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SIT1022QTK

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by Ray

SIT LIN Transceivers, DFN-14(4.5x3). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Datasheet

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Contents

README

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SIT1022QTK

SIT · LIN Transceivers · DFN-14(4.5x3)

SIT1022QTK from SIT, in a DFN-14(4.5x3). 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 RXD1 output Receive data output for channel 1 (open-drain); active LOW after a wake-up event. Reports the LIN1 bus state to the microcontroller (recessive = HIGH, dominant = LOW).
2 SLP1_N input Enable input for channel 1. High level places channel 1 in Normal mode; low level places channel 1 in Sleep mode and resets the wake-up request on RXD1. Internal pull-down to GND (typ. 250 kΩ).
3 TXD1 input Transmit data input for channel 1 from the LIN protocol controller / microcontroller. Internal pull-down to GND (typ. 125 kΩ). VIH ≥ 2V, VIL ≤ 0.8V.
4 RXD2 output Receive data output for channel 2 (open-drain); active LOW after a wake-up event. Reports the LIN2 bus state to the microcontroller.
5 SLP2_N input Enable input for channel 2. High level places channel 2 in Normal mode; low level places channel 2 in Sleep mode and resets the wake-up request on RXD2. Internal pull-down to GND (typ. 250 kΩ).
6 NC unconnected Not connected. Leave floating or tie to ground.
7 TXD2 input Transmit data input for channel 2 from the LIN protocol controller / microcontroller. Internal pull-down to GND (typ. 125 kΩ).
8 GND power_in Ground reference. In the DFN4.5x3-14 package, the exposed back pad is also internally connected to GND and should be tied to a suitable PCB ground for heat dissipation.
9 LIN2 bidirectional LIN bus line 2 input/output. Connects to the physical LIN bus for channel 2; withstands -42V to +42V. Includes internal slave pull-up to VBAT (used when device is a slave node); a master node requires an external pull-up resistor and series diode to VBAT.
10 VBAT power_in Battery supply voltage input. Operating range 5.5V to 27V (12V nominal automotive). Absolute maximum -0.3V to +42V.
11 NC unconnected Not connected.
12 NC unconnected Not connected.
13 LIN1 bidirectional LIN bus line 1 input/output. Connects to the physical LIN bus for channel 1; withstands -42V to +42V. Includes internal slave pull-up to VBAT; master-node applications require an external pull-up resistor and series diode to VBAT.
14 NC unconnected Not connected.
EP GND_PAD power_in Exposed thermal pad on the bottom of the DFN package; internally connected to the GND pin. Solder to a PCB ground plane for improved heat dissipation.

Key specifications

Parameter Value
Manufacturer SIT
Package DFN-14(4.5x3)
Category Interface
Pins 15

Ordering variants

Same part, different packaging or reel option.

  • SIT1022QTK
  • SIT1022QHG

CAD (KiCad official)

  • Symbol: SIT1022QTK
  • Footprint: Package_DFN_QFN:DFN-14-1EP_3x4.5mm_P0.65mm_EP1.65x4.25mm
  • 3D model: DFN-14(4.5x3) (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: SIT datasheet (21 pp, sha256 b3714588e72e65b0, 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