AMD 9511 FPU Family

AMD AM9511ADC Specifications

Type  -  Floating Point Unit / Co-processor
Family -   AMD 9511
FPU part number -   Am9511ADC is an OEM/tray floating-point unit 
Frequency  -     2 MHz 
Package -   24-pin ceramic DIP 
Socket    DIP24 

AMD AM9511A-4DC

Type  -  Floating Point Unit / Co-processor
Family -   AMD 9511
FPU part number -   Am9511A-4DC is an OEM/tray floating-point unit 
Frequency  -    4 MHz 
Package -   24-pin ceramic DIP 
Socket    DIP24