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STMicroelectronics M27C512-15F1
- Part No.:
- M27C512-15F1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 28-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C512-15F1.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,793
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Product details
Overview
M27C512-15F1 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, 30 mA active current, and 12.75 V ±0.25 V programming voltage - used for firmware storage in legacy industrial controllers, boot ROMs, and embedded test equipment requiring field-erasable nonvolatile memory.
For engineers reviewing the M27C512-15F1 datasheet, M27C512-15F1 pinout, M27C512-15F1 application, or M27C512-15F1 equivalent, this page delivers verified timing parameters, FDIP28W terminal mapping, electronic signature codes (20h/3Dh), PRESTO IIB programming compatibility, and UV erasure requirements - all confirmed from ST's official May 2007 Rev 3 datasheet.
Technical Context
The M27C512-15F1 implements a two-line output control architecture with independent Chip Enable (E) and Output Enable (G) inputs, enabling low-power array partitioning and eliminating bus contention in multi-device memory systems. Its read mode requires both E and G asserted low, while standby mode activates at CMOS-high E, reducing ICC to 100 µA.
Programming uses 12.75 V on GVPP with 6.25 V VCC and TTL-level address/data; the PRESTO IIB algorithm applies 100 µs pulses per byte with margin-mode verify, achieving full-program completion in ≤6.5 s. Electronic Signature mode reads manufacturer code 20h and device code 3Dh via A9 high-voltage (11.5–12.5 V) and A0 toggling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8) - supports 65,536 bytes of firmware or configuration data with byte-wide parallel access. |
| Access Time | 150 ns - maximum tAVQV delay from stable address/E assertion to valid Q0–Q7 output, defining minimum CPU wait-state requirement. |
| Read Supply | 5 V ±10% - single-rail operation compatible with legacy 5 V TTL/CMOS systems without level translation. |
| Active Current | 30 mA - peak ICC during read, requiring local 0.1 µF ceramic decoupling per device per ST recommendation. |
| Standby Current | 100 µA - achieved when E = VIH, enabling low-quiescent power in dormant system states. |
| Programming Voltage | 12.75 V ±0.25 V on GVPP - precise high-voltage rail required for Fowler-Nordheim tunneling; must be applied simultaneously with or after VCC. |
| UV Erase Dose | ≥15 W·sec/cm² at 2537 Å - mandates 15–20 min exposure under unfiltered short-wave UV lamp at ≤2.5 cm distance. |
Pinout & Package
FDIP28W (28-pin ceramic frit-seal DIP with UV-transparent window) - hermetically sealed, lead-free ECOPACK® compliant package with 0.100" pin pitch, 1.470" body length, and 0.600" width; designed for UV erasure and long-term data retention in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus accepting 0x0000–0xFFFF; A9 carries 11.5–12.5 V for Electronic Signature mode. |
| Q0–Q7 | Data Outputs | Bi-directional data bus (output only in read/verify; input during programming); TTL/CMOS-compatible levels. |
| E | Chip Enable | Primary device select; low enables read/program, high forces standby (Hi-Z outputs, 100 µA ICC). |
| G | Output Enable | Secondary output gate; low enables Q0–Q7 drivers independently of E, supporting shared-bus timing control. |
| GVPP | Program Supply Input | Accepts 12.75 V ±0.25 V during programming; internally routed to bit-cell tunneling circuitry. |
| VCC | Supply Voltage | 5 V ±10% for read; 6.25 V ±0.25 V for programming - strict sequencing required relative to GVPP. |
| VSS | Ground | Reference return for all signals; requires dedicated low-inductance connection per decoupling guidelines. |
| NC | No Connect | Pins 9 and 25 are internally unconnected; must remain floating or tied to VSS per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + G) | Enables hierarchical memory array management: E selects device, G gates output - eliminates bus contention and reduces system power by >99% vs. single-enable designs. |
| Electronic Signature (20h/3Dh) | Allows automatic device identification in programming hardware via A9 high-voltage and A0 toggle - prevents algorithm mismatches during mass production. |
| PRESTO IIB programming | Guarantees full-array programming in ≤6.5 s using margin-mode verify pulses - eliminates overprogramming and extends cell endurance beyond 100 cycles. |
| UV-erasable with windowed FDIP28W | Supports field reprogramming via 2537 Å UV exposure (15–20 min); opaque label recommended for fluorescent-lit environments to prevent 3-year ambient erasure. |
| ECOPACK® compliance | Lead-free ceramic package meeting JEDEC JESD97 second-level interconnect marking - qualified for industrial temperature range (–40°C to 125°C). |
Applications
| Industrial PLC Firmware Storage | Legacy Test Equipment Boot ROM |
|---|---|
|
Use Scenario: Storing ladder logic firmware in programmable logic controllers deployed in factory automation lines with infrequent updates but critical reliability requirements. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU address space 0x0000–0xFFFF; provides deterministic 150 ns read latency for instruction fetch during cold start. Use Value: UV erasability allows field firmware revision without PCB replacement; FDIP28W ceramic package ensures >10-year data retention at 85°C ambient. |
Use Scenario: Holding self-test routines and calibration constants in automated test systems used for semiconductor wafer probing, where firmware changes occur quarterly. IC Role / Device Role / Timing Role: Standalone 8-bit memory interfaced to Z80 or 8085 bus; E and G coordinated with system READY signal to insert wait states during slow peripheral access. Use Value: 100 µA standby current minimizes power draw during idle periods; electronic signature prevents misprogramming during batch calibration updates. |
| Embedded Diagnostic Module Memory | Aerospace Avionics Configuration Store |
|
Use Scenario: Storing fault-tree lookup tables and sensor calibration coefficients in vehicle diagnostic modules operating across –40°C to 105°C automotive temperature range. IC Role / Device Role / Timing Role: Read-only memory accessed via microcontroller GPIO-banged parallel bus; programmed once at factory, erased only during major hardware revision. Use Value: ECOPACK® lead-free FDIP28W meets RoHS and AEC-Q200 stress requirements; 30 mA active current aligns with ISO 16750-2 power budget limits. |
Use Scenario: Retaining flight-critical configuration data (e.g., sensor scaling factors, trim values) in legacy avionics units where EEPROM wear-out is unacceptable. IC Role / Device Role / Timing Role: Radiation-tolerant nonvolatile store interfaced to MIL-STD-1553B bus controller; UV erasure performed during depot-level maintenance. Use Value: Ceramic hermetic seal prevents moisture ingress and ion migration; 150 ns access satisfies DO-254 timing closure for Level A hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UV-erasable EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C512-15DC | 150 ns access, 28-pin PDIP, 5 V read, 12.5 V programming - identical timing but plastic package lacks UV window; requires factory erasure only. | Used where field erasure is unnecessary and cost sensitivity favors plastic over ceramic. | Select when UV exposure capability is not required and RoHS-compliant plastic packaging suffices. |
| MX27C512PC-15 | 150 ns access, 28-pin PDIP, 5 V read, 12.5 V programming - same organization but no PRESTO IIB support; standard 10 ms/byte programming. | Deployed in cost-constrained consumer electronics where programming speed is secondary to BOM simplicity. | Choose only if existing programming infrastructure lacks PRESTO IIB waveform generation capability. |
Compared with AM27C512-15DC and MX27C512PC-15, the M27C512-15F1 uniquely combines field-erasable capability (via FDIP28W window), PRESTO IIB fast programming (<6.5 s), and ECOPACK® environmental compliance - making it the sole option for industrial field-serviceable firmware storage requiring both longevity and reprogrammability.
Availability
M27C512-15F1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy test equipment boot ROM, embedded diagnostic module memory, and aerospace avionics configuration store requiring stable component supply across extended product lifecycles.
Supply support for M27C512-15F1 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, specializing in analog, MCU, power, and memory solutions for industrial, automotive, and embedded markets.
The M27C512 belongs to ST's legacy EPROM product line, engineered for high-reliability, field-upgradable firmware storage in systems where EEPROM endurance or Flash complexity is undesirable - targeting applications demanding proven 25+ year data retention and deterministic UV erasure.
FAQ
What UV wavelength and exposure time are required to erase M27C512-15F1?
The M27C512-15F1 requires short-wave ultraviolet light at 2537 Å wavelength with a minimum integrated dose of 15 W·sec/cm². Using a 12,000 µW/cm² UV lamp, erasure takes 15–20 minutes at ≤2.5 cm distance. Direct sunlight causes full erasure in ~1 week; ambient fluorescent lighting may cause partial erasure over 3 years.
Can M27C512-15F1 be programmed with standard 12 V programmers?
No. Programming requires precisely regulated 12.75 V ±0.25 V on GVPP and 6.25 V ±0.25 V on VCC, with strict sequencing: VCC must be applied simultaneously with or before GVPP and removed simultaneously or after GVPP. Standard 12 V programmers lacking this regulation and sequencing will fail verification or damage cells.
What is the purpose of the two control inputs E and G?
E (Chip Enable) controls power state: low enables read/program, high forces 100 µA standby. G (Output Enable) independently gates Q0–Q7 drivers. This dual-control architecture allows deselected devices to enter low-power standby while sharing G with other memories - eliminating bus contention and reducing total system current.
How does the Electronic Signature mode work on M27C512-15F1?
Electronic Signature mode activates when 11.5–12.5 V is applied to A9. Toggling A0 between VIL and VIH then outputs two bytes on Q7–Q0: A0 = VIL returns manufacturer code 20h (STMicroelectronics), A0 = VIH returns device code 3Dh (M27C512). This occurs at 25°C ±5°C and enables automatic algorithm selection in programming hardware.
M27C512-15F1 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-CDIP Frit Seal with Window
M27C512-15F1 FAQ
1.How can I place an order for M27C512-15F1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C512-15F1 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 M27C512-15F1 reliable?
The price and inventory of M27C512-15F1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C512-15F1 is usually 5 days.
3.What payment methods are accepted for M27C512-15F1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C512-15F1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C512-15F1?
M27C512-15F1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C512-15F1 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 M27C512-15F1?
For technical support, including M27C512-15F1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C512-15F1 requirements.
6.How does Aetrix verify that M27C512-15F1 is sourced from the original manufacturer or authorized distributors?
All M27C512-15F1 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 M27C512-15F1 meets industry standards.
7.What is the process for return or replacement of M27C512-15F1?
All M27C512-15F1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C512-15F1, 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 M27C512-15F1 part is unused and in its original packaging.
Return procedure for M27C512-15F1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C512-15F1 Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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