843N252 Series

FemtoClock NG Crystal-to-3.3V LVPECL Frequency Synthesizer

Manufacturer: Renesas Electronics Corporation

Catalog

FemtoClock NG Crystal-to-3.3V LVPECL Frequency Synthesizer

Part	Package Length	Package Name	Package Width	Operating Temperature (Max)	Operating Temperature (Min)	Frequency - Max	Multiplier	Divider	Output	Mounting Type	Input	Differential Output	Differential Input	Output Ratio	Input Ratio	Type	Voltage - Supply (Minimum)	Voltage - Supply (Maximum)	PLL	Number of Circuits
Renesas Electronics Corporation 843N252GG-45LFT	0.173 in	16-TSSOP	4.4 mm	70 °C	0 °C	156.25 MHz	No	Yes	LVCMOS LVPECL LVTTL	Surface Mount	Crystal	Yes	No	1	1	Frequency Synthesizer	3.135 V	3.465 V	Yes	1

Catalog

FemtoClock NG Crystal-to-3.3V LVPECL Frequency Synthesizer

Description

The 843N252-45 is a 1 LVPECL and 1 LVCMOS output synthesizer optimized to generate Ethernet reference clock frequencies. The device uses our fourth generation FemtoClock ® NG technology for an optimum of high clock frequency and low phase noise performance, combined with low power consumption and high power supply noise rejection. Using a 25MHz parallel resonant crystal, the following frequencies can be generated: 156.25MHz and 125MHz. With a very low phase noise VCO it is targeted to achieve 0.4ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The 843N252-45 is packaged in a small 16-pin TSSOP package.