PIC18LF4550T-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF4550T-I/SO

28/40/44-Pin, High-Performance, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC18F2455/2550/4455/4550

FIGURE 28-21:

USB SIGNAL TIMING

USB Data Differential Lines

90%

VCRS

10%

TLR, TFR

TLF, TFF

TABLE 28-25: USB LOW-SPEED TIMING REQUIREMENTS

Param

No.

Symbol

Characteristic

Min Typ

T01 TLR

T02 TLF

T03 TLRFM

Transition Rise Time

Transition Fall Time

Rise/Fall Time Matching

75

—

75

—

80

—

Max Units

Conditions

300

ns CL = 200 to 600 pF

300

ns CL = 200 to 600 pF

125

%

TABLE 28-26: USB FULL-SPEED REQUIREMENTS

Param

No.

Symbol

Characteristic

Min

T04 TFR

Transition Rise Time

4

T05 TFF

Transition Fall Time

4

T06 TFRFM Rise/Fall Time Matching

90

Typ Max Units

Conditions

—

20

ns CL = 50 pF

—

20

ns CL = 50 pF

— 111.1 %

DS39632E-page 402

© 2009 Microchip Technology Inc.

Share Link: