VITESSE
SEMICONDUCTOR CORPORATION
2.7Gb/s Asynchronous
Dual 2x2 Crosspoint Switch
Data Sheet
VSC830
Power-Down
Power to each output stage is provided through V
CC
, V
CCP
, and V
EE
. V
CC
is common to all outputs. To
power off unused outputs, tie the respective V
EE
and V
CCP
pin to V
CC
, as shown in Figure 2.
Figure 2: Power-Down Mode Example
V
CC
V
CCP
1A
V
CCP
2A
V
CCP
1B
V
CCP
2B
V
EE
1A
“ON”
V
EE
2A
“ON”
V
EE
1B
“OFF”
V
EE
2B
“OFF”
Minimum power configuration requires output channel 1A active, so power must be applied to V
CCP
1A
and V
EE
1A at all times.
Programmable input termination
Across each differential input (from the + input to the - input) of the VSC830 is a switched 100
Ω
termina-
tion resistor. Using the TERM_ENABLE pin, the termination can be optionally disabled. To enable the input
termination, connect the respective TERM_ENABLE pin to V
CC
. To disable the internal termination, connect
TERM_ENABLE to V
EE
. If unconnected, the TERM_ENABLE pin will self-bias to V
EE
and disable the inter-
nal termination. Independent termination controls are provided for the “A” and “B” switches.
Page 4
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VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
G52192-0, Rev 4.0
05/23/01
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
