Product Overview
Used 512-Kilobit 28-Pin Ceramic UV Erasable EPROM
Product Condition
Used, clean. Nice vintage 28-pin ceramic DIP memory chip pulled from retired analytical lab equipment. Die visible through quartz window. Pins appear straight and clean.
Ships same business day. Reliable parts since 1999. Honest pricing, no nonsense.
Product Overview
Fairchild FM27C512Q is a 512-kilobit ultraviolet-erasable programmable read-only memory organized as 65,536 words by 8 bits (64K x 8). This CMOS EPROM is housed in a 28-pin ceramic dual in-line package with a quartz window for UV erasure. The “Q” designation indicates the quartz-windowed Cerdip version, allowing the device to be erased and reprogrammed.
The 27C512 family was widely used in embedded controllers, instrumentation, industrial systems, and computer firmware storage. CMOS construction provides lower power consumption compared to earlier NMOS EPROM generations. Programming requires a compatible EPROM programmer and the correct voltage parameters per the manufacturer’s datasheet.
Key Features
- Manufacturer: Fairchild
- Part number: FM27C512Q
- Memory organization: 64K x 8 (512 Kb)
- Technology: CMOS UVEPROM
- Package: 28-pin ceramic DIP (Cerdip)
- Quartz window for ultraviolet erasure
- Parallel data interface
- Common firmware and code storage device
Applications
- Industrial control firmware replacement
- Analytical and laboratory equipment repair
- Retro computer and arcade system restoration
- Embedded system development
- EPROM programming and archival duplication
- Collector and legacy semiconductor projects
- Educational microprocessor labs
Frequently Asked Questions
Is the chip erased or programmed?
The programmed state is not verified. UVEPROM devices must be erased with ultraviolet light before reprogramming.
What does the “Q” suffix mean?
The “Q” indicates the quartz-window
