SC2200 datasheet(409/433 Pages) NSC

409 / 433 page

Revision 3.0

409

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Electrical Specifications (Continued)

tUSB_DJU22

Source differential driver jitter4 for

paired transactions

–150

150

8-38

Function (downstream)

tUSB_SE2

Source EOP width4, 5

1.25

1.5

µs8-39

tUSB_DE2

Differential to EOP 5 transition skew

–40

100

8-39

tUSB_RJD21

Receiver Data Jitter Tolerance4 for

consecutive transactions

–152

152

8-40

Host (upstream)

tUSB_RJD22

Receiver Data Jitter Tolerance4 for

paired transactions

–200

200

8-40

Host (upstream)

tUSB_RJU21

Receiver Data Jitter Tolerance4 for

consecutive transactions

–75

8-40

Function (downstream)

tUSB_RJU22

Receiver Data Jitter Tolerance4 for

paired transactions

–45

8-40

Function (downstream)

Low Speed Receiver EOP Width5

tUSB_RE21

Must reject as EOP

330

8-38

tUSB_RE22

Must accept as EOP

675

8-38

Unless otherwise specified, all timings use a 50 pF capacitive load (CL) to ground.

Full-speed timing has a 1.5 K

Ω pull-up to 2.8 V on the DPOS_Port1,2,3 lines.

Timing difference between the differential data signals (DPOS_PORT1,2,3 and DNEG_PORT1,2,3).

Measured at the crossover point of differential data signals (DPOS_PORT1,2,3 and DNEG_PORT1,2,3).

EOP is the End of Packet where DPOS_PORTt = DNEG_PORT = SE0. SE0 occurs when output level voltage

≤ V

(Min).

CL = 350 pF.

Table 8-28. USB Timing Parameters (Continued)

Symbol

Parameter

Min

Max

Unit

Figure

Comments

SC2200 Datasheet(PDF) 409 Page - National Semiconductor (TI)

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