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VSC7959YD Datasheet Preview

VSC7959YD Datasheet

3.125Gb/s CML Limiting Amplifier with LOS Detect

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VSC7959YD pdf
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: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 1



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VSC7959YD Datasheet Preview

VSC7959YD Datasheet

3.125Gb/s CML Limiting Amplifier with LOS Detect

No Preview Available !

VSC7959YD pdf
VITESSE
SEMICONDUCTOR CORPORATION
3.125Gb/s CML Limiting Amplifier with LOS Detect
Advance Product Information
VSC7959
Electrical Characteristics
Table 1: DC Specifications
Symbol
Parameter
Min Typ Max Units
Conditions
VCC
ICC
IEE
ICCSQ
IEESQ
ISQ
PSSR
Power Supply Voltage
Power Supply Current(1)
Power Supply Current(1)
Power Supply Current when
Squelched(1)
Power Supply Current when
Squelched(1)
Squelch Input Current
Power Supply Rejection Ratio
3.135
5.5 V
31 mA VCC = 3.3V
35 mA VCC = 5V
38 mA VCC = 3.3V
43 mΑ VCC = 5V
21 mA VCC = 3.3V
25 mA VCC = 5V
24 mA VCC = 3.3V
28 mA VCC = 5V
0 400 µA
20 30
dB f < 2MHz
NOTE: (1) See Figure 5 for supply current measurement setup.
Table 2: DC Specifications
Symbol
VIN
JD
JR
tR, tF
VN
RDIFF
fL
VSQ
VCML
ZO
Parameter
Data Rate
Input Voltage Range
Deterministic Jitter
Random Jitter
Rise and Fall Times
Input Referred Noise
Differential Input Resistance
Low Frequency Cutoff
Output Signal When Squelched
CML Output Voltage
Output Resistance
Min Typ Max Units
Conditions
3.125
10
55
100
2
2
550
1100
100
1200
25
8
100
230
20
1200
1800
20
Gb/s
mV
ps
ps
ps
µV
MHz
kHz
mV
mV
mV
mV
Peak-to-peak
See Note 1
See Note 2, RMS
20% to 80%
RMS, IN+ to IN-
IN+ to IN-
CZ open
CZ = 0.1µF
Output AC-coupled
Level = open, RL = 50
Level = GND, RL = 75
Squelched
Single-ended
NOTES: (1) Deterministic jitter measured peak-to-peak with K28.5 pattern. (2) Random jitter measured with minimum input.
Page 2
© VITESSE SEMICONDUCTOR CORPORATION 741 Calle Plano Camarillo, CA 93012
Tel: (800) VITESSE FAX: (805) 987-5896 Email: prodinfo@vitesse.com
Internet: www.vitesse.com
G52358-0, Rev 2.0
02/09/01


Part Number VSC7959YD
Description 3.125Gb/s CML Limiting Amplifier with LOS Detect
Maker ETC
Total Page 10 Pages
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