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Si512

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Nanjing Zhongke Microelectronics RFID ICs, QFN-32-EP(5x5). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Contents

README

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Si512

Nanjing Zhongke Microelectronics · RFID ICs · QFN-32-EP(5x5)

Si512 from Nanjing Zhongke Microelectronics, in a QFN-32-EP(5x5). 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 SDI input I2C bus serial data input.
2 PVDD power_in Pad power supply pin, 2.3 to 3.6 V.
3 DVDD power_in Digital power supply pin, 2.3 to 3.6 V.
4 DVSS power_in Digital ground pin.
5 PVSS power_in Pad power supply ground pin.
6 NRSTPD input Not reset and power down; LOW switches off oscillator and current sinks, positive edge initiates reset.
7 MFIN input Communication interface input accepting digital serial data stream.
8 MFOUT output Communication interface output delivering serial data stream.
9 SVDD power_in Power supply for MFIN/MFOUT pads, 2.3 to 3.6 V.
10 TVSS power_in Transmitter ground supplying output stage of TX1 and TX2.
11 TX1 output Transmitter 1 output delivering modulated 13.56 MHz energy carrier.
12 TVDD power_in Transmitter power supply for TX1 and TX2 output stage, 2.3 to 3.6 V.
13 TX2 output Transmitter 2 output delivering modulated 13.56 MHz energy carrier.
14 TVSS power_in Transmitter ground supplying output stage of TX1 and TX2.
15 AVDD power_in Analog power supply pin, 2.3 to 3.6 V.
16 VMID power_in Internal reference voltage output pin.
17 RX input Receiver input for RF field detection at 13.56 MHz.
18 AVSS power_in Analog ground pin.
19 AUX1 output Auxiliary output pin used for testing and monitoring.
20 AUX2 output Auxiliary output pin used for testing and monitoring.
21 OSCIN input Crystal oscillator input to inverting amplifier; accepts 27.12 MHz external clock.
22 OSCOUT output Crystal oscillator output from inverting amplifier.
23 IRQ output Interrupt request output signaling interrupt event to host controller.
24 SD/NSS/RX bidirectional Multiplexed pin: I2C SDA (serial data), SPI NSS (chip select), or UART RX (receive address) depending on interface type.
25 D1/ADR_5 bidirectional Multiplexed pin: test port D1 or I2C bus address bit 5 input depending on interface type.
26 D2/ADR_4 bidirectional Multiplexed pin: test port D2 or I2C bus address bit 4 input depending on interface type.
27 D3/ADR_3 bidirectional Multiplexed pin: test port D3 or I2C bus address bit 3 input depending on interface type.
28 D4/ADR_2 bidirectional Multiplexed pin: test port D4 or I2C bus address bit 2 input depending on interface type.
29 D5/ADR_1/SCK/DTRQ bidirectional Multiplexed pin: test port D5, I2C address bit 1, SPI serial clock, or UART handshake request depending on interface type.
30 D6/ADR_0/MOSI/MX bidirectional Multiplexed pin: test port D6, I2C address bit 0, SPI master-out-slave-in, or UART controller output depending on interface type.
31 D7/SCL/MISO/TX bidirectional Multiplexed pin: test port D7, I2C serial clock, SPI master-in-slave-out, or UART data output depending on interface type.
32 EA input External address input pin to configure I2C slave address at power-up or reset.
33 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Nanjing Zhongke Microelectronics
Package QFN-32-EP(5x5)
Category RF And Wireless
Pins 33

CAD (KiCad official)

  • Symbol: Si512
  • Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • 3D model: QFN-32-EP(5x5) (KiCad packages3D, STEP)
  • 3D model files: si512-etched.step / si512-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); si512.step / si512.glb are the bare package body.

Provenance

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

  • Datasheet: Nanjing Zhongke Microelectronics datasheet (134 pp, sha256 bf6bea380f15b758, retrieved 2026-09-17, 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