component
SIT1057QT
Public Made by Adomby adom
SIT CAN Transceivers, SOP-8. Pinout extracted from the datasheet, 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
markdownSIT1057QT
SIT · CAN Transceivers · SOP-8
SIT1057QT 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. A logic low on TXD drives the bus to the dominant state; a logic high (or floating) leaves the bus recessive. Internal pull-up to VIO. TXD dominant time-out (t_dom_TXD) is typically 3 ms (0.8 ms min, 6.5 ms max) to prevent a stuck-dominant TXD from permanently blocking the bus. |
| 2 | GND | power_in | Ground reference (0 V). All voltages on the device are referenced to this pin. |
| 3 | VCC | power_in | Main 5 V supply for the transceiver. Recommended operating range 4.75 V to 5.25 V; absolute-max -0.3 V to +7 V. Features an internal under-voltage lock-out (UVLO) that forces the bus to recessive when VCC is invalid. |
| 4 | RXD | output | Receive data output to the CAN controller. Reports the differential bus state: low when the bus is dominant, high when recessive. Output is referenced to VIO on /3 variants, or to VCC on the base SIT1057QT variant. |
| 5 | N.C. | unconnected | Not internally connected on the SIT1057QT (base) variant. Leave floating or tie to GND. On the SIT1057QT/3 and SIT1057QTK/3 variants this same pin becomes VIO (I/O reference supply, 2.95 V-5.25 V) to allow 3.3 V MCU interfacing. |
| 6 | CANL | bidirectional | Low-level CAN bus I/O. Nominal 1.5 V dominant / 2.5 V recessive. Withstands -40 V to +40 V bus-fault voltage and -27 V to +27 V differential relative to CANH. Includes short-circuit current limiting (±100 mA dominant). |
| 7 | CANH | bidirectional | High-level CAN bus I/O. Nominal 3.5 V dominant / 2.5 V recessive. Withstands -40 V to +40 V bus-fault voltage. Together with CANL forms the differential CAN pair (Vdiff 1.5 V-3.0 V dominant). |
| 8 | S | input | Mode select input. Logic low selects high-speed (normal) mode; logic high selects silent (listen-only / standby) mode in which the transmitter is disabled but the receiver still forwards traffic to RXD. Referenced to VIO on /3 variants. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SIT |
| Package | SOP-8 |
| Category | Interface |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
SIT1057QTSIT1057QT/3SIT1057QTK/3
CAD (KiCad official)
- Symbol:
SIT1057QT - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
sit1057qt-etched.step/sit1057qt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sit1057qt.step/sit1057qt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SIT datasheet (19 pp, sha256
60c076ba9502071a, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).