PI5C34X245(2011) Просмотр технического описания (PDF) - Pericom Semiconductor Corporation
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PI5C34X245 Datasheet PDF : 4 Pages
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PI5C34X245
32-Bit, 2-Port Bus Switch
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1) Description
Test Conditions
CIN
Input Capacitance
COFF
A/B Capacitance, Switch Off
VIN = 0V
CON
A/B Capacitance, Switch On
Notes:
1. This parameter is determined by device characterization but is not production tested.
Typ Units
6
pF
6
pF
12
pF
Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min Typ (2) Max Units
ICC
ΔICC
Quiescent Power Supply
Current
VCC = Max.
Supply Current @ TTL
HIGH
VCC = Max.
VIN = GND or
VCC
VIN = 3.4V(3)
0.1
3.0
μA
2.5
mA
VCC = Max.
ICCD
Supply Current per
Input per MHz(4)
A & B Pins Open,
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
3. 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
Com.
Parameters Description
Test Conditions
Min Max Units
tPLH
Propagation Delay(1,2)
tPHL
Ax to Bx
0.25
tPZH
Bus Enable Time
CL = 50 pF
tPZL
BE to Ax or Bx
RL = 500Ω
1.5
5.6
ns
tPHZ
Bus Disable Time
tPLZ
BE to Ax or Bx
1.5
5.2
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load ca-
pacitance. 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.
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11-0009
3
www.pericom.com
05/26/11
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