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| CALIFORNIA MICRO DEVICES PAC560GTL High Performance GTL Termination Network for Socket 370 Processors Features * 24 terminations in a single package * 5 chip solution for all 119 GTL terminations * High speed termination network * Center ground pin placement reduces ground bounce and eases board layout * Very low cross-talk * Saves board space and reduces assembly cost Applications * High Performance Servers * High Performance Desk Top Systems * Intel CeleronTM and PentiumTM CPUs Application Information High speed microprocessors demand unique, high speed bus termination. The PACGTL Termination Network provides 24 terminations per package and meets the requirements for high speed terminations. The termination resistor values are 56 or 120 ohms each. Five devices provide the necessary terminations for the 32-bit address bus, 64-bit data bus, and the control of status signals. Potential board layout solutions are included in this datasheet. This termination network provides high performance, high reliability, and low cost through manufacturing efficiency. The termination resistor elements are fabricated using state-of-the-art thin film manufacturing. This integrated solution is silicon-based and has the same reliability characteristics of today's microprocessor products. The thin film resistors have very high stability over temperature, over applied voltage, and over life. In addition, the QSOP (SSOP) industry standard packaging is easy to handle in manufacturing and yields high reliability similar to other semiconductor components. STANDARD CONFIGURATION S TA N D A R D PA R T O R D E R I N G I N F O R M AT I O N Package Pins 28 28 Style QSOP QSOP Ordering Part Number Part Marking PAC560GTL PAC121GTL When placing an order please specify desired shipping: Tubes or Tage & Reel. All trademarks are the property of their respective holders. P/Active(R) is a registered trademark and PACTM is a trademark of California Micro Devices. (c) 2000 California Micro Devices Corp. All rights reserved. 7/31/2000 C0970500 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1 CALIFORNIA MICRO DEVICES S TA N D A R D VA L U E S Resistor (R) Absolute Tolerance (R) TCR Operating Temperature Range Max Package Power Rating (70C) Minimum Insulation Resistance Cross-talk* 56 or 120 5% 150ppM 0C to 70C 1W 10,000M 4% PAC560GTL R( ) 56 120 Code 560 121 Power Rating/ Resistor 100mW 40mW RECOMMENDED LAYOUT FOR SOCKET 370 (OPTION A) FOR CELERONTM AND MENDOCINOTM CPUs 11-mil track pitch, single layer Note: This option requires 1 metal layer in board routing for all 119 GTL termination lines. (c)2000 California Micro Devices Corp. All rights reserved. 2 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 7/31/2000 CALIFORNIA MICRO DEVICES RECOMMENDED LAYOUT FOR SOCKET 370 (OPTION B) FOR CELERONTM AND MENDOCINOTM CPUs PAC560GTL Note: This option requires 2 metal layers in board routing for all 119 GTL termination lines. Please note that the second layer only uses 6 short traces, minimizing potencial interference with other traces, and also minimizing the number of vias. (c) 2000 California Micro Devices Corp. All rights reserved. 7/31/2000 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 3 |
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