RTC clock synchronization buffer driver delay chip

The NBC12430 and NBC12430A are general-purpose, PLL-based synthesized clock sources. The VCO operates from 400 MHz to 800 MHz. The VCO frequency is sent to the N output divider, which can now be configured to provide divide ratios of 1, 2, 4, or 8. The VCO and output frequency are programmable using the configuration logic's parallel or serial interface. Output frequencies of 250 KHz, 500 KHz, 1.0 MHz, 2.0 MHz can be achieved using a 16 MHz crystal, depending on the output divider setting. The PLL loop filter is fully integrated without any external components. The NBC12430 is specified to operate over the commercial temperature range. The NBC12430A is specified to operate over the industrial temperature range.

The MC12026 is a high frequency low voltage dual mode prescaler for phase locked loop (PLL) applications. The MC12026A can be used with a CMOS synthesizer that requires a rising edge to trigger an internal counter in the PLL to provide a tuning signal up to 1.1 GHz in programmable frequency steps. A divider control (SW) allows selection of a divider ratio of 8/9 or 16/17 as desired. After biasing the SW to select the desired division ratio, the modulus control (MC) selects the appropriate divisor.