component
SN74AC240QPWRQ1
Public Made by Adomby adom
Texas Instruments Logic ICs, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"manufacturer": "Texas Instruments",
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"description": "Output enable for buffer 1 (active low): when low the 1Y outputs pass inverted data from the 1A inputs, and when high the outputs are in the high-impedance state."
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{
"number": "2",
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"description": "Data input to buffer 1, channel 1; inputs accept voltages up to 6 V and unused inputs must be held at VCC or GND."
},
{
"number": "3",
"name": "2Y4",
"type": "tri_state",
"description": "Inverting 3-state output of buffer 2, channel 4, high-impedance when 2OE is high."
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{
"number": "4",
"name": "1A2",
"type": "input",
"description": "Data input to buffer 1, channel 2; inputs accept voltages up to 6 V and unused inputs must be held at VCC or GND."
},
{
"number": "5",
"name": "2Y3",
"type": "tri_state",
"description": "Inverting 3-state output of buffer 2, channel 3, high-impedance when 2OE is high."
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{
"number": "6",
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"type": "input",
"description": "Data input to buffer 1, channel 3; inputs accept voltages up to 6 V and unused inputs must be held at VCC or GND."
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{
"number": "7",
"name": "2Y2",
"type": "tri_state",
"description": "Inverting 3-state output of buffer 2, channel 2, high-impedance when 2OE is high."
},
{
"number": "8",
"name": "1A4",
"type": "input",
"description": "Data input to buffer 1, channel 4; inputs accept voltages up to 6 V and unused inputs must be held at VCC or GND."
},
{
"number": "9",
"name": "2Y1",
"type": "tri_state",
"description": "Inverting 3-state output of buffer 2, channel 1, high-impedance when 2OE is high."
},
{
"number": "10",
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"description": "Ground reference for the device."
},
{
"number": "11",
"name": "2A1",
"type": "input",
"description": "Data input to buffer 2, channel 1; inputs accept voltages up to 6 V and unused inputs must be held at VCC or GND."
},
{
"number": "12",
"name": "1Y4",
"type": "tri_state",
"description": "Inverting 3-state output of buffer 1, channel 4, high-impedance when 1OE is high."
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{
"number": "13",
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"type": "input",
"description": "Data input to buffer 2, channel 2; inputs accept voltages up to 6 V and unused inputs must be held at VCC or GND."
},
{
"number": "14",
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{
"number": "15",
"name": "2A3",
"type": "input",
"description": "Data input to buffer 2, channel 3; inputs accept voltages up to 6 V and unused inputs must be held at VCC or GND."
},
{
"number": "16",
"name": "1Y2",
"type": "tri_state",
"description": "Inverting 3-state output of buffer 1, channel 2, high-impedance when 1OE is high."
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{
"number": "17",
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{
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{
"number": "19",
"name": "2OE",
"type": "input",
"description": "Output enable for buffer 2 (active low): when low the 2Y outputs pass inverted data from the 2A inputs, and when high the outputs are in the high-impedance state."
},
{
"number": "20",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 2 V to 6 V; OE should be tied to VCC through a pullup resistor to keep outputs high-impedance during power up or down."
}
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"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The page 1 pin diagram text is extracted out of order (pin numbers and labels are printed in separat; The datasheet calls the outputs 3-state but does not label them with a KiCad type; they are mapped t"
],
"pages_sent": 14,
"cost_usd": 0.0638,
"at": "2026-10-18T05:59:46"
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