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WK2204-IQNG

Public Made by Adom

by adom

WEIKAI Interface - Specialized, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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WK2204-IQNG

WEIKAI · Interface - Specialized · QFN-24-EP(4x4)

WK2204-IQNG from WEIKAI, in a QFN-24-EP(4x4). 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 OSCI input Crystal oscillator input; requires parallel 1MΩ startup resistor with oscillator.
2 OSCO output Crystal oscillator output.
3 MP3 bidirectional Multifunction pin: SSEL (SPI chip select, active low) in SPI mode, IA1 (IIC device address high) in IIC mode, or IR (UART infrared mode: 0=infrared, 1=normal UART, default high) in UART mode.
4 MP2 bidirectional Multifunction pin: SCLK (SPI clock input) in SPI mode, SCL (IIC clock input) in IIC mode, or MRX (UART main port receive) in UART mode.
5 MP1 bidirectional Multifunction pin: MOSI (SPI slave data input) in SPI mode, IA0 (IIC device address low) in IIC mode, or MTX (UART main port transmit) in UART mode.
6 MP0 bidirectional Multifunction pin: MISO (SPI slave data output) in SPI mode, SDA (IIC data line) in IIC mode, or NC (no connection) in UART mode.
7 RTS4 output Sub-channel 4 Request To Send output, active low; indicates receive ready and used for RS-485 automatic transceiver control.
8 RX4 input Sub-channel 4 serial data input.
9 TX4 output Sub-channel 4 serial data output.
10 CTS4 input Sub-channel 4 Clear To Send input, active low; indicates connected UART is ready to receive data.
11 RSTN input Hardware reset input, active low.
12 IRQ output Interrupt output signal, active low; external pull-up resistor (5.1kΩ typical) recommended.
13 CTS2 input Sub-channel 2 Clear To Send input, active low; indicates connected UART is ready to receive data.
14 TX2 output Sub-channel 2 serial data output.
15 RX2 input Sub-channel 2 serial data input.
16 RTS2 output Sub-channel 2 Request To Send output, active low; indicates receive ready and used for RS-485 automatic transceiver control.
17 GND power_in Power ground.
18 MD0 input Main interface mode selection bit 0 (MD1MD0: 00=SPI, 10=IIC, 11=UART); internal pull-up circuit, defaults high.
19 MD1 input Main interface mode selection bit 1 (MD1MD0: 00=SPI, 10=IIC, 11=UART); internal pull-up circuit, defaults high.
20 TX1 output Sub-channel 1 serial data output.
21 RX1 input Sub-channel 1 serial data input.
22 TX3 output Sub-channel 3 serial data output.
23 RX3 input Sub-channel 3 serial data input.
24 VCC power_in Power supply input, operating range 2.0V to 3.6V.
25 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer WEIKAI
Package QFN-24-EP(4x4)
Category Interface
Pins 25

CAD (KiCad official)

  • Symbol: WK2204-IQNG
  • Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm
  • 3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: wk2204-iqng-etched.step / wk2204-iqng-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); wk2204-iqng.step / wk2204-iqng.glb are the bare package body.

Provenance

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

  • Datasheet: WEIKAI datasheet (42 pp, sha256 6f7a3ea82e2ab396, retrieved 2026-09-22, 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