27C16Q55/B

Overview

The 27C16Q55/B is a 16K-bit (2K x 8) Electrically Programmable Read-Only Memory (EPROM) manufactured by Rochester Electronics, LLC. It features parallel data output and operates with a typical access time of 550 ns. The component is housed in a 24-pin Dual In-line Package (DIP) with a window for UV erasure. This device serves as a non-volatile memory solution for storing firmware or fixed data in embedded systems.

Feature Summary

• Provides 16K-bit non-volatile storage capacity via electrically programmable technology
• Supports parallel interface architecture for direct data bus connection
• Includes a quartz window enabling ultraviolet light erasure for reprogramming

Applications

• Embedded system firmware storage
• Industrial control unit program memory
• Legacy hardware maintenance and replacement

Procurement Notes

Verify the integrity of the UV window seal to ensure proper erasability. Confirm the package type matches the required 24-DIP footprint. Check for any visible damage to pins or casing. Ensure the component meets the specific electrical requirements of the target circuit design before integration.

Selection Notes

Select this component when a 16K-bit EPROM is required for systems needing UV-erasable memory. Consider the 550 ns access speed for compatibility with existing clock speeds. Ensure the application supports the physical DIP-24 form factor and has provisions for UV erasure if reprogramming is necessary.

Part Context

Rochester Electronics specializes in providing lifecycle solutions for obsolete semiconductors. The 27C16Q55/B represents their offering of legacy EPROM technology, maintaining availability for critical infrastructure that relies on older memory standards. This part continues the functionality of original manufacturer designs under authorized distribution.

Replacement Considerations

Direct substitutes include other 27C16 series EPROMs from various manufacturers, provided they share the same pinout and electrical characteristics. Verify compatibility with existing socket configurations and voltage levels before swapping.