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STMicroelectronics M27C512-15F6
- Part No.:
- M27C512-15F6
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 28-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C512-15F6.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,834
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Product details
Overview
M27C512-15F6 from STMicroelectronics is a 512 Kbit (64K × 8) UV-erasable EPROM in FDIP28W ceramic frit-seal package with transparent window, featuring 150 ns access time, 5 V ±10% read supply, and 12.75 V ±0.25 V programming voltage - used for firmware storage in legacy industrial controllers requiring field-erasable nonvolatile memory.
For engineers reviewing the M27C512-15F6 datasheet, M27C512-15F6 pinout, M27C512-15F6 application, or M27C512-15F6 equivalent, key selection criteria include UV erasure capability, two-line output control (E/G), CMOS standby current (100 µA), and Electronic Signature (20h/3Dh) for automated programmer identification.
Technical Context
The M27C512-15F6 operates in Read, Standby, Programming, Program Inhibit, and Electronic Signature modes. Its dual-control architecture uses Chip Enable (E) for device selection and Output Enable (G) for output gating - enabling low-power array expansion without bus contention.
Programming employs the PRESTO IIB algorithm with 100 µs pulses per byte and margin-mode verification at 6.25 V VCC and 12.75 V VPP; erasure requires ≥15 W·sec/cm² UV dose (2537 Å) applied within 2.5 cm of lamp for 15–20 minutes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8) - supports full 16-bit address space with byte-wide data interface |
| Access Time | 150 ns - defines maximum clock rate for synchronous read cycles in legacy microprocessor buses |
| Read Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails without regulation |
| Standby Current | 100 µA - enables low-power retention in battery-backed systems during idle periods |
| Programming Voltage | 12.75 V ±0.25 V - requires dedicated high-voltage supply rail; not derived from VCC |
| Electronic Signature | Manufacturer code 20h, Device code 3Dh - enables automatic algorithm selection in universal programmers |
| UV Erase Dose | ≥15 W·sec/cm² at 2537 Å - specifies minimum UV energy required for full bit reset |
Pinout & Package
FDIP28W: 28-pin ceramic frit-seal dual in-line package with UV-transparent quartz window; 0.6-inch body width; lead-free ECOPACK® compliant; JEDEC-standard pin layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; latched on E low for memory location selection |
| Q0–Q7 | Data Outputs | Bi-directional data bus pins used for both read output and program input (TTL-compatible) |
| E | Chip Enable | Primary device select; CMOS-high places device in 100 µA standby mode with outputs Hi-Z |
| G | Output Enable | Secondary output gate; independent of E to prevent bus contention in multi-chip memory arrays |
| VPP | Program Supply | 12.75 V programming voltage input; must be stable before and after VCC during write cycles |
| VCC | Supply Voltage | 5 V read supply; elevated to 6.25 V ±0.25 V during programming |
| VSS | Ground | Reference return for all signals; decoupling requires 0.1 µF ceramic + 4.7 µF bulk per 8 devices |
| NC | No Connect | Internally unconnected pins (e.g., A12/A13 in some variants); must remain floating |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + G) | Enables zero-bus-contention memory expansion while minimizing active power in deselected chips |
| Electronic Signature (20h/3Dh) | Allows fully automated device recognition and algorithm loading in production programmers |
| PRESTO IIB programming | Reduces full-array programming time to ≤6.5 s with built-in margin-mode verify and pulse optimization |
| UV erasability (FDIP28W) | Supports unlimited reprogramming via 15–20 min UV exposure - critical for prototyping and firmware iteration |
| ECOPACK® compliance | Lead-free construction meets RoHS and JEDEC JESD97 second-level interconnect marking requirements |
Applications
| Industrial PLC Firmware Storage | Avionics Boot ROM |
|---|---|
Use Scenario: Storing boot code and configuration tables in programmable logic controllers deployed in factory automation environments with infrequent firmware updates. IC Role / Device Role / Timing Role: Nonvolatile instruction storage with UV-erasable field update capability; accessed via 8086/80C186-style bus timing. Use Value: Enables on-site firmware revision without chip replacement - reducing downtime and spares inventory for legacy control systems. | Use Scenario: Holding certified flight-critical startup routines in airborne data acquisition units where long-term data retention and traceable erasure history are mandated. IC Role / Device Role / Timing Role: Read-only boot memory mapped at reset vector; verified via Electronic Signature prior to each power-on self-test. Use Value: UV erasure provides auditable, irreversible clearing of previous firmware - satisfying DO-254 traceability and configuration management requirements. |
| Military Communications Test Equipment | Medical Imaging Calibration Data |
Use Scenario: Storing protocol stacks and calibration constants in ground-based RF test sets requiring periodic field updates under controlled environmental conditions. IC Role / Device Role / Timing Role: OTP-capable EPROM used as secure, tamper-evident storage for mission-specific waveform definitions. Use Value: FDIP28W window allows lab-based UV erasure and reprogramming - eliminating need for soldering/desoldering during R&D iterations. | Use Scenario: Retaining gamma correction LUTs and sensor offset coefficients in X-ray detector modules operating in temperature-stable diagnostic suites. IC Role / Device Role / Timing Role: Static configuration memory accessed during system initialization; powered only during boot sequence. Use Value: 100 µA standby current prevents battery drain in backup-powered calibration storage - ensuring data integrity over 10+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C512-15DC | 150 ns access, 5 V read, but uses PDIP28 package without UV window; no erasure capability | Suitable only for one-time-programmed deployments where field updates are unnecessary | Select when cost sensitivity outweighs reprogrammability and UV window is not required |
| MX27C512PC-15 | Same 512 Kbit ×8 organization and 150 ns speed, but requires 21 V programming voltage and lacks Electronic Signature | Demands higher-voltage programming infrastructure and manual algorithm selection in production | Choose only if legacy MX27C512 tooling is already in place and signature-based auto-detection is not needed |
Compared with AM27C512-15DC and MX27C512PC-15, the M27C512-15F6 uniquely combines UV erasability, 12.75 V programming, and Electronic Signature - making it the sole option for field-upgradable, auto-identified, and lab-verified firmware storage in legacy systems.
Availability
M27C512-15F6 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, avionics boot ROM, and military communications test equipment requiring stable component supply across extended product lifecycles.
Supply support for M27C512-15F6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering automotive, industrial, and power discrete solutions with emphasis on reliability and longevity.
The M27C512 belongs to ST's legacy EPROM product line, designed specifically for applications demanding field-erasable nonvolatile memory with TTL/CMOS compatibility and robust programming verification - targeting industrial control, aerospace, and medical equipment manufacturers.
FAQ
What UV wavelength and exposure time are required to fully erase the M27C512-15F6?
The M27C512-15F6 requires short-wave ultraviolet light at 2537 Å with a minimum integrated dose of 15 W·sec/cm². Using a 12,000 µW/cm² lamp, full erasure is achieved in 15–20 minutes when the device is placed within 2.5 cm of the lamp source. Direct sunlight may cause partial erasure in ~1 week; room fluorescent lighting can erase it over ~3 years.
Can the M27C512-15F6 be programmed using standard 5 V logic levels?
No. Programming requires VCC = 6.25 V ±0.25 V and VPP = 12.75 V ±0.25 V applied simultaneously, with address/data inputs at TTL levels. The 5 V supply is valid only for read mode; applying 5 V to VPP during programming will fail to alter memory cells. Dedicated high-voltage programming hardware is mandatory.
How does the two-line output control (E and G) prevent bus contention in multi-chip memory systems?
E (Chip Enable) places deselected devices into 100 µA standby mode with outputs in high-impedance state, while G (Output Enable) independently gates outputs of selected devices. This ensures only one device drives the data bus at any time - even when multiple EPROMs share address/data lines - eliminating contention and reducing system-level noise and power spikes.
Is the M27C512-15F6 RoHS-compliant and lead-free?
Yes. The M27C512-15F6 is manufactured in ST's ECOPACK® package, which is fully lead-free and complies with RoHS Directive 2011/65/EU. JEDEC JESD97 second-level interconnect markings appear on both the package and inner box label, confirming environmental compliance and soldering profile specifications.
M27C512-15F6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 28-CDIP (0.600", 15.24mm) Window
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - UV
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 150 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-CDIP Frit Seal with Window
M27C512-15F6 FAQ
1.How can I place an order for M27C512-15F6 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C512-15F6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for M27C512-15F6 reliable?
The price and inventory of M27C512-15F6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C512-15F6 is usually 5 days.
3.What payment methods are accepted for M27C512-15F6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C512-15F6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C512-15F6?
M27C512-15F6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C512-15F6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for M27C512-15F6?
For technical support, including M27C512-15F6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C512-15F6 requirements.
6.How does Aetrix verify that M27C512-15F6 is sourced from the original manufacturer or authorized distributors?
All M27C512-15F6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M27C512-15F6 meets industry standards.
7.What is the process for return or replacement of M27C512-15F6?
All M27C512-15F6 units undergo pre-shipment inspection (PSI). If there is an issue with M27C512-15F6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The M27C512-15F6 part is unused and in its original packaging.
Return procedure for M27C512-15F6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C512-15F6 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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