M27512-10F1 STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
STMicroelectronics M27512-10F1 is a 512 Kbit (64K x 8) NMOS UV-erasable EPROM with a 100 ns access time, operating from a 5 V supply. It features a 28-pin DIP package, standard EPROM programming protocol, and CE/OE control for easy system integration. Available in through-hole DIP format with worldwide distribution.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- M27512-10F1 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of M27512-10F1?
- 512 Kbit (64K x 8) NMOS UV EPROM with 100 ns access time for fast embedded read cycles
- 5 V single-supply operation with standard OE/CE control, compatible with legacy 8-bit and 16-bit bus systems
- 28-pin DIP package with UV erase window enabling in-lab firmware reprogramming during development
What is M27512-10F1 used for?
The M27512-10F1 is used in legacy embedded systems requiring non-volatile code storage, such as industrial controllers, older PLC firmware ROMs, and retro-computing platforms that use 8-bit or 16-bit address buses. Its 100 ns access time supports direct bus interfacing with Z80, 8051, and 68000 family processors without wait states at typical bus speeds. It is also used in development and prototyping environments where firmware must be erased and reprogrammed repeatedly before transitioning to a one-time programmable OTP device.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the M27512-10F1 datasheet?
M27512-10F1 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for M27512-10F1?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the access time and supply voltage of the M27512-10F1?
The M27512-10F1 operates with a 100 ns maximum access time from a 5 V supply, enabling direct zero-wait-state interfacing with 8 MHz and slower 8-bit microprocessors such as the 8051 and Z80. The 5 V single-supply requirement is compatible with legacy TTL and NMOS logic families used in industrial and retro-computing systems.
How is the M27512-10F1 erased and how long does erasure take?
The M27512-10F1 is erased by exposing the die through its quartz window to UV light at 253.7 nm wavelength for a minimum of 15 to 20 minutes at an intensity of 15 W/cm2. After erasure, all 524,288 bits return to a logic 1 state, and the device can be reprogrammed using a standard 12.5 V EPROM programmer at 1 ms or 100 µs pulse algorithms.
Which legacy processors can directly interface with the M27512-10F1 without external glue logic?
The M27512-10F1's 64K x 8 organization and 5 V NMOS interface is directly bus-compatible with processors including the Intel 8085, Zilog Z80, MOS 6502, and Motorola 6809 running at up to 8 MHz, since the 100 ns access time meets their read cycle requirements. The 28-pin DIP pinout matches the industry-standard JEDEC EPROM footprint, so it drops into existing socket designs without PCB changes.
Is M27512-10F1 still in production and what modern alternatives exist for new designs?
The M27512-10F1 is a mature product primarily available as aftermarket stock; STMicroelectronics no longer actively promotes it for new designs. Modern alternatives include 512 Kbit serial Flash devices such as the AT25SF041 (SPI, 3.3 V, 8-pin SOIC) or parallel NOR Flash like the SST39SF040, which offer faster access at 55 ns, lower 3.3 V supply, and 100,000 erase cycle endurance versus the UV EPROM's unlimited optical cycles.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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