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Home > Products > RF and Wireless > RF Transmitters

Silicon Labs SI4010-B1-GS

Name: SI4010-B1-GS
Brand: Silicon Labs
SKU: SI4010-B1-GS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI4010-B1-GS

Manufacturer:: Silicon Labs

Category:: RF Transmitters

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: SI4010-B1-GS.pdf

Description:: RF TX IC FSK 27-960MHZ 14SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SI4010-B1-GS from Silicon Laboratories is a crystal-less, single-chip RF transmitter SoC integrating an 8051 MCU core, +10 dBm FSK/OOK RF front-end, LDO regulator, temperature sensor, battery monitor, and AES accelerator. It operates from 1.8–3.6 V on coin-cell power, delivers <10 nA standby current, and supports 27–960 MHz ISM band transmission for remote keyless entry systems.

For engineers reviewing the SI4010-B1-GS datasheet, SI4010-B1-GS pinout, SI4010-B1-GS application, or SI4010-B1-GS equivalent, this page provides verified technical context, validated pin assignments for MSOP-10/SOIC-14 packages, confirmed RF and MCU specifications, real-world RKE use cases, and two documented alternative transceivers with functional alignment and known interface differences.

Technical Context

The SI4010-B1-GS implements a fully integrated RF transmitter architecture with a crystal-less VCO-based synthesizer, programmable output power up to +10 dBm, and automatic antenna tuning via integrated loop compensation. Its CIP-51 8051 core runs at up to 24 MHz (24 MIPS), executing 70% of instructions in 1–2 clocks.

Analog peripherals include a POR-enabled LDO, ±2°C accuracy temperature sensor, and low-battery detector; digital features comprise 4/8 GPIO with wake-up capability, 128-bit AES hardware acceleration, RTC, Timers 2/3, and C2 debug interface - all co-located on a single die with 8 kB NVM and 4 kB RAM.

Key Specifications

Parameter	Value and Actual Design Meaning
RF Frequency Range	27–960 MHz - covers global ISM bands including 315 MHz, 433 MHz, 868 MHz, and 915 MHz without external crystal.
Output Power	+10 dBm, adjustable - enables reliable link budget up to ~100 m in typical RKE environments with minimal external components.
Modulation	FSK and OOK - supports legacy and low-complexity protocols; Manchester/NRZ/4-5 encoding built-in for data integrity.
Supply Voltage	1.8–3.6 V - optimized for CR2032 and similar coin-cell batteries; internal LDO maintains stable core voltage across discharge curve.
Standby Current	<10 nA - extends battery life beyond 10 years in infrequent-use RKE applications with ultra-low-power sleep timer.
MCU Core	High-speed CIP-51 8051 - executes 24 MIPS at 24 MHz; pipeline architecture reduces instruction latency for real-time TX control.
Memory	8 kB NVM + 4 kB RAM - sufficient for firmware storage, encryption keys, and runtime variables in secure key fob applications.
Temperature Range	–40 to +85 °C - qualified for automotive cabin and outdoor home security deployments; AEC-Q100 option available.

Pinout & Package

SI4010-B1-GS is offered in two RoHS-compliant packages: 10-pin MSOP (3.0 × 4.9 mm) and 14-pin SOIC (3.9 × 8.7 mm). Both support application and programming/debug modes with distinct pin mappings.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power supply input	1.8–3.6 V main supply; powers analog/digital blocks and internal LDO regulator.
GND	Ground reference	Common return path for RF, MCU, and peripheral circuits; critical for EMI suppression in transmitter layout.
PA	RF power amplifier output	Direct connection to matching network and antenna; supports automatic tuning via internal loop compensation.
TXP / TXM	Differential RF output (SOIC only)	Alternative differential PA output configuration; used when higher EMI immunity or balanced antenna drive required.
PUSH	GPIO with wake-up	Active-low button input; triggers wake-from-sleep and initiates TX sequence without external interrupt controller.
GPIO[0–7]	Configurable digital I/O	4–8 pins support matrix scanning, LED drive (GPIO[5]), or general-purpose sensing; all support wake-on-change.

Key Features

Feature	Design Value
Crystal-less RF synthesis	Eliminates external crystal and associated load capacitors - reduces BOM count and PCB area in compact key fobs.
Integrated antenna tuning	Real-time loop compensation adjusts PA matching dynamically - maintains output power and efficiency across temperature and battery voltage drift.
Ultra-low-power sleep timer	Enables precise wake intervals down to sub-second resolution while consuming <10 nA - essential for periodic status polling or scheduled TX.
Hardware AES-128 accelerator	Offloads encryption/decryption from MCU core - ensures secure rolling-code generation without compromising TX latency or battery life.
On-chip debugging (C2)	Two-wire interface supports full-speed firmware download, breakpoint setting, and register inspection - accelerates RKE system validation.

Applications

Garage Door Opener Transmitter	Automotive Remote Keyless Entry (RKE)
Use Scenario: Wireless command transmission from handheld fob to garage receiver operating at 315 MHz. IC Role / Device Role / Timing Role: Single-chip RF transmitter and protocol processor; handles button scan, encryption, modulation, and PA control in one cycle. Use Value: Eliminates discrete MCU + RF IC + crystal + EEPROM - reduces component count by ≥5 parts and enables CR2032-only power.	Use Scenario: Secure vehicle unlock/lock using rolling code transmitted at 433/868 MHz with sub-100 ms latency. IC Role / Device Role / Timing Role: Full-stack transmitter SoC performing AES encryption, Manchester encoding, FSK modulation, and PA ramp control. Use Value: Meets automotive AEC-Q100 requirements with integrated temperature compensation and battery monitoring for field reliability.
Home Security Keypad Transmitter	Wireless Window/Door Sensor Node
Use Scenario: Battery-powered keypad sending alarm/disarm commands over 433 MHz ISM band with tamper detection. IC Role / Device Role / Timing Role: Low-power sensor interface and RF transmitter; wakes on button press or GPIO edge, transmits encrypted payload, returns to <10 nA sleep. Use Value: 10-year coin-cell lifetime achieved via hardware-accelerated sleep timer and zero-software-overhead wake-to-TX path.	Use Scenario: Self-powered contact sensor reporting open/closed state via short OOK burst every 5 minutes. IC Role / Device Role / Timing Role: Autonomous event-driven transmitter; uses internal RTC and GPIO interrupt to trigger minimal TX sequence without host MCU. Use Value: No external timing components needed - integrated LPOSC, sleep timer, and PA enable sequencing reduce bill-of-materials to sensor + antenna + battery.

Garage Door Opener Transmitter

Automotive Remote Keyless Entry (RKE)

Use Scenario: Wireless command transmission from handheld fob to garage receiver operating at 315 MHz.

IC Role / Device Role / Timing Role: Single-chip RF transmitter and protocol processor; handles button scan, encryption, modulation, and PA control in one cycle.

Use Value: Eliminates discrete MCU + RF IC + crystal + EEPROM - reduces component count by ≥5 parts and enables CR2032-only power.

Use Scenario: Secure vehicle unlock/lock using rolling code transmitted at 433/868 MHz with sub-100 ms latency.

IC Role / Device Role / Timing Role: Full-stack transmitter SoC performing AES encryption, Manchester encoding, FSK modulation, and PA ramp control.

Use Value: Meets automotive AEC-Q100 requirements with integrated temperature compensation and battery monitoring for field reliability.

Home Security Keypad Transmitter

Wireless Window/Door Sensor Node

Use Scenario: Battery-powered keypad sending alarm/disarm commands over 433 MHz ISM band with tamper detection.

IC Role / Device Role / Timing Role: Low-power sensor interface and RF transmitter; wakes on button press or GPIO edge, transmits encrypted payload, returns to <10 nA sleep.

Use Value: 10-year coin-cell lifetime achieved via hardware-accelerated sleep timer and zero-software-overhead wake-to-TX path.

Use Scenario: Self-powered contact sensor reporting open/closed state via short OOK burst every 5 minutes.

IC Role / Device Role / Timing Role: Autonomous event-driven transmitter; uses internal RTC and GPIO interrupt to trigger minimal TX sequence without host MCU.

Use Value: No external timing components needed - integrated LPOSC, sleep timer, and PA enable sequencing reduce bill-of-materials to sensor + antenna + battery.

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF transmitter SoC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AX5043-1-TX	Requires external crystal; no integrated MCU core - needs companion microcontroller for protocol handling.	Lacks on-chip AES, temperature sensor, and battery monitor - requires additional ICs for secure RKE implementation.	Preferred where RF performance priority outweighs integration; suitable for designs already using external 8051 or ARM host.
CC1110F32	2.4 GHz only; integrated 8051 but no crystal-less operation - mandates 26 MHz crystal and matching network.	Not compliant with sub-GHz ISM bands (315/433/868 MHz); incompatible with legacy RKE infrastructure.	Applicable only for new 2.4 GHz mesh or proprietary protocols; unsuitable as drop-in replacement for SI4010-B1-GS in existing sub-GHz designs.

Compared with AX5043-1-TX and CC1110F32, SI4010-B1-GS uniquely combines crystal-less sub-GHz RF, embedded 8051, and security peripherals in one package - enabling lowest-component-count, longest-battery-life RKE solutions without sacrificing regulatory compliance or design flexibility.

Availability

SI4010-B1-GS is available at Aetrix Electronics and suitable for remote keyless entry, garage door openers, and home security transmitters requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for SI4010-B1-GS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Silicon Laboratories is a U.S.-based semiconductor company specializing in mixed-signal ICs for timing, wireless, and MCU applications, with emphasis on integration and energy efficiency.

The SI4010-B1-GS belongs to Silicon Labs' sub-GHz transmitter SoC product line, designed specifically for ultra-low-power, high-reliability wireless control in battery-operated consumer and automotive key fobs.

FAQ

What is the primary function of the SI4010-B1-GS?

The SI4010-B1-GS is a fully integrated crystal-less RF transmitter SoC combining an 8051 MCU, +10 dBm FSK/OOK transceiver, LDO regulator, temperature sensor, battery monitor, and AES accelerator. Its primary function is to serve as the complete wireless transmission engine in battery-powered remote controls - eliminating need for external crystal, MCU, or encryption IC. SI4010-B1-GS enables rapid development of secure, long-life RKE and home automation transmitters.

Does the SI4010-B1-GS require an external crystal?

No, the SI4010-B1-GS operates crystal-less using an integrated high-speed VCO and programmable low-power oscillator (LPOSC). This eliminates external crystal and load capacitors, reducing BOM cost and PCB footprint. An optional crystal oscillator input is supported for applications requiring tighter frequency stability, but it is not required for standard operation. SI4010-B1-GS achieves ±150 ppm frequency accuracy across temperature and voltage without external timing components.

What package options are available for the SI4010-B1-GS?

The SI4010-B1-GS is available in two industry-standard packages: 10-pin MSOP (3.0 × 4.9 mm) and 14-pin SOIC (3.9 × 8.7 mm), both Pb-free and RoHS compliant. Pin functions differ between packages - for example, TXP/TXM differential outputs are only available on the SOIC variant, while MSOP uses single-ended PA output. SI4010-B1-GS documentation provides separate pin definitions for application and programming/debug modes in each package.

How does the SI4010-B1-GS achieve ultra-low standby current?

The SI4010-B1-GS achieves <10 nA standby current through multiple hardware-level optimizations: dedicated ultra-low-power sleep timer, automatic clock gating across unused peripherals, retention of only 8-byte low-leakage RAM during deep sleep, and intelligent power domain isolation. All digital logic except the wake-up controller is powered down, and the RF synthesizer is fully disabled. SI4010-B1-GS maintains this spec across –40 to +85 °C, enabling >10-year battery life in intermittent-use applications like key fobs.

Can the SI4010-B1-GS be used in automotive applications?

Yes - the SI4010-B1-GS offers an AEC-Q100 qualified automotive grade option, meeting stress test requirements for temperature cycling, humidity, and mechanical shock. Its integrated temperature sensor (±2°C accuracy), battery voltage monitor, and wide operating range (–40 to +85 °C) support under-hood and cabin deployment. SI4010-B1-GS is widely deployed in Tier-1 automotive RKE systems where reliability, longevity, and regulatory compliance are mandatory.

SI4010-B1-GS Specifications

Product attributes: Attribute value

Manufacturer:: Silicon Labs

Series:: EZRadio®

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Verified

Frequency:: 27MHz ~ 960MHz

Applications:: Garage Openers, RKE, Security Alarms

Modulation or Protocol:: FSK, OOK

Data Rate (Max):: 100kBaud

Power - Output:: 10dBm

Current - Transmitting:: 19.8mA

Data Interface:: PCB, Surface Mount

Antenna Connector:: PCB, Surface Mount

Memory Size:: 4kB RAM

Features:: 8051 MCU Core, Crystal-less Operation

Voltage - Supply:: 1.8V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

SI4010-B1-GS FAQ

1.How can I place an order for SI4010-B1-GS through Aetrix?

Please submit a Request for Quotation (RFQ) for SI4010-B1-GS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SI4010-B1-GS reliable?

The price and inventory of SI4010-B1-GS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI4010-B1-GS is usually 5 days.

3.What payment methods are accepted for SI4010-B1-GS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI4010-B1-GS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI4010-B1-GS?

SI4010-B1-GS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI4010-B1-GS order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SI4010-B1-GS?

For technical support, including SI4010-B1-GS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI4010-B1-GS requirements.

6.How does Aetrix verify that SI4010-B1-GS is sourced from the original manufacturer or authorized distributors?

All SI4010-B1-GS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI4010-B1-GS meets industry standards.

7.What is the process for return or replacement of SI4010-B1-GS?

All SI4010-B1-GS units undergo pre-shipment inspection (PSI). If there is an issue with SI4010-B1-GS, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SI4010-B1-GS part is unused and in its original packaging.

Return procedure for SI4010-B1-GS:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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