Data Sheet

www.onsemi.com
6
FSUSB42 — Low-Power, Two-Port, High-Speed, USB2.0 (480Mbps) UART Switch
Test Diagrams
Select
HSD
n
Dn
V
Sel
= 0 orVcc
I
ON
V
ON
R
ON
= V
ON
/ I
ON
GND
V
SW
GND
SW
Select
V
Sel
= 0 orVcc
NC
A
I
Dn(OFF)
V
SW
GND
V Vcc
**Each switch port is tested separately
Figure 4. On Resistance
Figure 5. Off Leakage
R
L
, R
S
, and C
L
are functions of the application
environment (see AC Tables for specific values)
C
L
includes test fixture and stray capacitance.
R
L
C
L
HSD
n
Dn
GND
GND
R
S
V
Sel
V
SW
GND
V
OUT
V
OUT
t
RISE
= 2.5ns
GND
V
CC
90% 90%
10%10%
t
FALL
= 2.5ns
V
CC
/2
V
CC
/2
Input– V
/OE
, V
Sel
Output- V
OUT
90%
V
OH
V
OL
t
ON
t
OFF
90%
V
– V
V
–
Figure 6. AC Test Circuit Load
Figure 7. Turn-On / Turn-Off Waveforms
t
RISE
= 500ps
-400mV
90% 90%
10%10%
t
FALL
= 500ps
0V
Output
t
PHL
+400mV
t
PLH
Figure 8. Propagation Delay (t
R
t
F
– 500 ps)
Figure 9. Intra-Pair Skew Test t
SK(P)