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MAX211CDWR

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Texas Instruments RS232 ICs, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MAX211CDWR

Texas Instruments · RS232 ICs · SOIC-28-300mil

MAX211CDWR from Texas Instruments, in a SOIC-28-300mil. 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 DOUT3 tri_state RS-232 data output with high-level voltage 5-9V and low-level voltage -5 to -9V.
2 DOUT1 tri_state RS-232 data output with high-level voltage 5-9V and low-level voltage -5 to -9V.
3 DOUT2 tri_state RS-232 data output with high-level voltage 5-9V and low-level voltage -5 to -9V.
4 RIN2 input RS-232 line data input from remote RS-232 system accepting ±30V.
5 ROUT2 tri_state Logic data output to UART with high-level voltage 3.5V minimum and low-level voltage 0.4V maximum.
6 DIN2 input Logic data input from UART accepting 0V to 5.5V.
7 DIN1 input Logic data input from UART accepting 0V to 5.5V.
8 ROUT1 tri_state Logic data output to UART with high-level voltage 3.5V minimum and low-level voltage 0.4V maximum.
9 RIN1 input RS-232 line data input from remote RS-232 system accepting ±30V.
10 GND power_in Ground connection and reference for all voltage measurements.
11 VCC power_in Supply voltage input rated for 1.5V to 5.5V operation with nominal 5V.
12 C1+ passive Positive terminal of external 0.1µF charge pump capacitor.
13 V+ power_out Positive charge pump output voltage rated from VCC-0.3V to 14V for capacitor storage.
14 C1- passive Negative terminal of external 0.1µF charge pump capacitor.
15 C2+ passive Positive terminal of external 0.1µF charge pump capacitor.
16 C2- passive Negative terminal of external 0.1µF charge pump capacitor.
17 V- power_out Negative charge pump output voltage rated from 0.3V to -14V for capacitor storage.
18 RIN5 input RS-232 line data input from remote RS-232 system accepting ±30V.
19 ROUT5 tri_state Logic data output to UART with high-level voltage 3.5V minimum and low-level voltage 0.4V maximum.
20 DIN3 input Logic data input from UART accepting 0V to 5.5V.
21 DIN4 input Logic data input from UART accepting 0V to 5.5V.
22 ROUT4 tri_state Logic data output to UART with high-level voltage 3.5V minimum and low-level voltage 0.4V maximum.
23 RIN4 input RS-232 line data input from remote RS-232 system accepting ±30V.
24 EN input Active-low receiver output enable control; 0.8V low threshold and 2V high threshold disables receiver outputs to high impedance.
25 SHDN input Active-high shutdown control; 2V high threshold powers down all drivers and receivers to high impedance.
26 ROUT3 tri_state Logic data output to UART with high-level voltage 3.5V minimum and low-level voltage 0.4V maximum.
27 RIN3 input RS-232 line data input from remote RS-232 system accepting ±30V.
28 DOUT4 tri_state RS-232 data output with high-level voltage 5-9V and low-level voltage -5 to -9V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-28-300mil
Category Interface
Pins 28

CAD (KiCad official)

  • Symbol: MAX211CDWR
  • Footprint: Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm
  • 3D model: SOIC-28-300mil (KiCad packages3D, STEP)
  • 3D model files: max211cdwr-etched.step / max211cdwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max211cdwr.step / max211cdwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (24 pp, sha256 503d338b6c9b2939, retrieved 2026-10-06, 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, primary claude-haiku-4-5-20251001 (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