PCF2131-breakout

rroels·PCF2131-breakout

PCF2131-breakout layout, top view — open source board by rroels

About the PCF2131-breakout

PCF2131-breakout is an open source PCB design by rroels, published on GitHub. It is a 2-layer board measuring 34.2 × 19 mm, with 9 components from 7 distinct parts.

Other key parts include the PCF2131TFY. By type, the board carries 4 resistors, 2 connectors, 2 capacitors and 1 IC.

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

From the project

Small breakout board for the NXP PCF2131 RTC

This repository contains a small breakout board for the NXP PCF2131 RTC.

The board has already been manufactured and tested, and I can confirm it works.

However, some design choices have been made that might not meet your needs. For instance, the board is wired for I2C communication only, and there is no support for battery switch-over. Please read section "Design Considerations" for more info on the design choices.

PCF2131-breakout, from the project README — From the project README

Main components on the PCF2131-breakout

PCF2131-breakout bill of materials (BOM)

9 components, 7 distinct parts.

Qty	Part	Footprint	Refs
1	PCF2131TFY	SON50P350X450X150-17N-D	IC1
1	Conn_01x04	PinHeader_2x02_P2.54mm_Vertical	J1
1	Conn_01x07	PinHeader_1x07_P2.54mm_Horizontal	J2
1	1nF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C1
1	100nF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C2
2	4.7k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R1, R2
2	10k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R3, R4

PCF2131-breakout design files

The KiCad project lives in the rroels/PCF2131-breakout repository on GitHub; these links point at the commit this page was built from.

LayoutPCF2131-breakout.kicad_pcb
SchematicPCF2131-breakout.kicad_sch

PCF2131-breakout: common questions

How big is the PCF2131-breakout?

The PCF2131-breakout measures 34.2 × 19 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PCF2131-breakout?

9 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the PCF2131-breakout design files?

From the rroels/PCF2131-breakout repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the PCF2131-breakout design in my own project?

The repository has no license, so all rights stay with rroels. Use it as a reference, and ask the author before reusing the design.

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