First 100 MHz, HCSL-output crystal oscillator for PCI Express
Maxim Integrated Products’ DS4100H is a 100 MHz, HCSL-output crystal oscillator (XO) for PCI Express(R) applications. According to Maxim, it is the industry's first XO to provide a high-speed, current-steering logic (HCSL) output. And it eliminates the need to translate from CMOS, LVDS, or LVPECL formats to HCSL. Manufactured using fundamental AT-cut crystal technology, it integrates a low-noise, PLL-based oscillator designed using Maxim's proprietary SiGe process. The DS4100H is 55% smaller than SAW-based or third-overtone designs, making it suitable for space-constrained, PCI Express applications.
Available in a small, 5 mm x 3.2 mm package, the DS4100H is highly competitive against SAW-based oscillator designs, which are manufactured in a larger, 5 mm x 7 mm ceramic package and are not offered with an HCSL output, Maxim said. It provides jitter performance of less than 1 ps (RMS), 12 kHz to 20 MHz over the -40 °C to +85 °C extended temperature range, while delivering much higher frequency stability (±39 ppm versus ±100 ppm or greater) than SAW-based devices. Additionally, this XO provides extremely low, ±7 ppm aging over 10 years, whereas SAW-based oscillators typically provide ±1 ppm aging per year.
The DS4100H also outperforms third-overtone designs, which require additional components in order to translate from other output formats to HCSL. Integrating a robust, LC-PLL circuit that uses a fundamental AT-cut crystal, this XO eliminates the spurious modes of operation typically found in third-overtone designs.
The DS4100H comes in a 10-pin LCCC surface-mount ceramic package. Prices start at $6.50 (1000-up, FOB USA).
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