PAC R6G CALIFORNIA MICRO DEVICES P/ACTIVE 1% TOLERANCE BUS TERMINATION NETWORK TM Features Highly integrated bus termination network 1% absolute tolerance terminations Ultra-low crosstalk 18 terminating lines in QSOP package Saves board space and improves system reliability Reduces assembly cost and rework Applications Pentium(R) Pro servers & desktop systems Engineering workstations Embedded processor systems GTL, ECL, NTL, HSTL terminator Product Description High speed microprocessors like Intels Pentium(R) Pro Processor, demand unique, high speed bus termination schemes. The PAC R6G series network provides 18 terminations per package. Four termination resistor values are available. The 47, 50 and 56 ohm terminations are suitable for use with the Intel server chip set and the 68 ohm termination is suitable for use with the Intel desktop chip set. The tight resistor tolerance minimizes noise contribution from termination mismatching. The PAC R6G network offers high performance, high reliability, and low cost through manufacturing efficiency. It meets or exceeds all Intel specifications for termination performance and provides an additional degree of system noise margin. The termination resistor elements are fabricated using state-of-the-art thin film manufacturing. This highly integrated solution is silicon-based and has the same reliability characteristics as any of todays microprocessor products. The thin film resistors have excellent stability over temperature, over applied voltage, and over product life. In addition, the QSOP industry standard packaging is easy to handle in manufacturing and provides interconnect reliability on par with other common semiconductor components and far better than traditional thick film-based chip products. SCHEMATIC CONFIGURATION STANDARD SPECIFICATIONS Absolute Tolerance (0 C to 70 C) Operating Temperature Range Power Rating/Resistor Max Package Power Rating (70OC) Crosstalk (See Test Circuit) O O 1% 0OC to 70OC 100mW 1.00W, max. 18 mV (typical) STANDARD VALUES R() Code 47 470 50 500 56 560 68 680 R Code 470(1%) 500(1%) 560(1%) 680(1%) 24 23 22 21 20 19 18 17 16 15 14 13 R R R R R R R R 1 2 3 4 R R 5 6 7 STANDARD PART ORDERING INFORMATION Package Ordering Part Number Pins Style Tubes Tape & Reel 24 QSOP PAC470FR6GQ/T PAC470FR6GQ/R 24 QSOP PAC500FR6GQ/T PAC500FR6GQ/R 24 QSOP PAC560FR6GQ/T PAC560FR6GQ/R 24 QSOP PAC680FR6GQ/T PAC680FR6GQ/R R R R R R R R R 8 9 10 11 12 Part Marking PAC470FR6GQ PAC500FR6GQ PAC560FR6GQ PAC680FR6GQ (c) 1996 CMD Corp. All rights reserved. P/Active is a trademark of California Micro Devices Corp. Covered by one or more of U.S. Pat. Nos. 5,355,014, 5,370,766, and 5,514,612 and other pending applications. Pentium Pro is a registered trademark of Intel. 10/97 Rev. 2 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 C0130597D Fax: (408) 263-7846 1 PAC R6G CALIFORNIA MICRO DEVICES Signal at Termination and Victim Line (TA = 25OC) (See Test Circuit) Channel 1 (500mV/division) Termination Signal, Channel 2 (50mV/division) Victim Voltage. The victim voltage crosstalk measures 35mV in the critical areas around the system clock. The system clock occurs approximately 4ns before each data transition. The horizontal dashed lines are 35mV apart. The time scale is 5.0ns/division. (The signal voltage rise and fall times have been adjusted at the driver to conform to Intel specifications.) Channel 1 Channel 2 :35mV Measurements made using Tektronix TDS820 6 GHz Digitizing Oscilloscope with P6207 FET Probes. Test Circuit Block Diagram PAC R6G 2 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 Rev. 2 10/97 PAC R6G CALIFORNIA MICRO DEVICES Test Circuit TP1 TP1 PB1 GND JP1 1 2 3 4 5 6 7 8 GND VCC_5 GND VCC_3 GND VCC_1.5 GND GND W1 SMA VCC_3 U2 2 4 6 8 11 13 15 17 PULSE_GEN VCC_5 VCC_1.5 BUFFER1 RIN1 100 GND POWER RIN2 100 GND GND 1A1 1A2 1A3 1A4 2A1 2A2 2A3 2A4 1 19 18 16 14 12 9 7 5 3 1Y1 1Y2 1Y3 1Y4 2Y1 2Y2 2Y3 2Y4 BUFFER1 GATE1 GATE2 GATE3 GATE4 1G 2G TP4 PB4 74FCT244 TP4 GND GND GND VCC_5 C17 GND U1 VCC_5 VCC_1.5 VCC_3 GATE1 VREF GND C9 0.1uF R4 2K C25 0.1uF GATE3 GND GND VCC_3 VCC_3 GND C10 0.1uF 26 27 28 GND VCC_1.5 B7 B8 B9 B10 B11 B12 B13 B14 B15 VREF B16 B17 CLKIN /OEBA LEBA GND R1 B4 B5 B6 A13 A14 A15 VCC_3 A16 A17 GND 52 51 B2 B3 A7 A8 A9 A10 A11 A12 19 20 21 22 23 24 GATE4 GND 56 55 54 /CEAB CLKAB B1 A2 A3 VCC_3 A4 A5 A6 12 13 14 15 16 17 GATE2 0.1uF /OEAB LEAB A1 5 6 7 8 9 10 GND GND C8 0.1uF R3 1K C24 1000pF 1 2 3 GND 49 48 47 GTL1 GTL2 GTL3 45 44 43 42 41 40 GTL4 GTL5 GTL6 GTL7 GTL8 GTL9 38 37 36 35 34 33 GTL10 GTL11 GTL_TEST VREF VICTIM 56 C15 1000pF GND 31 30 29 CLKOUT CLKBA /CEBA C16 0.1uF C13 1000pF C14 0.1uF 74GTL16616 VCC_5 GND C11 0.1uF VCC_5 GND GND GND C12 0.1uF GND GND TP5 PB5 VICTIM VCC_1.5 GND U3 R2 GTL1 VTT GTL2 GTL3 GTL3 VTT GTL4 GTL4 VTT GTL2 GTL6 56 C18 1000pF C19 0.1uF GND C20 1000pF 1 2 3 4 5 6 7 8 9 10 11 12 R R G R R R G R R G R R C21 0.1uF R R G R R G R R R G R R 24 23 22 21 20 19 18 17 16 15 14 13 GTL11 GTL11 VTT GTL7 GTL9 VTT PRN331B TP3 PB3 GND VCC_1.5 GTL9 GTL8 GTL8 VTT GTL7 GTL6 C22 1000pF C23 0.1uF TP3 GND GND 10/97 Rev. 2 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 3