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ST25R3911B-AQF
High performance HR reader/NFC initiator with 1.4W supporting VHBR and AAT, QFN32
Schematic Symbol
Pin Configuration (33 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | VDD_IO | power_in |
| 2 | CSO | output |
| 3 | VSP_D | power_out |
| 4 | XTO | output |
| 5 | XTI | passive |
| 6 | VSN_D | power_in |
| 7 | VSP_A | power_out |
| 8 | VDD | power_in |
| 9 | VSP_RF | power_out |
| 10 | RFO1 | output |
| 11 | RFO2 | output |
| 12 | VSN_RF | power_in |
| 13 | TRIM1_3 | passive |
| 14 | TRIM2_3 | passive |
| 15 | TRIM1_2 | passive |
| 16 | TRIM2_2 | passive |
| 17 | TRIM1_1 | passive |
| 18 | TRIM2_1 | passive |
| 19 | TRIM1_0 | passive |
| 20 | TRIM2_0 | passive |
| 21 | VSS | power_in |
| 22 | RFI1 | passive |
| 23 | RFI2 | passive |
| 24 | AGD | passive |
| 25 | CSI | passive |
| 26 | VSN_A | power_in |
| 27 | IRQ | output |
| 28 | MCU_CLK | output |
| 29 | MISO | output |
| 30 | MOSI | input |
| 31 | SCLK | input |
| 32 | /SS | input |
| 33 | EP | power_in |
Footprint
ConfirmedPackage_DFN_QFN/QFN-32-1EP_5x5mm_P0.5mm_EP3.6x3.6mm_ThermalVias
Pad Layout
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33
Pads (52)
| Number | Type |
|---|---|
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| 1 | smd |
| 2 | smd |
| 3 | smd |
| 4 | smd |
| 5 | smd |
| 6 | smd |
| 7 | smd |
| 8 | smd |
| 9 | smd |
| 10 | smd |
| 11 | smd |
| 12 | smd |
| 13 | smd |
| 14 | smd |
| 15 | smd |
| 16 | smd |
| 17 | smd |
| 18 | smd |
| 19 | smd |
| 20 | smd |
| 21 | smd |
| 22 | smd |
| 23 | smd |
| 24 | smd |
| 25 | smd |
| 26 | smd |
| 27 | smd |
| 28 | smd |
| 29 | smd |
| 30 | smd |
| 31 | smd |
| 32 | smd |
| 33 | thru hole |
| 33 | thru hole |
| 33 | thru hole |
| 33 | thru hole |
| 33 | thru hole |
| 33 | smd |
| 33 | smd |
| 33 | thru hole |
| 33 | thru hole |
| 33 | thru hole |
| 33 | thru hole |