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Ci522
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Nanjing Zhongke Microelectronics RFID ICs, QFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+53@@ -0,0 +1,53 @@+# Ci522++**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.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ci522.step` / `ci522.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nanjing Zhongke Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906588485144577) (50 pp, sha256 `b4ca45fff0896a1a`, retrieved 2026-09-18, tier: lcsc)+- **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](docs/ci522-datasheet.pdf)
page.jsonadded+195@@ -0,0 +1,195 @@+{+ "slug": "ci522",+ "version": "0.1.0",+ "type": "component",+ "description": "Nanjing Zhongke Microelectronics RFID ICs, QFN-16-EP(3x3). Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "rf and wireless",+ "ci522",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "ci522.kicad_sym",+ "ci522.kicad_mod",+ "ci522.glb",+ "ci522.step",+ "ci522.lbr",+ "docs/hero.png",+ "docs/ci522-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "Ci522",+ "manufacturer": "Nanjing Zhongke Microelectronics",+ "package": "QFN-16-EP(3x3)",+ "pin_count": 17,+ "category": "RF And Wireless",+ "subcategory": "RFID ICs",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906588485144577",+ "parts": {+ "symbol": "ci522.kicad_sym",+ "footprint": "ci522.kicad_mod",+ "model_3d": "ci522-etched.glb",+ "model_3d_plain": "ci522.glb",+ "model_3d_step": "ci522-etched.step",+ "model_3d_step_plain": "ci522.step",+ "lbr": "ci522.lbr"+ },+ "distributor_links": {+ "lcsc": "C2842464"+ },+ "pins": [+ {+ "number": "1",+ "name": "VDD1",+ "type": "power_in",+ "description": "Pad power supply"+ },+ {+ "number": "2",+ "name": "NRSTPD",+ "type": "input",+ "description": "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"+ },+ {+ "number": "3",+ "name": "VDD2",+ "type": "power_in",+ "description": "Floating power supply pin"+ },+ {+ "number": "4",+ "name": "TX1",+ "type": "output",+ "description": "Transmitter 1 delivers the modulated 13.56 MHz energy carrier"+ },+ {+ "number": "5",+ "name": "VDD3",+ "type": "power_in",+ "description": "Transmitter power supply: supplies the output stage of transmitters 1 and 2"+ },+ {+ "number": "6",+ "name": "TX2",+ "type": "output",+ "description": "Transmitter 2 delivers the modulated 13.56 MHz energy carrier"+ },+ {+ "number": "7",+ "name": "VDD4",+ "type": "power_in",+ "description": "Analog power supply"+ },+ {+ "number": "8",+ "name": "VMID",+ "type": "power_in",+ "description": "Internal reference voltage"+ },+ {+ "number": "9",+ "name": "RX",+ "type": "input",+ "description": "RF signal input"+ },+ {+ "number": "10",+ "name": "OSCIN",+ "type": "input",+ "description": "Crystal oscillator inverting amplifier input; also accepts externally generated clock input at fclk = 27.12 MHz"+ },+ {+ "number": "11",+ "name": "OSCOUT",+ "type": "output",+ "description": "Crystal oscillator inverting amplifier output"+ },+ {+ "number": "12",+ "name": "MISO",+ "type": "output",+ "description": "SPI master in, slave out"+ },+ {+ "number": "13",+ "name": "MOSI",+ "type": "input",+ "description": "SPI master out, slave in"+ },+ {+ "number": "14",+ "name": "SCK",+ "type": "input",+ "description": "SPI serial clock input"+ },+ {+ "number": "15",+ "name": "NSS",+ "type": "input",+ "description": "SPI chip select input"+ },+ {+ "number": "16",+ "name": "IRQ",+ "type": "output",+ "description": "Interrupt request output: indicates an interrupt event and can be configured as open-drain or push-pull"+ },+ {+ "number": "17",+ "name": "VSS",+ "type": "power_in",+ "description": "Ground: connection of heatsink pad on package underside"+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 50,+ "cost_usd": 0.261,+ "at": "2026-09-18T01:25:57"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906588485144577",+ "pages": 50,+ "sha256": "b4ca45fff0896a1a",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 17,+ "described": 17,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}