# WS490H

**wisesun** · RF Transceiver ICs · SOP-8

WS490H from wisesun, in a SOP-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 pin for the receiver (table 1: 接地管脚). |
| 2 | ANT | input | RF signal input pin for the 315/433 MHz ASK/OOK antenna, fed through the external matching network shown in the typical circuits. |
| 3 | VDD | power_in | Supply pin, rated DC 2.0 V to 5.5 V in operating conditions, with an absolute maximum of -0.3 V to 5.5 V. |
| 4 | NC | unconnected | No internal connection; leave floating (悬空). |
| 5 | DO | output | Demodulated digital data output; it is driven low when the chip is in shutdown (SHUT high) and carries the demodulated signal in normal operation. |
| 6 | SHUT | input | Operating-mode select: tie to VDD for shutdown mode (about 0.1 µA, DO low) and to GND for normal receive mode. |
| 7 | NC | unconnected | No internal connection; leave floating (悬空). |
| 8 | RO | input | External crystal connection for the internal Colpitts reference oscillator, with crystal frequency set by FOSC = FRF/(32+1.1/12), e.g. 13.52127 MHz for 433.92 MHz. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | wisesun |
| Package | SOP-8 |
| Category | RF And Wireless |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `WS490H`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ws490h-etched.step` / `ws490h-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ws490h.step` / `ws490h.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [wisesun datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602938571376369664) (7 pp, sha256 `89e19693e2df41c3`, retrieved 2026-10-09, 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/ws490h-datasheet.pdf)