Hi All, In my ongoing effort to reduce cost on the TIPI/32K, I was looking for an alternate for the Cypress and Alliance 62256 32KB SRAM parts used on both the Combo and regular TIPIs. Both parts have gone up in price significantly in the last year due to the semiconductor shortage. I found an ample supply of the Hitachi HM62256BLP-7 in Asia, which appears to be a drop in replacement, and are available at about 25% the cost of the current RAM parts. I got a batch, and from what I can tell they work really well and may actually be more reliable in the TIPI/32K than either of the existing parts.
Can anyone think of a reason not to use the Hitachi parts in the TIPI/32K going forward?
Also, I've notice no one length of LED leads works well for everyone from what I've seen in user posts. It needs to be super long if installed in a speech synthesizer case, but otherwise, people seem to like the leads short. Also, the long version is hard to keep safe in shipping. Rather than guess, it might be better to just put a socket on the board and ship the LED loose to let people cut to length. Obviously you'll need to get the polarity right, but there's no harm by putting it in backwards. Anyone see an issue leaving this to the user?