component
MAX3237CAI+
Public Made by Adomby adom
Maxim Integrated Pre-ordered Chips, SSOP-28-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"component": {
"mpn": "MAX3237CAI+",
"manufacturer": "Maxim Integrated",
"package": "SSOP-28-208mil",
"pin_count": 28,
"category": "Interface ICs",
"subcategory": "Pre-ordered Chips",
"datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/max3222-max3241.pdf",
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"distributor_links": {
"lcsc": "C1544158",
"digikey": "MAX3237CAI+-ND",
"mouser": "700-MAX3237CAI"
},
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"source": "Component Ocean /api/assign-pns",
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"status": "found"
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"pins": [
{
"number": "1",
"name": "C2+",
"type": "passive",
"description": "Positive terminal of the inverting charge-pump capacitor C2, which the datasheet specifies as 0.22µF to 1.0µF for the 3.0V to 5.5V range."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "3",
"name": "C2-",
"type": "passive",
"description": "Negative terminal of the inverting charge-pump capacitor C2."
},
{
"number": "4",
"name": "V-",
"type": "power_out",
"description": "Generated -5.5V charge-pump output that is pulled to ground when the device is shut down."
},
{
"number": "5",
"name": "T1OUT",
"type": "output",
"description": "RS-232 transmitter 1 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
},
{
"number": "6",
"name": "T2OUT",
"type": "output",
"description": "RS-232 transmitter 2 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
},
{
"number": "7",
"name": "T3OUT",
"type": "output",
"description": "RS-232 transmitter 3 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
},
{
"number": "8",
"name": "R1IN",
"type": "input",
"description": "RS-232 receiver 1 input, rated for a voltage range of ±25V."
},
{
"number": "9",
"name": "R2IN",
"type": "input",
"description": "RS-232 receiver 2 input, rated for a voltage range of ±25V."
},
{
"number": "10",
"name": "T4OUT",
"type": "output",
"description": "RS-232 transmitter 4 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
},
{
"number": "11",
"name": "R3IN",
"type": "input",
"description": "RS-232 receiver 3 input, rated for a voltage range of ±25V."
},
{
"number": "12",
"name": "T5OUT",
"type": "output",
"description": "RS-232 transmitter 5 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
},
{
"number": "13",
"name": "EN",
"type": "input",
"description": "Receiver enable, active low; when high the inverting R_OUT outputs are put into high-impedance, and it has no effect on T_OUT."
},
{
"number": "14",
"name": "SHDN",
"type": "input",
"description": "Shutdown control, active low; in shutdown the charge pumps are off, transmitter outputs are high-impedance and supply current is 1.0µA typical (10µA max) with SHDN = GND."
},
{
"number": "15",
"name": "MBAUD",
"type": "input",
"description": "MegaBaud control input; connect to GND for normal 250kbps operation or to VCC for 1Mbps transmission rates."
},
{
"number": "16",
"name": "R1OUTB",
"type": "output",
"description": "Noninverting complementary receiver 1 output that is always active, regardless of the state of EN or SHDN."
},
{
"number": "17",
"name": "T5IN",
"type": "input",
"description": "TTL/CMOS transmitter 5 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
},
{
"number": "18",
"name": "R3OUT",
"type": "output",
"description": "Inverting TTL/CMOS receiver 3 output that goes high-impedance when EN is high."
},
{
"number": "19",
"name": "T4IN",
"type": "input",
"description": "TTL/CMOS transmitter 4 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
},
{
"number": "20",
"name": "R2OUT",
"type": "output",
"description": "Inverting TTL/CMOS receiver 2 output that goes high-impedance when EN is high."
},
{
"number": "21",
"name": "R1OUT",
"type": "output",
"description": "Inverting TTL/CMOS receiver 1 output that goes high-impedance when EN is high."
},
{
"number": "22",
"name": "T3IN",
"type": "input",
"description": "TTL/CMOS transmitter 3 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
},
{
"number": "23",
"name": "T2IN",
"type": "input",
"description": "TTL/CMOS transmitter 2 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
},
{
"number": "24",
"name": "T1IN",
"type": "input",
"description": "TTL/CMOS transmitter 1 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
},
{
"number": "25",
"name": "C1-",
"type": "passive",
"description": "Negative terminal of the voltage-doubler charge-pump capacitor C1."
},
{
"number": "26",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage of +3.0V to +5.5V (absolute maximum +6V)."
},
{
"number": "27",
"name": "V+",
"type": "power_out",
"description": "Generated +5.5V charge-pump output that is pulled down to VCC when the device is shut down."
},
{
"number": "28",
"name": "C1+",
"type": "passive",
"description": "Positive terminal of the voltage-doubler charge-pump capacitor C1."
}
],
"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: Ordering table (page 15) lists MAX3237CAI+ with a '16' pin count but package code A28+2 (SSOP, 21-00; The datasheet text does not state the SSOP body width (208mil). Package identity is taken from the p; Pin types for the charge-pump capacitor terminals (C1+, C1-, C2+, C2-) were classed as passive becau",
"11/28 pins cited to the wrong page (name found elsewhere): ['6:T2OUT@p6', '7:T3OUT@p6', '9:R2IN@p6', '10:T4OUT@p6']"
],
"pages_sent": 17,
"cost_usd": 0.1125,
"at": "2026-10-30T18:41:13"
},
"datasheet": {
"url": "https://www.analog.com/media/en/technical-documentation/data-sheets/max3222-max3241.pdf",
"pages": 17,
"sha256": "6179886183cdd63b",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 28,
"described": 28,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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