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MIC2551_08 Datasheet, PDF (6/11 Pages) Micrel Semiconductor – USB Transceiver | |||
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MIC2551
Timing Diagrams
OE#
VP/VM
D+/Dâ
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
Dâ
VOH
tPLH
VCRS
tPHL
VOL
VSS
Figure 3. Receiver Propagation Delay
Test Circuits
M9999-112008
VOH
VOL
tPLH
D+
VCRS
Differential
Data Lines
Dâ
tPHL
VCRS
Figure 4. Driver Propagation Delay
D.U.T.
25pF
Figure 5. Load for VP, VM, RCV
VTRM
15k
D.U.T. 20â¦
15k
CL
Figure 6. Load for D+, Dâ
6
Micrel, Inc.
November 2008
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