SSP1922

@@ -0,0 +1,72 @@+# SSP1922++**Shanghai Siproin Microelectronics** · Position Sensor · QFN-32-EP(5x5)++SSP1922 from Shanghai Siproin 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 | XIN | input | High-speed oscillator driver input (2-8 MHz ceramic/crystal). Tie to GND if unused. |+| 2 | XOUT | output | High-speed oscillator driver output. Leave floating if unused. |+| 3 | VIO | power_in | I/O supply voltage, 2.5 V to 3.6 V. Must equal Vcc for correct operation. |+| 4 | GND | power_in | Ground reference. Connect to a solid ground plane. |+| 5 | FIRE_UP | output | Fire pulse generator output 1 (upstream). Drives ultrasonic transducer with up to 48 mA, Rdson ~4 Ω. |+| 6 | FIRE_DOWN | output | Fire pulse generator output 2 (downstream). Drives ultrasonic transducer with up to 48 mA, Rdson ~4 Ω. |+| 7 | FIRE_IN | input | 'Sing-around' signal input terminal for continuous ultrasonic measurement. Tie to GND if unused. |+| 8 | INTN | output | Interrupt flag output, LOW active. 4 mA drive. Cleared by rising edge of the first SCK. |+| 9 | SSN | input | SPI slave select input, LOW active. Required for 4-wire SPI operation. |+| 10 | SCK | input | SPI serial clock input. Up to 20 MHz at Vio = 3.3 V (15 MHz at Vio = 2.5 V). |+| 11 | SI | input | SPI serial data input (MOSI). MSB-first byte transfers. |+| 12 | SO | output | SPI serial data output (MISO). Drives low when SPI bus is free (non-tristate). |+| 13 | RSTN | input | Reset input, LOW active. After power-on reset wait ≥500 µs before starting the analog section. |+| 14 | VCC | power_in | Core supply voltage, 2.5 V to 3.6 V. Must equal Vio. |+| 15 | CLK32OUT | output | 32 kHz clock generator output. Leave n.c. if not used. |+| 16 | CLK32IN | input | 32 kHz clock generator input (crystal / external clock). Tie to GND if unused. |+| 17 | SENSET | input | Sense input for temperature measurement (Schmitt trigger). Tie to GND if unused. |+| 18 | LOADT | output | Load output for temperature measurement (24 mA drive). Leave n.c. if unused. |+| 19 | PT4 | output | Port 4 temperature measurement (RTD drive, >96 mA open drain). |+| 20 | PT3 | output | Port 3 temperature measurement (RTD drive, >96 mA open drain). |+| 21 | GND | power_in | Ground reference. Connect to a solid ground plane. |+| 22 | VIO | power_in | I/O supply voltage, 2.5 V to 3.6 V (second Vio pin, must equal Vcc). |+| 23 | PT2 | output | Port 2 temperature measurement (RTD drive, >96 mA open drain). |+| 24 | PT1 | output | Port 1 temperature measurement (RTD drive, >96 mA open drain). |+| 25 | EN_STOP2 | input | Enable pin for STOP input 2, HIGH active. Tie to Vio if unused / always enabled. |+| 26 | EN_STOP1 | input | Enable pin for STOP input 1, HIGH active. Tie to Vio if unused / always enabled. |+| 27 | STOP2 | input | TDC stop input 2 (analog frontend via ~200 Ω switch). Tie to GND if unused. |+| 28 | GND | power_in | Ground reference. Connect to a solid ground plane. |+| 29 | VCC | power_in | Core supply voltage (second Vcc pin), 2.5 V to 3.6 V. |+| 30 | STOP1 | input | TDC stop input 1 (analog frontend via ~200 Ω switch). Tie to GND if unused. |+| 31 | START | input | TDC start input. Tie to GND if unused. |+| 32 | EN_START | input | Enable pin for START input, HIGH active. Tie to Vio if unused / always enabled. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shanghai Siproin Microelectronics |+| Package | QFN-32-EP(5x5) |+| Category | Sensor |+| Pins | 32 |++## Ordering variants++- `SSP1922`+- `SSP1922P`++## CAD (KiCad official)++- Symbol: `SSP1922`+- Footprint: `Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm`+- 3D model: QFN-32-EP(5x5) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Shanghai Siproin Microelectronics datasheet](docs/ssp1922-datasheet.pdf) (47 pp, sha256 `e322d1593761f7b8`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ssp1922-datasheet.pdf)

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