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MAX3237-RS232-Full-Breakout-DCE

kd4cbm·MAX3237-RS232-Full-Breakout-DCE·hardware/kicad/Max3237_Breakout-DCE_Rev0.kicad_pcb

MAX3237-RS232-Full-Breakout-DCE layout, top view — open source board by kd4cbm
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About the MAX3237-RS232-Full-Breakout-DCE

MAX3237-RS232-Full-Breakout-DCE is an open source PCB design by kd4cbm, published on GitHub under the Custom license license. It is a 2-layer board measuring 31.8 × 51.4 mm, with 11 components from 8 distinct parts.

Other key parts include the C2671155. By type, the board carries 5 connectors, 5 capacitors and 1 IC.

It belongs with the dev boards & breakouts and retro computing designs in this gallery.

From the project

MAX3237-based RS-232 DCE breakout board (KiCad, JLCPCB-ready) for the RetroWiFiModem ESP32-S3 port

A 2-layer breakout board that converts a 3.3V TTL UART into true RS-232 levels using the Maxim/TI MAX3237, wired as DCE (modem-side) so it plugs directly into a DTE (terminal/PC) with a standard straight-through DE-9 cable. Built as the RS-232 front end for the RetroWiFiModem project's ESP32-S3 port, but usable standalone anywhere a 3.3V-logic device needs a real RS-232 port.

MAX3237-RS232-Full-Breakout-DCE, from the project README
From the project README

Main components on the MAX3237-RS232-Full-Breakout-DCE

C2671155

MAX3237-RS232-Full-Breakout-DCE bill of materials (BOM)

11 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C2671155
MAX3237EIPWR
U1
1
TTL_HEADER
J1
1
DE9_RS232
J2
1
MBAUD
J3
1
ENABLE
J4
1
SHUTDOWN
J5
4
0.22uF
C1, C2, C3, C4
1
0.1uF
C5

MAX3237-RS232-Full-Breakout-DCE design files

The KiCad project lives in the kd4cbm/MAX3237-RS232-Full-Breakout-DCE repository on GitHub; these links point at the commit this page was built from.

MAX3237-RS232-Full-Breakout-DCE: common questions

How big is the MAX3237-RS232-Full-Breakout-DCE?

The MAX3237-RS232-Full-Breakout-DCE measures 31.8 × 51.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MAX3237-RS232-Full-Breakout-DCE?

11 components, from 8 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the MAX3237-RS232-Full-Breakout-DCE design files?

From the kd4cbm/MAX3237-RS232-Full-Breakout-DCE repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the MAX3237-RS232-Full-Breakout-DCE design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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