The document describes a product with specific features and characteristics.
The TDL-9923 is a high‑frequency receive module that uses imported SMD components, a 6.5 GHz transistor and high‑Q inductors. It offers high sensitivity, low power consumption and is suited for anti‑theft systems, industrial remote‑control, telemetry, and household appliance remote control.
Key technical parameters include a 3.0 VDC ±0.5 V supply, ≤300 µA current draw, super‑regeneration operation, OOK/ASK modulation, 250‑450 MHz frequency range, 2 MHz bandwidth, sensitivity better than –105 dBm, and TTL‑level output. Antenna length, stable power, and MCU clock below 4 MHz are important for optimal performance. This manual is written in Chinese.
| Working voltage | 3.0 VDC ± 0.5 V |
|---|---|
| Working current | ≤ 300 µA |
| Operating principle | Super‑regeneration |
| Modulation method | OOK/ASK |
| Frequency range | 250 MHz – 450 MHz |
| Bandwidth | 2 MHz |
| Sensitivity | Better than –105 dBm (50 Ω) |
| Transmission rate | < 5 kbps |
| Output signal | TTL level transparent transmission |
| Antenna length | 24 cm (315 MHz), 18 cm (433.92 MHz) |
Use a 24 cm antenna for 315 MHz operation and an 18 cm antenna for 433.92 MHz operation.
The MCU clock frequency should be below 4 MHz, and the crystal should be placed as far as possible from the RF module.
The supply voltage must be stable with low ripple; multi‑stage filtering with inductors, ferrite beads, and capacitors is recommended.