Sourcing 27-Year-Old Flash Memory for a US Industrial OEM Keeping Legacy Control Systems Alive

Customer Profile

A US-based industrial equipment OEM specializing in long-lifecycle automation and control systems. Their platforms rely on stable, legacy memory devices that support firmware essential for backward-compatible operation across thousands of deployed units.

Downtime or forced redesigns are costly both financially and operationally making legacy component continuity critical.

The Challenge

The customer urgently required the AT29C256-70JI, a 256-Kbit parallel Flash memory in a 32-PLCC package, a device long discontinued and unavailable through authorized channels.

The sourcing challenge included:

• EOL year unknown, but production stopped many years ago

• Only very old surplus stock exists globally

• High risk of remarked, pulled, or reconditioned parts on the open market

• Device is central to boot firmware & program storage; failures can shut down entire control modules

Without this part, the OEM faced major risks:

• Re-qualification of processors and memory interfaces

• Costly redesigns of well-established control boards

• Potential inability to support installed systems still in the field

The Product

AT29C256-70JI – 256-Kbit Parallel Flash Memory (PLCC-32)

A compact, durable, easy-to-socket memory device widely used in:

• Industrial control modules

• Factory automation systems

• Motor drives

• Test & measurement equipment

• Early telecom infrastructure

Known for long-term data retention and stable performance, making it ideal for legacy embedded designs.

Maketronics’ Solution

Leveraging our obsolete component sourcing network, Maketronics located:

• New, original, unused surplus stock

• Date code 98+ (27 years old)

• Preserved in exceptional condition; minor oxidation, no coplanarity issues, no rework signs

• Fully functional with no impact on fit, form, or function

To eliminate risks associated with ultra-aged components, the lot underwent comprehensive testing at an independent certified laboratory, as per AS6081 standards.

The entire lot passed without any anomalies; rare for components this old.

The Outcome

• The OEM received clean, fully preserved, new & unused 1998-date-code parts

• Devices passed all quality inspections

• No redesign required; legacy system life extended

• Production remained uninterrupted

• Customer secured a highly scarce part with confidence

Key Takeaway

Even when parts are nearly three decades old, Maketronics helps industrial OEMs source genuine, fully functional legacy components through a combination of specialized networks and rigorous third-party testing.

When aging supply chains threaten critical legacy systems, Maketronics ensures continuity; one obsolete part at a time.