The ’F525 is a multi-function 28-pin device It consists of a 16-bit count-down counter logic to control the counter logic to control the state of the outputs and a PLA to decode the particular function selected by the user The list of highspeed timing applications include.
| Part Number | Manufacturer | Description |
|---|---|---|
| 74F521 | Texas Instruments | 8-Bit Identity Comparators |
| 74F521 | Philips Semiconductors | 8-bit identity comparator |
| 74F524 | Fairchild Semiconductor | 8-Bit Registered Comparator |
| 74F524 | Philips Semiconductors | 8-bit register comparator |
| 74F521 | National Semiconductor | 8-Bit Identity Comparator |
