SENASIC SNP736 BLE Tire Pressure Monitoring System IC

The SENASIC SNP736 is a highly integrated Tire Pressure Monitoring System (TPMS) integrated circuit designed for modern automotive, electric vehicle (EV), and intelligent mobility applications. Combining a high-precision pressure sensor, temperature sensor, MEMS accelerometer, battery voltage monitoring, RF transmitter, and an embedded 8051 microcontroller into a compact LGA24 package, the SNP736 enables manufacturers to develop compact, low-power, and highly reliable TPMS sensor modules for passenger cars, commercial vehicles, electric motorcycles, and intelligent transportation systems. The device supports Bluetooth Low Energy (BLE) 4.2 as well as Sub-1GHz RF communication, making it suitable for both traditional TPMS architectures and next-generation connected vehicle platforms.

Designed for Next-Generation Intelligent Tire Monitoring

Tire pressure monitoring has become an essential safety feature in modern vehicles. Proper tire pressure improves braking performance, handling stability, tire lifespan, and energy efficiency while reducing the risk of blowouts and uneven tire wear. The SENASIC SNP736 is specifically engineered to provide accurate real-time monitoring of tire pressure and temperature while offering intelligent wireless connectivity for modern automotive electronic architectures.

Unlike conventional TPMS solutions that rely on multiple discrete components, the SNP736 integrates sensing, signal processing, RF communication, and system control into a single highly integrated chip. This significantly reduces PCB complexity, lowers manufacturing costs, improves system reliability, and simplifies module development for automotive OEMs and Tier-1 suppliers. 

High Integration for Compact TPMS Modules

One of the major advantages of the SNP736 is its high level of functional integration. The chip incorporates a factory-calibrated MEMS pressure sensor, precision temperature sensor, battery voltage monitoring circuit, dual-axis accelerometer, RF transmitter, embedded Flash memory, low-frequency receiver, timers, ADC, and an 8-bit 8051-compatible MCU. These integrated components eliminate the need for numerous external devices while reducing board size and improving manufacturing efficiency.

The embedded microcontroller manages sensor acquisition, measurement scheduling, data formatting, RF transmission, sleep control, and customer application programming. Integrated Flash memory stores application firmware, calibration coefficients, sensor identification numbers, and customer-specific configuration parameters, allowing manufacturers to customize TPMS behavior without additional hardware.

Accurate Pressure and Temperature Measurement

Accurate tire pressure monitoring is essential for vehicle safety and performance. The SNP736 delivers calibrated pressure measurement with an accuracy of ±3 kPa throughout an operating temperature range of -40°C to +125°C. The integrated temperature sensor provides ±2°C accuracy between -20°C and +70°C, allowing precise compensation of pressure readings while monitoring tire operating conditions.

The chip supports pressure ranges up to 900 kPa or 1900 kPa depending on the selected version, making it suitable for passenger vehicles, commercial trucks, off-road vehicles, industrial machinery, and electric transportation platforms operating under different tire pressure requirements.

Integrated MEMS Motion Detection

The built-in calibrated MEMS accelerometer enables intelligent motion detection without requiring external sensors. Vehicle movement information can be used to automatically switch between operating modes, optimize measurement intervals, reduce power consumption, and improve overall battery life. Motion sensing also allows TPMS modules to distinguish between parked and moving vehicles, ensuring that wireless communication only occurs when necessary.

This intelligent power management strategy extends battery service life while maintaining fast response times whenever tire pressure abnormalities occur. 

Dual Wireless Communication Support

The SNP736 supports both Bluetooth Low Energy (BLE 4.2) and traditional Sub-1GHz RF transmission, offering exceptional flexibility for automotive system designers. BLE enables direct communication with smartphones, tablets, infotainment systems, and central vehicle controllers, eliminating the need for dedicated TPMS receiver modules in many modern vehicle architectures. 

For traditional automotive applications, the integrated Sub-1GHz transmitter supports 315 MHz and 433 MHz communication with ASK, FSK, and GFSK modulation. This dual-mode capability allows manufacturers to support multiple vehicle platforms using a single hardware design while reducing inventory complexity.

Low Power Consumption for Long Battery Life

Battery life is one of the most important considerations for TPMS sensor modules because the battery is sealed inside the tire sensor. The SNP736 is designed with ultra-low standby current of approximately 0.5 μA, allowing TPMS modules to operate reliably for many years without battery replacement. During RF transmission, current consumption remains carefully optimized to balance wireless performance with long-term battery endurance. 

Software-controlled wake-up mechanisms, interval timers, and motion-triggered operation further reduce energy consumption while ensuring continuous monitoring whenever the vehicle is in use.

Flexible Development and Firmware Customization

The embedded 8051-compatible MCU enables manufacturers to implement customized TPMS algorithms, communication protocols, encryption methods, and diagnostic functions directly within the chip. Measurements of pressure, temperature, battery voltage, and acceleration can be scheduled under software control, while collected data can be formatted, encrypted, and transmitted according to application requirements. 

The integrated low-frequency receiver also supports wireless Flash programming, allowing firmware updates during product development without requiring physical I²C connections. This significantly improves engineering efficiency and simplifies production programming processes.

Excellent RF Performance

Reliable wireless communication is critical for automotive safety systems. The SNP736 integrates PLL synthesizers, efficient RF power amplifiers, and modulation circuitry to provide stable wireless performance across multiple frequency bands. BLE communication supports modern connected vehicle ecosystems, while Sub-1GHz RF transmission provides compatibility with traditional TPMS receivers used worldwide.

The combination of high receiver sensitivity, optimized RF current consumption, and robust modulation techniques allows reliable communication even in challenging automotive environments with significant electromagnetic interference.

Automotive Reliability

The SNP736 has been developed specifically for automotive applications requiring long-term stability under harsh environmental conditions. The chip operates over a wide temperature range from -40°C to +125°C and supports continuous operation in demanding environments including high vibration, humidity, thermal cycling, and mechanical shock.

Its compact LGA24 package measuring only 6.0 × 5.0 × 1.9 mm enables integration into miniature TPMS sensor assemblies while maintaining high manufacturing reliability and mechanical robustness.

Applications

• Passenger vehicle TPMS modules
• Electric vehicle tire monitoring systems
• Commercial truck TPMS sensors
• Electric motorcycle tire monitoring
• Connected vehicle platforms
• Fleet management systems
• Automotive wireless sensor modules
• Industrial vehicle tire monitoring
• Autonomous vehicle sensing systems
• Smart mobility platforms

Key Features

• Highly integrated TPMS system-on-chip architecture
• Built-in calibrated MEMS pressure sensor
• Integrated temperature sensing and battery voltage monitoring
• Built-in calibrated MEMS accelerometer
• Embedded 8051-compatible microcontroller
• BLE 4.2 and Sub-1GHz RF wireless transmission
• Support for 315 MHz, 433 MHz and 2.4 GHz communication
• Ultra-low standby current for long battery life
• Factory-calibrated sensing performance
• Compact LGA24 package for space-constrained designs

Specifications

Benefits for EV and Intelligent Mobility

As electric vehicles continue to adopt centralized electronic architectures and wireless connectivity, TPMS technology is evolving beyond simple pressure monitoring. The SENASIC SNP736 enables direct Bluetooth communication with vehicle infotainment systems, central controllers, mobile applications, and cloud-connected fleet management platforms. This reduces hardware costs, simplifies vehicle wiring, and creates opportunities for predictive maintenance, intelligent diagnostics, and enhanced driver experience.

Whether integrated into electric passenger cars, commercial vehicles, autonomous platforms, or advanced mobility solutions, the SENASIC SNP736 provides a highly integrated, low-power, and automotive-grade TPMS solution that combines sensing accuracy, wireless flexibility, compact size, and long-term reliability. Its comprehensive feature set makes it an ideal choice for manufacturers developing the next generation of intelligent tire monitoring systems for connected and electrified transportation.