Input and output programming currents are driven by a 0.5-mA source. Since this op amp is a dual device, one half is connected as a comparator and the other half remains as a spare.

Fig 2. These flow charts show the programming for a high-side digital input (a) and a low-side digital input (b). Serial Peripheral Interface (SPI) output driver chips are popular with embedded ...

For anyone who’s seen a 1970’s era microcomputer like the Altair 8800 doing its thing, you’ll know the centerpiece of these behemoths is the array of LEDs and toggle switches used as input ...