31 Jan
2025
31 Jan
'25
3:12 p.m.
On 1/31/25 12:57, Dennis Boone via cctalk wrote:
Some dates relevant to this discussion:
"First" monolithic IC in the lab: 1960.
First PCM multiplexed telephone circuit (T1, 1.544 Mbit/s): 1962.
First UART IC: 1972.
In the mid 70s, I was project manager for an internal product of a
remote (thousands of miles) operator's console. The engineer designing
the telecom (asynchronous) interface did not trust the MSI UARTs and
insisted on implementing the UART with available random bipolar logic.
Since this was pretty much a one-off, I didn't argue.
It did work.
--Chuck