These are original Signetics devices, quite difficult to find now. Most S87C751 devices are Philips manufacture (Philips acquired Signetics in 1975 but continued using the brand Signetics until around 2005)
Signetics
Made in Korea
S87C751-IN24
8 bit uController
80C51 Family architecture but in a compact package
24 pin DIP
I2C serial bus
2K/64 OTP/EPROM
3.5 - 12Mhz clock
Datasheets are easily obtainable online but these are available (by request)
AUTOMATIC QUANTITY DISCOUNTS APPLY FOR 2+ DEVICES WHEN USING MY OWN WEBSITE
Brand New Old Stock (clean, shiny legs)
Tested as described in the description
This item is not returnable, UNLESS not as described
