PI3B32X245 Datasheet, PDF (3/3 Pages) Pericom Semiconductor Corporation – 3.3V, Hot Insertion 16-Bit, 2-Port Bus Switch

PI3B32X245
3.3V, Hot Insertion 16-Bit, 2-Port BusSwitch
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Power Supply Characteristics
Parameters Description
Test Conditions⁽¹⁾
Min. Typ.⁽²⁾ Max. Units
I_CC
∆I_CC
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
V_CC = Max.
V_CC = Max.
V_IN = GND or V_CC
V_IN = 3.0V⁽³⁾
1.0 3.0 µA
750 µA
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V_CC = 3.3V, +25°C ambient.
3. Per TTL driven input (V_IN = 3.4V, control inputs only); A and B pins do not contribute to I_CC.
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.
PI3B32X245 Switching Characteristics over Operating Range
PI3B32X245
Parameters Description
Conditions⁽¹⁾
Com.
Min.
Max.
t_PLH
Propagation Delay^(2,3) C_L= 50pF
t_PHL
Ax to Bx, Bx to Ax
R_L= 500Ω
t_PZH
Bus Enable Time
t_PZL
BEx to Ax or Bx
t_PHZ
Bus Disable Time
t_PLZ
BEx to Ax or Bx
—
0.25
1.0
4.0
1.0
4.5
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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax [phone] • http://www.pericom.com
3
PS8337A
03/31/99