ZL30254
2-Input, 2-Output 8kHz/25MHz Clock Multiplier and Jitter Attenuator
Overview
The ZL30254 is a high-performance, cost efficient, precision clock multiplier optimized for Ethernet applications that demand low-jitter clock generation. The ZL30254 accepts two input reference clocks both 8kHz or 25MHz and performs clock multiplication with jitter attenuation producing 125MHz or 156.25MHz locked output clocks. 
Applications/Uses
-
Jitter attenuation, reference selection from dual 8kHz or 25MHz inputs, frequency multiplication to 125MHz or 156.25MHz
Key Features
- Two Input Clocks
- Two CMOS inputs, both 8kHz or 25MHz
- Inputs continually monitored for frequency accuracy
- Automatic revertive reference switching
- Low-Bandwidth DPLL
- 25Hz bandwidth for jitter attenuation
- +/- 20ppm tracking range
- Digital hold on loss of all inputs
- Clock Multiplier APLL and Output Clocks
- Easy to configure, encapsulated design requires no external VCXO or loop filter components
- Two CML outputs, both 125MHz or 156.25MHz
- Outputs easily interface with CML, LVDS or LVPECL components
- Output jitter <1 ps RMS (12kHz - 20MHz)
General Features
- Operates from low-cost 49.125MHz fundamental-mode crystal
- Status output pins indicate selected input clock, holdover, and locked/unlocked states
- Input clock selection control pin
- Tiny 5x5mm QFN package
Resources
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Ordering
QFN-32(5x5) Clock Generators / Frequency Synthesizers / PLL ROHS
| Distributor | SKU | Stock | MOQ | Pkg | |
|---|---|---|---|---|---|
| Microchip Technology Inc. | .. | .. | .. | .. | Buy Now |
| Digi-Key | ZL30254LDF1-ND | 4000 | Tape & Reel | No Stock |
QFN-32(5x5) Clock Generators / Frequency Synthesizers / PLL ROHS
| Distributor | SKU | Stock | MOQ | Pkg | |
|---|---|---|---|---|---|
| Microchip Technology Inc. | .. | .. | .. | .. | Buy Now |
| Digi-Key | ZL30254LDG1-ND | 490 | Tray | No Stock |
