SCG2550

SCG2550 CONNOR-WINFIELD | Alldatasheet

Document overview

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Technical content

Features

• Phase Locked Output Frequency Control  Intrinsically Low Jitter Crystal Oscillator  Two Selectable References @ 8 kHz  Alarm Output  Tri-Statable Alarm Outputs  Force Free Run Function  Automatic Free Run Operation upon loss of both references  Input Duty Cycle Tolerant  3.3 Volt Power Supply  Small Size: 0.78” x 0.83” x 0.35” maximum  Surface Mount, DIL Package

Preliminary Data Sheet #: SG045 Page 2 of 8 Rev: P02 Date: 12/16/02 © Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Operating Specifications Table 2 Parameter Specifications Notes Voltage 3.3V ±5% 1.0 Current 150 mA @ 3.46V Input Frequency Ref 1 and Ref 2 8 kHz 2.0 Available Oscillator Output Frequencies 19.44, 38.88, or 77.76 MHz Reference Output Frequency 19.44 MHz Temperature Range 0 to 70°C Input Jitter Tolerance 31.25us Typical (Input Jitter Frequencies > 10 Hz) Jitter Bandwidth < 10 Hz Acquisition Time Approximately 1 second 3.0 Capture/Pull-In Range ± 25 ppm Minimum Output Duty Cycle 40/60 % Min/Max @ 50% Level Output Rise and Fall Time 3 nS @ 20% to 80% output level Output Load 30 pF Alarm LOR/LOL S tatus Signal Output Free Run Accuracy ±20 ppm Package Fr4 SM 0.78” x 0.83” x 0.350” (Maximum) MTIE @ Synchronization Rearrangement GR-253-CORE, 1999 R5-136 4.0, 4.1 Reference Output/Oscillator Output Offset ≤ 8 ns Dynamic Offset ± 50 ns Maximum 5.0 Absolute Maximum Rating Table 1 Symbol Par ameter Minimum Nominal Maximum Units Notes VCC Power Supply Voltage -0.5 - +4.0 Volts VI Input Voltage -0.5 - +5.5 Volts TS Storage Temperature -65.0 - +150.0 °C Input and Output Characteristics Table 3 Symbol Par ameter Minimum Nominal Maximum Units Notes VIH High level input voltage 2.0 - 5.5 V VIL Low level input voltage 0 - 0.8 V TIO I/O to output valid - - 10 nS COUT Output capacitance - - 10 pF VHO High level output voltage loh = -4mA 2.40 - - - Vcc Min VIO Low Level output voltage lo1 = 8mA - - 0.4 - Vcc Max TIR Input reference signal pulse width 30 - - nS

Preliminary Data Sheet #: SG045 Page 3 of 8 Rev: P02 Date: 12/16/02 © Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Output Jitter Specifications Table 4 Jitter BW 10 Hz - 1 MHz SONET Jitter BW 12 kHz - 20 MHz Frequency (MHz) pS (RMS) m UI pS (RMS) m UI Input Selection / Output Response Table 5 INPUTS OUPUTS Reset/ Oscillator 19.44 MHz Notes Tri-State SEL AB REFA REFB FR FR status Alarm Output Output

1 X XXXT S T S F R T S

01 N A A001 U U 6 . 0 0 0 NA A 0 0 1 LRB LRBD 01 AN A 001 U U 6 . 0 0 0 A NA 0 0 0 LRA LRAD

0 X NA NA 0 1 1 FR FR

NOTES:

1.0 Requires external regulation

2.0 Externally selectable via Input Select AB

3.0 From a 10 ppm offset in reference frequency

4.0 Entry into Free Run doesn’t meet requirement for initial 2.33 seconds of self-timing

4.1 If the selected reference is removed, system response to the ALARM must be less than 10µs

5.0 Offset change between Reference Input and Reference Output over temperature range from room temperature 6.0 On alarm assertion, switch references. If alarm is still active, force Free Run TS = Tri-State U = Unstable FR = Free Run LRAD = Locked to Ref A and divided down LRA = Locked to Ref A LRAB = Locked to ref B and divided down LRB = Locked to Reb B X = Don’t cart

Preliminary Data Sheet #: SG045 Page 4 of 8 Rev: P02 Date: 12/16/02 © Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Alarm Timing Figure 3 Package Maximum Dimensions Figure 2 Alarm upon Loss of Reference REFERENCE ALARM Alarm upon Loss of Lock EXT 8K REF INT 8K REF ALARM Point at which -90 < φ < 90 is held within that range } Φ φ < - 90 or > 90 = 31.25us Circuit Board Footprint Figure 1 0.650 0.100 TYP

0.050 TYP

0.800 0.640 0.080 (16.51mm) (1.27mm) (16.26mm) (20.32mm) (2.03mm) (1.27mm) (2.54mm)

Preliminary Data Sheet #: SG045 Page 5 of 8 Rev: P02 Date: 12/16/02 © Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice 8 kHz PHASE ALIGNERREF B (8 kHz) REF A (8 kHz) SELECT AB DPFD ANALOG FILTER 1 / N ALARM OUTPUT LOW JITTER VCXO FREE RUN ENABLE FREE RUN STATUS

19.44 MHz

1 19.44 MHz Reference Output

2 TCK

3 TMS

4 Ground

5 Free Run / TDI (1 = Free Run)

6 Alarm Output (1 = Alarm)

7 REF B - 8 kHz

8 REB A - 8 kHz

9 Oscillator Output

10 Free Run Status Pin (FR = 1)

11 Vcc

12 TDO

13 Reset / Tri-State

14 Input Frequency Select AB (A = 0, B = 1)

Preliminary Data Sheet #: SG045 Page 6 of 8 Rev: P02 Date: 12/16/02 © Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice MEETS EIA-481A AND EIAJ-1009B

1.00 DIA

250 PCS/REEL MAXIMUM

.08 3.15 13.00

8.45 DIA

.08 1.31 .08 DIRECTION OF FEED (CUSTOMER) (33.27mm) (2.0mm)(2.0mm) (330.2mm) (80mm) (2.0mm) (214.6mm) DIA (25.4mm) (Bo) POCKET SIZE (Ao) (Ko) 20.92mm (.824") 21.17mm (.833") 9.49mm (.374") 32mm (1.26") WIDTH 32mm (1.26") PITCH 6.99mm (.275")(KI) .374 AD (9.49mm) .014 (.36mm) (28.4mm) 1.118 .559 (14.2mm) .079 (2mm) DIA. MIN. .059 (1.5mm) DIA. .063 (1.6mm) DIA. .069 (1.75mm) (4mm) .157 (2mm) .079 .063 (1.6mm) .059 (1.5mm).065 .072 (1.85mm) (1.65mm) (Ko) (20.92mm) .824 .833 (Bo) (21.17mm) BD 1.26 (32.0mm) .275 (6.99mm) (1.93mm).076 45° 19.4° .383 (9.74mm) (6.00mm) .236 (3.00mm) .118 .138 (3.51mm) W P Tape and Reel Packaging Figure 5

Preliminary Data Sheet #: SG045 Page 7 of 8 Rev: P02 Date: 12/16/02 © Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Temp 100 150 200 250 12345678 Time (minutes) (Deg C) Recommended Reflow Profile Peak Temp: 217 Deg C Max Rise Slope: 1.5 Deg C/Sec Time Above 150 C: 100 Sec Solder Profile Figure 6

Ordering Information

XXXX equals a specific model (2550) FFF.FFF equals the Oscillator Output frequency (019.44, 038.88, 077.76) M equals MHZ and is added to all part numbers Example: To order an SCG2550 with an Oscillator Output of 77.76 MHz, Order part number SCG2550-077.76M Please contact Connor-Winfield for other frequencies that may be available.

Revision Revision Date Note P00 2/25/02 Preliminary Informational Release P01 7/1/02 Corrected reference frequency errors P02 12/16/02 Corrected Table 5