail® minimizes
power consumption.
Power-Supply Sequencing
Proper power-supply sequencing is recommended for all CMOS
devices. Always apply Vcc before applying signals to the input/
output or control pins.
®Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
4
PS8512 03/14/01
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