PACTFSERIES CALIFORNIA MICRO DEVICES P/ACTIVE(R) CLOCK TERMINATION AND FILTER Features 8 Channels in Miniature QSOP Package Frequency Response to greater than 3 GHz Low In-Band Insertion Loss Maintains Signal Integrity Low Distortion, Low Cross Talk ESD Protected Pin Assignments Applications High speed microprocessor clock termination Product Description High speed microprocessor systems require well controlled, precise, fast edge-rate clock signals. Clock lines behave as transmission lines for fast-edge signals and therefore the lines may exhibit transients caused by reflections and switching noise. The PACTF clock filter reduces reflections and slows down edges to help reduce EMI/RFI radiation. California Micro Devices P/Active Tapped Filter is an integrated thin film resistor-capacitor network designed to filter clock lines and suppress EMI/RFI noise in personal computers and peripherals, workstations, Local Area Network (LAN), Asynchronous Transfer Mode (ATM), and Wide Area Network (WAN). The filter includes ESD protection circuitry which prevents device destruction when subjected to ESD discharges less than 2KV. The ESD protection circuitry permits the filter to operate on bipolar signals of up to 6V. California Micro Devices PAC TF is housed in a surface mount package suitable for bottom side mounting to the board. This integrated network solution minimizes space and routing problems and improves reliability and yields. SCHEMATIC CONFIGURATION STANDARD SPECIFICATIONS Absolute Tolerance (R) Absolute Tolerance (C) Operating Temperature Range Power Rating/Resistor Leakage Current Crosstalk (see Text Circuit) ESD Clamp Positive Clamp Negative Clamp ESD Protection* Storage Temperature Package Power Rating 10% 20% 0C to 70C 100mW 1 A @ 25C max. < 5% (typical) > 6 Volts < -6 Volts 2KV min. -60C to 150C 1.00W, max. 24 23 22 21 20 19 18 17 16 15 1 2 4 6 3 5 7 8 9 14 13 10 11 12 * ESD Protection level guaranteed by design. C0380798 (c) 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 PACTFSERIES CALIFORNIA MICRO DEVICES R() 22 22 33 33 STANDARD VALUES C(pf) RC Code fc @ 3db 10 15 10 15 220/100T 220/150T 330/100T 330/150T 723 48 2 48 2 322 MHz MHz MHz MHz with 0 source impedance RC Code 220/100T 220/150T 330/100T 330/150T STANDARD PART ORDE RING INFORMATION Package Ordering Part Number Pins Style* Tubes Tape & Reel 24 24 24 24 QSOP QSOP QSOP QSOP PAC220/100TFQ/T PAC220/150TFQ/T PAC330/100TFQ/T PAC330/150TFQ/T PAC220/100TFQ/R PAC220/150TFQ/R PAC330/100TFQ/R PAC330/150TFQ/R Part Marking PAC220/100TFQ PAC220/150TFQ PAC330/100TFQ PAC330/150TFQ Filter Cross Talk Test Circuit (TA=25oC) 50 Ohm Pulse Generator 5 volt, 10 MHz, > 1 nS Rise / Fall Time V V = Victim Voltage 50 (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 4/00 PACTFSERIES CALIFORNIA MICRO DEVICES Filter Insertion Loss (S12, dB), Typical (TA = 25C) Representative Sample ATTENUATION CURVES 22 Filter 33 Filter 0 -2 -4 C = 15pF -5 C = 10pF C = 15pF -8 C = 10pF -10 -10 -12 -15 -14 10 MHz 100 MHz 1 GHz 10 MHz 100 MHz 1 GHz S parameters are measured using a Hewlett Packard HP8753C Network Analyzer with a HP85047A S-parameter Test Set. Application Information The PACTF-2 is designed to minimize the EMI/RFI noise from the clock signals on PC motherboards. In order to get the best results, the PACTF should be located as close as possible to the clock generator chips, such as Cypress CY2030 (used for peripherals) and CY2275 (used for CPU, AGP, PCI, and SDRAM). 13 14 12 15 10 16 9 11 17 8 18 7 19 6 20 21 5 22 3 23 2 24 1 4 (c) 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