Electrical Specifications
Differential Interface Electrical Characteristics
Copyright © 2008 Marvell Doc. No. MV-S104859-U0 Rev. E
December 2, 2008, Preliminary Document Classification: Proprietary Information Page 125
8.7.4 USB Electrical Characteristics

8.7.4.1 USB Driver and Receiver Characteristics

Table 69: USB Low Speed Driver and Receiver Characteristics

Min Max
Baud Rate BR Mbps -
Baud rate tolerance Bppm -15000.0 15000.0 ppm -
Ouput single ended high VOH 2.8 3.6 V 1
Ouput single ended low VOL 0.0 0.3 V 2
Output signal crossover v oltage VCRS 1.3 2.0 V 3
Data fall time TLR 75.0 300.0 ns 3, 4
Data rise time TLF 75.0 300.0 ns 3, 4
Rise and fall time matching TLRFM 80.0 125.0 % -
Source jitter total: to next transition TUDJ1 -95.0 95.0 ns 5
Source jitter total: for paired transitions TUDJ2 -150.0 150.0 ns 5
Input single ended high VIH 2.0 - V -
Input single ended low VIL - 0.8 V -
Differ ential input s ensitivity VDI 0.2 - V -
Note s:
General Comment: For more information, refer to Universal Serial Bus Specification, Revision 2.0, A pril 2000.
General Comment: The load is 100 ohm differential for these parameters, unles s otherwis e specified.
General Comment: To comply with the values pres ented in this table, refer to your local
Marvell representative for register settings.
1. Defined with 1.425 kilohm pull-up resistor to 3.6V.
2. Defined with 14.25 kilohm pull-down resistor to ground.
3. See "Data Signal Rise and Fall Time" waveform.
4. Defined from 10% to 90% for ris e time and 90% to 10% for fall time.
5. Including frequency tolerance. Timing difference betw een the differential data signals.
Defined at crossover point of differential data signals.
Driver P aramet ers
Receiver Pa rameter s
1.5
Note sDescription Symbol Units
Low Speed