VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
2.5Gb/s SONET-Compatible
8-Bit MUX/DEMUX Chipset
VSC8021/VSC8022
Table 5: Power Dissipation
(Over recommended operating conditions, V = GND, outputs open circuit)
CC
VSC8021
VSC8022
Parameter
Description
Units
Conditions
Min Typ Max Min Typ Max
I
Power supply current from V
Power supply current from V
Power dissipation
400
110
2.3
600
200
3.75
450
120
2.6
600
200
3.75
mA
mA
W
EE
EE
TT
I
TT
P
D
(1)
Absolute Maximum Ratings
Power Supply Voltage (V )..........................................................................................................-3.0V to + 0.5V
TT
Power Supply Voltage (V )..................................................................................................V + 0.7V to -6.0V
EE
(2)
TT
ECL Input Voltage Applied (V
) ........................................................................................-2.5V to + 0.5V
ECLIN
(2)
High-Speed Input Voltage Applied (V
)............................................................... V -0.7V to V + 0.7V
EE CC
HSIN
Output Current (DC, output HIGH) (I
).................................................................................................-50 mA
OUT
Case Temperature Under Bias (T )...............................................................................................-55ºC to +125ºC
C
(3)
Storage Temperature (T
)......................................................................................................-65ºC to +150ºC
STG
Recommended Operating Conditions
(4)
ECL Power Supply Voltage (V )..................................................................................................-2.0V ± 0.1V
TT
Power Supply Voltage (V )............................................................................................................-5.2V ± 0.26V
EE
(3)
Operating Temperature Range (T)............................. (Commercial) 0ºC to +70ºC, (Industrial) -40ºC to +85ºC
Notes: (1) Caution: Stresses listed under “Absolute Maximum Ratings” may be applied to devices one at a time without causing perma-
nent damage. Functionality at or exceeding the values listed is not implied. Exposure to these values for extended periods may
affect device reliability.
(2) V must be applied before any input signal voltage magnitude ( V
and V
) can be greater than V -0.5V.
TT
ECLIN
HSIN TT
(3) Lower limit of specification is ambient temperature and upper limit is case temperature.
(4) When using internal ECL 100K reference level.
ESD Ratings
Proper ESD procedures should be used when handling this product. The VSC8021/VSC8022 is rated to the fol-
lowing ESD voltages based on the human body model:
1. All ECL pins are rated at or above 1000V.
2. All high-speed clock and data pins at rated at or above 500V.
G52028-0, Rev 4.1
05/25/01
Page 7
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