TDA5240 - Multi-Band ASK/FSK RF Receiver -118dBm | Infineon
MPN: TDA5240 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.56 | $35.60 |
| 100 | $3.18 | $318.00 |
| 500 | $2.86 | $1,430.00 |
| 1,000 | $2.55 | $2,550.00 |
Drop-in alternatives for TDA5240 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TDA5235XUMA1
✅ Drop-In✓ In Stock
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View Datasheet →TDA5225
✅ Drop-In📋 Reference alternative (not in catalog)
TDA5230
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.28 / Unit
View Datasheet →TDA5211
✅ Drop-In ⚠️ 参数待验证✓ In Stock
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View Datasheet →TDA5200
✅ Drop-In ⚠️ 参数待验证✓ In Stock
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View Datasheet →TDA5240 Maximum Ratings & Electrical Characteristics
| Product Family | SmartLEWIS RX |
| Function | Wireless control receiver |
| Modulation | ASK, FSK |
| Frequency Bands | 300-320 MHz, 425-450 MHz, 863-870 MHz, 902-928 MHz |
| Sensitivity (FSK) | -118 dBm (typ.) |
| Sensitivity (ASK) | -116 dBm (typ.) |
| Maximum Data Rate | 112 kcps |
| Parallel Parameter Sets | 4 |
| Frequency Channels | Up to 12 |
| Supply Voltage | 3.3 V / 5 V |
| Grade | Automotive |
| Special Modes | Autonomous receive mode |
| Package | PG-TSSOP-28 |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T/R) |
TDA5240 pg-tssop-28 Pin Configuration Guide
Complete pinout information for TDA5240 (pg-tssop-28 package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for TDA5240.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TDA5240 is suitable for 6 applications: Remote Keyless Entry (RKE) Receivers, Tire Pressure Monitoring Systems (TPMS), Wireless Remote Controls, Smart Home and IoT Sensor Links, Industrial Telemetry and SCADA Sensors, Security and Alarm Systems.
Remote Keyless Entry (RKE) Receivers
The TDA5240 fits RKE receiver modules because its typ. -118 dBm FSK sensitivity extends the usable link budget for compact key fobs with limited transmit power, and its 4 parallel parameter sets let one receiver unit handle multiple fob protocols or regional frequency plans (315 MHz / 433.92 MHz / 868 MHz). In the vehicle body controller, the TDA5240 connects to the antenna matching network and streams demodulated telegrams to the host MCU over SPI, while embedded decoding offloads protocol handling from the microcontroller. Using autonomous receive mode, the MCU stays in sleep until a valid telegram arrives, cutting standby current and reducing host-induced noise, which further improves real-world sensitivity. The 112 kcps data rate covers typical RKE telegrams with margin.
Recommended
Tire Pressure Monitoring Systems (TPMS)
TPMS receiver nodes benefit directly from the TDA5240's -118 dBm FSK typical sensitivity, since tire sensors transmit very short, low-power bursts and every dB of receive sensitivity extends reception range around the vehicle. The 425-450 MHz band covers the common 433.92 MHz TPMS allocation, and the multi-channel capability lets the receiver hop across sensor channels to reduce collisions when multiple wheels transmit. Its automotive-grade classification matches under-hood and in-cabin environmental expectations, and the 3.3 V / 5 V supply flexibility simplifies integration into body-domain ECUs. With autonomous receive mode, the always-listening TPMS receiver maintains low average current draw between wheel-sensor telegrams, preserving vehicle battery life during long parking periods.
Recommended
Wireless Remote Controls
Generic wireless remote control receivers in home automation, gate openers and industrial handsets use the TDA5240 for its wide band coverage (300-320 MHz, 425-450 MHz, 863-870 MHz, 902-928 MHz) and embedded encoding support, which accommodates legacy ASK remotes as well as newer FSK protocols. The up-to-12 channel capability lets a single receiver product SKU serve multiple regional markets, simplifying logistics. Because several embedded encodings and modulation formats are handled on-chip, a low-cost 8-bit MCU is sufficient as the host, reducing total BOM cost. The -116 dBm ASK typical sensitivity ensures reliable decoding even for low-cost remote transmitters with modest output power and imperfect antennas.
Recommended
Smart Home and IoT Sensor Links
Sub-GHz ISM links in smart home sensors, door/window contacts and actuator receivers exploit the TDA5240's combination of -118 dBm sensitivity and low standby operation. Sub-GHz propagation penetrates walls better than 2.4 GHz, and the high sensitivity compensates for coin-cell-powered sensors transmitting milliwatt-level bursts. The four-band coverage lets OEMs ship the same receiver hardware in EU (868 MHz), US (915 MHz) and Asia (315/433 MHz) variants by selecting parameter sets in firmware. Embedded decoding reduces host MCU wake-ups, and autonomous receive mode keeps the gateway receiver responsive while the processor sleeps, achieving the low average current that battery and energy-harvesting powered nodes demand.
Recommended
Industrial Telemetry and SCADA Sensors
Industrial telemetry nodes reporting tank levels, meter readings or machine status benefit from the TDA5240's robust link budget: typ. -118 dBm FSK sensitivity sustains communication across metal-rich factory floors where path loss is high. The 12-channel capability supports frequency-agile polling schemes that avoid interference from other ISM-band equipment, and multiple parameter sets allow coexistence of legacy ASK field devices alongside newer FSK nodes on one receiver. The automotive-grade quality level also translates to industrial temperature and reliability expectations. Integration is straightforward: SPI interface to the plant controller, external crystal and antenna matching network, and supply from either a 3.3 V logic rail or a 5 V industrial rail.
Recommended
Security and Alarm Systems
Wireless security receivers for PIR sensors, door contacts and panic buttons demand both long battery-backed standby and guaranteed message reception - exactly the TDA5240's strengths. Its autonomous receive mode continuously polls for telegrams while the panel MCU sleeps, and the -116 dBm ASK / -118 dBm FSK sensitivity ensures edge-of-range sensors remain connected in large buildings. Supporting several embedded encodings allows the alarm receiver to accept devices from multiple sensor generations or third-party peripherals without firmware complexity. The quad-band coverage (315/433/868/915 MHz markets) means one receiver PCB serves global alarm-panel SKUs, and the 112 kcps data rate comfortably handles alarm telegrams with retransmission margin.
Recommended
Recommended Products Summary
Engineering reference data for TDA5240 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TDA5235 | TDA5225 | TDA5230 |
|---|---|---|---|---|
| Package | PG-TSSOP-28 | PG-TSSOP-28 - same | PG-TSSOP-28 - same | PG-TSSOP-28 - same |
| Brand | Infineon | Infineon | Infineon | Infineon |
| Sensitivity (FSK) | -118 dBm typ. | -118 dBm typ. | -118 dBm typ. | [DATA_NEEDED] |
| Parallel Parameter Sets | 4 | 2 | 2 | [DATA_NEEDED] |
| Frequency Channels | Up to 12 | TDA5240 only (reduced) | TDA5240 only (reduced) | [DATA_NEEDED] |
| Modulation | ASK / FSK | ASK / FSK | ASK / FSK | ASK / FSK |
| Maximum Data Rate | 112 kcps | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Frequency Bands | 300-320 / 425-450 / 863-870 / 902-928 MHz | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Highest channel flexibility in family (vs TDA5235)
- Autonomous receive mode (vs TDA5225)
- Class-leading sensitivity (vs TDA5235)
Design Notes
The TDA5240 accepts a 3.3 V or 5 V supply per the Infineon datasheet, but RF performance parameters such as sensitivity and phase noise should be verified at the chosen rail in the electrical characteristics tables. Decouple AVDD pins with a combination of 100 nF ceramic placed within 2 mm of the pin plus a 1-10 uF bulk capacitor per supply domain. In automotive 5 V systems, add a series ferrite bead and a reverse-polarity/transient protection stage ahead of the receiver regulator, since load-dump and ISO pulses propagate along vehicle supply rails.
Keep the antenna matching network (typically a pi-network to 50 ohm) and crystal as close to the TDA5240 as possible, with a solid, uninterrupted ground plane directly beneath the RF section. Route the crystal traces short and shielded with ground guard rings to avoid pulling the reference oscillator. Separate the digital SPI lines from the RF front end; use vias to stitch the ground planes around the RF region. Follow the layout example in the SmartLEWIS RX datasheet application section, which shows the recommended TSSOP-28 land pattern and antenna feed arrangement.
When substituting family parts (TDA5235, TDA5225), remember the TDA5240-only features: 4 parallel parameter sets and up to 12 frequency channels do not exist on the reduced variants, so firmware that configures multiple parameter sets will fail on the substitutes. Also verify that firmware register maps match the exact device variant, and confirm the exact operating temperature range and current consumption figures in the manufacturer datasheet before releasing the power budget - do not assume values carried over from other SmartLEWIS parts.
Compliance Information
Distributor data labels the part as 'Automotive' grade (AiPCBA listing), but formal AEC-Q100 qualification status and RoHS/REACH declarations were not present in the provided data - verify on the Infineon product page.
