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RS2251XTQC16

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by adom

Jiangsu RUNIC Tech Analog Switches / Multiplexers, QFN-16L(3x3). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Contents

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RS2251XTQC16

Jiangsu RUNIC Tech · Analog Switches / Multiplexers · QFN-16L(3x3)

RS2251XTQC16 from Jiangsu RUNIC Tech, in a QFN-16L(3x3). 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 X passive Analog Switch 'X' common output/input. Bidirectional analog signal pin connected to one of X0-X7 based on A/B/C address inputs when ENABLE is low. Signal range GND to VCC.
2 X7 passive Analog switch channel input/output 7. Connected to X when C,B,A = 1,1,1 and ENABLE is low. Bidirectional analog signal, range GND to VCC.
3 X5 passive Analog switch channel input/output 5. Connected to X when C,B,A = 1,0,1 and ENABLE is low. Bidirectional analog signal, range GND to VCC.
4 ENABLE input Active-low digital enable input. When low, one of X0-X7 is connected to X per address inputs; when high, all channels are off. VIH ≥ 1.7V, VIL ≤ 0.5V. Normally connected to GND if permanently enabled.
5 NC unconnected No connect. Leave floating or tie as convenient.
6 GND power_in Ground. Connect to digital ground / system 0V reference.
7 C input Digital Address 'C' input (MSB of channel select). Binary address bit selecting X0-X7. VIH ≥ 1.7V, VIL ≤ 0.5V. Must be held at VCC or GND when unused.
8 B input Digital Address 'B' input (middle bit of channel select). Binary address bit selecting X0-X7. VIH ≥ 1.7V, VIL ≤ 0.5V.
9 A input Digital Address 'A' input (LSB of channel select). Binary address bit selecting X0-X7. VIH ≥ 1.7V, VIL ≤ 0.5V.
10 X3 passive Analog switch channel input/output 3. Connected to X when C,B,A = 0,1,1 and ENABLE is low. Bidirectional analog signal, range GND to VCC.
11 X0 passive Analog switch channel input/output 0. Connected to X when C,B,A = 0,0,0 and ENABLE is low. Bidirectional analog signal, range GND to VCC.
12 X1 passive Analog switch channel input/output 1. Connected to X when C,B,A = 0,0,1 and ENABLE is low. Bidirectional analog signal, range GND to VCC.
13 X2 passive Analog switch channel input/output 2. Connected to X when C,B,A = 0,1,0 and ENABLE is low. Bidirectional analog signal, range GND to VCC.
14 VCC power_in Positive analog and digital supply voltage input. 2.5V to 5.5V operating range. Decouple locally with a bypass capacitor to GND.
15 X4 passive Analog switch channel input/output 4. Connected to X when C,B,A = 1,0,0 and ENABLE is low. Bidirectional analog signal, range GND to VCC.
16 X6 passive Analog switch channel input/output 6. Connected to X when C,B,A = 1,1,0 and ENABLE is low. Bidirectional analog signal, range GND to VCC.
EP EP power_in Exposed thermal pad on package underside. Must be connected to GND.

Key specifications

Parameter Value
Manufacturer Jiangsu RUNIC Tech
Package QFN-16L(3x3)
Category Comm/UART
Pins 17

Ordering variants

Same part, different packaging or reel option.

  • RS2251XTQC16
  • RS2251XTQC16XS16
  • RS2251XTQC16XSS16
  • RS2251XTQC16XTSS16

CAD (KiCad official)

  • Symbol: RS2251XTQC16
  • Footprint: Package_DFN_QFN:MPS_QFN-16_3x3mm_P0.5mm
  • 3D model: QFN-16L(3x3) (KiCad packages3D, STEP)
  • 3D model files: rs2251xtqc16-etched.step / rs2251xtqc16-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rs2251xtqc16.step / rs2251xtqc16.glb are the bare package body.

Provenance

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

  • Datasheet: Jiangsu RUNIC Tech datasheet (14 pp, sha256 64ffabd09559d39d, 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