component
SN74CBT3257CPWR
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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"mpn": "SN74CBT3257CPWR",
"manufacturer": "Texas Instruments",
"package": "TSSOP-16",
"pin_count": 16,
"category": "Logic",
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"number": "1",
"name": "S",
"type": "input",
"description": "Select input that chooses the data path for the 1-of-2 multiplexer: low connects A to B1 and high connects A to B2, with control inputs TTL/5-V CMOS compatible (VIH min 2 V, VIL max 0.8 V)."
},
{
"number": "2",
"name": "1B1",
"type": "bidirectional",
"description": "Switch port 1B1 of the 1A channel, connected to 1A when OE is low and S is low; data I/O supports 0 to 5.5 V and the port is protected for undershoot to −2 V."
},
{
"number": "3",
"name": "1B2",
"type": "bidirectional",
"description": "Switch port 1B2 of the 1A channel, connected to 1A when OE is low and S is high; data I/O supports 0 to 5.5 V and the port is protected for undershoot to −2 V."
},
{
"number": "4",
"name": "1A",
"type": "bidirectional",
"description": "Common A port of the first 1-of-2 switch, which is connected to 1B1 or 1B2 under control of S and OE and has typical ron of 3 Ω; undershoot protected to −2 V."
},
{
"number": "5",
"name": "2B1",
"type": "bidirectional",
"description": "Switch port 2B1 of the 2A channel, connected to 2A when OE is low and S is low; data I/O supports 0 to 5.5 V and the port is protected for undershoot to −2 V."
},
{
"number": "6",
"name": "2B2",
"type": "bidirectional",
"description": "Switch port 2B2 of the 2A channel, connected to 2A when OE is low and S is high; data I/O supports 0 to 5.5 V and the port is protected for undershoot to −2 V."
},
{
"number": "7",
"name": "2A",
"type": "bidirectional",
"description": "Common A port of the second 1-of-2 switch, which is connected to 2B1 or 2B2 under control of S and OE and has typical ron of 3 Ω; undershoot protected to −2 V."
},
{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Device ground reference; continuous current through the GND terminal is limited to ±100 mA absolute maximum."
},
{
"number": "9",
"name": "3A",
"type": "bidirectional",
"description": "Common A port of the third 1-of-2 switch, which is connected to 3B1 or 3B2 under control of S and OE and has typical ron of 3 Ω; undershoot protected to −2 V."
},
{
"number": "10",
"name": "3B2",
"type": "bidirectional",
"description": "Switch port 3B2 of the 3A channel, connected to 3A when OE is low and S is high; data I/O supports 0 to 5.5 V and the port is protected for undershoot to −2 V."
},
{
"number": "11",
"name": "3B1",
"type": "bidirectional",
"description": "Switch port 3B1 of the 3A channel, connected to 3A when OE is low and S is low; data I/O supports 0 to 5.5 V and the port is protected for undershoot to −2 V."
},
{
"number": "12",
"name": "4A",
"type": "bidirectional",
"description": "Common A port of the fourth 1-of-2 switch, which is connected to 4B1 or 4B2 under control of S and OE and has typical ron of 3 Ω; undershoot protected to −2 V."
},
{
"number": "13",
"name": "4B2",
"type": "bidirectional",
"description": "Switch port 4B2 of the 4A channel, connected to 4A when OE is low and S is high; data I/O supports 0 to 5.5 V and the port is protected for undershoot to −2 V."
},
{
"number": "14",
"name": "4B1",
"type": "bidirectional",
"description": "Switch port 4B1 of the 4A channel, connected to 4A when OE is low and S is low; data I/O supports 0 to 5.5 V and the port is protected for undershoot to −2 V."
},
{
"number": "15",
"name": "OE",
"type": "input",
"description": "Active-low output enable: low enables the switch path, high disables it into high-impedance between A and B; tie to VCC through a pullup during power up or down (control VIH min 2 V, VIL max 0.8 V)."
},
{
"number": "16",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, recommended operating range 4 V to 5.5 V, with ICC of 3 µA max at VCC = 5.5 V."
}
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"guards": "pin_guards 0.1: passed",
"guard_notes": [
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],
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"at": "2026-10-18T04:37:28"
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