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PDF VSC7969 Data sheet ( Hoja de datos )
| Número de pieza | VSC7969 | |
| Descripción | 3.125Gb/s Integrated Transimpedance and Limiting Amplifier | |
| Fabricantes | Vitesse Semiconductor | |
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VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7969
3.125Gb/s Integrated Transimpedance
and Limiting Amplifier with Signal Detect
Features
• Integrated TIA and Limiting Amplifier
• Low Power Consumption for SFF Applications
• TO Package-Compatible Layout
• On-Chip Signal Detect
• On-Chip Linear Photocurrent Monitor
• Single 3.3V Supply
• 5V Supply Operation via Wirebond Option
• Compatible with PIN or Avalanche Detectors
• Packages: 16-Pin TSSOP, TO-46, Bare Die
Applications
• 2.488Gb/s, 3.125Gb/s SONET OC-48/
SDH STM-16
• 2.125Gb/s Fibre Channel
• 2.5Gb/s or 3.125Gb/s Ethernet Applications with
8B/10B Overhead
• SFF Transceivers
General Description
The VSC7969 is a 3.125Gb/s transimpedance amplifier IC with a built-in limiting amplifier, a signal detect
feature and a photocurrent monitor. The VSC7969 does not require any external electrical components in the
construction of a high performance optical receiver such as for SONET/SDH applications. The analog output is
a differential signal with a minimum amplitude of 200mVp-p (single-ended). The VSC7969 operates with a sin-
gle power supply with a maximum power dissipation of 300mW. A PIN photodiode or APD can be connected
and separately biased to provide optimal performance.
The VSC7969 provides filtered bias for MSM and PIN photodetectors; applications using an APD photode-
tector must supply bias separately. The VSC7969 also provides a photocurrent monitor whose output is linearly
proportional to the input photocurrent.
The VSC7969 can operate from a single +3.3V supply or a +5V or -5.2V supply. The VSC7969 is offered
in die form and in a 16-pin plastic thin-shrink small outline package (TSSOP-16). A fully tested TO-46 outline
packaged receiver with a photodetector is also available.
Block Diagram
Filter
In
VSC7969
+3.3V
+5V
Regulator
+3.3V
50Ω 50Ω
Monitor
Signal
Detect
VCCS
VCCD
Dual power supply pins are
provided for +5V or +3.3V
operation. Only one power
supply pin should be connected.
GND
VOUTP
Outputs need to
be AC-coupled
VOUTN 0.1µF
0.1µF
SD_OUT
SD_ADJ
IMON
G52355-0, 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
Page 1
1 page  
www.DataSheet4U.com
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7969
3.125Gb/s Integrated Transimpedance
and Limiting Amplifier with Signal Detect
Table 3: Pad Coordinates
Signal
Name
GND
BG_VREF
GND
SD_TP
SD_ADJ
Pad
Number
1
2
3
4
5
Coordinates (µm)
XY
130 250
130 375
130 500
130 625
130 750
VOUTN
6 137 875
SD_OUT
GND
VOUTN
GND
VOUTP
GND
IMON
VOUTP
GMD
CSDN
CSDP
GND
GND
GND
GND
FILTER
IN
GND
VCCS
VCCD
7 280 875
8 405 875
9 530 875
10 655 875
11 780 875
12 905 875
13 1030 875
14 1173 875
15 1180 750
16 1180 625
17 1180 500
18 1180 375
19 1180 250
20 1030 125
21 905 125
22 780 125
23 530 125
24 405 125
25 280 125
26 137 125
Description
Negative power supply rail (typically 0V)
Band Gap voltage reference 1.24V for testpoint, no connect
Negative power supply rail (typically 0V)
Signal Detect test point, DO NOT CONNECT.
Signal Detect threshold adjustment (see Application amd Usage
section)
Complementary logic output (logic LOW when photocurrent is
HIGH)
Signal detect output (logic HIGH when photocurrent exceeds
SDA)
Negative power supply rail (typically 0V)
Complementary logic output (logic LOW when photocurrent is
HIGH)
Negative power supply rail (typically 0V)
Positive logic output (logic HIGH when photocurrent is HIGH)
Negative power supply rail (typically 0V)
Photocurrent Monitor
Positive logic output (logic HIGH when photocurrent is HIGH)
Negative power supply rail (typically 0V)
Test point for Signal Detect capacitor. DO NOT CONNECT.
Test point for Signal Detect capacitor. DO NOT CONNECT.
Negative power supply rail (typically 0V)
Negative power supply rail (typically 0V)
Negative power supply rail (typically 0V)
Negative power supply rail (typically 0V)
Photodetector cathode connection (filtered VCC)
Photodetector anode connection
Negative power supply rail (typically 0V)
Positive power supply rail for 3.3V operation
Positive power supply rail for 5V operation
G52355-0, Rev 2.0
02/09/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 5
5 Page 
www.DataSheet4U.com
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7969
3.125Gb/s Integrated Transimpedance
and Limiting Amplifier with Signal Detect
Package Information
TSSOP-16
1. All dimensioning and tolerancing per ASME. Y14.5-1994
2. Controlling dimension: millimeter
3. This outline conforms to JEDEC Publication 95 Registration MS-026
G52355-0, Rev 2.0
02/09/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 11
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet VSC7969.PDF ] | |
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