The NBC12439 and NBC12439A are a general purpose, PLL based synthesized clock sources. The VCO will operate over a frequency range of 400 MHz to 800 MHz. The VCO frequency is sent to the N-output divider, where it can be configured to provide division ratios of 1, 2, 4 or 8. The VCO and output frequency can be programmed using the parallel or serial interfaces to the configuration logic. The PLL loop filter is fully integrated and does not require any external components.The NBC12439 is specified to operate across the commercial temperature range.The NBC12439A is specified to operate across the industrial temperature range.

• Best-in-Class Output Jitter Performance, ±20 ps Peak-to-Peak
• 50 MHz to 800 MHz Programmable Differential PECL Outputs
• Fully Integrated Phase-Lock-Loop with Internal Loop Filter
• Parallel Interface for Programming Counter and Output Dividers During Power-Up
• Minimal Frequency Overshoot
• Serial 3-Wire Programming Interface
• Crystal Oscillator Interface
• Operating Range: VCC = 3.135 V to 5.25 V
• CMOS and TTL Compatible Control Inputs
• Drop in replacement for Motorola MC12439
• Power-Down of PECL Outputs (divide 16)
• Pb-Free Packages are Available