component
MAX3222EETP+T
Public Made by Adomby adom
Maxim Integrated RS232 ICs, TQFN-20(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "max3222eetp-t",
"version": "0.1.0",
"type": "component",
"description": "Maxim Integrated RS232 ICs, TQFN-20(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"communication interface chip-uart-485-232",
"max3222eetp+t",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
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"component": {
"mpn": "MAX3222EETP+T",
"manufacturer": "Maxim Integrated",
"package": "TQFN-20(5x5)",
"pin_count": 21,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "RS232 ICs",
"datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/max3222e-max3246e.pdf",
"parts": {
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"lbr": "max3222eetp-t.lbr"
},
"distributor_links": {
"lcsc": "C2976376",
"digikey": "MAX3222EETP+TTR-ND",
"mouser": "700-MAX3222EETPT"
},
"distributor_check": {
"checked_at": "2026-10-31T01:25:19Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "MAX3222EETP+TTR-ND",
"status": "found"
},
"mouser": {
"pn": "700-MAX3222EETPT",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "C1+",
"type": "passive",
"description": "Positive terminal of the voltage-doubler charge-pump capacitor; the charge pump requires 0.1µF capacitors."
},
{
"number": "2",
"name": "C1-",
"type": "passive",
"description": "Negative terminal of the voltage-doubler charge-pump capacitor."
},
{
"number": "3",
"name": "C2+",
"type": "passive",
"description": "Positive terminal of the inverting charge-pump capacitor."
},
{
"number": "4",
"name": "C2-",
"type": "passive",
"description": "Negative terminal of the inverting charge-pump capacitor."
},
{
"number": "5",
"name": "V-",
"type": "power_out",
"description": "Negative supply of about -5.5V generated by the inverting charge pump."
},
{
"number": "6",
"name": "T2OUT",
"type": "output",
"description": "RS-232 transmitter output, forced to high impedance in shutdown and permitted to be driven up to ±12V in shutdown."
},
{
"number": "7",
"name": "R2IN",
"type": "input",
"description": "RS-232 receiver input, absolute maximum rating ±25V to GND."
},
{
"number": "8",
"name": "R2OUT",
"type": "output",
"description": "TTL/CMOS inverting receiver output, which goes high impedance when EN is driven high."
},
{
"number": "9",
"name": "N.C.",
"type": "unconnected",
"description": "No connection."
},
{
"number": "10",
"name": "T2IN",
"type": "input",
"description": "TTL/CMOS transmitter input; the MAX3222E transmitter inputs have no pullup, so unused inputs must be connected to GND or VCC."
},
{
"number": "11",
"name": "T1IN",
"type": "input",
"description": "TTL/CMOS transmitter input; the MAX3222E transmitter inputs have no pullup, so unused inputs must be connected to GND or VCC."
},
{
"number": "12",
"name": "N.C.",
"type": "unconnected",
"description": "No connection."
},
{
"number": "13",
"name": "R1OUT",
"type": "output",
"description": "TTL/CMOS inverting receiver output, which goes high impedance when EN is driven high."
},
{
"number": "14",
"name": "R1IN",
"type": "input",
"description": "RS-232 receiver input, absolute maximum rating ±25V to GND."
},
{
"number": "15",
"name": "T1OUT",
"type": "output",
"description": "RS-232 transmitter output, forced to high impedance in shutdown and permitted to be driven up to ±12V in shutdown."
},
{
"number": "16",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "17",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, +3.0V to +5.5V."
},
{
"number": "18",
"name": "SHDN",
"type": "input",
"description": "Shutdown control, active low; when SHDN is GND the transmitters are disabled and their outputs are high impedance."
},
{
"number": "19",
"name": "EN",
"type": "input",
"description": "Receiver enable, active low; driving EN high places the receivers into a high-impedance state."
},
{
"number": "20",
"name": "V+",
"type": "power_out",
"description": "Positive supply of about +5.5V generated by the doubling charge pump."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"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 exposed pad (EP) is listed in the pin description table as a non-numbered pad with no pin number; The multi-package pin table gives TQFN pin numbers for T_OUT, R_IN, R_OUT and T_IN as two-number pai; Pins 9 and 12 are listed as N.C. (no connection) for the MAX3222E TQFN.",
"exposed pad 21 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint",
"8/21 pins cited to the wrong page (name found elsewhere): ['6:T2OUT@p7', '7:R2IN@p7', '8:R2OUT@p7', '10:T2IN@p7']"
],
"pages_sent": 13,
"cost_usd": 0.1028,
"at": "2026-10-31T01:24:42"
},
"datasheet": {
"url": "https://www.analog.com/media/en/technical-documentation/data-sheets/max3222e-max3246e.pdf",
"pages": 22,
"sha256": "773dd6aa67273c10",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"zmin_mm": 0.0,
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"footprint_binding": "identity",
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"checked": "2026-10-31",
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},
{
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"role": "eda",
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}