4
1999 Integrated Device Technology, Inc
IDT
QS3862 AND QS32862
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POWER SUPPLY CHARACTERISTICS OVER OPERATING RANGE
TA = –40°C to 85°C, VCC = 5.0V ± 10%
Symbol Parameter Test Conditions(1) Typ(2) Max Unit
ICCQ Quiescent Power VCC = Max., VIN = GND or VCC, f = 0 0.2 3.0 µA
Supply Current
∆ICC Power Supply Current VCC = Max., VIN = 3.4V(3), f = 0 — 2.5 mA
per Input HIGH per Control Input
QCCD Dynamic Power Supply VCC = Max., A and B Pins Open, — 0.25 mA/
Current per MHz(4) BE, BE Inputs MHz
Toggling @ 50% Duty Cycle
Notes:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC specifications.
2. Typical Values are at VCC = 5.0V, +25°C Ambient.
3. Per TTL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ∆ICC.
4. 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.
QS3862 QS32862
Symbol Description(1) Min Typ Max Min Typ Max Unit
tPLH Data Propagation Delay(2,4) — — 0.25(3) — — 1.25(3) ns
tPHL A to B or B to A
tPZL Switch Turn-on Delay 1.5 — 6.5 1.5 — 7.5 ns
tPZH BE or BE to A or B
tPLZ Switch Turn-off Delay(2) 1.5 — 5.5 1.5 — 5.5 ns
tPHZ BE or BE to A or B
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = –40°C to 85°C, VCC = 5.0V ± 10%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Notes:
1. See Test Circuit and Waveforms. Minimums 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 QS3862 and 1.25ns for QS32862 at C L = 50pF.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/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.
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