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| CALIFORNIA MICRO DEVICES PACR4G High Performance Bus Termination Network Features * Designed especially for High Performance computers/servers * Provides high speed bus termination * Reduces ground bounce with ground pin placement / Ultra low crosstalk * Terminates 20 lines in a QSOP package Applications * High Performance servers * High Performance desk top systems * GTL, NTL, ECL terminator Product Description High speed microprocessors demand unique, high speed bus termination. The PACR4G Termination Network provides 20 terminations per package and meets the requirements for high speed terminations. 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 as any 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 industry standard packaging is easy to handle in manufacturing and yields a high reliability similar to other semiconductor components. S TA N D A R D S P E C I F I C AT I O N S Absolute Tolerance (R) Operating Temperature Range Power Rating/Resistor Storage Temperature Package Power Rating Crosstalk 1% 0C to 70C 100mW -65C to 150C 1.00w, Max <2% typical R 24 23 R SCHEMATIC CONFIGURATION 22 R 21 20 19 R R 18 17 16 15 R R R 14 R 13 R R R R R R R R R R R S TA N D A R D VA L U E S R (W) 47 50 56 68 90 Code 470 500 560 680 900 1 2 3 4 5 6 7 8 9 10 11 12 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 R Code 470 500 560 680 900 Pins 24 24 24 24 24 Style QSOP QSOP QSOP QSOP QSOP Ordering Part Number Tubes PAC470R4GQ/T PAC500R4GQ/T PAC560R4GQ/T PAC680R4GQ/T PAC680R4GQ/T Tape & Reel PAC470R4GQ/R PAC500R4GQ/R PAC560R4GQ/R PAC680R4GQ/R PAC680R4GQ/R Part Marking PAC470R4GQ PAC500R4GQ PAC560R4GQ PAC680R4GQ PAC680R4GQ C0970500 (c) 2000 California Micro Devices Corp. All rights reserved. 7/18/2000 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1 CALIFORNIA MICRO DEVICES Signal at Termination and Victim Line (TA = 25OC) (See Test Circuit) PACR4G 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.) Measurements made using Tektronix TDS820 6 GHz Digitizing Oscilloscope with P6207 FET Probes. 15mV Cha 500mV/De 15mV Cha 250mV/De Test Circuit Block Diagram (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 7/18/2000 CALIFORNIA MICRO DEVICES Test Circuit TP1 TP1 PB1 GND JP1 1 2 3 4 5 6 7 8 POWER PACR4G GND VCC_5 GND VCC_3 GND VCC_1.5 GND GND VCC_3 W1 SMA PULSE_GEN 2 4 6 8 11 13 15 17 U2 1A1 1A2 1A3 1A4 2A1 2A2 2A3 2A4 1G 2G 74FCT244 GND VCC_5 VCC_1.5 BUFFER1 GND GND RIN1 100 RIN2 100 GND 1Y1 1Y2 1Y3 1Y4 2Y1 2Y2 2Y3 2Y4 18 16 14 12 9 7 5 3 BUFFER1 GATE1 GATE2 GATE3 GATE4 1 19 TP4 PB4 TP4 GND GND VCC_5 C17 GND U1 VCC_5 VCC_1.5 C8 0.1uF 1 2 3 5 6 7 8 9 10 12 13 14 15 16 17 19 20 21 22 23 24 0.1uF /CEAB CLKAB B1 B2 B3 B4 B5 B6 GND GND GND /OEAB LEAB A1 A2 A3 VCC_3 A4 A5 A6 56 55 54 52 51 49 48 47 45 44 43 42 41 40 38 37 36 35 34 33 GTL1 GTL2 GTL3 GND VCC_1.5 R3 1K GND R1 VCC_3 GATE1 VREF 56 GND R4 2K GND C9 0.1uF GATE2 C24 1000pF C25 0.1uF GATE3 A7 A8 A9 A10 A11 A12 A13 A14 A15 VCC_3 A16 A17 CLKIN /OEBA LEBA B7 B8 B9 B10 B11 B12 B13 B14 B15 VREF B16 B17 CLKOUT CLKBA /CEBA GTL4 GTL5 GTL6 GTL7 GTL8 GTL9 GTL10 GTL11 GTL_TEST VREF VICTIM C15 1000pF C16 0.1uF GND GND GATE4 GND VCC_3 VCC_3 GND C10 0.1uF GND 26 27 28 31 30 29 C13 1000pF C14 0.1uF VCC_5 GND C11 0.1uF 74GTL16616 VCC_5 GND GND GND GND C12 0.1uF 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 1 2 3 4 5 6 7 8 9 10 11 12 R R G R R R G R R G R R PRN331B 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 GTL9 GTL8 GTL8 VTT GTL7 GTL6 VCC_1.5 C20 1000pF C21 0.1uF TP3 PB3 GND C22 1000pF C23 0.1uF TP3 GND GND (c) 2000 California Micro Devices Corp. All rights reserved. 7/18/2000 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 3 |
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