component
Ci522
Public Made by Adomby adom
Nanjing Zhongke Microelectronics RFID ICs, QFN-16-EP(3x3). Datasheet-verified pinout, 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
markdownCi522
Nanjing Zhongke Microelectronics · RFID ICs · QFN-16-EP(3x3)
Ci522 from Nanjing Zhongke Microelectronics, in a QFN-16-EP(3x3). 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 | VDD1 | power_in | Pad power supply |
| 2 | NRSTPD | input | Reset and power-down input: enabled by a positive edge to reset, or enabled when LOW for power-down with internal current sinks switched off, oscillator inhibited, and input pins disconnected from the outside world |
| 3 | VDD2 | power_in | Floating power supply pin |
| 4 | TX1 | output | Transmitter 1 delivers the modulated 13.56 MHz energy carrier |
| 5 | VDD3 | power_in | Transmitter power supply: supplies the output stage of transmitters 1 and 2 |
| 6 | TX2 | output | Transmitter 2 delivers the modulated 13.56 MHz energy carrier |
| 7 | VDD4 | power_in | Analog power supply |
| 8 | VMID | power_in | Internal reference voltage |
| 9 | RX | input | RF signal input |
| 10 | OSCIN | input | Crystal oscillator inverting amplifier input; also accepts externally generated clock input at fclk = 27.12 MHz |
| 11 | OSCOUT | output | Crystal oscillator inverting amplifier output |
| 12 | MISO | output | SPI master in, slave out |
| 13 | MOSI | input | SPI master out, slave in |
| 14 | SCK | input | SPI serial clock input |
| 15 | NSS | input | SPI chip select input |
| 16 | IRQ | output | Interrupt request output: indicates an interrupt event and can be configured as open-drain or push-pull |
| 17 | VSS | power_in | Ground: connection of heatsink pad on package underside |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nanjing Zhongke Microelectronics |
| Package | QFN-16-EP(3x3) |
| Category | RF And Wireless |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
Ci522 - Footprint:
Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm - 3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files:
ci522-etched.step/ci522-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ci522.step/ci522.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nanjing Zhongke Microelectronics datasheet (50 pp, sha256
b4ca45fff0896a1a, retrieved 2026-09-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).