CPLD replaces discontinued IC

Abstract

What do you do when a chip you're using is discontinued and you don't want to change your PCB layout? This tricky question is one that one of our customers came to us with, for a keypad encoder system.

Luckily, the chip housing was the "outdated" dual in-line (DIL) package - this allowed us to use a CPLD in a compact ball grid array package to reproduce the same functionality, and then pack it into the same DIL form factor.

A small PCB accommodates the CPLD and DIL pin headers, and then slots seamlessly into the mainboard - without any PCB layout changes.

Employed Technologies

Altera® MAX® V | VHDL

Involved Enclustra Services

FPGA System Design | FPGA Hardware | FPGA HDL