MIC2551BTS 데이터 시트보기 (PDF) - Micrel

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MIC2551BTS

USB Transceiver

Micrel 

MIC2551

Timing Diagrams

OE#

VP/VM

D+/D–

TRANSMIT

tPVZ

tPZD

RECEIVE

tPDZ

tPZV

Figure 1. Enable and Disable Times

Differential

Data Lines

Rise Time

Fall Time

90%

10%

tR

90%

10%

tF

Figure 2. Rise and Fall Times

D+

VCRS

Differential

Data Lines

D–

VOH

tPLH

VCRS

tPHL

VOL

VSS

Figure 3. Receiver Propagation Delay

Test Circuits

M9999-112008

VOH

VOL

tPLH

D+

VCRS

Differential

Data Lines

D–

tPHL

VCRS

Figure 4. Driver Propagation Delay

D.U.T.

25pF

Figure 5. Load for VP, VM, RCV

VTRM

15k

D.U.T. 20Ω

15k

CL

Figure 6. Load for D+, D–

6

Micrel, Inc.

November 2008

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