Texas Instruments has introduced a flexible and highly integrated clock jitter cleaner/multiplier for use in wired communications and test-and-measurement applications. The LMK04906 offers three redundant inputs with a holdover feature and seven programmable outputs. This flexibility allows designers to eliminate external components, such as oscillators and clock buffers, significantly reducing their BOM cost and board space. In addition, with industry-leading RMS jitter of 100 fs and noise floor of -160 dBc/Hz, the LMK040906 can improve signal integrity in high-speed data communications systems.
Key features and benefits of the LMK04906
- Maximum flexibility: Integration of seven high-performance, programmable outputs offered in LVDS, LVPECL, and LVCMOS simplifies timing design.
- Integration reduces BOM costs: High integration eliminates the need for the oscillators and clock buffers typically used to implement a low-jitter clock tree. Features such as holdover, input switching, analog/digital delay, and odd/even dividers increase clocking functionality while reducing cost.
- Low jitter and phase noise: 100 fs RMS jitter from 12 kHz to 20 MHz with a noise floor of -160 dBc/Hz at 156.25 MHz output frequency enables greater signal integrity in high-speed data communication links such as 10GbE, FC, FCoE, and SAS/SATA.
In addition, TI introduced the CDCM6208 clock synthesizer and jitter cleaner, which offers similar integration and flexibility for wireless base stations, pico and femto cells, line cards, and handheld medical equipment. The CDCM6208 provides eight low-jitter clock outputs, pin-control mode, flexible output voltages, and a fractional divider.
Tools and support
TI's clock design tool supports the LMK04906, aiding designers with part selection, loop filter design, and simulation of timing devices. The LMK04906 evaluation module (EVM) and IBIS model are available today. Two CDCM6208 EVMs, EVM control GUI, and IBIS model are also available.
Availability, packaging, and pricing
The LMK04906 is available today in a 64-pin, 9 x 9-mm QFN package for a suggested retail price of US$6.49 in 1,000-unit quantities. The CDCM6208 is available today in a 48-pin, 7 x 7-mm package for a suggested retail price of US$6.50 in 1,000-unit quantities.