IMIFS791
IMIFS791 is Low EMI Spectrum Spread Clock manufactured by Cypress.
Features
- Spread Spectrum Clock Generator (SSCG) with 1x, 2x and 4x outputs
- 80- to 140-MHz operating frequency range
- Modulates external clocks including crystals, crystal oscillators, and ceramic resonators
- Programmable modulation with simple R-C external loop filter (LF)
- Center spread modulation
- 3- 5 Volt power supply
- TTL/CMOS patible outputs
- Low short-term jitter
- Low Power Dissipation;
- 3.3 VDC = 73 m W- typical
- 5.0 VDC = 225 m W- typical
- Available in 8-pin SOIC package .
Applications
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- Desktop/Notebook puters VGA, XGA, and SXGA LCD displays High-speed printers and copiers CD-ROM, VCD, and DVD Embedded systems Networking, LAN/WAN Modems
Benefits
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- Programmable EMI reduction Fast time-to-market Lower cost of pliance No degradation in Rise/Fall time Lower ponent and PCB layer count
Block Diagram
Loop Filter
Pin Configuration
Xin
1 10 p F.
Reference Divider
Xin
Phase Detector
10 p F.
1 2 3 4
8 FS79x 7 6 5
VDD S0 FSOUT VSS
Xout S1 LF
Xout
2 10 p F.
Modulation Control VCO /...
