The Texas Instruments DAC0808LCN/NOPB is an 8-bit multiplying digital-to-analog converter that outputs a current proportional to the digital input and an external reference voltage. Its multiplying architecture means the reference can be an AC signal, not just a fixed DC level — useful for digitally controlled attenuators, function generators, and waveform synthesis. The parallel data interface accepts all eight bits simultaneously, so the update rate is limited only by the 150 ns typical settling time. This part lives in the 16-DIP through-hole package (0.300" body), which is breadboard-friendly and easy to hand-solder for prototyping or low-volume production runs.
The 150 ns typical settling time sets the maximum update rate for the parallel interface.
Multiplying DAC — why the external reference matters
Because the DAC0808LCN/NOPB uses an external reference, the output current is the product of the digital code and the reference voltage divided by the reference resistor. This is the part to pick when you need to digitally scale an AC signal, build a programmable gain amplifier, or generate a sine wave with a lookup table. The external reference also means the full-scale output is set by the user, not fixed internally, so you can match the DAC's output range to the downstream circuit without extra attenuation.
Texas Instruments continues to manufacture this part, so there is no last-time-buy pressure or need to qualify a replacement. The through-hole package also means it is a common stock item — lead times tend to be stable compared to fine-pitch BGA parts that run on tighter fab capacity.