PI6C2302 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Phase-Locked Loop Clock Driver Product Features Product Description • 2X CLK_IN on CLK_OUT The PI6C2302 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. The PI6C2302 provides 2X CLK_IN on CLK_OUT output. • High-Performance Phase-Locked-Loop Clock Distribution for Networking, ATM, 100/134 MHz Registered DIMM Synchronous DRAM modules for server/workstation/ PC applications • Zero Input-to-Output delay Application • Low jitter: Cycle-to-Cycle jitter ±100ps max. 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 deviceto-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. • On-chip series damping resistor at clock output drivers for low noise and EMI reduction • Operates at 3.3V VCC • Wide range of Clock Frequencies • Package: Plastic 8-pin SOIC Package (W) Product Pin Configuration Logic Block Diagram CLK_IN 1 AVCC 2 AGND 3 CLK_OUT 4 CLK_OUT PLL ÷2 FB_IN CLK_IN S 8-Pin W 8 FB_IN 7 VCC 6 GND 5 S Control Input Feedback Buffer PI6C2302 Reference CLK_OUT Output Source PLL Shutdown 1 PLL N 0 CLK_IN Y Non-Zero V Zero Delay 18 Output S Delay Buffer 17 Clock Signal Figure 1. This Combination Provides Zero-Delay Between the Reference Clocks Signal and 17 Outputs 1 PS8418B 05/21/01 PI6C2302 Phase-Locked Loop Clock Driver 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Pin Functions Pin Name Pin Numbe r Type D e s cription CLK _IN 1 I AVCC 2 Power Analog power. AGND 3 Ground Analog ground. CLK _O UT 4 O Clock output. 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. FB_IN provides the feedback signal to the internal PLL. Absolute Maximum Ratings (Over operating free-air temperature range, see Note 1) Symbol Parame te r M in. M ax. Units VI Input voltage range 0.5 VCC + 0.5 VO Output voltage range 0.5 VCC + 0.5 VI_DC DC input voltage 0.5 +5.0 IO_DC DC output current o Power Maximum power dissipation at TA= 55 C in still air TSTG Storage temperature 65 V 100 mA 1.0 W 150 o C Note: 1. Stress beyond those listed under absolute maximum ratings may cause permanent damage to the device. Recommended Operating Conditions Symbol VCC Parame te r Supply voltage Commercial Supply voltage Industrial VIH High level input voltage VIL Low level input voltage VI Input voltage TA Te mpe rature M in. M ax. 3.0 3.6 3.135 3.465 Units 2.0 V 0.8 O perating free- air temperature Commercial O perating free- air temperature Industrial 2 0 VCC 0 70 40 85 ºC PS8418B 05/21/01 PI6C2302 Phase-Locked Loop Clock Driver 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Electrical Characteristics (Over recommended operating free-air temperature range) Symbol ICC Te s t Condition VI = VCC or GND; IO = 0(2) VI = VCC or GND; IO = CI VI = VCC or GND CO VO = VCC or GND IOH IOL Te mpe rature 0(2) VCC Commercial Industrial M in. Typ. M ax. 3.6V 10 3.465V 10 µA 4 3.3V pF 6 VOUT = 2.4V 18 VOUT = 2.0V 30 VOUT = 0.8V 25 VOUT = 0.55V 17 Units mA Note: 2. Continuous Output Current AC Specifications Timing Requirements (Over recommended ranges of supply voltage and operating free-air temperature, CL = 25pF) Symbol FCLOCK DCYI Parame te r Te s t Condition M in. Typ. M ax. Units Clock frequency Commercial 25 134 Clock frequency Industrial 25 100 40 60 % 1 ms Input clock duty cycle Stabilization time after power up tp Phase error without jitter(3) CLK _IN↑ at 100MHz and 66MHz 150 +150 tj Jitter, cycle- to- cycle At 100MHz and 66MHz 100 +100 45 55 Duty cycle tr Rise- time, 0.4V to 2.0V 1.0 tf Fall- time, 2.0V to 0.4V 1.1 MHz ps % ns Note: 3. This switching parameter is guaranteed by design. 3 PS8418B 05/21/01 PI6C2302 Phase-Locked Loop Clock Driver 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 8-pin Plastic SOIC (W) Package 8 .149 .157 3.78 3.99 .0099 .0196 1 .189 .196 .016 .026 0.406 0.660 0.25 x 45˚ 0.50 .0075 .0098 0-8˚ 4.80 5.00 0.19 0.25 0.40 .016 1.27 .050 .053 .068 1.35 1.75 SEATING PLANE REF .050 BSC 1.27 .2284 .2440 5.80 6.20 .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 PI6C2302W W8 8- pin 150- mil SOIC Commercial PI6C2302- WI W8 8- pin 150- mil SOIC Industrial Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 4 PS8418B 05/21/01