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CI523
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Nanjing Zhongke Microelectronics RFID ICs, TQFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+54@@ -0,0 +1,54 @@+# CI523++**Nanjing Zhongke Microelectronics** · RFID ICs · TQFN-16-EP(3x3)++CI523 from Nanjing Zhongke Microelectronics, in a TQFN-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 | PVDD power supply input (2.3V to 4.0V nominal); provides pin power supply to the chip |+| 2 | NRSTPD | input | Reset and power-down input; low level enables power-down mode (closes internal current and oscillator, disconnects input pins), rising edge triggers reset |+| 3 | VDD2 | unconnected | Floating pin; leave unconnected (not used in QFN16 variant) |+| 4 | TX1 | output | Transmitter 1 modulated carrier signal output for antenna driver |+| 5 | VDD3 | power_in | TVDD transmitter power supply (2.3V to 4.0V nominal); powers output stages of TX1 and TX2 |+| 6 | TX2 | output | Transmitter 2 modulated carrier signal output for antenna driver |+| 7 | VDD4 | power_in | AVDD analog power supply (2.3V to 4.0V nominal); provides power to analog circuit blocks |+| 8 | VMID | power_in | Internal reference voltage; requires bypass capacitor to ground for stability |+| 9 | RX | input | RF signal input from antenna tuning circuit; 13.56 MHz ISO/IEC 14443 A/B signals |+| 10 | OSCIN | input | Crystal oscillator inverting amplifier input or external 27.12 MHz clock input (fclk = 27.12 MHz) |+| 11 | OSCOUT | output | Crystal oscillator inverting amplifier output for 27.12 MHz crystal connection |+| 12 | MISO | output | SPI master input, slave output; data output from chip to SPI master (max 10 Mbit/s) |+| 13 | MOSI | input | SPI master output, slave input; data input from SPI master to chip (max 10 Mbit/s) |+| 14 | SCK | input | SPI serial clock input from master; max frequency 10 MHz |+| 15 | NSS | input | SPI chip select input (active low); must be held low during SPI transaction |+| 16 | IRQ | output | Interrupt request output indicating interrupt events; configurable as open-drain or CMOS push-pull via IRQPushPull bit |+| 17 | VSS | power_in | Chip ground connection including exposed metal pad at package bottom; primary ground reference (0V) |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nanjing Zhongke Microelectronics |+| Package | TQFN-16-EP(3x3) |+| Category | RF And Wireless |+| Pins | 17 |++## CAD (KiCad official)++- Symbol: `CI523`+- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`+- 3D model: TQFN-16-EP(3x3) (KiCad packages3D, STEP)+- 3D model files: `ci523-etched.step` / `ci523-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ci523.step` / `ci523.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/8588905543088291840) (46 pp, sha256 `64022a798c9b7ada`, 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](docs/ci523-datasheet.pdf)
page.jsonadded+197@@ -0,0 +1,197 @@+{+ "slug": "ci523",+ "version": "0.1.0",+ "type": "component",+ "description": "Nanjing Zhongke Microelectronics RFID ICs, TQFN-16-EP(3x3). Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "rf and wireless",+ "ci523",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "ci523.kicad_sym",+ "ci523.kicad_mod",+ "ci523.glb",+ "ci523.step",+ "ci523.lbr",+ "docs/hero.png",+ "docs/ci523-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "CI523",+ "manufacturer": "Nanjing Zhongke Microelectronics",+ "package": "TQFN-16-EP(3x3)",+ "pin_count": 17,+ "category": "RF And Wireless",+ "subcategory": "RFID ICs",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905543088291840",+ "parts": {+ "symbol": "ci523.kicad_sym",+ "footprint": "ci523.kicad_mod",+ "model_3d": "ci523-etched.glb",+ "model_3d_plain": "ci523.glb",+ "model_3d_step": "ci523-etched.step",+ "model_3d_step_plain": "ci523.step",+ "lbr": "ci523.lbr"+ },+ "distributor_links": {+ "lcsc": "C2833202"+ },+ "pins": [+ {+ "number": "1",+ "name": "VDD1",+ "type": "power_in",+ "description": "PVDD power supply input (2.3V to 4.0V nominal); provides pin power supply to the chip"+ },+ {+ "number": "2",+ "name": "NRSTPD",+ "type": "input",+ "description": "Reset and power-down input; low level enables power-down mode (closes internal current and oscillator, disconnects input pins), rising edge triggers reset"+ },+ {+ "number": "3",+ "name": "VDD2",+ "type": "unconnected",+ "description": "Floating pin; leave unconnected (not used in QFN16 variant)"+ },+ {+ "number": "4",+ "name": "TX1",+ "type": "output",+ "description": "Transmitter 1 modulated carrier signal output for antenna driver"+ },+ {+ "number": "5",+ "name": "VDD3",+ "type": "power_in",+ "description": "TVDD transmitter power supply (2.3V to 4.0V nominal); powers output stages of TX1 and TX2"+ },+ {+ "number": "6",+ "name": "TX2",+ "type": "output",+ "description": "Transmitter 2 modulated carrier signal output for antenna driver"+ },+ {+ "number": "7",+ "name": "VDD4",+ "type": "power_in",+ "description": "AVDD analog power supply (2.3V to 4.0V nominal); provides power to analog circuit blocks"+ },+ {+ "number": "8",+ "name": "VMID",+ "type": "power_in",+ "description": "Internal reference voltage; requires bypass capacitor to ground for stability"+ },+ {+ "number": "9",+ "name": "RX",+ "type": "input",+ "description": "RF signal input from antenna tuning circuit; 13.56 MHz ISO/IEC 14443 A/B signals"+ },+ {+ "number": "10",+ "name": "OSCIN",+ "type": "input",+ "description": "Crystal oscillator inverting amplifier input or external 27.12 MHz clock input (fclk = 27.12 MHz)"+ },+ {+ "number": "11",+ "name": "OSCOUT",+ "type": "output",+ "description": "Crystal oscillator inverting amplifier output for 27.12 MHz crystal connection"+ },+ {+ "number": "12",+ "name": "MISO",+ "type": "output",+ "description": "SPI master input, slave output; data output from chip to SPI master (max 10 Mbit/s)"+ },+ {+ "number": "13",+ "name": "MOSI",+ "type": "input",+ "description": "SPI master output, slave input; data input from SPI master to chip (max 10 Mbit/s)"+ },+ {+ "number": "14",+ "name": "SCK",+ "type": "input",+ "description": "SPI serial clock input from master; max frequency 10 MHz"+ },+ {+ "number": "15",+ "name": "NSS",+ "type": "input",+ "description": "SPI chip select input (active low); must be held low during SPI transaction"+ },+ {+ "number": "16",+ "name": "IRQ",+ "type": "output",+ "description": "Interrupt request output indicating interrupt events; configurable as open-drain or CMOS push-pull via IRQPushPull bit"+ },+ {+ "number": "17",+ "name": "VSS",+ "type": "power_in",+ "description": "Chip ground connection including exposed metal pad at package bottom; primary ground reference (0V)"+ }+ ],+ "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": [+ "extractor flagged: Pin 3 (VDD2) has unusual specification: labeled as type P (Power) with description '悬空' (floating/un"+ ],+ "pages_sent": 46,+ "cost_usd": 0.3019,+ "at": "2026-09-22T04:14:13"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905543088291840",+ "pages": 46,+ "sha256": "64022a798c9b7ada",+ "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]"+ }+}