# CMT2300A-EQR

**HopeRF Micro electronics** · RF Transceiver ICs · QFN-16-EP(3x3)

CMT2300A-EQR from HopeRF Micro electronics, in a QFN-16-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RFIP | input | RF signal input positive terminal for low-noise amplifier receiver supporting frequency range 127 to 1020 MHz. |
| 2 | RFIN | input | RF signal input negative terminal for low-noise amplifier receiver supporting frequency range 127 to 1020 MHz. |
| 3 | PA | output | Power amplifier RF output providing transmit capability with adjustable output power from -20 dBm to +20 dBm in 1 dB steps. |
| 4 | AVDD | power_in | Analog power supply voltage input, operating voltage range 1.8 V to 3.6 V. |
| 5 | AGND | power_in | Analog ground reference connection. |
| 6 | DGND | power_in | Digital ground reference connection. |
| 7 | DVDD | power_in | Digital power supply voltage input, operating voltage range 1.8 V to 3.6 V. |
| 8 | GPIO3 | bidirectional | Configurable general-purpose I/O pin supporting clock output (CLKO), demodulated output (DOUT), modulation input (DIN), or data rate clock (DCLK) in TX/RX modes. |
| 9 | SCLK | input | SPI serial clock input with maximum frequency 5 MHz; data is transferred on clock falling edge. |
| 10 | SDIO | bidirectional | SPI bidirectional serial data line for register and FIFO access; input high threshold ≥0.8 VDD, input low threshold ≤0.2 VDD. |
| 11 | CSB | input | SPI chip select input for register access, active low; CSB and FCSB cannot be simultaneously low. |
| 12 | FCSB | input | SPI chip select input for FIFO access, active low; FCSB and CSB cannot be simultaneously low. |
| 13 | XI | input | Crystal oscillator input at 26 MHz or external reference clock input with peak-to-peak voltage 0.3 to 0.7 V, requiring 15 pF load capacitance. |
| 14 | XO | output | Crystal oscillator output at 26 MHz; load capacitance to ground must equal load capacitance at XI for 15 pF crystal load. |
| 15 | GPIO2 | bidirectional | Configurable general-purpose I/O pin supporting interrupt output (INT1, INT2), demodulated output (DOUT), modulation input (DIN), data rate clock (DCLK), or RF switch control (RF_SWT). |
| 16 | GPIO1 | bidirectional | Configurable general-purpose I/O pin supporting demodulated output (DOUT), modulation input (DIN), interrupt output (INT1, INT2), data rate clock (DCLK), or RF switch control (RF_SWT). |
| 17 | GND | power_in | Analog ground connection on exposed pad (EP); must be directly connected to ground plane. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HopeRF Micro electronics |
| Package | QFN-16-EP(3x3) |
| Category | RF And Wireless |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `CMT2300A-EQR`
- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`
- 3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `cmt2300a-eqr-etched.step` / `cmt2300a-eqr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cmt2300a-eqr.step` / `cmt2300a-eqr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [HopeRF Micro electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881961431535616) (44 pp, sha256 `f9f85ac13eaec1ee`, retrieved 2026-09-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cmt2300a-eqr-datasheet.pdf)