MIC2550(1999) Просмотр технического описания (PDF) - Micrel

Номер в каталоге

Компоненты Описание

производитель

MIC2550
(Rev.:1999)

Universal Serial Bus Transceiver

Micrel 

MIC2550

OE# = 0 (Transmit):

Input

VP

VM

0

0

0

1

1

0

1

1

OE# = 1 (Receive):

Input

D+

D–

0

0

0

1

1

0

1

1

Output

D+

D–

0

0

0

1

1

0

1

1

Output

VP

VM

0

0

0

1

1

0

1

1

Table 1. Truth Table

RCV

X

0

1

X

RCV

X

0

1

X

Test Circuits

Device

Under

Test

Test

Point

24Ω

500Ω

50pF

V

For D+/D–:

V = 0V for tPZH and tPHZ

V = VBUS for tPZL and tPLZ

Load for Enable and Disable Time (D+/D–)

Device

Under

Test

25pF

Result

SE0

Logic 0

Logic 1

Undefined

Result

SE0

Logic 0

Logic 1

Undefined

Micrel

MIC2550

VP, VM, and RCV Load

Device

Under

Test

VTRM

1.5kΩ*

24Ω

15kΩ CL

CL = 50pF, full speed

CL = 50pF, low speed (minimum timing)

CL = 600pF, low speed (maximum timing)

*1.5k on D– for low speed or D+ for high speed

D+ and D– Load

6

October 4, 1999

Share Link: