27C512-75DC

Overview

The 27C512-75DC is a 512 Kilobit (64 K x 8-Bit) CMOS EPROM manufactured by Rochester Electronics. It provides non-volatile memory storage with access speeds as fast as 55 ns, though the specific suffix '75' in this part number typically denotes a 75 ns speed grade within the standard 27C512 family. The device features a single +5V power supply and utilizes a parallel interface for data input and output. It is housed in a plastic DIP package, suitable for through-hole mounting on printed circuit boards.

Feature Summary

• Provides 512 Kilobit of non-volatile program storage using CMOS technology
• Supports single +5V power supply operation for simplified system design
• Features high-speed parallel access capabilities for efficient data retrieval
• Includes chip enable and output enable controls for flexible bus interfacing

Applications

• Embedded systems requiring persistent code storage
• Industrial control units needing reliable firmware retention
• Legacy hardware maintenance and replacement scenarios
• Microcontroller-based designs utilizing external program memory

Procurement Notes

Verify the exact speed grade associated with the '75' suffix against the manufacturer's current datasheet, as specifications may vary between original AMD/Atmel releases and Rochester Electronics re-markings. Confirm package integrity and pinout compatibility with existing PCB footprints before integration. Ensure static discharge precautions are observed during handling due to the CMOS construction of the EPROM array.

Selection Notes

Select this component when a 64K x 8-bit capacity is required for applications demanding non-volatile storage without the complexity of flash programming algorithms. Consider the physical DIP package constraints and verify that the system timing requirements align with the specified access speed. Evaluate thermal management needs based on the operating temperature range defined in the official documentation.

Part Context

This component belongs to the 27C512 series of CMOS EPROMs, originally developed by Advanced Micro Devices (AMD) and later Atmel. Rochester Electronics specializes in sourcing, testing, and distributing obsolete and hard-to-find electronic components, including legacy memory devices like this EPROM, ensuring availability for long-life products and industrial replacements.

Replacement Considerations

Direct electrical pin-compatible substitutes include other 27C512 variants from different manufacturers such as AT27C512 or M27C512, provided the speed grade meets or exceeds the system requirements. Verify voltage tolerance and package dimensions before substitution.