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SIT2551T

Public Unreviewed

by Ray

SIT CAN Controllers, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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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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Contents

README

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SIT2551T

SIT · CAN Controllers · SOP-8

SIT2551T 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 Transmitter data input from the CAN controller. Logic low drives the bus dominant; logic high (or floating) leaves the bus recessive. Input range -0.3 V to VCC+0.3 V; internally biased high when floating.
2 GND power_in Device ground reference (0 V) for all signals and supply.
3 VCC power_in Supply voltage input, 4.5 V to 5.5 V (5 V nominal, ±10%). Absolute maximum -0.3 V to +6 V. Bypass with a local decoupling capacitor to GND.
4 RXD output Receiver data output to the CAN controller. Reports bus state: low when the bus is dominant, high when recessive. Push-pull CMOS output (VOH ≥ 4 V, VOL ≤ 0.4 V at IO = 2 mA).
5 VREF output Reference voltage output at approximately 0.5·VCC (typ 2.5 V, range 0.3·VCC to 0.7·VCC for
6 CANL bidirectional Low-side CAN bus I/O. Driven low (~1.5 V typ) during dominant; sits near 2.5 V during recessive. Bus fault tolerance -40 V to +40 V (transient -200 V to +200 V per Vtr spec).
7 CANH bidirectional High-side CAN bus I/O. Driven high (~3.5 V typ) during dominant; sits near 2.5 V during recessive. Bus fault tolerance -40 V to +40 V (transient -200 V to +200 V per Vtr spec).
8 RS input Mode select input: tie low (or through a resistor to GND) for high-speed mode; drive high (or float) for low-current standby mode with bus wake-up. Slope control possible via resistor to GND.

Key specifications

Parameter Value
Manufacturer SIT
Package SOP-8
Category Interface
Pins 8

CAD (KiCad official)

  • Symbol: SIT2551T
  • 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 (13 pp, sha256 35c221717e46be6a, 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).

Datasheet PDF