PI5C32X2245 Datasheet, PDF (3/3 Pages) Pericom Semiconductor Corporation – 16-Bit, 2-Port BusSwitch with 25 ohm Series Resistor

PI5C32X2245
16-BIT, 2-PORT BusSwitch
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Power Supply Characteristics
Parameters Description
Test Conditions⁽¹⁾
Min. Typ⁽²⁾ Max. Units
ICC
Quiescent Power
Supply Current
∆ICC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VCC = Max.
VIN = GND or VCC
VIN = 3.4V⁽³⁾
0.1 3.0 µA
2.5 mA
ICCD
Supply Current per
Input per MHz⁽⁴⁾
VCC = Max.,
A and B Pins Open
BEn = GND
Control Input Toggling
50% Duty Cycle
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); 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.
PI5C32X2245 Switching Characteristics over Operating Range
Parameters Description
tPLH
Propagation Delay^(2,3)
tPHL
Ax to Bx, Bx to Ax
tPZH
Bus Enable Time
tPZL
BEX to Ax or Bx
tPHZ
Bus Disable Time
tPLZ
BEx to Ax or Bx
Conditions⁽¹⁾
CL = 50 pF
RL = 500Ω
PI5C32X2245
Com.
Min.
Max. Unit
—
1.25
1.5
7.5
ns
1.5
5.5
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 [phone] • http://www.pericom.com
166
PS8195 05/05/98