VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7961
Table 3: Loss of Signal Specifications
Symbol
H
LOS
I
LOS
V
THA
3.125Gb/s PECL Limiting Amplifier with LOS Detect
Parameter
LOS Hystersis
LOS Assert/Deassert Time
LOS Assert Threshold
Min
3.1
0.22
12.8
Typ
3.3
0.25
8.2
19.8
57.2
11.4
Max
5.5
0.28
21.8
Units
dB
µs
mV
mV
mV
mV
Conditions
H
LOS
= 20 log (V
THD
/V
THA
)
R
TH
= 2.5kΩ
R
TH
= 7kΩ
R
TH
= 20kΩ
R
TH
= 2.5kΩ
R
TH
= 7kΩ
R
TH
= 20kΩ
I
LOS
= –30µA
I
LOS
= +1.2µA
V
THD
V
LOSH
V
LOSL
LOS Deassert Threshold
LOS Output HIGH Voltage
LOS Output LOW Voltage
26.2
3.3
29.0
75.2
0.168
31.6
mV
mV
V
V
Table 4: Loss of Signal Truth Table
SQUELCH
High
Low
High
Low
LOS
Low
High
Low
Low
Output
Off
On
On
On
Absolute Maximum Ratings
(1)
Power Supply Voltage (V
CC
)............................................................................................................. -0.5V to +6V
Maximum Junction Temperature Range .........................................................................................................TBD
Storage Temperature Range (T
S
)................................................................................................. -55°C to +150°C
NOTE: (1) CAUTION: Stresses listed under “Absolute Maximum Ratings” may be applied to devices one at a time without caus-
ing permanent damage. Functionality at or above the values listed is not implied. Exposure to these values for extended
periods may affect device reliability.
Recommended Operating Conditions
Positive Voltage Rail (V
CC
).................................................................................................................. 3.3V or 5V
Junction Temperature Range (T
J
)................................................................................................ -40°C to +100°C
Ambient Temperature Range (T
A
)................................................................................................. -40°C to +85°C
G52360-0, Rev 2.0
02/09/01
©
VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
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