The NM27P512 is a 512K Processor Oriented EPROM configured as 64k x 8. It's designed to simplify microprocessor interfacing while remaining compatible with standard EPROMs. It can reduce both wait states and glue logic when the specification improvements are taken advantage of in the system design. The NM27P512 is implemented in National's advanced CMOS EPROM process to provide excellent reliability and access times as fast as 120 ns. The interface improvements address two areas to eliminate the need for additional devices to adapt the EPROM to the microprocessor and to eliminate wait states at the termination of the access cycle. Even with these improvements, the NM27P512 remains compatible with industry standard JEDEC pinout EPROMs. The maximum specification for output turn-off time has been reduced, eliminating the need for wait states at the end of a read cycle. Also, the minimum specification for output hold time has been increased, eliminating the need for external circuitry to hold the data.
The NM27P512 is a 512K (64k x 8) Processor Oriented EPROM designed to simplify microprocessor interfacing. It utilizes National Semiconductor's advanced CMOS process to provide excellent reliability with access times as fast as 120 ns.
Key features include fast output turn-off to eliminate wait states and extended data hold time for compatibility with various microprocessors. The device maintains JEDEC standard pin configuration while offering manufacturer identification codes.
| Capacity | 512K (64k x 8) |
|---|---|
| Access Time | 120 ns (Commercial) |
| Temperature Range (Commercial) | -40°C to +85°C |
| Package Types | DIP, PLCC |
Yes, it remains compatible with industry standard JEDEC pinout EPROMs.
Yes, its fast output turn-off time eliminates the need for wait states at the end of a read cycle.