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PDF VSC7959W Data sheet ( Hoja de datos )

Número de pieza VSC7959W
Descripción 3.125Gb/s CML Limiting Amplifier with LOS Detect
Fabricantes ETC 
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VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7959
3.125Gb/s CML Limiting Amplifier with LOS Detect
Features
• 3.3V or 5V Power Supply
• Typical Supply Current of 32mA
• Current-Mode Logic Outputs
• Optional Output Squelch
• Loss of Signal Detect
• Output Offset Correction
• Rise/Fall Times Faster than 100ps
• Packages: TSSOP-16, Bare Die
Applications
SONET/SDH at 622Mb/s, 1.244Gb/s, 2.488Gb/s,
and 3.125Gb/s
Full-Speed Fibre Channel (1.062Gb/s)
Small Form Factor (SFF) Receivers
ATM Optical Receivers
General Description
The VSC7959 is a single supply limiting amplifier with Loss of Signal (LOS) detect for SONET/SDH and
Fibre Channel applications up to 3.125Gb/s. The VSC7959 provides a constant output signal swing for a wide
range of input voltages and has Current-Mode Logic (CML) outputs. The VSC7961 provides the same function-
ality as the VSC7959 with positive emitter-coupled logic (PECL) outputs. Key features of the VSC7959 are its
RMS power detectors for programmable LOS detection, optional output squelch, adjustable output levels,
excellent jitter performance, and fast edge rates. The VSC7959 is available in die form or in a TSSOP-16 pack-
age.
Block Diagram
VSC7959
TH
IN+
100
IN-
RMS Power
Detect and
Control
VCC
8k
VCC
8k
Output Control
LOS
LOS
SQUELCH
LEVEL
OUT+
OUT-
G52358-0, Rev 2.0
02/09/01
Lowpass Filter
Offset Correction
10pF
CZ1 CZ2
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected]
Internet: www.vitesse.com
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VSC7959W pdf
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7959
3.125Gb/s CML Limiting Amplifier with LOS Detect
Bare Die Descriptions
Figure 2: Pad Assignments
Pad1
CAZ1
Pad 2
CAZ2
Pad 3
GNDA
1597µm
(0.06287")
Pad 4
LAINP
Pad 5
LAINM
Pad 6
GNDA
Pad 7
LVL
Pad 8
TH
1597µm (0.06287")
VSC7959
Pad 16
NC
Pad 15
SQ
Pad 14
VCCA
Pad 13
LAOP
Pad 12
LAOM
Pad 11
VCCA
Pad 10
LOS
Pad 9
LOS
Die Size:
1597µm x 1597µm (0.06287" x 0.06287")
Pad Pitch:
180µm (0.00709")
Pad Passivation Opening: 95µm x 95µm (0.00374" x 0.00374")
The back side of the die may either be left floating or connected ot ground.
G52358-0, Rev 2.0
02/09/01
© VITESSE SEMICONDUCTOR CORPORATION 741 Calle Plano Camarillo, CA 93012
Tel: (800) VITESSE FAX: (805) 987-5896 Email: [email protected]
Internet: www.vitesse.com
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