PI5C34X245Z 데이터 시트보기 (PDF) - Pericom Semiconductor
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PI5C34X245Z Datasheet PDF : 4 Pages
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PI5C34X245
32-Bit, 2-Port BusSwitch 1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122
Power Supply Characteristics
Parameters
Description
ICC
Quiescent Power Supply Current
∆ICC
ICCD
Supply Current per Input @ TTL HIGH
Supply Current per Input per MHz(4)
Test Conditions(1)
VCC = Max.
VCC = Max.
VIN = GND or VCC
VIN = 3.4V(3)
VCC = Max.,
A & B Pins Open
BEn = 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); 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.
PI5C34X245 Switching Characteristics over Operating Range
Parameter
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Description
Propagation Delay(2,3)
AX to Bx, Bx to Ax
Bus Enable Time
BEx to Ax or Bx
Bus Disable Time
BEx to Ax or Bx
Conditions(1)
CL = 50pF
RL = 500 ohms
PI5C34X245
Com.
Min.
Max.
0.25
1.5
5.6
1.5
5.2
Units
ns
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.
PS7058C 08/02/01
3
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