The M27C256B-70C6 from STMicroelectronics is a 256 Kbit (32K × 8) CMOS EPROM, available in both UV-erasable and OTP (One-Time Programmable) versions. With a 70 ns access time and TTL-compatible I/O, it’s well-suited for use in embedded systems, legacy equipment, and microprocessor-based designs.
Operating from a single 5 V supply, the device offers low power consumption and features an electronic signature mode for quick identification during programming. Its compact 32-pin PQCC package ensures easy integration into a wide range of circuit boards.
Whether you're maintaining existing systems or building specialised hardware, the M27C256B-70C6 provides reliable, high-speed non-volatile memory in a fully traceable and RoHS-compliant format.
Let’s explore what makes this part a solid choice for long-term memory stability.
Key Features of the M27C256B-70C6
32K x 8 EPROM Structure
Offers 256 Kbit total capacity, ideal for storing firmware, lookup tables, and configuration data.
Fast Access Time (70 ns)
Ensures quick data retrieval in timing-critical applications.
5 V ±10% Supply Voltage
Simple and efficient operation in read mode with minimal external circuitry.
Low Power Consumption
Just 30 mA active and 100 µA standby, reducing overall system power draw.
TTL-Compatible I/O
Seamlessly integrates into standard digital systems without level shifting.
Programmable with 12.75 V VPP
Compatible with widely used programming hardware.
Electronic Signature Support
Built-in identifier simplifies automated programming and quality checks.
RoHS-Compliant
Manufactured without hazardous substances for safe, global use.
Applications of the M27C256B-70C6
The M27C256B is suitable for a wide range of embedded and legacy memory applications, including:
- Embedded control systems and microprocessor designs
- Industrial equipment with legacy memory requirements
- Instrumentation and automotive ECU storage
- Custom firmware or BIOS ROM
- Replacement for older programmable memory modules
Why Choose Component Sense?
At Component Sense, we specialise in the fast, reliable, and sustainable supply of brand-new, fully traceable electronic components, such as the M27C256B-70C6.
Here’s why procurement teams around the world trust us:
- We hold over $1 billion worth of excess and obsolete (E&O) inventory. Our frequently updated stock ensures you can fulfil BOMs quickly and avoid production delays.
- Every part we supply is new, unused, and fully traceable back to the original manufacturer. We only source from trusted tier-one OEM and EMS partners with rigorous quality controls.
- Our inspection process, developed in collaboration with leading Scottish universities, ensures every part meets form, fit, and function standards. All stock comes with a 12-month warranty for peace of mind.
- We extend the lifecycle of components by redistributing E&O stock, helping reduce global electronic waste.
- Throughout the month of November, we’re planting 10 trees for every order, helping offset carbon impact for both buyers and sellers.
- Since 2001, we’ve delivered fast quotes (under 1 hour) and a 95% on-time delivery rate, helping to keep your supply chain running smoothly.
When sourcing the M27C256B-70C6, choose Component Sense for authenticity, sustainability, and service you can count on.