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MAX3222EEUP+T
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Analog Devices Inc Maxim Integrated RS232 ICs, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMAX3222EEUP+T
Analog Devices Inc Maxim Integrated · RS232 ICs · TSSOP-20
MAX3222EEUP+T from Analog Devices Inc Maxim Integrated, in a TSSOP-20. 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 | EN | input | Receiver Enable, active low; driving EN high places the receiver outputs in a high-impedance state (input logic low max 0.8V). |
| 2 | C1+ | passive | Positive terminal of the voltage-doubler charge-pump capacitor. |
| 3 | V+ | power_out | +5.5V generated by the charge pump, with a reservoir capacitor connected. |
| 4 | C1- | passive | Negative terminal of the voltage-doubler charge-pump capacitor. |
| 5 | C2+ | passive | Positive terminal of the inverting charge-pump capacitor. |
| 6 | C2- | passive | Negative terminal of the inverting charge-pump capacitor. |
| 7 | V- | power_out | -5.5V generated by the charge pump, with a reservoir capacitor connected. |
| 8 | T2OUT | output | RS-232 transmitter 2 output, high-impedance in shutdown and tolerant of being driven up to ±12V in shutdown. |
| 9 | R2IN | input | RS-232 receiver 2 input, ESD protected to ±15kV, absolute maximum ±25V. |
| 10 | R2OUT | tri_state | TTL/CMOS receiver 2 output, three-state via EN and active in shutdown. |
| 11 | N.C. | unconnected | No connection. |
| 12 | T2IN | input | TTL/CMOS transmitter 2 input with no pullup resistor; connect unused input to GND or VCC. |
| 13 | T1IN | input | TTL/CMOS transmitter 1 input with no pullup resistor; connect unused input to GND or VCC. |
| 14 | N.C. | unconnected | No connection. |
| 15 | R1OUT | tri_state | TTL/CMOS receiver 1 output, three-state via EN and active in shutdown. |
| 16 | R1IN | input | RS-232 receiver 1 input, ESD protected to ±15kV, absolute maximum ±25V. |
| 17 | T1OUT | output | RS-232 transmitter 1 output, high-impedance in shutdown and tolerant of being driven up to ±12V in shutdown. |
| 18 | GND | power_in | Ground. |
| 19 | VCC | power_in | +3.0V to +5.5V supply voltage. |
| 20 | SHDN | input | Shutdown control, active low; SHDN = GND disables transmitters and charge pump for 1µA supply current while receivers stay active. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc Maxim Integrated |
| Package | TSSOP-20 |
| Category | Interface |
| Pins | 20 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage VCC | VCC | 3 | 5.5 | V | VCC = +3V to +5.5V (electrical characteristics header) | 2 | |
| Operating temperature range (MAX32__EE__) | TA | -40 | 85 | °C | MAX3222EE grade | 2 | |
| VCC to GND | VCC | -0.3 | 6 | V | 2 | ||
| V+ to GND | V+ | -0.3 | 7 | V | Note 1: V+ and V- magnitudes max 7V | 2 | |
| V- to GND | V- | -7 | 0.3 | V | Note 1: V+ and V- magnitudes max 7V | 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 | |||
| Output voltage R_OUT to GND | -0.3 | V | Upper limit printed as VCC + 0.3V (not numeric) | 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; VCC = +3.3V or +5V, TA = +25°C (MAX3222E) | 2 | ||
| Shutdown supply current | 1 | 10 | μA | SHDN = GND | 2 | ||
| Input logic low (T_IN, EN, SHDN, MBAUD) | 0.8 | V | 2 | ||||
| Input logic high (T_IN, EN, SHDN, MBAUD) | 2 | V | VCC = +3.3V | 2 | |||
| Input logic high (T_IN, EN, SHDN, MBAUD) | 2.4 | V | VCC = +5.0V | 2 | |||
| Input leakage current (T_IN, EN, SHDN) | -1 | 0.01 | 1 | μA | MAX3222E | 2 | |
| Receiver output leakage current (R_OUT) | -10 | 0.05 | 10 | μA | EN = VCC, receivers disabled | 3 | |
| Output-voltage low (R_OUT) | 0.4 | V | IOUT = 1.6mA | 3 | |||
| Input voltage range (R_IN) | -25 | 25 | V | 3 | |||
| Input resistance (R_IN) | 3 | 5 | 7 | kΩ | TA = +25°C | 3 | |
| Output voltage swing (T_OUT) | -5 | 5.4 | V | All transmitter outputs loaded with 3kΩ to ground (Note 6) | 3 | ||
| Output short-circuit current (T_OUT) | -60 | 60 | mA | 3 | |||
| Output leakage current (T_OUT) | -25 | 25 | μA | VCC = 0V or +3.0V to +5.5V, VOUT = ±12V, transmitters disabled | 3 | ||
| ESD Human Body Model | -15 | 15 | kV | Human Body Model | 3 | ||
| ESD IEC 1000-4-2 Air-Gap Discharge | -15 | 15 | kV | Except MAX3237E | 3 | ||
| ESD IEC 1000-4-2 Contact Discharge (R_IN, T_OUT) | -8 | 8 | kV | Except MAX3237E; R_IN, T_OUT | 3 | ||
| Maximum data rate | 250 | kbps | TA = TMIN to TMAX (MAX3222E/MAX3232E/MAX3241E) (Note 6) | 4 | |||
| Transmitter skew /tPHL - tPLH/ | 100 | ns | Note 7 | 4 | |||
| Receiver skew /tPHL - tPLH/ | 50 | ns | 4 | ||||
| Receiver output enable time | 200 | ns | Normal operation (except MAX3232E) | 4 | |||
| Receiver output disable time | 200 | ns | Normal operation (except MAX3232E) | 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 |
CAD (KiCad official)
- Symbol:
MAX3222EEUP+T - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
max3222eeup-t-etched.step/max3222eeup-t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max3222eeup-t.step/max3222eeup-t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices Inc Maxim Integrated datasheet (22 pp, sha256
20eaa43b0891f3bc, retrieved 2026-10-18, tier: lcsc) - 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).