STV0684 Datasheet, PDF (28/49 Pages) STMicroelectronics – Digital Camera Processor

Electrical Characteristics
STV0684
4.5.3
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 Ω +/-5%) between the pads and the USB cable.
The operation of the USB transceiver is guaranteed through design and application testing.
Table 8: AC characteristics of USB transceiver
Symbol
Description
Transmit /Output stage
tlr
Fall time
tlf
Rise time
tlrfm
Rise and fall time matching
System
Rpu
USB differential pad Dp,
Dn pullup Resistor
Rpd
USB differential pad Dp,
Dn pulldown Resistor
Min.
Typ.
Max
Unit
4.45
5.82
7.31
ns
4.55
5.77
6.81
ns
90
111
%
1.425
14.25
1.575
kΩ
15.75
kΩ
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