# MS5351M

**Hangzhou Ruimeng Tech** · Clock Generators, PLLs, Frequency Synthesizers · MSOP-10

MS5351M from Hangzhou Ruimeng Tech, in a MSOP-10. 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 | VDD | power_in | Internal core circuit supply. Recommended 2.7 V to 3.3 V (typ 3.0 V); absolute max -0.5 V to 3.6 V. Decouple locally. |
| 2 | XA | input | External crystal input pin. Connects to one terminal of a 25 MHz or 27 MHz crystal (CL 6-12 pF, ESR <=150 Ω). Input voltage range -0.3 V to 1.1 V. |
| 3 | XB | input | External crystal input pin. Connects to the other terminal of the 25 MHz or 27 MHz crystal. Input voltage range -0.3 V to 1.1 V. |
| 4 | SCL | input | I2C clock input. Requires an external pull-up resistor of at least 1 kΩ to VDDO. Supports 100 kbps standard and 400 kbps fast mode. |
| 5 | SDA | bidirectional | I2C data input/output (open-drain). Requires an external pull-up resistor of at least 1 kΩ to VDDO. Supports 100 kbps standard and 400 kbps fast mode. |
| 6 | CLK2 | output | Output clock channel 2. Programmable frequency from 2.5 kHz to 200 MHz. Output impedance ~50 Ω at 3.3 V VDDO high-drive; drive up to 5 mA. |
| 7 | VDDO | power_in | Output stage supply. Independent from VDD; supports 1.8 V, 2.5 V, or 3.3 V nominal (abs max -0.5 V to 3.8 V) to set output logic swing. |
| 8 | GND | power_in | Reference ground for all supplies and signal returns. |
| 9 | CLK1 | output | Output clock channel 1. Programmable frequency from 2.5 kHz to 200 MHz. Output impedance ~50 Ω at 3.3 V VDDO high-drive; drive up to 5 mA. |
| 10 | CLK0 | output | Output clock channel 0. Programmable frequency from 2.5 kHz to 200 MHz. Output impedance ~50 Ω at 3.3 V VDDO high-drive; drive up to 5 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Hangzhou Ruimeng Tech |
| Package | MSOP-10 |
| Category | Clock/Timing |
| Pins | 10 |

## Ordering variants

Same part, different packaging or reel option.

- `MS5351M`

## CAD (KiCad official)

- Symbol: `MS5351M`
- Footprint: `Package_SO:MSOP-10_3x3mm_P0.5mm`
- 3D model: MSOP-10 (KiCad packages3D, STEP)
- 3D model files: `ms5351m-etched.step` / `ms5351m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ms5351m.step` / `ms5351m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Hangzhou Ruimeng Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588894580762677249) (11 pp, sha256 `d73062cbbb8e9efa`, retrieved 2026-08-17, 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:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ms5351m-datasheet.pdf)