Long lifecycle aid for the Industrial, Energy, Transportation, Aerospace, and Military markets

Legacy 5V Devices

Early computer chips were designed around TTL standards which are based on 5V. As home computing became mass-market in the 1980s, the need to reduce costs drove the use of smaller transistor geometries, and hence more individual die/circuits for any given wafer.

As transistors shrink, the effective drive voltage scales; accordingly, and the use of lower drive voltages, results in reduced power consumption. (Lowering supply voltage from 5V – 3.3V results in a reduction of 34% in the static power and a 56% reduction in dynamic power consumption, other things being equal.)

The cost-speed-power advantages typically surpass any risks of increased susceptibility to system noise and EMC. Today’s demands for reduced power consumption everywhere and the increasing use of battery-powered systems means that 5V CMOS component manufacture has all but disappeared.

However, the support for installed legacy systems and the need for backward compatibility is an ever-present concern for suppliers of systems in the Industrial, Energy, Transportation, Aerospace, and Military markets. Product and maintenance lifecycles are longer and the re-qualification costs larger than in other markets. Their ongoing need for robustness to noise and EMC is often not easily satisfied by today’s smaller geometry-sensitive devices.

Rochester is still able to offer and manufacture many 5V devices. Our capabilities include:

  • 5V & 3.3V legacy ASIC: LSIs libraries allowing Rochester to offer the historical product portfolio as well as potentially new 5V-3.3V products
  • 5V MCU/CPUs such as Intel/AMD’s 186/188/196/286/386/486 processor ranges
  • 5V Peripherals such as Ethernet, I/O Controllers
  • 5V Memory: Atmel/Cypress/Spansion/Xicor: EPROM, EEPROM, SRAMs, NOR
  • 5V Logic: Texas Instruments/Nexperia/ON Semiconductor ABT/AC/ACT/AHC/ALS/AS/CD4000/LS/LV/TTL ranges
  • 5V Logic Arrays: AMD/Vantis/Cypress/Lattice/Texas Instruments/National/Altera: PAL/PALCE/GAL/TIBPAL ranges

Learn more about our 5V/3V ASIC solutions

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