Yuan-T4A 433.92 MHz ASK/OOK Transmitter Module

Yuan-T4A transmitter module photographed against a centimeter scale

100–500 · MOQ 100US$0.95per module

501–999US$0.80per module

1,000+ · Volume orderRequest quoteFor production quantities

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Typical applications

For low-power ASK/OOK transmitters.

Use with an encoder IC or MCU GPIO that generates the required pulse protocol.

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Remote controls

Compact handheld and key-fob transmitters.

⌂

Smart home

Wireless switches and home-appliance controls.

♢

Doorbells

ASK/OOK trigger transmission for receivers.

Alarm transmitters

Short data-pulse links for alarm and security triggers.

Transmission behavior

DAT pulses control the RF carrier.

Yuan-T4A is a transmitter module, not a UART module and not a protocol decoder.

Encoder IC or MCUDigital pulse outputDAT

→433.92 MHz
ASK/OOK transmission

Compatible receiverDecoding is receiver-sideRF link

Protocol boundary: DAT high/low transitions control ASK/OOK transmission. The module does not decode address codes, key values, or UART text data.

Frequency433.92 MHz

ModulationASK/OOK

InputDAT

Supply2.0–5.5 V

Power10 dBm*

Current9 mA*

Data rate0.1–9.6 kbps

AntennaIntegrated PCB

Application boundaries

Check level, protocol and antenna clearance.

Final range and stability depend on the complete transmitter, receiver and installation.

Input-level boundary

DAT is a 3 V-level input, recommended range 2.2–3.6 V.

Use a 22 kΩ series resistor for 3.6–5 V outputs.

Use a 51 kΩ series resistor for 5–12 V outputs.

RF boundary

Do not place copper, routing or large metal below the PCB antenna.

Keep batteries, spring contacts and enclosure metal away from the antenna area.

Verify the final enclosure, battery and matched receiver before mass production.

* Test conditions: 10 dBm output power and 9 mA operating current are typical values at 3 V; current is specified at 40% modulation duty cycle.

Technical specifications

Confirmed selection data for Yuan-T4A.

The released Yuan-T4A Datasheet V1.7 remains the authority for final circuit and layout decisions.

Operating frequency433.92 MHz · selected according to ordered frequency

Operating voltage2.0–5.5 V · 3 V typical

ModulationASK/OOK · DAT input modulation

Output power10 dBm typical at 3 V

Operating current9 mA typical at 3 V, 40% duty cycle

Data rate0.1–9.6 kbps

Frequency deviation±0.1 MHz typical

DAT input2.2–3.6 V · 3 V-level input

Antenna impedance50 Ω integrated PCB antenna system

Operating temperature−40 to 85 °C

Pin assignment

Four module connections

DAT: Digital modulation-data input from encoder IC or MCU output.
VCC: Positive supply; 3 V recommended with decoupling and filtering.
GND: System ground.
ANT: Integrated module PCB antenna area; keep clear of copper and metal.

Evaluation

Prove the transmitter system

1 · ConnectConnect VCC, GND and DAT; keep DAT low when idle.
2 · Generate pulsesUse an encoder IC or MCU timer output for the required protocol.
3 · Match receiverConfirm compatible encoding and receiver settings.
4 · Validate assemblyTest battery, enclosure, antenna clearance and final orientation.

Downloads

Technical file for evaluation and design-in.

Yuan-T4A Datasheet V1.7

Download Datasheet ↓

Can DAT transmit UART text data?

No. DAT is a digital ASK/OOK modulation input; use an encoder IC or MCU pulse generation for the target protocol.

How should a 5 V MCU output connect?

For a 3.6–5 V output, use the datasheet-recommended 22 kΩ series resistor and verify the final input level.

Does the module decode the remote-control protocol?

No. Address code, key value and repeat-frame rules belong to the encoder or MCU and compatible receiver.

How should I place the antenna area?

Keep copper, routing, metal, batteries and spring contacts away from the integrated PCB antenna area.

Purchase options

Start with modules or a development kit.

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