4
INDUSTRIAL TEMPERATURE RANGE
IDTQS34X383
HIGH-SPEED 32-BIT BUS EXCHANGE SWITCH
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions
(1)
Max. Unit
ICCQ Quiescent Power Supply Current VCC = Max., BEx = GND or Vcc, f = 0 6 mA
ΔICC Power Supply Current per Control Input HIGH
(2)
VCC = Max., BEx = 3.4V, f = 0 2.5 mA
I
CCD Dynamic Power Supply Current per MHz
(3)
VCC = Max., A and B pins open 0.25 mA/MHz
Control Inputs Toggling at 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TLL driven input (V
IN = 3.4V, control inputs only). A-D 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.
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
(2,3)
— — 0.25 ns
tPHL AxBx to CxDx, CxDx to AxBx
tPZL Switch Turn-on Delay 1.5 — 6.5 ns
tPZH BEx to Ax, Bx, Cx, Dx
tPLZ Switch Turn-off Delay
(2)
1.5 — 5.5 ns
tPHZ BEx to Ax, Bx, Cx, Dx
tBX Switch Multiplex Delay
(2)
1.5 — 6.5 ns
BX to Ax, Bx, Cx, Dx
QCI Charge Injection
(4,5)
— 1.5 — pC
NOTES:
1. Minimums are guaranteed but not production tested.
2. This parameter is guaranteed but not production tested.
3. The bus switch contributes no propagation 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 CL = 50pF. 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.
4. Measured at switch turn off, A to C, load = 50pF in parallel with 10 meg scope probe, VIN at I = 0V.
5. Measured at switch turn off through bus multiplexer, A to C ≥ A to D, B connected to C, load = 50pF in parallel with 10 meg scope probe, VIN at A = 0V. Charge injection
is reduced because the injection from the turn off of the A to C switch is compensated by the turn on of the B to C switch.
