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ST25R3915-AQFT

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STMicroelectronics RFID ICs, QFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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ST25R3915-AQFT

STMicroelectronics · RFID ICs · QFN-32(5x5)

ST25R3915-AQFT from STMicroelectronics, in a QFN-32(5x5). 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 VDD_IO power_in Positive supply for peripheral communication, operating range 1.65 to 5.5 V.
2 CSO output Capacitive sensor output; pin is in the 3 V domain with an operating voltage range of -0.5 to 3.6 V.
3 VSP_D power_out Digital supply regulator output; pin is in the 3 V domain with an operating voltage range of -0.5 to 3.6 V.
4 XTO output Crystal oscillator output; supports a 13.56 or 27.12 MHz crystal with fast start-up.
5 XTI input Crystal oscillator input; supports a 13.56 or 27.12 MHz crystal, and the pin is limited to -0.5 to 3.6 V.
6 VSN_D power_in Digital ground, nominally 0 V.
7 VSP_A power_out Analog supply regulator output; pin is in the 3 V domain with an operating voltage range of -0.5 to 3.6 V.
8 VDD power_in External positive supply, operating range 2.4 to 5.5 V (absolute maximum 6.0 V).
9 VSP_RF power_out Supply regulator output for the antenna drivers; pin is in the 5 V domain with an operating voltage range of -0.5 to 5.5 V.
10 RFO1 output Antenna driver output 1 (differential or single-ended), with a driver current of 0 to 500 mA and a 5 V domain limit of -0.5 to 5.5 V.
11 RFO2 output Antenna driver output 2 (differential or single-ended), with a driver current of 0 to 500 mA and a 5 V domain limit of -0.5 to 5.5 V.
12 VSN_RF power_in Ground of the antenna drivers, nominally 0 V.
13 TRIM1_3 / NC unconnected Not connected on the ST25R3915; the TRIM antenna tuning input is available only on the ST25R3914.
14 TRIM2_3 / NC unconnected Not connected on the ST25R3915; the TRIM antenna tuning input is available only on the ST25R3914.
15 TRIM1_2 / NC unconnected Not connected on the ST25R3915; the TRIM antenna tuning input is available only on the ST25R3914.
16 TRIM2_2 / NC unconnected Not connected on the ST25R3915; the TRIM antenna tuning input is available only on the ST25R3914.
17 TRIM1_1 / NC unconnected Not connected on the ST25R3915; the TRIM antenna tuning input is available only on the ST25R3914.
18 TRIM2_1 / NC unconnected Not connected on the ST25R3915; the TRIM antenna tuning input is available only on the ST25R3914.
19 TRIM1_0 / NC unconnected Not connected on the ST25R3915; the TRIM antenna tuning input is available only on the ST25R3914.
20 TRIM2_0 / NC unconnected Not connected on the ST25R3915; the TRIM antenna tuning input is available only on the ST25R3914.
21 VSS power_in Ground and die substrate potential, 0 V.
22 RFI1 input Receiver input 1; RFI amplitude 0.150 to 3 Vpp for NFC receive, with 2.5 Vpp recommended in HF reader and NFC transmit modes.
23 RFI2 input Receiver input 2; RFI amplitude 0.150 to 3 Vpp for NFC receive, with 2.5 Vpp recommended in HF reader and NFC transmit modes.
24 AGD bidirectional Analog reference voltage; pin is in the 3 V domain with an operating voltage range of -0.5 to 3.6 V.
25 CSI input Capacitive sensor input; pin is in the 3 V domain with an operating voltage range of -0.5 to 3.6 V.
26 VSN_A power_in Analog ground, nominally 0 V.
27 IRQ output Interrupt request output; peripheral IO pin with an operating voltage range of -0.5 to 5.5 V.
28 MCU_CLK output Microcontroller clock output; peripheral IO pin with an operating voltage range of -0.5 to 5.5 V.
29 MISO tri_state Serial Peripheral Interface data output, tri-stateable; peripheral IO pin with an operating voltage range of -0.5 to 5.5 V.
30 MOSI input Serial Peripheral Interface data input; CMOS input with an operating voltage range of -0.5 to 5.5 V.
31 SCLK input Serial Peripheral Interface clock input; CMOS input with an operating voltage range of -0.5 to 5.5 V.
32 /SS input Serial Peripheral Interface enable, active low; CMOS input with an operating voltage range of -0.5 to 5.5 V.
33 VSS power_in Exposed pad: ground and die substrate potential, to be connected to VSS on the PCB.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package QFN-32(5x5)
Category RF And Wireless
Pins 33

CAD (KiCad official)

  • Symbol: ST25R3915-AQFT
  • Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • 3D model: QFN-32(5x5) (KiCad packages3D, STEP)
  • 3D model files: st25r3915-aqft-etched.step / st25r3915-aqft-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); st25r3915-aqft.step / st25r3915-aqft.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (128 pp, sha256 3a63adf1e0f82121, retrieved 2026-10-08, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF