>> faster, lower power, maybe even cheaper, etc. > TTL could never claim "lower power" :-)
If there's little enough of it it can! (Not strictly TTL, but much the same technology - I once built a timer with a 555 and some discretes and cut the power draw by about an order of magnitude as compared to a small CPU - Arduino or the like - doing the same job.) Would it be lower power in this case? I don't know; I haven't built, nor even designed in detail, either version of the circuit. And, come to think of it, while not strictly TTL, there are TTL-compatible CMOS families, like 74HCT and 74ALS, that almost certainly would be lower-power. While they aren't classic tech, the question asked about using modern tech to interface to classic HP-HIL, so they may be admissible here. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML [email protected] / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B
