PI5C3251L 查看數據表（PDF） - Pericom Semiconductor
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PI5C3251L Datasheet PDF : 6 Pages
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PI5C3251
8:1 Mux/DeMux BusSwitch
Power Supply Characteristics
Parameters
Description
ICC
Quiescent Power Supply Current
ΔICC
Supply Current per
Input @ TTL HIGH
ICCD
Supply Current per
Input per MHz(4)
Test Conditions(1)
VCC = Max.
VIN = GND or
VCC
VCC = Max.
VIN = 3.4V(3)
VCC = Max.,
I and Y Pins Open
E = GND
Control Input Toggling
50% Duty Cycle
Min. Typ(2) Max. Units
0.1 3.0 µA
2.5 mA
0.25
mA/
MHz
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V, control inputs only); I and Y pins do not contribute to Icc.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency. The I
and Y inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
Switching Characteristics over Operating Range
Parameters
Description
tIY
Propagation Delay(2,3)
In to Y
Conditions(1)
Com.
Unit
Min.
Max.
0.25
tSY
Bus Select Time
Sn to Y
tPZH Bus Enable Time
tPZL
E to Y
CL = 50 pF
RL = 500Ω
0.5
6.6
ns
0.5
6.0
tPHZ Bus Disable Time
tPLZ
E to Y
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 0.25 ns for 50 pF 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.
3
PS7016B 09/14/04
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