component
MAX3243EIRHBR
Public Made by Adomby adom
Texas Instruments RS232 ICs, VQFN-32-EP(5x5). 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
markdownMAX3243EIRHBR
Texas Instruments · RS232 ICs · VQFN-32-EP(5x5)
MAX3243EIRHBR from Texas Instruments, in a VQFN-32-EP(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 | RIN1 | input | RS-232 receiver input accepting -25V to 25V. |
| 2 | RIN2 | input | RS-232 receiver input accepting -25V to 25V. |
| 3 | RIN3 | input | RS-232 receiver input accepting -25V to 25V. |
| 4 | RIN4 | input | RS-232 receiver input accepting -25V to 25V. |
| 5 | RIN5 | input | RS-232 receiver input accepting -25V to 25V. |
| 6 | DOUT1 | output | RS-232 driver output with high voltage 5V to 5.4V and low voltage -5V to -5.4V. |
| 7 | DOUT2 | output | RS-232 driver output with high voltage 5V to 5.4V and low voltage -5V to -5.4V. |
| 8 | DOUT3 | output | RS-232 driver output with high voltage 5V to 5.4V and low voltage -5V to -5.4V. |
| 9 | NC | unconnected | Not connected internally. |
| 10 | DIN3 | input | Driver input accepting 0V to 5.5V. |
| 11 | DIN2 | input | Driver input accepting 0V to 5.5V. |
| 12 | DIN1 | input | Driver input accepting 0V to 5.5V. |
| 13 | ROUT5 | output | Receiver output providing VCC-0.6V high or 0.4V low. |
| 14 | ROUT4 | output | Receiver output providing VCC-0.6V high or 0.4V low. |
| 15 | ROUT3 | output | Receiver output providing VCC-0.6V high or 0.4V low. |
| 16 | NC | unconnected | Not connected internally. |
| 17 | ROUT2 | output | Receiver output providing VCC-0.6V high or 0.4V low. |
| 18 | ROUT1 | output | Receiver output providing VCC-0.6V high or 0.4V low. |
| 19 | ROUT2B | output | Always-active noninverting receiver output providing VCC-0.6V high or 0.4V low. |
| 20 | INVALID | output | Invalid output pin indicating RS-232 signal validity status; high when receiver input exceeds ±2.7V. |
| 21 | FORCEOFF | input | Auto powerdown control input; high with FORCEON low enables powerdown feature. |
| 22 | FORCEON | input | Auto powerdown control input; low with FORCEOFF high enables powerdown feature. |
| 23 | C1- | passive | Negative terminal of voltage-doubler charge-pump capacitor; requires 0.1μF external capacitor. |
| 24 | GND | power_in | Ground reference for all voltages. |
| 25 | NC | unconnected | Not connected internally. |
| 26 | VCC | power_in | 3V to 5.5V positive supply voltage; requires 0.1μF bypass capacitor. |
| 27 | V+ | power_out | Positive charge pump output voltage for RS-232 driver supply. |
| 28 | C1+ | passive | Positive terminal of voltage-doubler charge-pump capacitor; requires 0.1μF external capacitor. |
| 29 | C2+ | passive | Positive terminal of voltage-doubler charge-pump capacitor; requires 0.1μF external capacitor. |
| 30 | C2- | passive | Negative terminal of voltage-doubler charge-pump capacitor; requires 0.1μF external capacitor. |
| 31 | V- | power_out | Negative charge pump output voltage for RS-232 driver supply. |
| 32 | NC | unconnected | Not connected internally. |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-32-EP(5x5) |
| Category | Interface |
| Pins | 33 |
CAD (KiCad official)
- Symbol:
MAX3243EIRHBR - Footprint:
Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm - 3D model: VQFN-32-EP(5x5) (KiCad packages3D, STEP)
- 3D model files:
max3243eirhbr-etched.step/max3243eirhbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max3243eirhbr.step/max3243eirhbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (32 pp, sha256
cb5d72a205b7a01b, retrieved 2026-09-24, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).