SP5301 Datasheet, PDF (9/13 Pages) Sipex Corporation – Universal Serial Bus Transceiver

AC WAVEFORMS (continued)
2.7V
SPEED
GND
2.7V
D+/D-
GND
50%
tSU
VCR
50%
tSU
VCR
D.U.T.
Test Point
25pF
Figure 6. Setup for Speed
Figure 7. Load for VM, VP, RERR, RSEO and RCV
D.U.T.
Test Point
22Ω
500Ω
50pF
V
V = 0V for tPZH and tPHZ
V = VCC for tPZL and tPLZ
Figure 8. Load for Enable and Disable Times
TEST
D-/LS
D+/LS
D-/FS
D+/FS
D.U.T.
SW1
Close
Open
Open
Close
22Ω
VCC
Test Point
SW1 ^1.5KΩ
15KΩ
CL
CL = 50pF, Full Speed
CL = 350pF, Low Speed
Figure 9. Load for D+/D-
NOTE: V_X = V_OL + 0.3V, V_Y = V_OH - 0.3V, V_CC > +3.0V, V_OL and V_OH are the typical output voltage drops that occur
with the output load.
SP5301DS/10
SP5301 Universal Serial Bus Transceiver
9
© Copyright 2000 Sipex Corporation