PI3B16244VE(2004) Просмотр технического описания (PDF) - Pericom Semiconductor
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PI3B16244VE Datasheet PDF : 3 Pages
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PI3B16244
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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)
Conditions(1)
VCC = Max.
VCC = Max.
VCC = Max.,
A and B Pins Open
Control Input Toggling
50% Duty Cycle
VIN = GND or VCC
VIN = 3.0V(3)
Min.
—
—
Type(2)
—
—
Max.
10
750
Units
µA
—
—
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 = 3.3V, +25°C ambient.
3. Per TTL driven input (control inputs 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
Conditions(1)
Com.
Parameters
Description
Min.
Max.
Units
tPLH
Propagation Delay(2,3)
CL = 50pF
0.25
tPHL
Ax to Bx, Bx to Ax
RL = 500Ω
tPZH
Bus Enable Time
tPZL
BEx to Ax or Bx
CL = 50pF
1
4.5
RL = 500Ω
ns
R = 500Ω
tPHZ
Bus Disable Time
tPLZ
BEx to Ax or Bx
1
5.0
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.
Applications Information
Logic Inputs
Logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a 5.0V supply, the control or
select pins may be driven low to 0V and high to 5.5V. Driving the control or select pins Rail-toRail® minimizes power consumption.
Power-Supply Sequencing and Hot Plug Information
Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC and GND before applying signals to the
input/output or control pins.
3
PS8170D
10/01/04
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