Silicon Microsystems Ltd

Case Study 3 - Cooker Timer

Customer wished to reduce the cost of a microprocessor-based product. The volume was 20,000 per year and a £2.75 unit price was required.

Specific device requirements were -

• 6,000 logic gates
• oscillator
• comparators
• analogue section with capabilities for
  • high voltage
  • high current

As the result of a £3,500 definition phase, Silicon Microsystems suggested a 2 chip solution.

digital circuitry using 0.8µm CMOS cell library technology analogue circuitry using a bipolar transistor array Non-recurring engineering costs were £36,000 for the digital circuitry £4,200 for the analogue circuitry
	Cooker Timer Prototype

The production unit price met the customer's expectations.