PI3B34X245B(2002) Просмотр технического описания (PDF) - Pericom Semiconductor
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PI3B34X245B Datasheet PDF : 4 Pages
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PI3B34X245
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Power Supply Characteristics
Parameters
Description
Test Conditions(1)
Min. Typ.(2) Max. Units
ICC
Quiescent Power
Supply Current
VCC = Max. VIN = GND or VCC
1.0 10
µA
∆ΙCC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.0V(3)
750
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at VCC = 3.3V, +25°C ambient.
3. Per TTL driven input (control input only); A and B 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 A and B 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
PI3B34X245
Parameters
Description
Conditions(1)
Com.
Units
Min. Max.
tPLH
tPHL
Propagation Delay (2,3)
Ax to Bx, Bx to Ax
CL = 50pF
RL = 500Ω
0.25
tPZH
Bus Enable Time
tPZL
BE to Ax or Bx
tPHZ
Bus Disable Time
tPLZ
BE to Ax or Bx
CL = 50pF
1.0 4.0
ns
RL = 500Ω
R = 500Ω
1.0 4.5
Notes:
1. See test circuit and waveforms.
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.
3
PS8335B
02/26/02
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