SMSC DS – USB97CFDC2-01

Page 23

Rev. 02-27-07

DATASHEET

PARAMETER

SYM

CONDITIONS

(NOTE 1, 2, 3)

MIN

TYP

MAX

UNIT

Cable Impedance and Timing

Cable Impedance (Full

Speed)

ZO

(45

Ω +/- 15%)

38.75

51.75

Ω

Cable Delay (One Way)

TCBL

30

ns

Note 1: All voltages are measured from the local ground potential, unless otherwise specified.

Note 2: All timing use a capacitive load (CL) to ground of 50pF, unless otherwise specified.

Note 3: Full speed timings have a 1.5K

Ω pull-up to 2.8 V on the D+ data line.

Note 4: Measured from 10% to 90% of the data signals.

Note 5: The rising and falling edges should be smoothly transiting (monotonic).

Note 6: Timing differences between the differential data signals.

Note 7: Measured at crossover point of differential data signals.

Note 8: These are relative to the 14.318 MHz crystal.