sm840001 Micrel Semiconductor, sm840001 Datasheet
sm840001
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sm840001 Summary of contents
Page 1
... General Description The SM840001 synthesizer series were designed for Fibre Channel applications. The device design is optimized for 106.25MHz or 212.5MHz fundamental parallel resonant crystal, with stability and accuracy over the full operating range. The SM840001 includes a unique power reduction methodology, along TM with a patented RotaryWave ...
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... Micrel, Inc. (1) Ordering Information Part Number SM840001KA (2) SM840001KA TR Note: 1. Devices are Green, RoHS-compliant and PFOS-compliant. 2. Tape and Reel. Pin Configuration Pin Description Pin Number Pin Name 1 VDDA XTAL OUT 4 XTAL IN 5 FSEL 6 GND VDD Frequency Select Table FSEL Output (MHz) 0 106 ...
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... Min Typ Max 3.135 3.30 3.465 3.135 3.30 3.465 Min Typ Max 2 V +0 0.3 DD -0.30 0.80 -0.30 0.70 2.6 1.8 0.5 5 -150 150 -5 M9999-031810-B hbwhelp@micrel.com or (408) 955-1690 SM840001 Units Units Units µA µA µA µA ...
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... Min Typ Max Fundamental Parallel Resonant 26.5625 hbwhelp@micrel.com SM840001 Max Units 226.66 MHz 113.33 MHz fs fs 350 Unit dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz dBc/Hz Units MHz Ω ...
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... Xtal. A single 12mA LVCMOS output is provided with tri state capability, controlled via an external pin (OE). The design of the SM840001 consumes very low power in the PLL due to a patented technology in the VCO and the associated dividers. The VCO range is ~3.2GHz to 3 ...
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... Micrel, Inc. Power Supply Filtering The SM840001 provides separate power supply pins to isolate any high switching noise from outputs to internal core blocks. VDD and VDDA should be individually connected to the power plane through vias. Bypass capacitors should be used for each pin. Figure 2 illustrates how the power supply filter for 3 ...
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... Ct2 were optimized to minimize the ppm error. To minimize the board capacitance, a short trace from (Ct2 + Cb2 + Cd2) pin to crystal footprint without vias is desirable preferable to have ground shielding or distance between the crystal traces and noisy signals on the board. 7 SM840001 M9999-031810-B hbwhelp@micrel.com or (408) 955-1690 ...
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... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully March 2010 8-Pin TSSOP (K-8) indemnify Micrel for any damages resulting from such use or sale. © 2010 Micrel, Incorporated. 8 SM840001 M9999-031810-B hbwhelp@micrel.com or (408) 955-1690 ...