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SIT1145AQTK

Public Made by Adom

by adom

SIT CAN Transceivers, DFN-14(3x4.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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SIT1145AQTK

SIT · CAN Transceivers · DFN-14(3x4.5)

SIT1145AQTK from SIT, in a DFN-14(3x4.5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 TXD input Transmitter data input from the MCU, referenced to VIO (-0.2 V to VIO+0.2 V); a dominant timeout disables the transmitter if held low too long.
2 GND power_in Ground.
3 VCC power_in 5 V CAN bus supply, 4.5 V to 5.5 V recommended, absolute maximum -0.2 V to +6 V.
4 RXD output Receiver data output to the MCU, referenced to VIO (-0.2 V to VIO+0.2 V).
5 VIO power_in I/O supply for the MCU-side interface, 2.85 V to 5.5 V, supporting 3.3 V/5 V MCUs.
6 SDO output SPI data output, referenced to VIO (-0.2 V to VIO+0.2 V).
7 INH output Inhibit output switch that controls an external voltage regulator, rated -0.2 V to +40 V.
8 SCK input SPI clock input, referenced to VIO (-0.2 V to VIO+0.2 V).
9 WAKE input Local wake-up input, rated -0.2 V to +40 V; connect to GND if local wake-up is unused.
10 BAT power_in Battery supply input, 5.5 V to 28 V recommended, absolute maximum -0.2 V to +40 V.
11 SDI input SPI data input, referenced to VIO (-0.2 V to VIO+0.2 V).
12 CANL bidirectional Low-level CAN bus input/output, rated -58 V to +58 V.
13 CANH bidirectional High-level CAN bus input/output, rated -58 V to +58 V.
14 SCSN input SPI chip select input (active low), referenced to VIO (-0.2 V to VIO+0.2 V).
15 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer SIT
Package DFN-14(3x4.5)
Category Interface
Pins 15

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
电池电源电压 BAT 5.5 28 V 2
供电电压 VCC 4.5 5.5 V 2
MCU侧端口电压 VIO 2.85 5.5 V 2
最大传输速率 1/tbit 5 Mbaud 非归零码 2
CANH、CANL 输入输出电压 Vcan -58 58 V 2
总线差分电压 Vdiff 1.5 3 V 2
结温 Tj -40 150 ℃ 2
电池电源电压 BAT -0.2 40 V 2
总线电源电压 VCC，VIO -0.2 6 V 2
控制引脚电压 WAKE，INH -0.2 40 V 2
MCU侧端口 TXD，RXD，SDI，SDO，SCK，SCSN -0.2 V 2
总线侧输入电压 CANL，CANH -58 58 V 2
存储工作温度范围 -55 150 ℃ 2
结温 Tj -40 150 ℃ 2
总线端接触放电 VESD_IEC -6 6 kV 2
总线端接 HBM VESD_HBM -8 8 kV 2

CAD (KiCad official)

  • Symbol: SIT1145AQTK
  • Footprint: Package_DFN_QFN:DFN-14-1EP_3x4.5mm_P0.65mm_EP1.65x4.25mm
  • 3D model: DFN-14(3x4.5) (KiCad packages3D, STEP)
  • 3D model files: sit1145aqtk-etched.step / sit1145aqtk-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sit1145aqtk.step / sit1145aqtk.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: SIT datasheet (12 pp, sha256 c5eea4058af7465c, retrieved 2026-10-20, 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: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF