AY  were old General Instruments numbers IIRC
eg: UART General Instruments' AY5-1013A
D

Charles Craft wrote:
> The Microchip parts starting with "TC" are from an analog acquisition (Telcom).
> "PS" from Power Smart?
> New analog parts are "MCP" parts.
> We're all familiar with the PIC parts.
> Keeloq HCS parts - "Hopping Code ???"
> 
> Where did the "AY" and "ENC" parts come from?
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