Detailed Specifications

STV0674

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4.5

USB interface

4.5.1

AC electrical characteristics of USB transceiver

All measurements are fully electrically compliant to Chapter 7 (Electrical requirements) of revision 2

of the USB specification for full-speed devices (V1.1). The transceiver has been tested with external

impedance-matching series resistors (27

Table 4: AC characteristics of USB transceiver

Parameter

Description

Min

Typ.

Max

Units

TRANSMIT /OUTPUT STAGE

tlr

fall time

4.45

5.82

7.31

ns

tlf

rise time

4.55

5.77

6.81

ns

tlrfm

rise and fall time matching

90

111

%

SYSTEM

Rpu

USB differential pad Dp,

Dn pullup Resistor

1.425

1.575

k

Ω

Rpd

USB differential pad Dp,

Dn pulldown Resistor

14.25

15.75

k

Ω