Datasheet

TS3USB221E
www.ti.com SCDS263B –SEPTEMBER 2009–REVISED JULY 2012
DYNAMIC ELECTRICAL CHARACTERISTICS
over operating range, T
A
= –40°C to 85°C, V
CC
= 2.5 V ±10%, GND = 0 V
PARAMETER TEST CONDITIONS TYP
(1)
UNIT
X
TALK
Crosstalk R
L
= 50 , f = 250 MHz -39 dB
O
IRR
OFF isolation R
L
= 50 , f = 250 MHz -40 dB
BW Bandwidth (3 dB) R
L
= 50 1 GHz
(1) For Max or Min conditions, use the appropriate value specified under Electrical Characteristics for the applicable device type.
SWITCHING CHARACTERISTICS
over operating range, T
A
= –40°C to 85°C, V
CC
= 3.3 V ±10%, GND = 0 V
PARAMETER MIN TYP
(1)
MAX UNIT
t
pd
Propagation delay
(2) (3)
0.25 ns
S to D, nD 30
t
ON
Line enable time ns
OE to D, nD 17
S to D, nD 12
t
OFF
Line disable time ns
OE to D, nD 10
t
SK(O)
Output skew between center port to any other port
(2)
0.1 0.2 ns
t
SK(P)
Skew between opposite transitions of the same output (t
PHL
– t
PLH
)
(2)
0.1 0.2 ns
(1) For Max or Min conditions, use the appropriate value specified under Electrical Characteristics for the applicable device type.
(2) Specified by design
(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 0.25 ns for 10-pF 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 interactions with the load on the driven side.
SWITCHING CHARACTERISTICS
over operating range, T
A
= –40°C to 85°C, V
CC
= 2.5 V ±10%, GND = 0 V
PARAMETER MIN TYP
(1)
MAX UNIT
t
pd
Propagation delay
(2) (3)
0.25 ns
S to D, nD 50
t
ON
Line enable time ns
OE to D, nD 32
S to D, nD 23
t
OFF
Line disable time ns
OE to D, nD 12
t
SK(O)
Output skew between center port to any other port
(2)
0.1 0.2 ns
t
SK(P)
Skew between opposite transitions of the same output (t
PHL
– t
PLH
)
(2)
0.1 0.2 ns
(1) For Max or Min conditions, use the appropriate value specified under Electrical Characteristics for the applicable device type.
(2) Specified by design
(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 0.25 ns for 10-pF 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 interactions with the load on the driven side.
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