Description

The any-frequency, any-output Si5341/40 clock generators combine a wide-band PLL with proprietary MultiSynth fractional synthesizer technology to offer a versatile and high performance clock generator platform. This highly flexible architecture is capable of synthesizing a wide range of integer and non-integer related frequencies up to 800 MHz on 10 differential clock outputs while delivering sub-100 fs rms phase jitter performance and 0 ppm error. Each of the clock outputs can be assigned its own format and output voltage enabling the Si5341/40 to replace multiple clock ICs and oscillators with a single device making it a true “clock tree in a chip”.

Features

■ Generates free-running or synchronous output clocks

■ MultiSynth™ technology enables any-frequency synthesis on anyoutput with 0 ppm frequency accuracy with respect to the input

■ Highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, HCSL, or programmable voltage swing and common mode

■ Excellent jitter: <100 fs RMS typ

■ Input frequency range:

● External crystal: 25, 48-54 MHz

● Differential clock: 10 to 750 MHz

● LVCMOS clock: 10 to 250 MHz

■ Output frequency range: Differential: 100 Hz to 800 MHz LVCMOS: 100 Hz to 250 MHz

■ Output-output skew: <100 ps

■ Adjustable output-output delay

■ Optional zero delay mode

■ Independent glitchless on-the-fly output frequency changes

■ DCO mode with frequency increment and decrement as low as 0.001 ppb/step

■ Core voltage:

● VDD: 1.8 V ±5

● VDDA: 3.3 V ±5

■ Independent output supply pins: 3.3V, 2.5V, or 1.8V

■ Built-in power supply filtering

■ Status monitoring: LOS, LOL

■ Serial Interface: I2C or SPI (3-wire or 4-wire)

■ In-circuit programmable with nonvolatile OTP memory (2x programmable)

■ ClockBuilder ProTM software utility simplifies device configuration and assigns customer part numbers

■ Si5341: 4 input, 10 output, 64 QFN

■ Si5340: 4 input, 4 output, 44 QFN

■ Temperature range: –40 to +85 °C

■ Pb-free, RoHS-6 compliant

Applications

■ Clock tree generation replacing XOs, buffers, signal format translators

■ Any-frequency synchronous clock translation

■ Clocking for FPGAs, processors, memory

■ Ethernet switches/routers

■ OTN framers/mappers/processors

■ Test equipment & instrumentation

■ Broadcast video