TDA5101 - 315MHz ASK/FSK RF Transmitter | Infineon
MPN: TDA5101 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.89 | $18.90 |
| 100 | $1.65 | $165.00 |
| 500 | $1.42 | $710.00 |
| 1,000 | $1.25 | $1,250.00 |
Drop-in alternatives for TDA5101 — 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:
TDA5100
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →TDA5101 Maximum Ratings & Electrical Characteristics
| Product Type | Single-chip ASK/FSK RF Transmitter |
| Frequency Band | 315 MHz |
| Modulation | ASK / FSK |
| Output Power | 5 dBm (at 3V) |
| Maximum Data Rate | 20 kbps |
| Channels per Band | Single channel |
| Supply Voltage | 2.5 V / 3.3 V |
| Antenna Type | PCB, Surface Mount Antenna |
| Package | PG-TSSOP-16 (0.173 inch, 4.40 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -25C to +85C |
| Integration Level | High integration, few external components required |
| Typical Applications | Remote keyless entry, telemetry, wireless control |
| Datasheet Publication Date | 2001-10-21 |
TDA5101 pg-tssop-16 (0.173 inch, 4.40 mm width) Pin Configuration Guide
Complete pinout information for TDA5101 (pg-tssop-16 (0.173 inch, 4.40 mm width) 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 TDA5101.
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
TDA5101 is suitable for 6 applications: Remote Keyless Entry (RKE) Transmitters, Garage Door Openers and Gate Controllers, Wireless Sensor and Telemetry Nodes, Home Automation and Security Transmitters, Toy and Consumer Remote Controls, Industrial Short-Range Telemetry.
Remote Keyless Entry (RKE) Transmitters
The TDA5101 fits remote keyless entry fobs because its 315 MHz carrier aligns with the North American RKE band and its 20 kbps maximum data rate comfortably carries rolling-code encoder frames that typically run at 1-10 kbps. With 5 dBm output power at a 3V supply, a small PCB loop antenna achieves typical fob-to-vehicle ranges of tens of meters, sufficient for lock/unlock and trunk release functions. Placed directly after a code-hopping encoder IC, the TDA5101 modulates the data stream via ASK, which keeps the receiver front-end cost low. Its few-external-component design and PG-TSSOP-16 footprint enable compact, coin-cell-powered fob layouts where board area and battery life dominate. Designers should budget peak transmit current against CR2032 cell internal resistance.
Recommended
Garage Door Openers and Gate Controllers
Garage-door and gate-remote systems in 315 MHz markets pair naturally with the TDA5101: the single-channel 315 MHz band, 20 kbps data rate, and ASK mode match the legacy security-code receivers used in this segment. The 5 dBm transmit power at 3V delivers the tens-of-meters outdoor range expected from a handheld remote, and the high level of integration means only a crystal, a few passives, and a PCB antenna are needed, keeping remote-unit cost minimal. Battery life is preserved because the transmitter draws current only during key presses; a 3V coin cell typically lasts years in low-usage remotes. Designers should follow the Infineon reference layout for crystal and matching-network placement to maintain carrier accuracy and radiation compliance.
Recommended
Wireless Sensor and Telemetry Nodes
The TDA5101 serves one-way wireless sensor nodes - temperature reporting, occupancy flags, metering pulses - where a unidirectional 315 MHz link at up to 20 kbps is sufficient. Its 2.5V/3.3V supply range allows direct connection to small primary cells or low-voltage regulated rails without a boost converter, simplifying node power design. ASK transmission from a PCB surface-mount antenna keeps the bill of materials to a handful of components, and the TSSOP-16 package suits compact sensor enclosures. Because nodes transmit short bursts infrequently, average current draw is dominated by the sensor and MCU, not the RF stage. Designers should implement proper power-up sequencing and verify duty-cycle compliance with regional 315 MHz band regulations for telemetry use.
Recommended
Home Automation and Security Transmitters
The TDA5101 fits wireless home-security and home-automation transmitters - door/window contacts, PIR trigger pendants, and wall-switch senders - operating in the 315 MHz band common in North American and Asian security systems. The 20 kbps data rate handles multi-bit status frames with addressing and CRC, while ASK modulation keeps receiver sensitivity budget simple. At 5 dBm output from a 3V supply, in-home coverage across typical residential floor plans is achievable with a compact PCB antenna, and the few-external-components architecture supports low-cost, high-volume sensor manufacturing. The TSSOP-16 surface-mount package and -25C to +85C operating range cover unheated garage and outdoor-adjacent installations. Designers should implement low-battery signaling in the data frame to avoid silent sensor failures.
Recommended
Toy and Consumer Remote Controls
The TDA5101 suits low-cost 315 MHz toy remotes and consumer control links: its high integration means the transmitter section costs only the IC, a crystal, and a few passives, which is critical at consumer price points. The 20 kbps rate is ample for command codes, and ASK operation allows the simplest possible receiver design at the toy end. Operation from 2.5V or 3.3V aligns with two- or three-cell battery packs, and the -25C to +85C temperature range covers typical consumer environments. The compact TSSOP-16 package enables small handheld remote PCBs. Designers should keep the PCB antenna away from the user's hand detuning zone per the Infineon layout guidance and verify band compliance for the destination market, since 315 MHz allocations vary by region.
Recommended
Industrial Short-Range Telemetry
For industrial one-way telemetry - machine status flags, limit-switch alarms, and pulse-counting meters - the TDA5101 offers a 315 MHz, 20 kbps, single-channel ASK link whose simplicity and few external components translate into robust, low-cost field units. The 5 dBm output at 3V, fed into a tuned PCB or wire antenna, achieves building-scale coverage, and the -25C to +85C operating range suits factory-floor and outdoor-mounted enclosures. Its FSK option is valuable where industrial RF noise degrades ASK links, improving immunity at the cost of a slightly more complex receiver. Because the part is obsolete, industrial users should secure last-time-buy stock or qualify the same-family TDA5100 platform with band-plan adjustments before committing new production.
Recommended
Recommended Products Summary
Engineering reference data for TDA5101 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TDA5100 |
|---|---|---|
| Package | PG-TSSOP-16 (4.40 mm width) | PG-TSSOP-16 - same |
| Brand | Infineon Technologies | Infineon Technologies |
| Frequency Band | 315 MHz | [DATA_NEEDED] |
| Modulation | ASK / FSK | ASK / FSK |
| Output Power (at 3V) | 5.0 dBm | [DATA_NEEDED] |
| Maximum Data Rate | 20 kbps | [DATA_NEEDED] |
| Supply Voltage | 2.5 V / 3.3 V | [DATA_NEEDED] |
| Operating Temperature | -25C to +85C | [DATA_NEEDED] |
| Lifecycle Status | Obsolete | [DATA_NEEDED] |
Key Differentiators
- Single-band 315 MHz optimization (vs TDA5100)
- High single-chip integration (vs TI/NXP multi-band transmitters (functional equivalents))
- Dual ASK/FSK modulation support (vs ASK-only low-cost transmitters)
Design Notes
Keep the crystal and its load capacitors as close to the TDA5101 crystal pins as possible, with short, direct traces and a solid ground plane underneath. Carrier accuracy is crystal-derived, so poor layout shifts the 315 MHz carrier and shrinks effective receiver bandwidth, directly reducing link range. Follow the Infineon datasheet reference layout for the antenna matching network and keep the PCB loop antenna area per the recommended geometry for the 315 MHz band.
Decouple the TDA5101 supply pin with a 100 nF ceramic capacitor placed within a few millimeters of the pin, plus bulk capacitance sized to handle transmit-mode current pulses from a coin cell. CR2032 cells have significant internal resistance; estimated: with 5 dBm output at 3V, transmit current is on the order of 10 mA class, so verify cell voltage sag stays above the 2.5V minimum during transmission. Reserve the battery with a small reservoir capacitor if long burst transmissions are used.
The TDA5101 is obsolete - before committing new production, secure last-time-buy stock or qualify the same-family TDA5100, noting that its band plan differs from 315 MHz and a redesign-level change may be needed. Also confirm the destination market's 315 MHz band regulations: duty-cycle and field-strength limits vary by region, and the 20 kbps maximum data rate must accommodate your encoder frame with preamble and synchronization overhead.
Compliance Information
Compliance status not stated in the provided verified web data; the part is a 2001-era product (datasheet published 2001-10-21) and is obsolete, so RoHS-compliant revisions may not exist. Verify with Infineon product discontinuation documentation.
