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ICS1562B Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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ICS1562B Datasheet(HTML) 1 Page - Integrated Circuit Systems |
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1 / 20 page  16-Pin SOIC Integrated Circuit Systems, Inc. ICS1562B Description The ICS1562B is a very high performance monolithic phase- locked loop (PLL) frequency synthesizer. Utilizing ICS’s ad- vanced CMOS mixed-mode technology, the ICS1562B provides a low cost solution for high-end video clock genera- tion. The ICS1562B has differential video clock outputs (CLK+ and CLK-) that are compatible with industry standard video DAC. Another clock output, LOAD, is provided whose frequency is derived from the main clock by a programmable divider. An additional clock output is available, LD/N2, which is derived from the LOAD frequency and whose modulus may also be programmed. Operating frequencies are fully programmable with direct con- trol provided for reference divider, prescaler, feedback divider and post-scaler. Reset of the pipeline delay on Brooktree RAMDAC s may be performed under register control. Outputs may also be set to desired states to facilitate circuit board testing. User Programmable Differential Output Graphics Clock Generator Features • Two programming options: ICS1562B-001 (Parallel Programming) ICS1562B-201 (Serial Programming) • Supports high-resolution graphics - CLK output to 260 MHz, with 400 MHz options available • Eliminates need for multiple ECL output crystal oscillators • Fully programmable synthesizer capability - not just a clock multiplier • Circuitry included for reset of Brooktree RAMDAC pipe- line delay • VRAM shift clock generation capability (-201 option only) • External feedback loop capability (-201 option only) • Compact - 16-pin 0.150” skinny SOIC package • Fully backward compatible to ICS1562 CRYSTAL OSCILLATOR / R PHASE- FREQUENCY DETECTOR CHARGE PUMP LOOP FILTER VCO PRESCALER / A / M MUX MUX / 2 / 4 / N1 MUX DRIVER DIFF. OUTPUT DRIVER / N2 PROGRAMMING INTERFACE CLK+ CLK − LOAD LD/N2 XTAL1 XTAL2 ICS1562B - 001 Pinout ICS1562B - 201 Pinout Simplified Block Diagram - ICS1562B FEEDBACK DIVIDER EXTFBK BLANK (-201 only) Figure 1 1562 B Rev B 10/07/04 RAMDAC is a trademark of Brooktree Corporation. AD0 1 16 AD1 XTAL1 2 15 AD2 XTAL2 3 14 AD3 STROBE 4 13 VDD VSS 5 12 VDDO VSS 6 11 IPRG LOAD 7 10 CLK+ LD/N2 8 9 CLK- 16-Pin SOIC EXTFBK 1 16 DATA XTAL1 2 15 HOLD XTAL2 3 14 BLANK DATCLK 4 13 VDD VSS 5 12 VDDO VSS 6 11 IPRG LOAD 7 10 CLK+ LD/N2 8 9 CLK- |
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