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Datasheet> All Categories > Wireless rf/communication> Telecom circuit> VSC7960RO
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VSC7960RO

Description
Support Circuit, 1-Func, PQFP48, TQFP-48
CategoryWireless rf/communication    Telecom circuit   
File Size275KB，22 Pages
ManufacturerVitesse Semiconductor Corporation
Websitehttp://www.vitesse.com/
Download Datasheet Parametric Compare View All

VSC7960RO Overview

Support Circuit, 1-Func, PQFP48, TQFP-48

VSC7960RO Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerVitesse Semiconductor Corporation
Parts packaging codeQFP
package instructionLFQFP, QFP48,.35SQ,20
Contacts48
Reach Compliance Codeunknown
appATM;SDH;SONET
JESD-30 codeS-PQFP-G48
JESD-609 codee0
length7 mm
Number of functions1
Number of terminals48
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeLFQFP
Encapsulate equivalent codeQFP48,.35SQ,20
Package shapeSQUARE
Package formFLATPACK, LOW PROFILE, FINE PITCH
power supply3.3 V
Certification statusNot Qualified
Maximum seat height1.6 mm
Maximum slew rate0.045 mA
Nominal supply voltage3.3 V
surface mountYES
Telecom integrated circuit typesATM/SONET/SDH SUPPORT CIRCUIT
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.5 mm
Terminal locationQUAD
width7 mm

VSC7960RO Preview

VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7960
Features
• 3.3V Power Supply
• Laser Driver AC-Coupled to Laser Diode
3.125Gb/s CML Limiting Amplifier with LOS Detect
and Laser Driver with Automatic Power Control
Applications
• SONET/SDH at 622Mb/s, 1.244Gb/s, 2.488Gb/s
and 3.125Gb/s
• Full-Speed Fibre Channel (1.062Gb/s)
• Programmable Laser Driver Modulation Current
from 5mA to 60mA
• Programmable Laser Driver Bias Current from
1mA to 100mA
• Laser Driver Enable Control
• Automatic Optical Average Power Control
• Supply Current of 80mA
• CML Limiting Amplifier Outputs
• Packages: 48-Pin TQFP, Bare Die
General Description
The VSC7960 is a single 3.3V supply combination limiting amplifier and laser diode driver for
SONET/SDH applications up to 3.125Gb/s. The limiting amplifier features Loss of Signal (LOS) detect, output
offset correction, and optional output squelch. Laser driver data inputs accept differential PECL signals and the
output modulation and bias currents are easily controlled via external components. The laser diode driver Auto-
matic Power Control (APC) loop maintains a constant average optical power over temperature and lifetime. The
dominant pole of the APC loop can be controlled with an external capacitor. Other features include enable con-
trol, short-circuit protection for the modulation and bias inputs, short rise and fall times, and failure-monitor
output to indicate when the APC loop is unable to maintain the average optical power. The VSC7960 is avail-
able in die form or in a 48-pin TQFP package. The VSC7962 provides similar features to the VSC7960 but the
limiting amplifier has PECL outputs.
Block Diagram
VSC7960
DATA+
VSC7939
DATA-
Laser Driver
OUT+
OUT-
LAO+
LAO-
VSC7959
Limiting Amplifier
IN+
IN-
G52359-0, Rev 2.1
5/01/01
©
VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 1
VITESSE
SEMICONDUCTOR CORPORATION
3.125Gb/s CML Limiting Amplifier with LOS Detect
and Laser Driver with Automatic Power Control
Advance Product Information
VSC7960
Electrical Characteristics
Table 1: Limiting Amplifier DC Specifications
Symbol
V
CC
I
CC
I
EE
I
CCSQ
I
EESQ
I
SQ
PSSR
Parameter
Power Supply Range
Power Supply Current
Power Supply Current
Power Supply Current when Squelched
Power Supply Current when Squelched
Squelch Input Current
Power Supply Rejection Ratio
Min
3.135
Typ
31
38
21
24
Max
3.465
Units
V
mA
mA
mA
mA
Conditions
V
CC
= 3.3V. See Figure 4.
V
CC
= 3.3V. See Figure 4.
V
CC
= 3.3V. See Figure 4.
V
CC
= 3.3V. See Figure 4.
f < 2MHz
0
20
30
400
µA
dB
Table 2: Laser Driver DC Specifications
Symbol
V
CC
I
CC
I
BIAS
I
BIAS-OFF
S
BIAS
Parameter
Power Supply Voltage Range
Supply Current Range
Bias Current Range
Bias Off Current
Bias Current Stability
Bias Current Absolute Accuracy
Min
3.125
Typ
Max
3.465
Units
V
mA
mA
µA
ppm/°C
%
V
Conditions
R
MODSET
=7.3kΩ, R
BIASMAX
=4.8kΩ
I
BIAS
and I
MOD
excluded, V
CC
=3.3V
Voltage at BIAS pin=(V
CC
-1.6)
ENABLE=low or DISABLE=high
(1)
APC open loop. I
BIAS
=100mA
APC open loop. I
BIAS
=1mA
Refers to part-to-part variation.
TBD
1
230
900
±15
1.5
18
-480
-15
5
±15
-480
-50
250
37
29
50
90
45
100
100
VR
MD
I
MD
Monitor Diode Reverse Bias Voltage
Monitor Diode Reverse Current Range
Monitor Diode Bias Setpoint Stability
Monitor Diode Bias Absolute Accuracy
1000
480
15
60
200
480
µA
ppm/°C
%
mA
µA
%
ppm/°C
A/A
A/A
ENABLE=low or DISABLE=high
(1)
See Note 2
I
MOD
=60mA
I
MOD
=5mA
I
BIAS
/I
BIASMON
I
MOD
/I
MODMON
I
MD
=1mA
(1)
I
MD
=18µA
(1)
Refers to part-to-part variation.
I
MOD
Modulation Current Range
Modulation Current Absolute Accuracy
Modulation Current Stability
I
MOD-OFF
Modulation Off Current
A
BIAS
A
MOD
BIASMON to I
BIAS
Gain
MODMON to I
MOD
Gain
function does not change with temperature.
NOTES: (1) Both
I
BIAS
and I
MOD
will turn off if any of the current set pins are grounded. (2) Assumes laser diode to monitor diode transfer
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
G52359-0, Rev 2.1
05/01/01
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7960
Symbol
Data Rate
V
IN
J
D
J
R
t
R,
t
F
v
N
R
DIFF
f
L
V
SQ
V
CML
Z
OUT
Input Voltage Range
Deterministic Jitter
Random Jitter
Rise/Fall Times
Input Referred Noise
Differential Input Resistance
Low Frequency Cut-off
Output Signal when Squelched
3.125Gb/s CML Limiting Amplifier with LOS Detect
and Laser Driver with Automatic Power Control
Table 3: Limiting Amplifier AC Specifications
Parameter
Min
3.125
10
1200
25
8
55
100
2
2
20
550
CML Output Voltage
Output Resistance
1100
100
1200
1800
20
Ω
mV
100
230
Typ
Max
Units
Gb/s
mV
ps
ps
ps
µV
W
MHz
kHz
mV
Conditions
peak-to-peak
See Note 1
RMS, see Note 2
20%-80%
RMS, IN+ to IN-
IN+ to IN-
C
Z
open
C
Z
=0.1µF
Outputs AC-coupled
Level=open, R
L
= 50Ω
Level=GND, R
L
= 75Ω
Squelched
Single-ended
NOTES: (1) Deterministic Jitter measured peak-to-peak with K28.5 pattern. (2) Random Jitter measured with minimum input.
Table 4: Laser Driver AC Specifications
Symbol
t
SU
t
H
t
R
t
F
PWD
CID
MAX
t
J
Parameter
Input Latch Setup Time
Input Latch Hold Time
Enable/Start-up Delay
Output Rise Time
Output Fall Time
Pulse Width Distortion
Maximum Consecutive Identical Digits
Jitter Generation
Min
100
100
Typ
Max
Units
ps
ps
Conditions
LATCH=high
LATCH=high
20% to 80%
20% to 80%
See Notes 1, 2
Jitter BW=12kHz to 20MHz,
0-1 pattern.
250
60
60
10
80
7
20
80
80
50
ns
ps
ps
ps
bits
ps
p-p
NOTES: (1) Measured with 622Mb/s 0-1 pattern, LATCH=high. (2) PWD = (wider pulse - narrower pulse) / 2)
G52359-0, Rev 2.1
5/01/01
©
VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 3
VITESSE
SEMICONDUCTOR CORPORATION
3.125Gb/s CML Limiting Amplifier with LOS Detect
and Laser Driver with Automatic Power Control
Advance Product Information
VSC7960
Max
1600
V
CC
-
V
ID
/4
10
Table 5: PECL and TTL/CMOS Inputs and Outputs Specifications
Symbol
V
ID
V
ICM
I
IN
V
IH
V
IL
V
OH
V
OL
Parameter
Differential Input Voltage
Common-Mode Input Voltage
Clock and Data Input Current
TTL Input High Voltage
(ENABLE, LATCH, DISABLE)
TTL Input Low Voltage
(ENABLE, LATCH, DISABLE)
TTL Output High Voltage (FAIL)
TTL Output Low Voltage (FAIL)
Min
100
V
CC
-
1.49
-1
2.0
Typ
V
CC
-
1.32
Units
mV
p-p
V
µA
V
Conditions
(DATA+) - (DATA-)
PECL compatible
0.8
2.4
0.1
V
CC
-
0.3
V
CC
0.44
V
V
V
Sourcing 50µA
Sinking 100µA
Table 6: Limiting Amplifier Loss of Signal Specifications
Symbol
H
LOS
t
LOS
V
THA
Parameter
LOS Hysteresis
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
Conditions
H
LOS
= 20 log (V
THD
/ V
THA
)
R
TH
=2.5kΩ
mV
R
TH
=7kΩ
R
TH
=20kΩ
R
TH
=2.5kΩ
V
THD
V
LOSH
V
LOSL
LOS Deassert Threshold
LOS Output High Voltage
LOS Output Low Voltage
26.2
3.3
29
75.2
31.6
mV
V
R
TH
=7kΩ
R
TH
=20kΩ
I
LOS
=-30µA
I
LOS
=+1.2µA
0.168
V
Table 7: Limiting Amplifier Loss of Signal Truth Table
SQUELCH
High
Low
High
Low
LOS
High
High
Low
Low
Output
Off
On
On
On
Page 4
©
VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
G52359-0, Rev 2.1
05/01/01
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7960
Absolute Maximum Ratings
(1)
3.125Gb/s CML Limiting Amplifier with LOS Detect
and Laser Driver with Automatic Power Control
Power Supply Voltage (V
CC
)...............................................................................................................-0.5V to 6V
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-, ENABLE, LATCH, FAIL......................................................-0.5V to (V
CC
+ 0.5V)
Voltage at MODSET, BIASMAX, APCSET_MD .........................................................................-0.5V to +3.0V
Voltage at BIAS ..................................................................................................................-0.5V to (V
CC
+ 0.5V)
Voltage at OUT+, OUT-......................................................................................................-0.5V to (V
CC
+ 1.5V)
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.........................................................................................................-55°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
)..........................................................................................................................+3.3V
Juntion Temperature Range (T
J
) ..................................................................................................-40°C to +100°C
Ambient Temperature Range (T
A
).................................................................................................-40°C to +85°C
G52359-0, Rev 2.1
5/01/01
©
VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 5
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VSC7960RO Related Products

VSC7960RO VSC7960W
Description Support Circuit, 1-Func, PQFP48, TQFP-48 Support Circuit, 1-Func, DIE-48
Maker Vitesse Semiconductor Corporation Vitesse Semiconductor Corporation
Parts packaging code QFP DIE
package instruction LFQFP, QFP48,.35SQ,20 DIE,
Contacts 48 48
Reach Compliance Code unknown compliant
JESD-30 code S-PQFP-G48 R-XUUC-N48
Number of functions 1 1
Number of terminals 48 48
Maximum operating temperature 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C
Package body material PLASTIC/EPOXY UNSPECIFIED
encapsulated code LFQFP DIE
Package shape SQUARE RECTANGULAR
Package form FLATPACK, LOW PROFILE, FINE PITCH UNCASED CHIP
Certification status Not Qualified Not Qualified
Nominal supply voltage 3.3 V 3.3 V
surface mount YES YES
Telecom integrated circuit types ATM/SONET/SDH SUPPORT CIRCUIT ATM/SONET/SDH SUPPORT CIRCUIT
Temperature level INDUSTRIAL INDUSTRIAL
Terminal form GULL WING NO LEAD
Terminal location QUAD UPPER

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