FT903L-R datasheet(42/67 Pages) BRIDGETEK

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FT900

/1/2/3 Revision C Embedded Microcontroller Datasheet

Version 1.0

Document No. BRT_000172 Clearance No.: BRT#087

Analog USB I/O pins dynamic characteristics

Parameter

Description

Minimum

Typical

Maximum

Units

Conditions

Driver characteristic for high speed

Thsr

High speed differential

rise time

500

Thsf

High speed differential

fall time

500

Driver characteristic for full speed

Tfr

Rise time of DP/DM

Cl=50pF

10%~90% of |Voh–Vol|

Tff

Fall time of DP/DM

Cl=50pF

10%~90% of |Voh–Vol|

Tfrma

Differential rise/fall

time matching

110

The first transition

exclude from the

idle mode

Driver characteristic for low speed

Tlr

Rise time of DP/DM

300

Cl=200pF~600pF

10%~90% of |Voh–Vol|

Tlf

Fall time of DP/DM

300

Cl=200pF~600pF

10%~90% of |Voh–Vol|

Tlrma

Differential rise/fall

time matching

125

The first transition

exclude from the

idle mode

Table 5-10 - Analog I/O pins (D_DP/D_DM, H_DP/H_DM) characteristics

Figure 5-1 - USB Rise and Fall Times for DP/DM

FT903L-R Datasheet(PDF) 42 Page - Bridgetek Pte Ltd.

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