component
MAX3221EIDBR
Public Made by Adomby adom
Texas Instruments RS232 ICs, SSOP-16-208mil. 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
markdownMAX3221EIDBR
Texas Instruments · RS232 ICs · SSOP-16-208mil
MAX3221EIDBR from Texas Instruments, in a SSOP-16-208mil. 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 input; low enables ROUT output, high sets ROUT to high impedance. |
| 2 | C1+ | passive | Positive terminal of voltage doubler charge pump capacitor. |
| 3 | V+ | power_out | Charge pump generated 5.5V power supply output for external capacitor connection. |
| 4 | C1- | passive | Negative terminal of voltage doubler charge pump capacitor. |
| 5 | C2+ | passive | Positive terminal of voltage doubler charge pump capacitor. |
| 6 | C2- | passive | Negative terminal of voltage doubler charge pump capacitor. |
| 7 | V- | power_out | Charge pump generated -5.5V power supply output for external capacitor connection. |
| 8 | RIN | input | RS-232 receiver input with -25V to +25V absolute maximum rating and 3kΩ to 7kΩ input impedance. |
| 9 | ROUT | output | Receiver output to UART or logic circuit; high impedance when EN input is high. |
| 10 | INVALID | output | Status output low when RIN input remains within -0.3V to +0.3V for more than 30µs. |
| 11 | DIN | input | Driver input requiring valid high or low logic level, -0.3V to 6V absolute maximum rating. |
| 12 | FORCEON | input | Auto-powerdown control input for enabling automatic power management when low with FORCEOFF high. |
| 13 | DOUT | output | RS-232 driver output with ±5.4V nominal levels, 250kbps maximum data rate, -13.2V to +13.2V absolute maximum. |
| 14 | GND | power_in | Ground reference for all power supplies and logic signals. |
| 15 | VCC | power_in | Power supply input voltage, 3V to 5.5V recommended operating range. |
| 16 | FORCEOFF | input | Auto-powerdown control input for disabling driver output and charge pump operation when low. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-16-208mil |
| Category | Communication Interface Chip/UART/485/232 |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
MAX3221EIDBR - Footprint:
Package_SO:SSOP-16_5.3x6.2mm_P0.65mm - 3D model: SSOP-16-208mil (KiCad packages3D, STEP)
- 3D model files:
max3221eidbr-etched.step/max3221eidbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max3221eidbr.step/max3221eidbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (32 pp, sha256
4bbd61beb76489a6, retrieved 2026-10-01, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(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).