MC145158DW2

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC145158DW2 is a CMOS phase-locked loop (PLL) frequency synthesizer designed for dual-modulus prescaler applications. It features fully programmable 14-bit reference and ÷N counters, alongside a 7-bit ÷A counter. The device supports serial programming via SPI-compatible inputs and includes an on-chip reference oscillator. Key specifications include a supply voltage range of 3.0 V to 9.0 V, an operating temperature range of –40°C to 85°C, and a lock detect output. It incorporates a linearized digital phase detector with single-ended or double-ended error signal options.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual-modulus capability with a 14-bit ÷R counter, 10-bit ÷N counter, and 7-bit ÷A counter
• Serial input interface compatible with SPI protocols for counter programming
• Integrated lock detector output indicating loop synchronization status
• On-chip reference oscillator support with external crystal connection pins

Clock Generators, PLLs, Frequency Synthesizers Applications

• CATV TV Tuning
• AM/FM Radios
• Two-Way Radios
• Amateur Radio Systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the component origin as the datasheet originates from Motorola/Freescale. Confirm that the DW2 suffix corresponds to the SOG package (Case 751F/G) and ensure compatibility with existing board layouts requiring this specific pin configuration and form factor.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the MC145158DW2 when a dual-modulus prescaler is required in the PLL architecture. This model is appropriate for designs needing serial data entry rather than parallel programming. Ensure the application operates within the specified 3.0 V to 9.0 V supply range and requires the specific counter bit depths provided by this variant.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the MC14515x–2 family of CMOS PLL frequency synthesizers. It serves as an improved-performance drop-in replacement for the MC145158–1, offering reduced power consumption and enhanced ESD and latch-up performance while maintaining functional compatibility.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The MC145158DW2 is explicitly documented as an improved-performance drop-in replacement for the MC145158–1.