component
HD3SS3212RKSR
Public Made by Adomby adom
Texas Instruments Analog Switches - Special Purpose, TQFN-20-EP(2.5x4.5). KiCad symbol, footprint and 3D as used on Adom boards; pin functions from the manufacturer datasheet.
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
markdownHD3SS3212RKSR
Texas Instruments · Analog Switches - Special Purpose · TQFN-20-EP(2.5x4.5)
HD3SS3212RKSR from Texas Instruments, in a TQFN-20-EP(2.5x4.5). Symbol, footprint and 3D model are the ones used on Adom board designs (3D model: KiCad library 3D model WQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x2.9mm (CC-BY-SA 4.0 with the KiCad library exception)). Pin functions are extracted from the manufacturer datasheet with page references.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RSVD1 | output | Reserved. Can be left not connected or can be fed to VCC. [datasheet p.5] |
| 2 | OEn | input | Active-low chip enable. L: normal operation. H: shutdown. [datasheet p.4] |
| 3 | A0p | bidirectional | Port A, channel 0, high-speed positive signal. A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 4 | A0n | bidirectional | Port A, channel 0, high-speed negative signal. A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 5 | GND | power_in | Ground. [datasheet p.4] |
| 6 | VCC | power_in | 3.3-V power. [datasheet p.4] |
| 7 | A1p | bidirectional | Port A, channel 1, high-speed positive signal. A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 8 | A1n | bidirectional | Port A, channel 1, high-speed negative signal. A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 9 | SEL | input | Port select pin. L: Port A to Port B. H: Port A to Port C. [datasheet p.4] |
| 10 | RSVD2 | output | Reserved. Can be left not connected or can be fed to VCC. [datasheet p.5] |
| 11 | GND | power_in | Ground. [datasheet p.4] |
| 12 | C1n | bidirectional | Port C, channel 1, high-speed negative signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 13 | C1p | bidirectional | Port C, channel 1, high-speed positive signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 14 | C0n | bidirectional | Port C, channel 0, high-speed negative signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 15 | C0p | bidirectional | Port C, channel 0, high-speed positive signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 16 | B1n | bidirectional | Port B, channel 1, high-speed negative signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 17 | B1p | bidirectional | Port B, channel 1, high-speed positive signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 18 | B0n | bidirectional | Port B, channel 0, high-speed negative signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected. [datasheet p.4] |
| 19 | B0p | bidirectional | Port B, channel 0, high-speed positive signal (connector side). A 20-kΩ pulldown is switched in when the port is not selected (footnote, p.4). [datasheet p.5] |
| 20 | GND | power_in | Ground. [datasheet p.4] |
| 21 | GND | power_in | Exposed thermal pad (not listed in the Pin Functions table). Must be connected to ground and soldered to the PCB for thermal and mechanical performance (RKS0020A note 3, p.20). [datasheet p.14] |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TQFN-20-EP(2.5x4.5) |
| Category | Interface |
| Pins | 21 |
| LCSC | C129320 |
| Mouser | 595-HD3SS3212RKSR |
| DigiKey | 296-42174-2-ND |
| Distributor summary (LCSC listing, not datasheet) | 0.6pF 0℃ |
CAD
- Symbol:
hd3ss3212rksr(source librarySSMUX_HD3SS3212IRKSR:HD3SS3212IRKSR) - Footprint:
mux_CDT:HD3SS3212IRKSR_QFN50P450X250X100-21N - 3D model path in footprint:
${KIPRJMOD}/hd3ss3212rksr.step - 3D files:
hd3ss3212rksr-etched.step/hd3ss3212rksr-etched.glbcarry the MPN etch as a separateAdom.LaserEtchpart;hd3ss3212rksr.step/hd3ss3212rksr.glbare the bare model. - EAGLE/Fusion library:
hd3ss3212rksr.lbr(adom-lbr)
Provenance
- Datasheet: Texas Instruments HD3SS3212 datasheet (SLASE74F, revised September 2016, sha256
111def72b5f44bae, retrieved 2026-10-27, tier: mfr) - CAD: Footprint and symbol as used on Adom board designs; 3D model: KiCad library 3D model WQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x2.9mm (CC-BY-SA 4.0 with the KiCad library exception).
- Pins: KiCad symbol from the source board + adom-ds2sf datasheet extraction (claude-opus-4-7).