PACRAMBUS-1 CALIFORNIA MICRO DEVICES HIGH PERFORMANCE RAMBUS TERMINATION NETWORK FOR RIMM CONNECTOR Features Applications 2 chip solution for all Rambus load terminations, in 20-pin QSOP narrow package 14 Terminations in a single package 1% absolute tolerance 28 ohms terminations across temperature range Center ground pin placement reduces ground bounce and eases board layout Very low cross-talk Saves board space and reduces assembly cost Rambus Memory System Product Description The Direct Rambus memory interface transfers data at both edges of a 400MHz clock resulting in an 800MHz transfer rate. The Rambus channel uses a memory controller on one end of the bus, terminations at the other end, and the RIMM modules in between. The Rambus channel contains control signals and data bus lines that must be terminated in order to prevent any reflections. California Micro Devices PAC RAMBUS-1 integrates fourteen 28-ohm resistors specified at 1% absolute tolerance across the commercial temperature range. E V 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 siliconbased and has the same reliability characteristics as any of todays microprocessor products. The thin film resistors have very high stability over temperature, over applied voltage, and over life. In addition, the QSOP industry standard packaging is easy to handle in manufacturing and yields a high reliability similar to other semiconductor components. STANDARD SPECIFICATIONS Resistor (R) Absolute Tolerance (R) (0° to 70°C) TCR Operating Temperature Range Power Rating/Resistor Max Package Power Rating (70°C) Cross Talk R(Ω) 28 C E J B 28 Ohms ±1% ±150ppm 0°C to 70°C 40mW 1.00W TB D I T SCHEMATIC O Code 280 C0470199 © 2000 California Micro Devices Corp. All rights reserved. 4/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1 PACRAMBUS-1 CALIFORNIA MICRO DEVICES The following lines must be terminated: DQA[8:0]: Data bus A, DQB[8:0]: Data bus B, CFM, CFMN: Clock From Master (positive and negative polarity), ROW[2:0]: Row bus, COL[4:0]: Column bus. STANDARD PART ORDE RING INFORMATION Package Ordering Part Number Pins Style Tubes Tape & Reel Part Marking RECOMMENDED FOR RAMBUS RIMM 20 QSOP NarrowLAYOUT PACR(PAC AMBUS-1RAM-280) /T PACRAM BUS-1/R PACCONNECTOR RAMBUS-1 I T C E J B E V O ©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 4/00 PACRAMBUS-1 CALIFORNIA MICRO DEVICES QSOP - TOP VIEW POWER DERATING CURVE H E H CAMD 1 D E V MECHANICAL SPECIFICATIONS e Lead Plating Lead Material Lead Coplanarity Substrate Material Body Material Flammability B A C L I T C E A1 J B Tin-Lead Copper Alloy 0.004" (0.102mm) Silicon Molded Epoxy UL94V-0 PACKAGE DIME NSIONS, POWE R DISSIPATION & iNFORMATION Package Pins # A A1 B C D E e H L PD @ 70°C O QSOP 20 mm min 1.35 0.10 0.20 0.18 8.56 3.81 inches m ax 1.75 0.25 0.30 0.25 8.73 3.98 min 0.053 0.004 0.008 0.007 0.337 0.150 6.19 1.27 0.228 0.016 0.64 BSC 5.79 0.40 m ax 0.069 0.010 0.012 0.010 0.344 0.157 0.025 BSC 0.244 0.050 1.00W #/tube #/tape & reel 56 pcs 2,500 pcs © 2000 California Micro Devices Corp. All rights reserved. 4/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 3