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MAX3223ECDBR

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Texas Instruments RS232 ICs, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MAX3223ECDBR

Texas Instruments · RS232 ICs · SSOP-20-208mil

MAX3223ECDBR from Texas Instruments, in a SSOP-20-208mil. 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 the receiver outputs and high puts ROUT1/ROUT2 in high impedance (input range 0 to 5.5 V).
2 C1+ passive Charge-pump capacitor C1 positive terminal (0.1 µF at VCC = 3.3 V ± 0.3 V, 0.047 µF at 5 V ± 0.5 V).
3 V+ power_out Positive charge-pump output supply for RS-232 levels, bypassed with a capacitor to GND (absolute max 7 V).
4 C1− passive Charge-pump capacitor C1 negative terminal.
5 C2+ passive Charge-pump capacitor C2 positive terminal (0.1 µF at 3.3 V, 0.33 µF at 5 V).
6 C2− passive Charge-pump capacitor C2 negative terminal.
7 V− power_out Negative charge-pump output supply for RS-232 levels, bypassed with a capacitor to GND (absolute max −7 V).
8 DOUT2 output RS-232 driver 2 output with ±15 kV HBM ESD protection and ±13.2 V absolute maximum output range.
9 RIN2 input RS-232 receiver 2 input with 5 kΩ nominal resistance, ±25 V input range and ±15 kV HBM ESD protection.
10 ROUT2 output Receiver 2 logic output, high impedance when EN is high.
11 INVALID output Valid-signal output that is high when any receiver input is beyond ±2.7 V (or within ±0.3 V for under 30 µs) and low when inputs stay between −0.3 V and 0.3 V for more than 30 µs.
12 DIN2 input Driver 2 logic input (high-level 2 V min at 3.3 V, 2.4 V min at 5 V; 0.8 V max low; 5.5 V max).
13 DIN1 input Driver 1 logic input (high-level 2 V min at 3.3 V, 2.4 V min at 5 V; 0.8 V max low; 5.5 V max).
14 FORCEON input Drives auto-powerdown control; high with FORCEOFF high disables auto-powerdown, low with FORCEOFF high enables it.
15 ROUT1 output Receiver 1 logic output, high impedance when EN is high.
16 RIN1 input RS-232 receiver 1 input with 5 kΩ nominal resistance, ±25 V input range and ±15 kV HBM ESD protection.
17 DOUT1 output RS-232 driver 1 output with ±15 kV HBM ESD protection and ±13.2 V absolute maximum output range.
18 GND power_in Ground; ESD-protected against RS-232 bus pins to ±15 kV HBM.
19 VCC power_in Supply voltage 3 V to 3.6 V or 4.5 V to 5.5 V (absolute max 6 V), bypassed with a ceramic capacitor.
20 FORCEOFF input Active-low power-down control; low turns off drivers and charge pump (ICC about 1 µA), high allows normal or auto-powerdown operation.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SSOP-20-208mil
Category Interface
Pins 20

CAD (KiCad official)

  • Symbol: MAX3223ECDBR
  • Footprint: Package_SO:SSOP-20_5.3x7.2mm_P0.65mm
  • 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
  • 3D model files: max3223ecdbr-etched.step / max3223ecdbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3223ecdbr.step / max3223ecdbr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 45ca048c81e9b2a5, retrieved 2026-10-08, 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-5-5 (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