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SCG2000I Dataheets PDF



Part Number SCG2000I
Manufacturers Connor-Winfield
Logo Connor-Winfield
Description Synchronous Clock Generators
Datasheet SCG2000I DatasheetSCG2000I Datasheet (PDF)

SCG2000i Synchronous Clock Generators PLL 2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630- 851- 4722 Fax: 630- 851- 5040 www.conwin.com Application The Connor-Winfield SCG2000i provides high precision phase lock loop frequency translation for the telecommunication applications that require a temperature range of -40°C to 85°C. SCG2000i is well suited for use in line cards, service termination cards and similar functions to provide reliable reference, phase locked, synchronization and.

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SCG2000i Synchronous Clock Generators PLL 2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630- 851- 4722 Fax: 630- 851- 5040 www.conwin.com Application The Connor-Winfield SCG2000i provides high precision phase lock loop frequency translation for the telecommunication applications that require a temperature range of -40°C to 85°C. SCG2000i is well suited for use in line cards, service termination cards and similar functions to provide reliable reference, phase locked, synchronization and low phase gain for TDM, PDH, SONET and SDH network equipment. The SCG2000i provides a jitter filtered, wander following output signal synchronized to a superior Stratum or peer input reference signal. Features • Industrial Temperature Range • 3.3V High Precision PLL • Tri-State Capability • Active Alarms • Guaranteed Free Run (20ppm for 19.44MHz output and 30ppm for 125.0 MHz) • 1 Sec. Acquisition Time www.DataSheet4U.com Bulletin Page Revision Date Issued By SG048 1 of 16 P02 28 Oct 02 MBATTS General Description The SCG2000i provides high precision phase lock loop frequency translation for the telecommunication applications. The SCG2000i generates a CMOS output from an intrinsically low jitter, voltage controlled crystal oscillator. while providing a jitter attenuated, internal reference that is connected to a Reference Output pin. SCG2000i is well suited for use in line cards, service termination cards and similar functions to provide reliable reference, phase locked, synchronization for TDM, PDH, SONET and SDH network equipment . The SCG2000i provides a low phase gain (<0.2dB), jitter filtered, wander following output signal synchronized to a superior Stratum or peer input reference signal. The SCG2000i include the following features: Free Run, Tristate and alarm outputs for Loss-of-Reference, (LOR), Loss-ofLock, (LOL). During the LOR alarm, the SCG2000i will also enter a Free Run state which will guarantee a 20 ppm accurate output with the 19.44 MHz model and 30 ppm accurate output with the 125.0 MHz model. Additionally the Free Run mode may be entered manually by asserting a high signal to the Free Run Enable pin. The outputs, except the oscillator output, may be put into the tri-state high impedance condition for external testing purposes by asserting a high signal to the Tri-State Enable pin. The SCG2000i is 3.3 Volt components that typically draw less than 100 mA. All models have an acquisition time of approximately 1.0 second and can be used in applications that require temperature rating of -40° to 85° C. All models have a 33Ω resistor in series with the oscillator output. The SCG2000i maximum package dimensions are .78” x .83” x .35” on a six layer FR4 board with surface mount pins. Parts are assembled using high temperature solder to withstand surface mount reflow process. Functional Block Diagram Figure 1 Tri-State Enable (Pin 10) LOL Alarm Output (Pin 7) ALARM DETECTION Free Run Enable (Pin 5) LOR Alarm Output (Pin 6) Reference Input (Pin 8) DIVIDER DPFD ANALOG FILTER FREE RUN CONTROL VCXO Oscillator Output (Pin 9) Optional Oscillator Output (Pin 1) DIVIDER Input Freq. Select A (Pin 14) Reference Output (Pin 1) (Not available on models with optional oscillator output) Input Freq. Select B (Pin 13) Model Comparison Table Table 1 Model SCG2000 SCG2000i SCG2010 Input Ref Freq 8-64 kHz 8-16 kHz 19.44 MHz Max Duty Cycle 40/60 45/55 40/60 40/60 45/55 40/60 40/60 Reference Output (Pin #1) = Input Ref Freq. = Input Ref Freq. 8 kHz 19.44 MHz = Input Ref Freq. 19.44 MHz 51.84 MHz, 77.76 MHz Oscillator Output (Pin #9) 1.544 MHz to 125.0 MHz 19.44 MHZ, 125.0 MHz 19.44 MHz 77.76 MHz 1.544 MHz to 125.0 MHz 77.76 MHz 51.84 MHz, 77.76 MHz Ref Output = Osc Output Tight Duty Cycle Notes Basic Model Industrial Temp. Range SCG2020 19.44 MHz www.DataSheet4U.com SCG2030 8-64 kHz SCG2050 SCG2070 8-64 kHz 19.44 MHz *Features which differentiate a model from the base model (SCG2000) are highlighted in boldface color and in the notes column. Data Sheet #: SG048 Page 2 of 16 Rev: P02 Date: 10 / 28 / 02 © Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Pin Description Table 2 Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Connection Reference Output TCK TMS Ground Free Run Enable/TDI Loss of Reference (LOR) Loss of Lock (LOL) Reference Input Oscillator Output Tri-State enable Vcc TDO Input Freq. Select B Input Freq. Select A Description Output frequency is dependent on SCG model JTAG pin that is used only by Connor-Winfield for programming. Do not connect JTAG pin that is used only by Connor-Winfield for programming. Do not connect Ground Free Run enable pin. 1 = Free Run. Input is pulled to GND Alarm indicator. 1 = The reference has been lost. Alarm indicator. 1 = Phase lock has been lost Input reference frequency Output frequency is dependent on SCG model Tri State control for all outputs except Oscillator Output. 1 = Hi-Z, 0 = normal. Input is pull.


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