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| Data Sheet Features * * * * * * For 3G applications Usable bandwidth of 3.84 MHz High attenuation Single-ended operation at 50 Ceramic Surface Mount Package (SMP) Small size Part Number 855915 249.6 MHz SAW Filter * Package Surface Mount 7.01 x 5.51 x 1.63 mm Pin Configuration Bottom View 1 2 3 12 0.76 1.63 NOM. 1.78 MAX. 4 5 6 11 10 7.01 1.27 9 8 7 1.70 5.51 1.27 Pin No. 4 10 1,2,3,5,6 7,8,9,11,12 Description Output Input Case Ground Case Ground 0.79 1.14 Dimensions shown are nominal in millimeters All tolerances are 0.15mm except overall length and width 0.13mm Body: Al2O3 ceramic Lid: Kovar, Ni plated Terminations: Au plating 0.5 - 1.0m, over a 2 - 6m Ni plating Subject to change or obsolescence without notice Rev B 30-Oct-2002 Page 1 of 5 Data Sheet Temperature Range: (2) -10 to +80 oC Part Number 855915 249.6 MHz SAW Filter Electrical Specifications (1) Parameter (3) Center Frequency Minimum Insertion Loss at 249.6 MHz 1 dB Lower Frequency (4) 1 dB Upper Frequency 1 dB Bandwidth 40 dB Lower Frequency (4) 40 dB Upper Frequency 40 dB Bandwidth Passband Ripple 247.68 - 251.52 MHz Group Delay Variation 247.68 - 251.52 MHz Input VSWR 247.68 - 251.52 MHz Output VSWR 247.68 - 251.52 MHz Relative Attenuation (4) 10 - 234.6 MHz 264.6 - 450 MHz Source Impedance (5) Load Impedance (5) Notes: 1. 2. 3. 4. 5. Minimum 251.52 3.84 244.1 45 45 - Typical 249.6 16.11 246.98 251.89 4.89 244.27 254.41 10.14 0.22 27.15 1.25:1 1.34:1 63.5 55.63 50 50 Maximum 20 247.68 5 255.1 11 1 50 2.10:1 2.10:1 - Unit MHz dB MHz MHz MHz MHz MHz MHz dB p-p nsec dB dB All specifications are based on the test circuit shown below In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over temperature Electrical margin has been built into the design to account for the variations due to manufacturing tolerances The attenuation measurements are referenced to average insertion loss over passband This is the optimum impedance in order to achieve the performance shown Test Circuit: Actual matching values may vary due to PCB layout and parasitics 10 110nH 27nH 10 4 82nH 50 120nH 6.8 50 Single-ended 50 82nH 1,2,3,5,6 7,8,9,11,12 Subject to change or obsolescence without notice Rev B 30-Oct-2002 Page 2 of 5 Data Sheet Part Number 855915 249.6 MHz SAW Filter Typical Performance (at +25oC) Subject to change or obsolescence without notice Rev B 30-Oct-2002 Page 3 of 5 Data Sheet Actual matching values may vary due to PCB layout and parasitics 10 110nH 27nH 10 4 82nH Part Number 855915 249.6 MHz SAW Filter Matching Schematics 120nH 6.8 50 Single-ended 50 82nH 1,2,3,5,6 7,8,9,11,12 50 Marking 1.34 PCB Footprint .99 .28 1.34 .28 Date code ID dot SAWTEK 855915 XXXXXX 5.71 .99 7.21 The date code consists of: day of the current year (Julian, 3 digits), last digit of the year (1 digit) and hour (2 digits) This footprint represents a recommendation only Dimensions shown are nominal in millimeters Tape and Reel 2.7 16.8 O330 ID dot 0.3 2.0 4.0 O1.5 A 1.75 7.5 7.3 16.0 O102 Direction of travel O20.2 O13.0 2.0 2.2 Section A-A 5.8 8.0 O1.5 A Dimensions shown are nominal in millimeters Packaging quantity: 3000 units/reel Subject to change or obsolescence without notice Rev B 30-Oct-2002 Page 4 of 5 Data Sheet Parameter Operating Temperature Range Storage Temperature Range Input Power Part Number 855915 249.6 MHz SAW Filter Maximum Ratings Symbol T Tstg Pin Minimum -10 -40 - Maximum +80 +85 +15 Unit C C dBm o o Warnings * * Electrostatic Sensitive Device (ESD) Avoid ultrasonic exposure Links to Additional Technical Information PCB Layout Tips S-Parameters Qualification Flowchart Soldering Profile Other Technical Information Sawtek's liability is limited only to the Surface Acoustic Wave (SAW) component(s) described in this data sheet. Sawtek does not accept any liability for applications, processes, circuits or assemblies which are implemented using any Sawtek component described in this data sheet. Contact Information PO Box 609501 Orlando, FL 32860-9501 USA Subject to change or obsolescence without notice Phone: +1 (407) 886-8860 Fax: +1 (407) 886-7061 Email: custservice@sawtek.com Web: www.sawtek.com Rev B Or contact one of our worldwide network of sales offices, representatives or distributors 30-Oct-2002 Page 5 of 5 |
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