SI4136-BM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Si4136-BM is a monolithic ISM RF synthesizer with integrated VCOs for wireless communications, manufactured by Silicon Laboratories (now Skyworks Solutions). It performs both IF and dual-band RF synthesis using three complete phase-locked loops. The device features an RF1 band of 2300 MHz to 2500 MHz, an RF2 band of 2025 MHz to 2300 MHz, and an IF synthesizer range of 62.5 MHz to 1000 MHz. It operates on a 2.7 V to 3.6 V supply with a typical current of 25.7 mA and includes a self-tuning algorithm to compensate for inductance variations. The component is housed in a 28-lead MLP package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual-band RF synthesis covering 2025 MHz to 2500 MHz
• Integrated IF synthesizer with programmable divider (÷1, ÷2, ÷4, ÷8)
• Self-tuning algorithm compensates for external inductor tolerance errors
• Low standby current of 5 µA via hardware or software powerdown

Clock Generators, PLLs, Frequency Synthesizers Applications

• ISM and MMDS band communications
• Wireless LAN (W-LAN) and Wireless WAN designs
• Dual-band communication systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturer designation as Silicon Laboratories Inc., noting that Skyworks Solutions acquired the entity. Confirm the specific ordering suffix '-BM' corresponds to the 28-lead MLP package variant rather than the 24-pin TSSOP ('-BT') version. Ensure compatibility with the required external inductor values for the IF VCO center frequency setting.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing systems requiring dual-band RF synthesis in the 2.4 GHz ISM band combined with a flexible IF output. The choice between RF1 and RF2 depends on the specific frequency allocation within the 2025–2500 MHz range. Designers must account for the package inductance (2.1 nH) when calculating the external inductance required for the IF VCO center frequency.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The Si4136-BM is part of the Si4136/Si4126 family of ISM RF synthesizers. The 'Si4136' designation specifically refers to the dual-band RF capability (RF1/RF2), whereas the Si4126 variant typically supports different frequency ranges. The '-BM' suffix identifies the 28-lead MLP package, distinguishing it from the '-BT' TSSOP package option.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.