component
SN74LVC16646ADLR
Public Made by Adomby adom
Texas Instruments Latches, SSOP-56-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"description": "Texas Instruments Latches, SSOP-56-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"component": {
"mpn": "SN74LVC16646ADLR",
"manufacturer": "Texas Instruments",
"package": "SSOP-56-300mil",
"pin_count": 56,
"category": "Logic ICs",
"subcategory": "Latches",
"datasheet": "https://www.ti.com/cn/lit/gpn/sn74lvc16646a",
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"lcsc": "C2869631",
"digikey": "296-15563-2-ND",
"mouser": "595-SN74LVC16646ADLR"
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"source": "Component Ocean /api/assign-pns",
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"status": "found",
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"pins": [
{
"number": "1",
"name": "1DIR",
"type": "input",
"description": "Direction control for the first 8-bit transceiver; determines which bus receives data when 1OE is low."
},
{
"number": "2",
"name": "1CLKAB",
"type": "input",
"description": "Clock for the first-channel A-to-B register; data is stored on the low-to-high transition."
},
{
"number": "3",
"name": "1SAB",
"type": "input",
"description": "Select control for the first channel that multiplexes real-time and stored A data to the B bus."
},
{
"number": "4",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "5",
"name": "1A1",
"type": "bidirectional",
"description": "First-channel A-port data I/O 1, accepts inputs up to 5.5 V."
},
{
"number": "6",
"name": "1A2",
"type": "bidirectional",
"description": "First-channel A-port data I/O 2, accepts inputs up to 5.5 V."
},
{
"number": "7",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 1.65 V to 3.6 V operating."
},
{
"number": "8",
"name": "1A3",
"type": "bidirectional",
"description": "First-channel A-port data I/O 3, accepts inputs up to 5.5 V."
},
{
"number": "9",
"name": "1A4",
"type": "bidirectional",
"description": "First-channel A-port data I/O 4, accepts inputs up to 5.5 V."
},
{
"number": "10",
"name": "1A5",
"type": "bidirectional",
"description": "First-channel A-port data I/O 5, accepts inputs up to 5.5 V."
},
{
"number": "11",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "12",
"name": "1A6",
"type": "bidirectional",
"description": "First-channel A-port data I/O 6, accepts inputs up to 5.5 V."
},
{
"number": "13",
"name": "1A7",
"type": "bidirectional",
"description": "First-channel A-port data I/O 7, accepts inputs up to 5.5 V."
},
{
"number": "14",
"name": "1A8",
"type": "bidirectional",
"description": "First-channel A-port data I/O 8, accepts inputs up to 5.5 V."
},
{
"number": "15",
"name": "2A1",
"type": "bidirectional",
"description": "Second-channel A-port data I/O 1, accepts inputs up to 5.5 V."
},
{
"number": "16",
"name": "2A2",
"type": "bidirectional",
"description": "Second-channel A-port data I/O 2, accepts inputs up to 5.5 V."
},
{
"number": "17",
"name": "2A3",
"type": "bidirectional",
"description": "Second-channel A-port data I/O 3, accepts inputs up to 5.5 V."
},
{
"number": "18",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "19",
"name": "2A4",
"type": "bidirectional",
"description": "Second-channel A-port data I/O 4, accepts inputs up to 5.5 V."
},
{
"number": "20",
"name": "2A5",
"type": "bidirectional",
"description": "Second-channel A-port data I/O 5, accepts inputs up to 5.5 V."
},
{
"number": "21",
"name": "2A6",
"type": "bidirectional",
"description": "Second-channel A-port data I/O 6, accepts inputs up to 5.5 V."
},
{
"number": "22",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 1.65 V to 3.6 V operating."
},
{
"number": "23",
"name": "2A7",
"type": "bidirectional",
"description": "Second-channel A-port data I/O 7, accepts inputs up to 5.5 V."
},
{
"number": "24",
"name": "2A8",
"type": "bidirectional",
"description": "Second-channel A-port data I/O 8, accepts inputs up to 5.5 V."
},
{
"number": "25",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "26",
"name": "2SAB",
"type": "input",
"description": "Select control for the second channel that multiplexes real-time and stored A data to the B bus."
},
{
"number": "27",
"name": "2CLKAB",
"type": "input",
"description": "Clock for the second-channel A-to-B register; data is stored on the low-to-high transition."
},
{
"number": "28",
"name": "2DIR",
"type": "input",
"description": "Direction control for the second 8-bit transceiver; determines which bus receives data when 2OE is low."
},
{
"number": "29",
"name": "2OE",
"type": "input",
"description": "Output enable for the second channel; high selects isolation mode, and it should be tied to VCC through a pullup resistor to ensure high impedance during power up or down."
},
{
"number": "30",
"name": "2CLKBA",
"type": "input",
"description": "Clock for the second-channel B-to-A register; data is stored on the low-to-high transition."
},
{
"number": "31",
"name": "2SBA",
"type": "input",
"description": "Select control for the second channel that multiplexes real-time and stored B data to the A bus."
},
{
"number": "32",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "33",
"name": "2B8",
"type": "bidirectional",
"description": "Second-channel B-port data I/O 8, accepts inputs up to 5.5 V."
},
{
"number": "34",
"name": "2B7",
"type": "bidirectional",
"description": "Second-channel B-port data I/O 7, accepts inputs up to 5.5 V."
},
{
"number": "35",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 1.65 V to 3.6 V operating."
},
{
"number": "36",
"name": "2B6",
"type": "bidirectional",
"description": "Second-channel B-port data I/O 6, accepts inputs up to 5.5 V."
},
{
"number": "37",
"name": "2B5",
"type": "bidirectional",
"description": "Second-channel B-port data I/O 5, accepts inputs up to 5.5 V."
},
{
"number": "38",
"name": "2B4",
"type": "bidirectional",
"description": "Second-channel B-port data I/O 4, accepts inputs up to 5.5 V."
},
{
"number": "39",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "40",
"name": "2B3",
"type": "bidirectional",
"description": "Second-channel B-port data I/O 3, accepts inputs up to 5.5 V."
},
{
"number": "41",
"name": "2B2",
"type": "bidirectional",
"description": "Second-channel B-port data I/O 2, accepts inputs up to 5.5 V."
},
{
"number": "42",
"name": "2B1",
"type": "bidirectional",
"description": "Second-channel B-port data I/O 1, accepts inputs up to 5.5 V."
},
{
"number": "43",
"name": "1B8",
"type": "bidirectional",
"description": "First-channel B-port data I/O 8, accepts inputs up to 5.5 V."
},
{
"number": "44",
"name": "1B7",
"type": "bidirectional",
"description": "First-channel B-port data I/O 7, accepts inputs up to 5.5 V."
},
{
"number": "45",
"name": "1B6",
"type": "bidirectional",
"description": "First-channel B-port data I/O 6, accepts inputs up to 5.5 V."
},
{
"number": "46",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "47",
"name": "1B5",
"type": "bidirectional",
"description": "First-channel B-port data I/O 5, accepts inputs up to 5.5 V."
},
{
"number": "48",
"name": "1B4",
"type": "bidirectional",
"description": "First-channel B-port data I/O 4, accepts inputs up to 5.5 V."
},
{
"number": "49",
"name": "1B3",
"type": "bidirectional",
"description": "First-channel B-port data I/O 3, accepts inputs up to 5.5 V."
},
{
"number": "50",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 1.65 V to 3.6 V operating."
},
{
"number": "51",
"name": "1B2",
"type": "bidirectional",
"description": "First-channel B-port data I/O 2, accepts inputs up to 5.5 V."
},
{
"number": "52",
"name": "1B1",
"type": "bidirectional",
"description": "First-channel B-port data I/O 1, accepts inputs up to 5.5 V."
},
{
"number": "53",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "54",
"name": "1SBA",
"type": "input",
"description": "Select control for the first channel that multiplexes real-time and stored B data to the A bus."
},
{
"number": "55",
"name": "1CLKBA",
"type": "input",
"description": "Clock for the first-channel B-to-A register; data is stored on the low-to-high transition."
},
{
"number": "56",
"name": "1OE",
"type": "input",
"description": "Output enable for the first channel; high selects isolation mode, and it should be tied to VCC through a pullup resistor to ensure high impedance during power up or down."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
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"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The pinout is printed as a DGG/DGV/DL shared top view with pin numbers and names in separate lists. "
],
"pages_sent": 18,
"cost_usd": 0.1874,
"at": "2026-10-30T11:58:42"
},
"datasheet": {
"url": "https://www.ti.com/cn/lit/gpn/sn74lvc16646a",
"pages": 18,
"sha256": "79b96a167dc4e0ec",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 56,
"described": 56,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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"footprint_binding": "identity",
"sha256": "496b138c9bddb6111fccc97928b5e654846ac39b68862745293b24c720d158e5",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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{
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