SI4136-BT - 2.5GHz RF Synthesizer with Integrated VCOs
MPN: SI4136-BT ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SI4136-BT Overview
A frequency synthesizer is a Clock & Timing IC that generates one or more stable, programmable output frequencies from a reference clock. An RF synthesizer combines a voltage-controlled oscillator, frequency dividers, phase detectors, loop filters, and control logic to support wireless transmitters and receivers. The SI4136 belongs to the broader clock-generation and timing hierarchy, where accurate frequency generation is essential for RF modulation, demodulation, channel selection, and local-oscillator requirements.
The SI4136-BT integrates three VCOs, loop filters, varactors, resonators, reference and VCO dividers, and phase detectors. This integration reduces the external circuitry needed for an RF synthesis solution. Its 2.5 GHz maximum operating frequency makes it suitable for ISM wireless communication equipment operating within the supported RF range. The 24-TSSOP package is identified as approximately 4.40 mm wide by the distributor listing.
Programming divider and power-down settings is handled through a three-wire serial interface, allowing the host controller to configure operating conditions during system startup or mode changes. The low phase-noise characteristic is relevant to receiver and transmitter designs where unwanted phase modulation can degrade signal quality. The 5 uA standby current supports low-power operating states, while the 25.7 mA typical supply current provides a basis for power-budget analysis.
Typical applications include ISM-band wireless transceivers, RF front ends, wireless communications modules, local-oscillator generation, and communication boards requiring programmable RF or IF synthesis. System designers should account for reference-clock stability, supply decoupling, output routing, control-interface timing, and the device's package footprint during PCB layout.
For a new design, validate the required output frequency, reference frequency, divider range, control protocol, supply voltage, and RF performance against the manufacturer datasheet before layout release. This page consolidates the verified distributor and manufacturer-linked information and clearly marks specifications that were not present in the supplied data rather than estimating them.
Drop-in alternatives for SI4136-BT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with SI4136-BT (same form factor and footprint) — differing in Package Width, Standby Current, Integrated Functions, Mounting Type, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SI4136-F-GT
✅ Drop-In✓ In Stock
$12.6637 / Unit
View Datasheet →SI4136-F-BT
✅ Drop-In📋 Reference alternative (not in catalog)
SI4136-BT
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →SI4136
✅ Drop-In📋 Reference alternative (not in catalog)
SI4136-BT Specifications
| Device Type | ISM RF frequency synthesizer IC |
| Maximum Operating Frequency | 2.5 GHz |
| Number of Integrated VCOs | 3 |
| Integrated Functions | VCOs, loop filters, varactors, resonators, reference divider, VCO divider, and phase detectors |
| Control Interface | Three-wire serial interface |
| Programmable Settings | Divider and power-down settings |
| Standby Current | 5 uA |
| Typical Supply Current | 25.7 mA |
| Output Frequency Information | 2.5 GHz maximum operating frequency |
| Package | 24-TSSOP |
| Package Width | 4.40 mm |
| Mounting Type | Surface mount |
| Phase Noise | Low phase noise; numeric value not provided in verified data |
| External Component Requirement | Minimal external components required |
SI4136-BT 4.40 mm Pin Configuration Guide
Pin configuration for SI4136-BT (4.40 mm package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SI4136-BT.
Refer to the datasheet for full pin configuration.
Typical Applications
SI4136-BT is suitable for 6 applications: ISM Wireless Transceiver RF Front End, Wireless Communications Module, Programmable Local Oscillator, RF Signal Generator, Industrial Wireless Control, Low-Power Wireless Sensor Node.
ISM Wireless Transceiver RF Front End
The SI4136-BT fits an ISM wireless transceiver RF front end because it combines three integrated VCOs with reference and VCO dividers, phase detectors, loop filters, varactors, and resonators. Its maximum operating frequency is 2.5 GHz, giving the designer a programmable RF synthesis resource for supported wireless bands. The three-wire serial interface allows divider and power-down settings to be configured by the host controller. The tradeoff is that the verified data does not provide the complete frequency table or output-power specifications, so the target band and link budget must be checked against the manufacturer datasheet before PCB release.
Recommended
Wireless Communications Module
For a compact wireless communications module, the SI4136-BT offers an integrated RF synthesis solution with three VCOs and programmable divider settings. The 24-TSSOP package supports surface-mount assembly, while the three-wire serial interface reduces the number of dedicated control lines when connected to a host MCU or embedded controller. Its 5 uA standby current is useful for low-power states, although the complete supply-voltage conditions and wake-up timing were not supplied. Engineers should verify RF routing, reference-clock stability, decoupling, and regulatory channel requirements in the system design.
Recommended
Programmable Local Oscillator
The SI4136-BT can serve as a programmable local-oscillator source when the receiver or transmitter needs selectable RF frequencies. The integrated phase detectors and dividers provide the core elements of a closed-loop frequency-synthesis architecture, while the three integrated VCOs support multiple internal frequency-generation resources. The verified maximum operating frequency is 2.5 GHz and the device is identified as low phase noise, but no numeric phase-noise curve was provided. Validate tuning range, reference input, lock behavior, spur performance, and output impedance against the manufacturer datasheet.
Recommended
RF Signal Generator
The SI4136-BT is appropriate for a compact RF signal-generation section where programmable RF or IF synthesis is required. Its integrated VCOs, loop filters, resonators, dividers, and phase detectors reduce the number of discrete frequency-synthesis blocks, which can simplify a small wireless test fixture or communication board. The 25.7 mA typical supply current provides an initial current-budget reference, while the 5 uA standby specification supports a low-power operating state. Because the verified data does not state output power or harmonic specifications, those parameters must be measured or obtained from the datasheet before use in a precision signal source.
Recommended
Industrial Wireless Control
The SI4136-BT can support an industrial wireless-control design that requires stable, programmable RF synthesis. The three-wire serial interface permits host-controlled divider and power-down settings, allowing the radio state to be coordinated with the rest of the equipment. Its surface-mount 24-TSSOP package and integrated synthesizer functions are useful for compact control electronics. The supplied results do not identify an industrial temperature grade, EMC qualification, or exact supply-voltage limits, so those requirements must be verified separately for factory, machine, or process-control environments.
Recommended
Low-Power Wireless Sensor Node
The SI4136-BT may fit a wireless sensor node that spends significant time in standby while periodically enabling RF activity. The verified 5 uA standby current is the key power-management consideration, while programmable power-down settings can help coordinate the synthesizer state with the node's control firmware. The three integrated VCOs and integrated loop components support RF synthesis without the same external component count as a discrete implementation. Before selecting the device, confirm the operating supply voltage, wake-up behavior, reference clock, and RF settling requirements; these values were not included in the supplied evidence.
Recommended
Engineering reference data for SI4136-BT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SI4136-F-GT | SI4136-F-BT | SI4136 |
|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP |
| Device Function | ISM RF synthesizer with integrated VCOs | SI4136-family RF synthesizer | SI4136-family RF synthesizer | ISM RF synthesizer with integrated VCOs |
| Control Interface | Three-wire serial interface | Three-wire serial interface described for SI4136 family | Three-wire serial interface described for SI4136 family | Three-wire serial interface |
Key Differentiators
- Three integrated VCOs (vs SI4136-F-GT)
- 2.5 GHz maximum operating frequency (vs SI4136-F-BT)
- 5 uA standby current (vs SI4136)
Design Notes
Design the power rail and bypass network from the manufacturer datasheet's specified supply-voltage range and operating-current limits. The supplied feature information identifies 25.7 mA typical supply current and 5 uA standby current, but it does not provide the voltage conditions or absolute maximums, so those figures must not be treated as a complete power specification.
Place the SI4136-BT in a controlled RF layout and route the oscillator, divider, reference, and output connections according to the manufacturer application guidance. Keep the three-wire serial control traces away from sensitive RF paths where practical, provide a clean reference connection, and follow the TSSOP land pattern from the official package drawing because the supplied data does not include a pin table.
Validate reference-clock jitter, loop settling, divider ratios, and output spur performance for the intended wireless channel. The verified data identifies low phase noise but provides no numeric phase-noise curve or spur table; therefore, an RF performance budget must be measured on the final board or extracted from the manufacturer datasheet.
Do not assume that a related SI4136 ordering variant is automatically interchangeable. SI4136-BT, SI4136-F-BT, SI4136-F-GT, and the base SI4136 listing appear in the supplied search results, but the evidence does not verify complete pin mapping, divider ranges, temperature grades, or supply limits. Check the official ordering table and pinout before substitution.
Compliance Information
The supplied verified results describe the SI4136-BT as a Silicon Labs ISM RF synthesizer and identify its package and electrical features, but do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements.
