4
INDUSTRIAL TEMPERATURE RANGE
IDTQS32X2384
HIGH-SPEED CMOS 20-BIT BUS SWITCH
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TTL driven input (V
IN = 3.4V, control inputs only). A and B pins do not contribute to ΔIcc.
3. This current applies to the control inputs only and represents 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 guaranteed but not production tested.
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions
(1)
Max. Unit
ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 3 mA
ΔICC Power Supply Current
per Input HIGH
(2)
VCC = Max., VIN = 3.4V, f = 0 2.5 mA
ICCD Dynamic Power Supply Current per MHz
(3)
VCC = Max., A and B Pins Open 0.25 mA/MHz
Control Input Toggling @ 50% Duty Cycle
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C
Symbol Parameter Min.
(1)
Typ. Max. Unit
tPLH Data Propagation Delay
(2,4)
⎯⎯1.25
(3)
ns
tPHL Ax to Bx, Bx to Ax
tPZL Switch Turn-On Delay 1.5 ⎯ 7.5 ns
tPZH BEx to Ax, Bx
t
PLZ Switch Turn-Off Delay
(2)
1.5 ⎯ 5.5 ns
tPHZ BEx to Ax, Bx
NOTES:
1. Minimums are guaranteed but not production tested.
2. This parameter is guaranteed but not production tested.
3. The time constant for the switch alone is of the order of 1.25ns at CL = 50pF.
4. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. Since this time constant is much smaller
than the rise and fall times of typical driving signals, it adds very little propagation delay to the system. Propagation 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.
