component
SIT1040QT
Public Unreviewedby Ray
SIT CAN Controllers, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSIT1040QT
SIT · CAN Controllers · SOP-8
SIT1040QT from SIT, in a SOP-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 controller. Internally pulled to VCC (open-state logic high); a dominant TXD held low longer than t_dom (300-700 µs) triggers the dominant time-out and forces the driver recessive. VIH ≥ 2 V, VIL ≤ 0.8 V. |
| 2 | GND | power_in | Ground supply / reference for all voltages. On the DFN3*3-8 package, the exposed back pad is internally tied to GND and should be soldered to the PCB ground for improved heat dissipation. |
| 3 | VCC | power_in | 5 V supply voltage (operating range 4.75-5.25 V, absolute max 6 V). Typical standby ICC = 5 µA; dominant ICC ≈ 38 mA (60 Ω load). |
| 4 | RXD | output | Receive data output to the CAN controller; reads back the differential state of the CAN bus. Push-pull CMOS output: VOH ≥ 4 V at IO = -2 mA, VOL ≤ 0.4 V at IO = 2 mA. Low = dominant, High = recessive. |
| 5 | SPLIT | output | Common-mode stabilization output, nominally VCC/2 (0.3·VCC to 0.7·VCC for |
| 6 | CANL | bidirectional | Low-level CAN bus line. Bus fault tolerant from -40 V to +40 V. In dominant state driven to ~1.5 V; recessive state biased to ~0.5·VCC. Differential input resistance 30-80 kΩ. |
| 7 | CANH | bidirectional | High-level CAN bus line. Bus fault tolerant from -40 V to +40 V. In dominant state driven to ~3.5 V; recessive state biased to ~0.5·VCC. Differential input resistance 30-80 kΩ. |
| 8 | STB | input | Standby mode control input. Low (or open, internally pulled to GND per typical CAN transceiver convention here) = normal high-speed operation; High = low-power standby with bus wake-up capability. VIH ≥ 2.0 V, VIL ≤ 0.8 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SIT |
| Package | SOP-8 |
| Category | Interface |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
SIT1040QTSIT1040QTK
CAD (KiCad official)
- Symbol:
SIT1040QT - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SIT datasheet (17 pp, sha256
c6053c8797584571, 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).