VITESSE
Preliminary Data Sheet
VSC7939
SONET/SDH 3.125Gb/s
Laser Diode Driver with Automatic Power Control
Page 4
G52350-0, Rev 3.2
02/26/01
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano
Camarillo, CA 93012
Tel: (800) VITESSE
FAX: (805) 987-5896
Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Absolute Maximum Ratings
(1)
Power Supply Voltage (V
CC
).............................................................................................................-0.5V to +7V
Current into BIAS.....................................................................................................................-20mA to +150mA
Current into OUT+, OUT-...............................................................................................................................TBD
Current into MD.............................................................................................................................-5mA to +5mA
Current into FAIL.........................................................................................................................-10mA to 30mA
Voltage at DATA+, DATA-, CLK+, CLK-, ENABLE, LATCH.........................................-0.5V to (V
CC
+ 0.5V)
Voltage at APCFILT, MODSET, BIASMAX, APCSET, MD, FAIL.............................................-0.5V to +3.0V
Voltage at OUT+, OUT- .....................................................................................................-0.5V to (V
CC
+ 1.5V)
Voltage at BIAS..................................................................................................................-0.5V to (V
CC
+ 0.5V)
Continouous Power Dissipation (T
A
= +85
°
C, TQFP derate 20.8mW/
°
C above +85
°
C) .......................1350mW
Operating Junction Temperature Range...................................................................................... -55
°
C to +150
°
C
Storage Temperature Range ........................................................................................................-65
°
C to +165
°
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
).....................................................................................................+3.135V to +5.25V
Negative Voltage Rail (GND) ............................................................................................................................0V
Modulation Current (I
MOD
)
(1)
.......................................................................................................................30mA
Ambient Temperature Range (T
A
)................................................................................................. -40
°
C to +85
°
C
NOTE:
(1) V
CC
= 3.3V, I
BIAS
= 60mA.