MIC2551 Datasheet, PDF (6/10 Pages) Micrel Semiconductor – USB Transceiver

MIC2551
Timing Diagrams
OE#
V_P/V_M
D+/D–
TRANSMIT
t_PVZ
t_PZD
RECEIVE
t_PDZ
t_PZV
Figure 1. Enable and Disable Times
Differential
Data Lines
Rise Time
Fall Time
90%
10%
t_R
90%
10%
t_F
Figure 2. Rise and Fall Times
D+
V_CRS
Differential
Data Lines
D–
V_OH
t_PLH
V_CRS
t_PHL
V_OL
V_SS
Figure 3. Receiver Propagation Delay
Test Circuits
V_OH
V_OL
t_PLH
D+
V_CRS
Differential
Data Lines
D–
t_PHL
V_CRS
Figure 4. Driver Propagation Delay
D.U.T.
25pF
Figure 5. Load for V_P, V_M, RCV
VTRM
15k
D.U.T. ^20Ω
15k
C_L
MIC2551
Figure 6. Load for D+, D–
6
Micrel
January 2003