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MAX3222EETP+T

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Maxim Integrated RS232 ICs, TQFN-20(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentcommunication interface chip-uart-485-232max3222eetp+tfactory-2.0.0extractor-text

Verified MAX3222EETP+T

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier mfr, 21 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: MAX3222EETP+T · TQFN-20(5x5) · 21 pins
  • ✓copper: 21 copper pads, none touching another net
  • ✓datasheet: all 21 pin names found in the 22-page datasheet
  • ✓distributor: lcsc C2976376, digikey MAX3222EETP+TTR-ND, mouser 700-MAX3222EETPT
  • ✓family: QFN-20-1EP_5x5mm_P0.65mm_EP3.35x3.35mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-zsmcg4a7/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 21 pins = 21 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 21 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ max3222eetp-t.kicad_sym✓ max3222eetp-t.kicad_mod✓ max3222eetp-t.step
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MAX3222EETP+T

Maxim Integrated · RS232 ICs · TQFN-20(5x5)

MAX3222EETP+T from Maxim Integrated, in a TQFN-20(5x5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 C1+ passive Positive terminal of the voltage-doubler charge-pump capacitor; the charge pump requires 0.1µF capacitors.
2 C1- passive Negative terminal of the voltage-doubler charge-pump capacitor.
3 C2+ passive Positive terminal of the inverting charge-pump capacitor.
4 C2- passive Negative terminal of the inverting charge-pump capacitor.
5 V- power_out Negative supply of about -5.5V generated by the inverting charge pump.
6 T2OUT output RS-232 transmitter output, forced to high impedance in shutdown and permitted to be driven up to ±12V in shutdown.
7 R2IN input RS-232 receiver input, absolute maximum rating ±25V to GND.
8 R2OUT output TTL/CMOS inverting receiver output, which goes high impedance when EN is driven high.
9 N.C. unconnected No connection.
10 T2IN input TTL/CMOS transmitter input; the MAX3222E transmitter inputs have no pullup, so unused inputs must be connected to GND or VCC.
11 T1IN input TTL/CMOS transmitter input; the MAX3222E transmitter inputs have no pullup, so unused inputs must be connected to GND or VCC.
12 N.C. unconnected No connection.
13 R1OUT output TTL/CMOS inverting receiver output, which goes high impedance when EN is driven high.
14 R1IN input RS-232 receiver input, absolute maximum rating ±25V to GND.
15 T1OUT output RS-232 transmitter output, forced to high impedance in shutdown and permitted to be driven up to ±12V in shutdown.
16 GND power_in Ground reference for the device.
17 VCC power_in Supply voltage, +3.0V to +5.5V.
18 SHDN input Shutdown control, active low; when SHDN is GND the transmitters are disabled and their outputs are high impedance.
19 EN input Receiver enable, active low; driving EN high places the receivers into a high-impedance state.
20 V+ power_out Positive supply of about +5.5V generated by the doubling charge pump.
21 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Maxim Integrated
Package TQFN-20(5x5)
Category Communication Interface Chip/UART/485/232
Pins 21

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
VCC to GND VCC -0.3 6 V 2
V+ to GND V+ -0.3 7 V Note 1 2
V- to GND V- -7 0.3 V Note 1 2
V+ + /V-/ 13 V Note 1 2
Input voltages T_IN, EN, SHDN, MBAUD to GND -0.3 6 V 2
Input voltage R_IN to GND -25 25 V 2
Output voltage T_OUT to GND -13.2 13.2 V 2
Operating temperature range (MAX32__EE__) TA -40 85 °C EE grade, MAX3222EETP 2
Storage temperature range TSTG -65 150 °C 2
Lead temperature (soldering) 300 °C soldering, 10s 2
Soldering temperature (reflow) 260 °C reflow 2
Supply current 0.3 1 mA SHDN = VCC, no load (MAX3222E) 2
Shutdown supply current 1 10 µA SHDN = GND 2
Input logic low VIL 0.8 V T_IN, EN, SHDN, MBAUD 2
Input logic high (VCC = +3.3V) VIH 2 V VCC = +3.3V; T_IN, EN, SHDN, MBAUD 2
Input logic high (VCC = +5.0V) VIH 2.4 V VCC = +5.0V; T_IN, EN, SHDN, MBAUD 2
Input leakage current T_IN, EN, SHDN IIN -1 1 µA MAX3222E 2
Output leakage current R_OUT (receivers disabled) -10 10 µA EN = VCC, receivers disabled 3
Output-voltage low VOL 0.4 V IOUT = 1.6mA (MAX3222E) 3
Input voltage range -25 25 V 3
Input threshold low (VCC = +3.3V) 0.6 1.1 V TA = +25°C, VCC = +3.3V 3
Input threshold low (VCC = +5.0V) 0.8 1.5 V TA = +25°C, VCC = +5.0V 3
Input threshold high (VCC = +3.3V) 1.5 2.4 V TA = +25°C, VCC = +3.3V 3
Input threshold high (VCC = +5.0V) 2 2.4 V TA = +25°C, VCC = +5.0V 3
Input resistance RIN 3 5 7 kΩ TA = +25°C 3
Output voltage swing VO -5 5.4 5 V All transmitter outputs loaded with 3kΩ to ground 3
Output resistance (min) ROUT 300 Ω VCC = 0V, transmitter output = ±2V 3
Output resistance (max) ROUT 50 kΩ VCC = 0V, transmitter output = ±2V 3
Output short-circuit current IOS -60 60 mA 3
Output leakage current T_OUT (transmitters disabled) -25 25 µA VCC = 0V or +3.0V to +5.5V, VOUT = ±12V, transmitters disabled (MAX3222E) 3
ESD Human Body Model, R_IN and T_OUT -15 15 kV Human Body Model 3
ESD IEC 1000-4-2 Air-Gap Discharge, R_IN and T_OUT -15 15 kV IEC 1000-4-2 Air-Gap Discharge 3
ESD IEC 1000-4-2 Contact Discharge, R_IN and T_OUT -8 8 kV IEC 1000-4-2 Contact Discharge 3
Maximum data rate 250 kbps RL = 3kΩ, CL = 1000pF, one transmitter switching, TA = TMIN to TMAX (MAX3222E) 4
Receiver output enable time 200 ns Normal operation (except MAX3232E) 4
Receiver output disable time 200 ns Normal operation (except MAX3232E) 4
Transmitter skew /tPHL - tPLH/ 100 ns Transmitter zero crosspoints 4
Receiver skew /tPHL - tPLH/ 50 ns 4
Transition-region slew rate 6 30 V/µs VCC = +3.3V, TA = +25°C, RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF, one transmitter switching 4
Receiver propagation delay tPHL tPHL 0.15 µs Receiver input to receiver output, CL = 150pF 4
Receiver propagation delay tPLH tPLH 0.15 µs Receiver input to receiver output, CL = 150pF 4
Transmitter input hysteresis 0.5 V 2
Receiver input hysteresis 0.5 V 3

CAD (KiCad official)

  • Symbol: MAX3222EETP+T
  • Footprint: Package_DFN_QFN:QFN-20-1EP_5x5mm_P0.65mm_EP3.35x3.35mm
  • 3D model: TQFN-20(5x5) (KiCad packages3D, STEP)
  • 3D model files: max3222eetp-t-etched.step / max3222eetp-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3222eetp-t.step / max3222eetp-t.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Maxim Integrated datasheet (22 pp, sha256 773dd6aa67273c10, retrieved 2026-10-31, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF