@kenshirriff So it's like 1 bit analog shift register ? I suppose as you have an analog signal on the input pin as you "shift" you also "re-sample" the input at the "clock frequency" you are using to shift the thing ? So it's a bit like a "256 bits analog sample FIFO" ?
@gilesgoat Yes, although it doesn't make sense to discuss bits, since it is analog. It has 256 stages, so there are 256 analog samples inside the chip. Nowadays, you'd use a digital delay instead.