Help ID this mystery chip

[oldfatbubba]

Can anyone ID this chip?

I was given about 20 of them last year and haven't been able to figure out what are.  CMOS?  Hex inverter?   

I believe 221-171A is a house code and 8203 is the date code (third week of 1982).  I don't know the significance of '014'.   Clearly, it's not CD4014 since they have 16 pins.

[pjwhite]

It's probably a manufacturer's internal part number, so that's no help.  I think you're right about the date code.  The white bar across the end and the style of lettering reminds me of National Semiconductor parts, though I could be wrong about that.

You could probably figure out the function if it's a digital IC.  Try putting +5 volts on pin 14 and ground on pin 7.  If it doesn't draw an excessive amount of current or blow up, you've found the power pins.  Now, use a 10K resistor that you can connect to +5 volts or ground at one end and measure the voltage on each of the other pins, first without the resistor connected, then with the resistor connected to ground and then with it connected to +5V.  If the pin voltage stays about the same in all cases, it's probably an output pin.  If the pin voltage follows the pull-up and pull-down voltage, it's probably an input (or possibly an inactive open collector output).  Once you identify the inputs and outputs, you can make a truth table of the outputs based on every possible combination of high and low inputs.  Then you can start testing for frequency response by using a signal generator and looking at the outputs with a scope to determine the propagation delay, rise and fall times, etc.

But, that's a lot of time and effort just to reclaim the use of an old IC that you could probably buy new for $0.25.  My suggestion?  Use it in an art project or donate it to someone who makes jewelry out of old electronic parts.