On Mar 5, 7:29, Ethan Dicks wrote: Yes :-) The MAN series used to be popular but I'm afraid I don't have any data. However, I do have a data sheet for the DS8867 -- it gets a page-and-a-bit in the 1980 Nat Semi Interface Data Book: DS8867 is an 18-pin DIP 8-segment constant-current driver, designed to be driven from MOS circuits operateing at 8V +/-10% minimum, and will supply 14mA typical current to an LED display. Output current is not sensitive to Vcc variations. Features: internal current control - no external resistors 100% efficient - no standby power operates in 3- and 4-cell battery systems inputs and outputs grouped for easy PC placement Absolute maximum ratings: Vcc 7V input voltage 10V output voltage 10V Operating conditions: Vcc min 3.3V max 6.0V ambient temperature min 0deg C max 70deg C logical '1' input typ 4.9V max 5.4V logical '0' input typ 0.1uA max 10uA logical '1' output min -8mA typ -14mA max -18mA logical '0' output typ -0.5uA max -10uA Pinout is straightforward, pins 1..8 are inputs 1..8, pin 9 is ground, pins 10..17 are outputs 8..1 (ie the outputs are almost opposite the inputs), pin 18 is Vcc. -- Pete Peter Turnbull Network Manager University of York