PI5C3257(1996) 查看數據表（PDF） - Pericom Semiconductor
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PI5C3257 Datasheet PDF : 3 Pages
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PI5C3257
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Power Supply Characteristics
Parameters Description
ICC
Quiescent Power
Supply Current
∆ICC
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
BE = 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
tIY
tSY
tPZH
tPZL
tPHZ
tPLZ
Description
Propagation Delay(2,3)
In to Yn
Bus Select Time
Sn to Yn
Bus Disable Time
E to Yn
Bus Disable Time
E to Yn
Conditions(1)
CL = 50 pF
RL = 500Ω
PI5C3257
Com.
Min
Max
Unit
0.25
ns
0.5
5.2
ns
0.5
4.8
ns
0.5
5.0
ns
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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
160
PS7018A 03/13/96
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