Ultra-Small, Flexible LED Expansion Reference Design


Design files


This document focuses on two reference designs using the SN74HC595B 8-bit Shift Register with 3-State Output Registers and the SN74LVC244A Octal Buffer with 3-State Outputs, each used to expand three general purpose outputs on a microcontroller to eight or more general purpose outputs. Both devices are available in the ultra-small X2SON package. The Seven Segment Driver Reference Design focuses on individually controlling the eight LEDs in seven-segments with hardware that fits underneath the display module. This 8×8 LED Matrix Reference Design focuses on driving 64 LEDs arranged as an 8×8 matrix display that could be panelized to create larger displays.

  • Wide voltage supply range of 2 V to 3.6 V
  • Expands 3 general purpose output pins to 64+outputs
  • Allows custom character displays on sevensegments
  • Indefinitely expandable to additional sevensegments
  • 8×8 LED Matrix with expandable outputs
  • Compatible with 2.5-V and 3.3-V standard logic outputs 
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUC25.PDF (11163 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDROU8.ZIP (2163 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDROU7.PDF (3248 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Shift registers

SN74HC595B8-Bit Shift Registers With 3-State Output

Data sheet: PDF | HTML
Noninverting buffers & drivers

SN74LVC244A8-ch, 1.65-V to 3.6-V buffers with 3-state outputs

Data sheet: PDF

Technical documentation

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Type Title Date
Design guide Ultra-Small, Flexible LED Expansion Reference Design Jul. 20, 2016

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