Silicon Laboratories continues to push down the size of 8-bit microcontrollers. Its C8051T606 mixed-signal microcontroller comes in a 2- by 2-mm, 10-pin mini small-outline package (MSOP). It is also available in 3- by 3-mm, 14-pin small-outline IC (SOIC) and 10-pin quad flat no-lead (QFN) packages. The 25-MIPS 8051-based chip has up to 8 kbytes of one-time programmable (OTP) memory and 256 bytes of RAM. The eight digital I/O pins are 5-V compliant. And, there is a 10-bit analog-to-digital converter (ADC) and a 24.5-MHz on-chip oscillator. Pricing starts at $0.50.