# CMT2210LS-ESR

**HopeRF Micro electronics** · RF Transceiver ICs · SOIC-8

CMT2210LS-ESR from HopeRF Micro electronics, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground reference pin for the receiver, per the pin table. |
| 2 | RFIN | input | RF signal input to the chip's LNA; the datasheet states a 50 Ω match needs only one low-cost inductor and one capacitor (L1, C1). |
| 3 | VDD | power_in | Power supply input; the recommended operating supply range is 1.8 V to 3.6 V. |
| 4 | NC | unconnected | No connection; leave floating. |
| 5 | DOUT | output | Demodulated received data output to the external MCU. |
| 6 | SDN | input | Chip shutdown control input: pull low to enable receiver operation and pull high to turn the receiver off. |
| 7 | NC | unconnected | No connection; leave floating. |
| 8 | XIN | input | Crystal oscillator input or external reference clock input; an external clock must be AC-coupled with 0.3 V to 0.7 V peak-to-peak amplitude. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HopeRF Micro electronics |
| Package | SOIC-8 |
| Category | RF And Wireless |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating supply voltage | VDD | 1.8 |  | 3.6 | V |  | 5 |
| Operating temperature | TOP | -40 |  | 85 | ℃ |  | 5 |
| Supply voltage (absolute maximum) | VDD | -0.3 |  | 3.6 | V |  | 5 |
| Interface voltage (absolute maximum) | VIN | -0.3 |  |  | V |  | 5 |
| Junction temperature (absolute maximum) | TJ | -40 |  | 125 | ℃ |  | 5 |
| Storage temperature (absolute maximum) | TSTG | -50 |  | 150 | ℃ |  | 5 |
| Soldering temperature (absolute maximum) | TSDR |  |  | 255 | ℃ | 持续至少 30 秒 | 5 |
| ESD rating, human body model |  | -2 |  | 2 | kV | 人体模型(HBM) | 5 |
| Latch-up current |  | -100 |  | 100 | mA | @ 85 ℃ | 5 |
| Data rate | DR | 1 |  | 5 | kbps |  | 6 |
| Crystal frequency accuracy |  | -20 |  | 20 | ppm |  | 6 |

## CAD (KiCad official)

- Symbol: `CMT2210LS-ESR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `cmt2210ls-esr-etched.step` / `cmt2210ls-esr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cmt2210ls-esr.step` / `cmt2210ls-esr.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/8586196397774786560) (18 pp, sha256 `cf249986fa453d93`, retrieved 2026-10-19, 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 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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/cmt2210ls-esr-datasheet.pdf)