TDA5235XUMA1 - ASK/FSK Multi-Band RF Receiver | Infineon
MPN: TDA5235XUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
Drop-in alternatives for TDA5235XUMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TDA5240
β Drop-Inβ In Stock
$2.55 / Unit
View Datasheet βTDA5225
β Drop-Inπ Reference alternative (not in catalog)
TDA5235XUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | ASK/FSK RF Receiver (SmartLEWIS RX+) |
| Frequency Band 1 | 300 MHz to 320 MHz |
| Frequency Band 2 | 425 MHz to 450 MHz |
| Frequency Band 3 | 863 MHz to 870 MHz |
| Frequency Band 4 | 902 MHz to 928 MHz |
| Modulation | ASK, FSK |
| Sensitivity (FSK, typ) | -118 dBm |
| Sensitivity (per DigiKey listing) | -117 dBm |
| Data Rate | Up to 112 kcps |
| Supported Encodings | Manchester, bi-phase mark, bi-phase space, differential Manchester |
| Parallel Parameter Sets | 2 |
| Special Modes | Autonomous receive mode |
| Baseband Processing | Digital |
| Package | PG-TSSOP-28 |
| Mounting Type | Surface Mount |
| Target Applications | RKE, TPMS, remote control |
TDA5235XUMA1 pg-tssop-28 Pin Configuration Guide
Complete pinout information for TDA5235XUMA1 (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 TDA5235XUMA1.
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
TDA5235XUMA1 is suitable for 6 applications: Remote Keyless Entry (RKE), Tire Pressure Monitoring Systems (TPMS), Garage Door Openers and Gate Control, Home Automation and Smart Remote Controls, Security and Alarm Systems, Industrial Remote Control and Telemetry.
Remote Keyless Entry (RKE)
The TDA5235 fits RKE receiver modules because its -118 dBm typical FSK sensitivity maximizes link budget from the key fob transmitter, extending effective range or allowing lower transmit power for regulatory and battery-life benefits. In the receiver chain, the IC demodulates ASK/FSK carriers in the 300-320 MHz, 425-450 MHz, 863-870 MHz or 902-928 MHz bands and decodes bi-phase encodings such as Manchester on-chip via its digital baseband processor. Autonomous receive mode evaluates telegrams without waking the host MCU, cutting system current drain in always-listening door receivers. The 112 kcps maximum data rate comfortably covers standard RKE telegram timing. One PCB can serve multiple regions using its 2 parallel parameter sets, reducing SKU count for global vehicle platforms.
Recommended
Tire Pressure Monitoring Systems (TPMS)
TPMS wheel modules transmit short, infrequent telegrams on battery power, so the receiving side must extract maximum sensitivity to close the link. The TDA5235's -118 dBm typical FSK sensitivity in the 425-450 MHz band aligns directly with common TPMS carrier frequencies used in North America and Asia. Its autonomous receive mode offloads burst-telegram evaluation from the body-controller MCU, avoiding continuous polling and the associated current draw. Digital baseband processing with bi-phase mark/space decoding handles typical sensor telegram formats natively, while the 112 kcps rate covers both low-rate and accelerated (alert-mode) TPMS messages. The PG-TSSOP-28 package supports compact receiver placement near the antenna for best sensitivity, and the 2 parameter sets let one design cover multiple regional TPMS bands.
Recommended
Garage Door Openers and Gate Control
Fixed-installation remote-control receivers benefit from the TDA5235's combination of high sensitivity and low host burden. The -118 dBm typical FSK (about -116 dBm ASK) sensitivity compensates for fade margins caused by walls, vehicles and antenna placement in residential garages. Because the IC autonomously decodes Manchester and other bi-phase telegrams, a low-cost microcontroller can sleep until a valid rolling-code or fixed-code frame arrives, reducing both power consumption and susceptibility to host-generated noise that would otherwise degrade the noise floor. Coverage of 300-320 MHz and 390-class 425-450 MHz bands matches the majority of legacy opener carrier frequencies, and the dual parameter sets enable field switching between regional standards on the same PCB.
Recommended
Home Automation and Smart Remote Controls
Sub-GHz ASK/FSK links remain popular in smart-home sensors, wall switches and universal remotes because they penetrate walls better than 2.4 GHz. The TDA5235 covers the 863-870 MHz (Europe) and 902-928 MHz (North America) ISM bands with a single design, and its 2 parallel parameter sets allow in-field band selection. The -117 to -118 dBm sensitivity yields multi-room range from milliwatt-class transmitters. Autonomous receive mode is particularly valuable in battery-powered wall controllers: the receiver evaluates incoming telegrams itself and wakes the MCU only when needed, extending battery life dramatically compared to MCU-polled architectures. The digital baseband supports the bi-phase encodings used by common proprietary smart-home protocols, simplifying firmware integration.
Recommended
Security and Alarm Systems
Wireless alarm sensors (door contacts, PIR detectors, smoke detectors) require receivers that combine range, reliability and low false-alarm rates. The TDA5235's -118 dBm FSK sensitivity provides margin through building structures, while its on-chip digital baseband filters and decodes bi-phase telegrams, reducing bit errors that could cause nuisance triggers. Autonomous receive mode lets the alarm panel MCU sleep, improving both power consumption (important for panel battery backup) and electromagnetic noise, since a running processor is a local noise source that raises the effective receive threshold. Support for the 433 MHz (425-450 MHz) and 868 MHz (863-870 MHz) alarm-band allocations, plus 300-320 MHz for legacy markets, makes a single receiver PCB deployable across regions.
Recommended
Industrial Remote Control and Telemetry
Crane controllers, industrial gateways and short-range telemetry links use sub-GHz ASK/FSK channels for robustness in electromagnetically noisy factory environments. The TDA5235 contributes -118 dBm typical FSK sensitivity, FSK modulation (inherently more robust than ASK against amplitude interference), and a 112 kcps data rate sufficient for command and status telemetry frames. The four-band front end (300-320, 425-450, 863-870, 902-928 MHz) allows one hardware platform to be certified for European, North American and Asian industrial bands simply by loading different parameter-set configurations. Digital baseband processing with differential Manchester support integrates cleanly with standard industrial command formats, and autonomous operation offloads time-critical telegram handling from a potentially busy PLC companion processor.
Recommended
Recommended Products Summary
Engineering reference data for TDA5235XUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TDA5240 | TDA5225 |
|---|---|---|---|
| Package | PG-TSSOP-28 | PG-TSSOP-28 - same | PG-TSSOP-28 - same |
| Brand | Infineon | Infineon | Infineon |
| Frequency Bands | 300-320, 425-450, 863-870, 902-928 MHz | Multi-band SmartLEWIS RX family | Multi-band SmartLEWIS RX family |
| Modulation | ASK, FSK | ASK, FSK | ASK, FSK |
| Sensitivity (FSK, typ) | -118 dBm | -118 dBm | [DATA_NEEDED] |
| Data Rate | Up to 112 kcps | [DATA_NEEDED] | [DATA_NEEDED] |
| Parallel Parameter Sets | 2 | 4 | [DATA_NEEDED] |
| Frequency Channels | Not specified (TDA5240-only feature per family brochure) | Up to 12 | Not specified |
| Unit Price (qty 1) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Four-band coverage in one design (vs TDA5225)
- Autonomous receive mode (vs Conventional MCU-polled receivers)
- Cost-optimized vs TDA5240 (vs TDA5240)
Design Notes
The -118 dBm typical FSK sensitivity quoted in the Infineon family brochure is measured with a properly matched RF front end. Dedicate a controlled-impedance 50-ohm trace from the antenna pin to the matching network, keep the LNA input path short, and place the crystal and its load capacitors away from the PLL and switching circuitry. Validate sensitivity on your own PCB with a conducted measurement, since layout parasitics commonly cost 2-3 dB versus datasheet figures.
Use the autonomous receive mode to its full advantage: configure the TDA5235 with the desired parameter set and telegram criteria, then let the host MCU sleep and only wake on valid-message interrupt. Infineon notes this feature improves sensitivity and reduces system power by keeping the noisy, power-hungry host processor off during listening periods. Size the supply decoupling (100 nF ceramic at each supply pin plus bulk capacitance) for the receiver's transmit-burst-free, continuous-RX worst case.
The TDA5235 supports 2 parallel parameter sets, not the 4 sets and 12 channels available on the TDA5240 - do not copy TDA5240 configuration code unchanged. Bi-phase encoding selection (Manchester, bi-phase mark/space, differential Manchester) must match the transmitter exactly or frames will be silently discarded. Also confirm regional regulatory band edges: the 425-450 MHz and 902-928 MHz ranges cover multiple regulatory allocations with different duty-cycle and power limits.
Compliance Information
Compliance status not stated in the provided verified web data; confirm on the official Infineon product page for TDA5235.
