ASM2I9940LG-32LT

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ASM2I9940LG-32LT, is a clock/timing product integrated into a 4x4mm 24-lead LLP package. It is a high-performance, low-power fanout buffer, providing low jitter and power-saving features. It is capable of generating up to four low-skew outputs from a single crystal oscillator or a differential clock input.

Application field

The ASM2I9940LG-32LT is designed for applications requiring a low-skew, low-jitter clock source. As a fanout buffer, it can be used to reduce propagation delay and increase system throughput. It is perfectly suited for processor clock, memory clock or system level sources and can provide clock buffer solutions for FPGAs, DSPs, ASICs and other ICs. This buffer is also suitable for clock synchronization and clock distribution designs, as well as clock translation, remote control and signal reshaping.

Working Principle

The ASM2I9940LG-32LT is a high-performance, clock buffer device offering up to four selectable outputs. It has a differential input pair accepting a signal from a crystal oscillator, LVDS or other low-skew signal and a strobe signal input. The outputs provide clock harmonics and skew performance that is independent of the load and temperature, in order to maintain signal integrity at the outputs.

The device has an integrated auto-calibration circuit that reduces the clock skew across all four outputs to less than 1ps. It also has a very low operating current of 1.1mA and a low power consumption of 0.7W. This makes it ideal for applications requiring a low power, low-voltage, clock buffer solution.

The device supports clock speeds from 16MHz up to 800MHz, and operates at supply voltages of 3.3V. The outputs can be programmed to support a wide range of output formats and high-speed interfaces, including LVCMOS, LVDS, HCSL and CML.

In addition to the auto-calibration and low-skew features, the ASM2I9940LG-32LT includes a wide range of features that can help reduce system costs, such as adjustable output slew rates, programmable output drive strengths, and a wide selection of spread spectrum parameters.

The product also features an integrated output glitch filter and a programmable output disable function, allowing designers to easily turn off certain output clocks in power-saving or noise-sensitive designs. The integrated spread spectrum algorithm allows designers to reduce EMI and RFI emissions to ensure product compliance with FCC and CE regulations.

Conclusion

In conclusion, the ASM2I9940LG-32LT is an ideal low-skew, low-jitter clock buffer for applications that require multiple clock sources with low power consumption and excellent signal integrity. With its integrated auto-calibration, low power consumption, adjustable output slew rates and wide variety of output formats and high-speed interfaces, the ASM2I9940LG-32LT is an ideal clock buffer solution.

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