4
INDUSTRIAL TEMPERATURE RANGE
IDTQS32X384
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 Control 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 at 50% Duty Cycle
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5.0V ± 5%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol Parameter Min.
(1)
Typ. Max. Unit
tPLH Data Propagation Delay
(2,4)
— — 0.25
(3)
ns
tPHL Ax to Bx, Bx to Ax
tPZL Switch Turn-on Delay 1.5 — 6.5 ns
tPZH BEn to Ax, Bx
tPLZ Switch Turn-off Delay
(2)
1.5 — 5.5 ns
tPHZ BEn 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 0.25ns for 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.
