PACR4G CALIFORNIA MICRO DEVICES High Performance Bus Termination Network Features Applications * Designed especially for High Performance computers/servers * High Performance servers * Provides high speed bus termination * GTL, NTL, ECL terminator * High Performance desk top systems * Reduces ground bounce with ground pin placement / Ultra low crosstalk * Terminates 20 lines in a QSOP package 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. SCHEMATIC CONFIGURATION S TA N D A R D S P E C I F I C AT I O N S Absolute Tolerance (R) 1% Operating Temperature Range 0C to 70C Power Rating/Resistor 100mW Storage Temperature -65C to 150C Package Power Rating 1.00w, Max Crosstalk <2% typical 24 23 S TA N D A R D VA L U E S R (W) Code 47 470 50 500 56 560 68 680 90 900 22 21 20 19 18 17 16 15 14 13 R R R R R R R R R R R R R R R R R R R R 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 Ordering Part Number R Code Pins Style Tubes Tape & Reel Part Marking 470 24 QSOP PAC470R4GQ/T PAC470R4GQ/R PAC470R4GQ 500 24 QSOP PAC500R4GQ/T PAC500R4GQ/R PAC500R4GQ 560 24 QSOP PAC560R4GQ/T PAC560R4GQ/R PAC560R4GQ 680 24 QSOP PAC680R4GQ/T PAC680R4GQ/R PAC680R4GQ 900 24 QSOP PAC680R4GQ/T PAC680R4GQ/R 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 PACR4G 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.) Measurements made using Tektronix TDS820 6 GHz Digitizing Oscilloscope with P6207 FET Probes. 15mV 15mV Cha 500mV/De 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 PACR4G 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 GND 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 GND R1 B7 B8 B9 B10 B11 B12 B13 B14 B15 VREF B16 B17 CLKIN /OEBA LEBA VCC_5 VCC_1.5 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 A2 A3 VCC_3 A4 A5 A6 12 13 14 15 16 17 GATE2 0.1uF 56 55 54 /CEAB CLKAB B1 /OEAB LEAB A1 5 6 7 8 9 10 GND GND C8 0.1uF R3 1K C24 1000pF 1 2 3 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 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 (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