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.
Generated by kicad-footprint-generator · KiCad file format 20260206
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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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max3222eetp-t.step/max3222eetp-t.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).