SIT1040T

@@ -0,0 +1,47 @@+# SIT1040T++**SIT** · CAN Controllers · SO-8++SIT1040T from SIT, in a SO-8. 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 | TXD | input | Transmit data input from the CAN protocol controller. Drives the bus dominant when low and recessive when high. 3.3 V / 5 V logic compatible; VIH ≥ 2 V, VIL ≤ 0.8 V. Internal pull-up leaves TXD in the recessive state when floating (TXD_O = H). |+| 2 | GND | power_in | Ground / device reference. All voltages are referenced to this pin. |+| 3 | VCC | power_in | Supply voltage input, nominal 5 V (operating range 4.5 V to 5.5 V, absolute max -0.3 V to +6 V). Should be decoupled to GND with a local bypass capacitor. |+| 4 | RXD | output | Receive data output to the CAN protocol controller. Reports the bus state: LOW when the bus is dominant, HIGH when recessive. Push-pull output; VOH ≥ 4 V @ IO = -2 mA, VOL ≤ 0.4 V @ IO = 2 mA. |+| 5 | SPLIT | output | Common-mode stabilization output, nominally VCC/2 (0.3·VCC to 0.7·VCC for |IO| < 500 µA). Intended to be tied to the center tap of a split termination network to stabilize the bus common-mode voltage and improve EMC. |+| 6 | CANL | bidirectional | Low-level CAN bus line. Driven low in the dominant state and biased to ~VCC/2 in the recessive state. Rated -40 V to +40 V continuous, ±200 V transient; ±8 kV HBM ESD. |+| 7 | CANH | bidirectional | High-level CAN bus line. Driven high in the dominant state and biased to ~VCC/2 in the recessive state. Rated -40 V to +40 V continuous, ±200 V transient; ±8 kV HBM ESD. |+| 8 | STB | input | Standby mode control input. STB = 0 selects normal (high-speed) operation; STB = 1 selects low-power standby (~5 µA typical) with bus wake-up capability. VIH ≥ 2.0 V, VIL ≤ 0.8 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | SIT |+| Package | SO-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `SIT1040TT`++## CAD (KiCad official)++- Symbol: `SIT1040T`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SO-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [SIT datasheet](docs/sit1040t-datasheet.pdf) (17 pp, sha256 `8da36b80cd179b04`, 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/sit1040t-datasheet.pdf)

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