component
SN74CB3Q3251PW
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"description": "Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"component": {
"mpn": "SN74CB3Q3251PW",
"manufacturer": "Texas Instruments",
"package": "TSSOP-16",
"pin_count": 16,
"category": "Logic",
"subcategory": "Signal Switches, Multiplexers, Decoders",
"datasheet": "https://www.ti.com/lit/ds/symlink/sn74cb3q3251.pdf",
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"distributor_links": {
"lcsc": "C2866862",
"digikey": "296-47719-ND",
"mouser": "595-SN74CB3Q3251PW"
},
"distributor_check": {
"checked_at": "2026-11-05T22:56:10Z",
"source": "Component Ocean /api/assign-pns",
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"pn": "296-47719-ND",
"status": "found"
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"pn": "595-SN74CB3Q3251PW",
"status": "found"
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},
"pins": [
{
"number": "1",
"name": "B4",
"type": "bidirectional",
"description": "Switch I/O port B4, connected to the A port when OE is low and S2, S1, S0 select channel 4 (L, H, H)."
},
{
"number": "2",
"name": "B3",
"type": "bidirectional",
"description": "Switch I/O port B3, connected to the A port when OE is low and S2, S1, S0 select channel 3 (L, H, L)."
},
{
"number": "3",
"name": "B2",
"type": "bidirectional",
"description": "Switch I/O port B2, connected to the A port when OE is low and S2, S1, S0 select channel 2 (L, L, H)."
},
{
"number": "4",
"name": "B1",
"type": "bidirectional",
"description": "Switch I/O port B1, connected to the A port when OE is low and S2, S1, S0 select channel 1 (L, L, L)."
},
{
"number": "5",
"name": "A",
"type": "bidirectional",
"description": "Common switch I/O port A, a 5V-tolerant data port that switches rail-to-rail (0 to 5V with VCC 3.3V, 0 to 3.3V with VCC 2.5V) to the selected B port."
},
{
"number": "6",
"name": "NC",
"type": "unconnected",
"description": "No internal connection."
},
{
"number": "7",
"name": "OE",
"type": "input",
"description": "Active-low output enable; when high, the A and B ports are disconnected (high-impedance), and it must be pulled up to VCC through a resistor to hold high-impedance during power up or down."
},
{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "9",
"name": "S2",
"type": "input",
"description": "Select input bit 2 of the 1-of-8 multiplexer; its TTL or 5V/3.3V CMOS level chooses the channel together with S1 and S0."
},
{
"number": "10",
"name": "S1",
"type": "input",
"description": "Select input bit 1 of the 1-of-8 multiplexer; its TTL or 5V/3.3V CMOS level chooses the channel together with S2 and S0."
},
{
"number": "11",
"name": "S0",
"type": "input",
"description": "Select input bit 0 of the 1-of-8 multiplexer; its TTL or 5V/3.3V CMOS level chooses the channel together with S2 and S1."
},
{
"number": "12",
"name": "B8",
"type": "bidirectional",
"description": "Switch I/O port B8, connected to the A port when OE is low and S2, S1, S0 select channel 8 (H, H, H)."
},
{
"number": "13",
"name": "B7",
"type": "bidirectional",
"description": "Switch I/O port B7, connected to the A port when OE is low and S2, S1, S0 select channel 7 (H, H, L)."
},
{
"number": "14",
"name": "B6",
"type": "bidirectional",
"description": "Switch I/O port B6, connected to the A port when OE is low and S2, S1, S0 select channel 6 (H, L, H)."
},
{
"number": "15",
"name": "B5",
"type": "bidirectional",
"description": "Switch I/O port B5, connected to the A port when OE is low and S2, S1, S0 select channel 5 (H, L, L)."
},
{
"number": "16",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, specified from 2.3V to 3.6V."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
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"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The PW (TSSOP-16) pinout was taken from the 'DBQ, DGV, OR PW PACKAGE (TOP VIEW)' drawing on page 4. "
],
"pages_sent": 26,
"cost_usd": 0.0294,
"at": "2026-11-05T22:55:56"
},
"datasheet": {
"url": "https://www.ti.com/lit/ds/symlink/sn74cb3q3251.pdf",
"pages": 26,
"sha256": "c17910e9e247dc05",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 16,
"described": 16,
"cites_pages": true,
"refuses_to_fabricate": true
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