PI5C3253 Datasheet, PDF (3/6 Pages) Pericom Semiconductor Corporation – Dual 4:1 Mux/DeMux Bus Switch

PI5C3253
Dual 4:1 Mux/DeMux Bus Switch
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 = 3.4V⁽³⁾
0.1
3.0
µA
2.5 mA
I_CCD
Supply Current per
Input per MHz⁽⁴⁾
V_CC = Max.,
I and Y Pins Open
BE = 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 V_CC = 5.0V, +25°C ambient.
3. Per TTL driven input (V_IN = 3.4V, 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
Param-
eters
t_IY
t_SY
t_PZH
t_PZL
t_PHZ
t_PLZ
Description
Propagation Delay^(2,3) In to Yn
Bus Select Time, Sn to Yn
Bus Enable Time, En to Yn
Bus Disable Time, En to Yn
Conditions⁽¹⁾
C_L = 50pF
R_L = 500Ω
Com.
Min.
Max.
0.25
0.5
6.6
0.5
6.0
0.5
6.0
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.
3
PS7017C
09/14/04