840004AGLFT

Series:	FemtoClock®
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Frequency Synthesizer
PLL:	Yes with Bypass
Input:	LVCMOS, LVTTL, Crystal
Output:	LVCMOS, LVTTL
Number of Circuits:	1
Ratio - Input:Output:	2:4
Differential - Input:Output:	No/No
Frequency - Max:	226.66MHz
Divider/Multiplier:	Yes/No
Voltage - Supply:	3.135 V ~ 3.465 V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-TSSOP
Base Part Number:	ICS840004

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Introduction to 840004AGLFT

The 840004AGLFT is an integrated frequency synthesizer that sets the standard for applications in the Clock/Timing market. It is a programmable device that comprises of a phase-locked loop (PLL) and fast settling digital frequency synthesizer. It is a highly dependable and cost effective solution that provides low power dissipation, small size, and ultra low noise (±1.0 ppm).

Application Field of 840004AGLFT

The 840004AGLFT is perfect for applications such as servers and data centers, wireless base stations, telecom infrastructure, industrial and automotive, and advanced test and measurement equipment. The advanced features of the device makes it suitable for low power, fastidious memory and storage, communications and serial backplanes, storage arrays and switches, and other applications.

Working Principle of 840004AGLFT

The 840004AGLFT’s working principle is based on the fact that a PLL is an electronic circuit used to generate a signal with a frequency that is relative to an input reference frequency. An input reference signal is applied to the VCO (voltage-controlled oscillator) of the PLL and the VCO adjusts its frequency according to the input signal. A phase detector compares the phase of the VCO output signal with that of the input reference signal and it generates a voltage which is proportional to the phase difference between the two signals. The phase difference is minimized through a low pass filter network by varying the frequency of the VCO. This in turn creates a stable frequency. The control voltage from the phase detector is used to control the frequency of the VCO.The 840004AGLFT has a highly integrated architecture that provides fast settling frequency synthesizers, very low jitter and harmonic distortion as well as low power dissipation. Its innovative design uses dual D-type flip-flops with an integrated XOR gate for each of the four edges of the PLL clock, plus four ancillary clock signals. This ensures that the output clock is precisely aligned with the input reference clock. The 840004AGLFT is a fully integrated design which eliminates the need of external components and thus allows very high integration density.

Conclusion

The 840004AGLFT is a highly reliable and cost-effective frequency synthesizer that is ideal for applications such as servers, data centers, telecom infrastructure, industrial and automotive applications, and more. Its advanced features such as low power dissipation and quick settling digital frequency synthesizer make it suitable for low power applications. Its design also ensures very low jitter and harmonic distortion, allowing for superior performance and reliability in critical applications.

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