PI3B3257 Datasheet, PDF (3/5 Pages) Pericom Semiconductor Corporation – 3.3V, Quad 2:1 Mux/Demux Bus Switch

PI3B3257
3.3V, Quad 2:1
Mux/Demux Bus Switch _{1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122}
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^(3,4)
V_CC = Max. V_IN = GND or V_CC
V_CC = Max. V_IN = 3.0V
0.1 3.0
µA
750
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 (control inputs only); I and Y 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 I and Y 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
Parameters
Description
t_IY
Propagation Delay In to Yn^(2,3)
t_SY
Bus Select Time, Sn to Yn
t_PZH
t_PZL
Bus Enable Time, E to Yn
t_PHZ
t_PLZ
Bus Disable Time, E to Yn
Conditions⁽¹⁾
C_L = 50pF
R_L = 500Ω
PI3B3257
Com.
Min.
Max.
0.25
1
4.5
1
4.5
1
4.8
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 switch’s time constant 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.
3
PS8151F 05/07/01