component
WK2212-IQNG
Public Made by Adomby adom
WEIKAI Interface - Specialized, QFN-32-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownWK2212-IQNG
WEIKAI · Interface - Specialized · QFN-32-EP(4x4)
WK2212-IQNG from WEIKAI, in a QFN-32-EP(4x4). 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 | OSCI | input | Crystal oscillator input; a 1M resistor must be connected in parallel with the crystal. |
| 2 | OSCO | output | Crystal oscillator output. |
| 3 | MP3 | bidirectional | Multi-function pin: CS chip select, active low, in 8-bit parallel mode; SSEL SPI chip select, active low, in SPI mode; IA1 IIC device address bit in IIC mode; IR infrared mode select in UART mode (IR=0 infrared, IR=1 normal UART, default high). |
| 4 | MP2 | bidirectional | Multi-function pin: WR write strobe, active low, in parallel mode; SCLK SPI clock input in SPI mode; SCL IIC clock input in IIC mode; MRX main-port UART receive in UART mode. |
| 5 | MP1 | bidirectional | Multi-function pin: RD read strobe, active low, in parallel mode; MOSI in SPI mode; IA0 IIC device address bit in IIC mode; MTX main-port UART transmit in UART mode. |
| 6 | MP0 | bidirectional | Multi-function pin: AD data/address select in parallel mode (AD=0 register address write, AD=1 register data write); MISO in SPI mode; SDA in IIC mode; NC in UART mode. |
| 7 | DAT7 | bidirectional | Parallel data bus bit 7 in parallel mode; usable as GPIO when the main interface is not parallel mode. |
| 8 | DAT6 | bidirectional | Parallel data bus bit 6 in parallel mode; usable as GPIO when the main interface is not parallel mode. |
| 9 | DAT5 | bidirectional | Parallel data bus bit 5 in parallel mode; usable as GPIO when the main interface is not parallel mode. |
| 10 | DAT4 | bidirectional | Parallel data bus bit 4 in parallel mode; usable as GPIO when the main interface is not parallel mode. |
| 11 | DAT3 | bidirectional | Parallel data bus bit 3 in parallel mode; usable as GPIO when the main interface is not parallel mode. |
| 12 | DAT2 | bidirectional | Parallel data bus bit 2 in parallel mode; usable as GPIO when the main interface is not parallel mode. |
| 13 | DAT1 | bidirectional | Parallel data bus bit 1 in parallel mode; usable as GPIO when the main interface is not parallel mode. |
| 14 | DAT0 | bidirectional | Parallel data bus bit 0 in parallel mode; usable as GPIO when the main interface is not parallel mode. |
| 15 | RSTN | input | Hardware reset input, active low. |
| 16 | VDD | power_in | Power supply, 2.5 V to 5.0 V operating voltage. |
| 17 | IRQ | output | Interrupt output, active low; an external pull-up resistor is recommended, typically 5.1 kΩ. |
| 18 | CTS2 | input | Sub-channel 2 clear-to-send input, active low; CTS2=0 indicates the external UART is ready to receive data from the WK2212. |
| 19 | TX2 | output | Sub-channel 2 UART serial data output. |
| 20 | RX2 | input | Sub-channel 2 UART serial data input. |
| 21 | RTS2 | output | Sub-channel 2 request-to-send output, active low; signals the WK2212 sub-channel 2 is ready to receive. |
| 22 | GND | power_in | Ground. |
| 23 | MD0 | input | Main interface mode select together with MD1: MD1 MD0 = 00 SPI, 01 8-bit parallel bus, 10 IIC, 11 UART; internal pull-up, so floating selects UART (11). |
| 24 | MD1 | input | Main interface mode select together with MD0: MD1 MD0 = 00 SPI, 01 8-bit parallel bus, 10 IIC, 11 UART; internal pull-up, so floating selects UART (11). |
| 25 | CTS1 | input | Sub-channel 1 clear-to-send input, active low; CTS1=0 indicates the external UART is ready to receive data from the WK2212. |
| 26 | TX1 | output | Sub-channel 1 UART serial data output. |
| 27 | RX1 | input | Sub-channel 1 UART serial data input. |
| 28 | RTS1 | output | Sub-channel 1 request-to-send output, active low; signals the WK2212 sub-channel 1 is ready to receive. |
| 29 | NC | unconnected | No connection. |
| 30 | VDD | power_in | Power supply, 2.5 V to 5.0 V operating voltage. |
| 31 | NC | unconnected | No connection. |
| 32 | NC | unconnected | No connection. |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WEIKAI |
| Package | QFN-32-EP(4x4) |
| Category | Communication Interface Chip/UART/485/232 |
| Pins | 33 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | -0.5 | 5 | V | 42 | ||
| Input voltage | VI | -0.5 | 5.5 | V | 42 | ||
| Output voltage | VO | -0.5 | 5.5 | V | 42 | ||
| Operating temperature | TO | -40 | 85 | ℃ | 42 | ||
| Storage temperature | TSTG | -65 | 150 | ℃ | 42 | ||
| Operating temperature (ordering table for WK2212-IQNG) | -45 | 85 | ℃ | Ordering table 4.1: general industrial grade | 3 | ||
| Supply voltage | VCC | 2.3 | 2.7 | V | VCC=2.5V column; -40℃ to +85℃ | 42 | |
| Supply voltage | VCC | 3 | 3.6 | V | VCC=3.0V column; -40℃ to +85℃ | 42 | |
| Supply voltage | VCC | 4.5 | 5 | V | VCC=5.0V column; -40℃ to +85℃ | 42 | |
| Operating current | ICC | 0.8 | 2 | mA | 3.6864MHz crystal, no load; VCC=2.5V column; -40℃ to +85℃ | 42 | |
| Operating current | ICC | 1 | 2 | mA | 3.6864MHz crystal, no load; VCC=3.0V column; -40℃ to +85℃ | 42 | |
| Operating current | ICC | 2 | 3 | mA | 3.6864MHz crystal, no load; VCC=5.0V column; -40℃ to +85℃ | 42 | |
| Sleep current | ICCSL | 150 | uA | VCC=2.5V column; -40℃ to +85℃ | 42 | ||
| Sleep current | ICCSL | 200 | uA | VCC=3.0V column; -40℃ to +85℃ | 42 | ||
| Sleep current | ICCSL | 460 | uA | VCC=5.0V column; -40℃ to +85℃ | 42 | ||
| Input high voltage | VIH | 1.8 | V | VCC=2.5V column; -40℃ to +85℃ | 42 | ||
| Input high voltage | VIH | 2 | V | VCC=3.0V column; -40℃ to +85℃ | 42 | ||
| Input high voltage | VIH | 3.6 | V | VCC=5.0V column; -40℃ to +85℃ | 42 | ||
| Input low voltage | VIL | 0.6 | V | VCC=2.5V column; -40℃ to +85℃ | 42 | ||
| Input low voltage | VIL | 0.9 | V | VCC=3.0V column; -40℃ to +85℃ | 42 | ||
| Input low voltage | VIL | 1.1 | V | VCC=5.0V column; -40℃ to +85℃ | 42 | ||
| Input leakage current | IIL | -10 | 10 | uA | VI=5.0 or 0V; VCC=2.5V column; -40℃ to +85℃ | 42 | |
| Input capacitance | CI | 5 | pF | VCC=2.5V column; -40℃ to +85℃ | 42 | ||
| Output high voltage | VOH | 1.9 | V | IOH=3mA; VCC=2.5V column; -40℃ to +85℃ | 42 | ||
| Output high voltage | VOH | 2.4 | V | IOH=3mA; VCC=3.0V column; -40℃ to +85℃ | 42 | ||
| Output high voltage | VOH | 4.5 | V | IOH=3mA; VCC=5.0V column; -40℃ to +85℃ | 42 | ||
| Output low voltage | VOL | 0.4 | V | IOL=-3mA; VCC=2.5V column; -40℃ to +85℃ | 42 | ||
| Output low voltage | VOL | 0 | 0.4 | V | IOL=-3mA; VCC=5.0V column; -40℃ to +85℃ | 42 | |
| Output leakage current | IOL | -10 | 10 | uA | VCC=2.5V column; -40℃ to +85℃ | 42 | |
| Output capacitance | Co | 5 | pF | VCC=2.5V column; -40℃ to +85℃ | 42 | ||
| Crystal oscillator frequency | FOSI | 16 | MHz | VCC=2.5V column; -40℃ to +85℃ | 42 | ||
| Crystal oscillator frequency | FOSI | 24 | MHz | VCC=3.0V column; -40℃ to +85℃ | 42 | ||
| Crystal oscillator frequency | FOSI | 32 | MHz | VCC=5.0V column; -40℃ to +85℃ | 42 |
CAD (KiCad official)
- Symbol:
WK2212-IQNG - Footprint:
Package_DFN_QFN:QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm - 3D model: QFN-32-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
wk2212-iqng-etched.step/wk2212-iqng-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wk2212-iqng.step/wk2212-iqng.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WEIKAI datasheet (44 pp, sha256
4d238c36c2d19bb2, retrieved 2026-10-28, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).