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ASM5I2304B-1-08-ST Datasheet(PDF) 1 Page - Alliance Semiconductor Corporation |
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ASM5I2304B-1-08-ST Datasheet(HTML) 1 Page - Alliance Semiconductor Corporation |
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1 / 13 page  September 2005 ASM5P2304B rev 0.5 Alliance Semiconductor 2575 Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com Notice: The information in this document is subject to change without notice. 3.3V Zero Delay Buffer Features Zero input - output propagation delay, adjustable by capacitive load on FBK input. Multiple configurations - Refer “ASM5P2304B Configurations Table”. Input frequency range: 4MHz to 20MHz Multiple low-skew outputs. Output-output skew less than 200pS. Device-device skew less than 500pS. Two banks of four outputs. Less than 200pS Cycle-to-Cycle jitter (-1, -1H, -2, -2H). Available in space saving, 8-pin 150 mil SOIC Package. 3.3V operation. Advanced 0.35µ CMOS technology. Industrial temperature available . Functional Description ASM5P2304B is a versatile, 3.3V zero-delay buffer designed to distribute high-speed clocks in PC, workstation, datacom, telecom and other high-performance applications. It is available in an 8 pin package. The part has an on-chip PLL, which locks to an input clock, presented on the REF pin. The PLL feedback is required to be driven to FBK pin, and can be obtained from one of the outputs. The input-to-output propagation delay is guaranteed to be less than 250pS, and the output-to-output skew is guaranteed to be less than 200pS. The ASM5P2304B has two banks of two outputs each. Multiple ASM5P2304B devices can accept the same input clock and distribute it. In this case the skew between the outputs of the two devices is guaranteed to be less than 500pS. The ASM5P2304B is available in two different configurations (Refer “ASM5P2304B Configurations Table). The ASM5P2304B-1 is the base part, where the output frequencies equal the reference if there is no counter in the feedback path. The ASM5P2304B-1H is the high-drive version of the -1 and the rise and fall times on this device are much faster. The ASM5P2304B-2 allows the user to obtain REF and 1/2X or 2X frequencies on each output bank. The exact configuration and output frequencies depend on which output drives the feedback pin. Block Diagram /2 PLL CLKA1 FBK CLKA2 CLKB1 CLKB2 REF Extra Divider (-2) |
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