PI6C2301 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Phase-Locked Loop Clock Driver Product Features Product Description • High-Performance Phase-Locked-Loop Clock Distribution for Networking, ATM, 100/134 MHz Registered DIMM Synchronous DRAM modules for server/workstation/PC applications The PI6C2301 features a low-skew, low-jitter, phase-locked loop (PLL) clock driver. By connecting the feedback CLK_OUT output to the feedback FB_IN input, the propagation delay from the CLK_IN input to any clock output will be nearly zero. • Zero Input-to-Output delay • Low jitter: Cycle-to-Cycle jitter ± 100ps max. Application • On-chip series damping resistor at clock output drivers for low noise and EMI reduction If the system designer needs more than 16 outputs with the features just described, using two or more zero-delay buffers such as PI6C2509Q, and PI6C2510Q, is likely to be impractical. The device-to-device skew introduced can significantly reduce the performance. Pericom recommends the use of a zero-delay buffer and an eighteen output non-zero-delay buffer . As shown in Figure 1, this combination produces a zero-delay buffer with all the signal characteristics of the original zero-delay buffer, but with as many outputs as the non-zero-delay buffer part. For example, when combined with an eighteen output non-zero delay buffer, a system designer can create a seventeen-output zero-delay buffer. • Operates at 3.3V VCC • Packaged in Plastic 8-pin SOIC Package (W) • Wide range of Clock Frequencies Notice: This device is subject to import restriction. Please refer to the Import Restriction Notice under the Ordering Information section. Logic Block Diagram Product Pin Configuration CLK_IN CLK_OUT PLL FB_IN CLK_IN 1 AVCC 2 AGND 3 CLK_OUT 4 S 8-Pin W 8 FB_IN 7 VCC 6 GND 5 S Feedback Control Input Reference Clock Signal 18 Output Non-Zero Delay Buffer V Zero Delay CLK_OUT Buffer PI6C2301 17 S Output Source PLL Shutdown 1 PLL N 0 CLK_IN Y Figure 1. This Combination Provides Zero-Delay Between the Reference Clocks Signal and 17 Outputs 1 PS8419A 12/07/01 PI6C2301 Phase-Locked Loop Clock Driver 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Pin Functions Pin Name Pin Numbe r Type De s cription CLK_IN 1 I AVCC 2 Power Analog power supply. AGND 3 Ground Analog ground. CLK_OUT 4 O Clock outputs. The output provides low- skew copies of CLK_IN and has an embedded series- damping resistor. S 5 I Control Input S. S is used to bypass the PLL for test purposes. When S is strapped to ground, PLL is bypassed and CLK_IN is buffered directly to the device outputs. GND 6 Ground Ground. VCC 7 Power Power supply. FB_IN 8 I Reference Clock input. CLK_IN allows spread spectrum clock input. Feedback input. FBIN provides the feedback signal to the internal PLL. DC Specifications (Absolute maximum ratings over operating free-air temperature range) Symbol Parame te r VI Input voltage range VO Output voltage range M in. -0.5 M ax. VCC + 0.5 Units V VI_DC DC input voltage +5.0 IO _DC DC output current 100 mA Power Maximum power dissipation at TA= 55oC in still air 1.0 W TSTG Storage temperature 150 oC - 65 Note: Stress beyond those listed under absolute maximum ratings may cause permanent damage to the device. Parame te r Te s t Conditions VCC ICC VI = VCC or GND; IO = 0(1) 3.6V CI VI = VCC or GND CO VO = VCC or GND M in. Typ. 4 3.3V 6 M ax. Units 10 mA pF Note: 1. Continuous output current 2 PS8419A 12/07/01 PI6C2301 Phase-Locked Loop Clock Driver 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Recommended Operating Conditions Symbol Parame te r M in. M ax. 3.6 VC C Supply voltage 3.0 VIH High level input voltage 2.0 VIL Low level input voltage VI Input voltage 0 VC C TA O perating free- air temperature 0 70 Units V 0.8 ºC Electrical Characteristics (Over recommended operating free-air temperature range Pull Up/Down Currents, VCC = 3.0V) Symbol Parame te r Condition Pull- up current IO H Pull- down current IO L M in. M ax. VO U T = 2.4V -18 VO U T = 2.0V -30 VO U T = 0.8V 25 VO U T = 0.55V 17 Units mA AC Specifications Timing Requirements (Over recommended ranges of supply voltage and operating free-air temperature) Symbol Parame te r M in. M ax. Units FCLOCK Clock frequency 25 134 MHz DCYI Input clock duty cycle 40 60 % 1 ms Stabilization Time after power up Switching Characteristics (Over recommended ranges of supply voltage and operating free-air temperature, CL=30pF) VCC = 3.3V ± 0.3V, 0-70 °C Parame te r From To M in. tphase error without jitter CLK_IN at 100 MHz and 66 MHz FB_IN 150 Typ. M ax. Units +150 ps Jitter, cycle- to- cycle At 100 MHz and 66 MHz CLK_OUT Duty cycle tr, rise- time, 0.4V to 2.0V CLK_OUT tf, fall- time, 2.0V to 0.4V 100 +100 45 55 1.0 1.1 % ns Note: These switching parameters are guaranteed by design. 3 PS8419A 12/07/01 PI6C2301 Phase-Locked Loop Clock Driver 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Package Mechanical Information Plastic 8-pin SOIC Package 8 .149 3.78 .157 3.99 .0099 0.25 x 45˚ .0196 0.50 1 .0075 .0098 0-8˚ .189 4.80 .196 5.00 .016 .026 0.406 0.660 0.19 0.25 0.40 .016 1.27 .050 .2284 .2440 5.80 6.20 .053 1.35 .068 1.75 SEATING PLANE REF .050 BSC 1.27 .0040 0.10 .0098 0.25 .013 0.330 .020 0.508 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Ordering Information Orde ring Code Package Name Package Type Ope rating Range PI6C2301W W8 8- pin 150- mil SO IC Commercial Import Restriction Notice: Due to an agreement to settle a patent dispute, this device is only available for sale outside of the US and may not be subsequently re-imported into the US as an individual component or as incorporated into equipment. Any sale is expressly conditioned on the customer's agreement not to export the device or any product or equipment containing the device to the United States. Pericom disclaims any liability for indemnity or other obligation or warranty if the devices or any product or equipment containing the devices are imported in violation of this agreement. Pericom Semiconductor Corporation 2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com 4 PS8419A 12/07/01