NTE1508

The NTE1508 is a monolithic integrated circuit designed for linear scale analog voltage level sensing and driving 10 LEDs. It offers both dot and bar graph display modes, selectable by a single pin. The device operates with a single supply voltage as low as 3V, making it suitable for low-power applications. Its current drive to the LEDs is regulated and programmable, ranging from 2mA to 30mA, eliminating the need for external resistors.

The circuit includes an adjustable reference and a 10-step voltage divider. The input buffer accepts signals down to GND or V- and can withstand inputs of ±35V without damage. The 10 individual comparators are referenced to the precision divider, achieving typical non-linearity of 1/2%. The outputs are open-collector, DC regulated currents, allowing for flexible control and the ability to drive incandescent lamps or transistors in addition to LEDs.

This integrated circuit is housed in an 18-lead DIP package and is designed for through-hole mounting. It can be expanded to create displays with over 100 segments by chaining multiple NTE1508 units. The versatility of the NTE1508 allows for easy integration into controller, visual alarm, and expanded scale functions.