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ICS307-03

Part Number	ICS307-03
Manufacturer	Integrated Circuit Systems
Description	SERIALLY PROGRAMMABLE CLOCK SOURCE
Published	Feb 26, 2015
Detailed Description	ICS307-03 SERIALLY PROGRAMMABLE CLOCK SOURCE Description The ICS307-03 is a dynamic, serially programmable clock source...
Datasheet	ICS307-03 PDF File

Overview

ICS307-03 SERIALLY PROGRAMMABLE CLOCK SOURCE Description The ICS307-03 is a dynamic, serially programmable clock source which is flexible and takes up minimal board space.
Output frequencies are programmed via a 3-wire SPI port.
An advanced PLL coupled to an array of configurable output dividers and three outputs allows low-jitter generation of frequencies from 200 Hz to 270 MHz.
The device can be reprogrammed during operation, making it ideal for applications where many different frequencies are required, or where the output frequency must be determined at run time.
Glitch-free frequency transitions, where the clock period changes slightly over many cycles, are possible.
Features • Crystal or clock reference input • 3.
3 V CMOS outputs • Three outputs can be individually configured or shut off • Small 16-pin TSSOP package • Reprogrammable during operation • 3-wire SPI serial interface • Glitch-free output frequency switching • User selectable charge pump current and damping resistor • Power-down control via hardware pin or software control bit • Programming word can be generated by ICS VersaClock II Software • Directly programmable via VersaClock II Software and a Windows PC parallel port • Available in Pb (lead) free package Block Diagram (Table 1) X1 REF Divide 1-2055 [Bit 122] X2 Charge Pump (Table 3) CP 11pF Resistor (Table 4) 300 pF VCO DIVIDE 12-2055 (Table 2) DIN CS SCLK Programming Register (132 bits) Divider 2 - 8232 (Table 5) [Bit 110] CLK1 1 0 [Bit 123] Divider 2 - 34 (Table 6) [Bit 111] CLK2 1 0 [Bit 124] Divider 2 - 34 (Table 7) [Bit 129] CLK3 MDS 307-03 C 1 Revision 101705 Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.
icst.
com ICS307-03 SERIALLY PROGRAMMABLE CLOCK SOURCE Pin Assignment X1 VDD VDD VDD GND GND GND CLK1 ICS307-03 1 16 2 15 3 14 4 13 5 12 6 11 7 10 89 16-pin TSSOP X2 PD CLK3 GND CLK2 DIN CS SCLK Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 P...

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