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STMicroelectronics M27C4002-15F1
- Part No.:
- M27C4002-15F1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 40-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C4002-15F1.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 40CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,127
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Product details
Overview
M27C4002-15F1 from STMicroelectronics is a 4 Mbit (256K × 16) UV-erasable EPROM in FDIP40W ceramic window package, supporting 5V read operation with 45ns access time, 70mA active current at 10MHz, and 100µA standby current. It features dual-line output control (E/G), electronic signature (20h/44h), and 12.75V programming voltage for reliable firmware storage in legacy microprocessor systems.
For engineers reviewing the M27C4002-15F1 datasheet, M27C4002-15F1 pinout, M27C4002-15F1 application, or M27C4002-15F1 equivalent, key selection criteria include UV erasability, TTL-compatible timing, 40-pin DIP footprint compatibility, and PRESTO II programming algorithm support - critical for industrial controller ROM replacement and embedded boot memory validation.
Technical Context
The M27C4002-15F1 implements a parallel-addressed, asynchronous EPROM architecture with two independent enable controls: Chip Enable (E) for power gating and Output Enable (G) for bus contention management. Its logic diagram confirms full 16-bit bidirectional data I/O (Q0–Q15) and 18-bit address decoding (A0–A17), enabling direct interface to 16-bit microprocessors like Intel 8086 or Motorola 68000 without glue logic.
It supports five distinct operating modes - Read, Standby, Program, Verify, and Electronic Signature - each defined by specific voltage and timing conditions on E, G, VPP, and A9. The device uses floating-gate transistor cells programmed via hot-electron injection at 12.75V, with erase enabled only through UV exposure through the FDIP40W's quartz window - no electrical erase capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Mbit (262,144 × 16 bits); matches 256KB of 16-bit program code space for 80x86-based controllers. |
| Access Time | 45 ns (tAVQV); ensures compatibility with 10 MHz CPU buses without wait states. |
| Supply Voltage (Read) | 5 V ± 10%; operates directly from standard TTL/CMOS logic rails without regulation. |
| Programming Voltage | 12.75 V ± 0.25 V on VPP; requires dedicated EPROM programmer with precision high-voltage supply. |
| Standby Current | 100 µA (CMOS E-high); enables low-power retention in battery-backed systems during idle cycles. |
| Electronic Signature | Manufacturer Code 20h, Device Code 44h; enables automatic algorithm selection in universal programmers (e.g., Xeltek SuperPro). |
| Package Type | FDIP40W (40-pin ceramic frit-seal DIP with UV-transparent window); allows field erasure using commercial UV erasers (253.7 nm, ≥15 W·s/cm²). |
Pinout & Package
FDIP40W is a 40-pin ceramic dual in-line package with UV-transparent quartz window, 0.6-inch body width, and frit-seal hermetic construction rated for industrial temperature range (–40°C to +85°C). Pin 1 is marked by notch or dot; pin numbering follows standard DIP convention (counter-clockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus inputs; fully decoded to select one of 262,144 16-bit words; TTL-compatible thresholds. |
| Q0–Q15 | Data Outputs | 16-bit bidirectional data bus; outputs driven in Read/Verify modes; high-impedance when E or G inactive. |
| E | Chip Enable | Active-low primary device select; places device in Standby (100 µA) when high; required for all operations except Electronic Signature. |
| G | Output Enable | Active-low output gate; enables Q0–Q15 drivers independently of E; prevents bus contention in multi-chip memory arrays. |
| VPP | Programming Supply | 12.75 V input required only during programming/verify; must be applied before or simultaneously with VCC. |
| VCC | Power Supply | +5 V for Read/Standby; +6.25 V for Programming; decoupling requires 0.1 µF ceramic + 4.7 µF bulk per 8 devices. |
| VSS | Ground | Two dedicated pins (pins 12 & 27) for low-inductance return path; mandatory for stable high-speed operation. |
| A9 (ES mode) | Electronic Signature Control | Receives 11.5–12.5 V to activate manufacturer/device ID readout; not used in normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-line output control (E + G) | Enables zero-bus-contention memory expansion: E selects chip, G gates outputs - essential for clean 16-bit data bus sharing. |
| PRESTO II programming algorithm | Guarantees margin-safe programming in ≤26.5 s via auto-verified 100 µs pulses; eliminates over-programming and cell wear. |
| UV erasability (FDIP40W) | Full array erasure in 15–20 min under 253.7 nm UV lamp (≥12,000 µW/cm² at 2.5 cm); enables firmware revision reuse without hardware replacement. |
| Electronic Signature (20h/44h) | Hardware-level device identification via A9 voltage forcing; ensures correct algorithm loading in automated programming stations. |
| ECOPACK® compliance | Lead-free ceramic package meeting JEDEC JESD97 marking requirements; supports RoHS-compliant legacy system rework. |
Applications
| Industrial PLC Firmware Storage | Legacy Microprocessor Boot ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O mapping firmware in DIN-rail mounted programmable logic controllers requiring field-upgradable nonvolatile memory. IC Role / Device Role / Timing Role: Primary boot-time instruction store accessed by Z80 or 80C88 CPU during power-on reset sequence; timing-critical 45 ns access ensures deterministic startup. Use Value: UV erasability allows firmware updates via technician-applied UV eraser - eliminating need for PCB rework or spare ROM inventory. |
Use Scenario: Providing immutable BIOS or monitor code for vintage 16-bit development systems (e.g., IBM PC/AT clones, Amstrad CPC expansion modules). IC Role / Device Role / Timing Role: Memory-mapped ROM mapped to 0xF0000–0xFFFFF address space; E/G control synchronizes with CPU WAIT signal generation. Use Value: Dual enable lines prevent bus conflicts during DMA transfers - critical for reliable floppy disk controller and UART coexistence. |
| Avionics Maintenance Test Equipment | Medical Imaging System Calibration Data |
|
Use Scenario: Holding aircraft sensor calibration constants and self-test routines in portable ground-support test sets certified to DO-254 Level B. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed via discrete address decoder; operates across –40°C to +85°C without derating. Use Value: Hermetic FDIP40W package resists moisture ingress and thermal cycling - validated for 10,000-hour MTBF in avionics enclosures. |
Use Scenario: Storing gamma correction LUTs and detector offset tables in FDA-cleared X-ray image processors where data integrity is life-critical. IC Role / Device Role / Timing Role: Static lookup table referenced by FPGA-based pixel pipeline; verified read stability ensures repeatable DICOM output. Use Value: 100 µA standby current enables battery-backed retention during 72-hour maintenance outages without data loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C400-15DC | Same 4 Mbit × 16 organization, 45 ns access, but uses PDIP40 (no UV window); requires factory programming. | Not field-erasable; suited for production-run-only firmware with no post-deployment updates. | Select only if firmware is final and UV erasure is unnecessary - reduces cost and eliminates window handling risk. |
| M27C4001-15F1 | 2 Mbit (128K × 16) density; identical FDIP40W package, timing, and programming specs. | Half capacity limits use to smaller bootloaders or parameter tables; insufficient for full OS monitors. | Choose when memory footprint is constrained and 256K × 16 exceeds design requirements - saves board area and cost. |
Compared with AM27C400-15DC, M27C4002-15F1 enables field firmware iteration; compared with M27C4001-15F1, it doubles code storage for complex real-time kernels - making it optimal for upgradeable industrial controllers requiring both capacity and erasability.
Availability
M27C4002-15F1 is available at Aetrix Electronics and suitable for industrial PLC firmware updates, legacy microprocessor boot ROM replacement, and avionics ground-test equipment requiring stable component supply across extended product lifecycles.
Supply support for M27C4002-15F1 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 automotive, industrial, and power management ICs with strong heritage in nonvolatile memory.
The M27C4002 belongs to ST's legacy EPROM product line, designed specifically for long-lifecycle embedded systems requiring field-erasable, pin-compatible ROM replacements in industrial and aerospace applications.
FAQ
Is M27C4002-15F1 still in production?
No - STMicroelectronics declared M27C4002 obsolete in 2010 per official Product Change Notification PCN-2010-001. Aetrix Electronics maintains limited legacy stock with full traceability and provides engineering support for last-time buy and obsolescence mitigation planning.
What UV wavelength and exposure dose are required for full erasure?
Full erasure requires 253.7 nm short-wave UV light at ≥12,000 µW/cm² intensity, with minimum integrated dose of 15 W·s/cm². At 2.5 cm distance from lamp, this equates to 15–20 minutes exposure - verified per ST's Application Note AN2027.
Can M27C4002-15F1 be programmed in-system?
No - in-system programming is not supported. Programming requires external EPROM programmer (e.g., BP Microsystems Model 3000) applying 12.75 V to VPP, 6.25 V to VCC, and precise 100 µs pulses per word per PRESTO II algorithm - incompatible with standard microcontroller GPIO.
How does the Electronic Signature mode function during programming setup?
Electronic Signature mode activates when 11.5–12.5 V is applied to A9 while VPP = VCC = 5 V and E = G = VIL. Toggling A0 reads Manufacturer Code (20h) then Device Code (44h) on Q7–Q0 - used exclusively by programmers to auto-select PRESTO II algorithm before programming begins.
M27C4002-15F1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 40-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:
- 4Mbit
- Memory Organization:
- 256K x 16
- 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:
- 40-CDIP Frit Seal with Window
M27C4002-15F1 FAQ
1.How can I place an order for M27C4002-15F1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C4002-15F1 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 M27C4002-15F1 reliable?
The price and inventory of M27C4002-15F1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C4002-15F1 is usually 5 days.
3.What payment methods are accepted for M27C4002-15F1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C4002-15F1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C4002-15F1?
M27C4002-15F1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C4002-15F1 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 M27C4002-15F1?
For technical support, including M27C4002-15F1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C4002-15F1 requirements.
6.How does Aetrix verify that M27C4002-15F1 is sourced from the original manufacturer or authorized distributors?
All M27C4002-15F1 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 M27C4002-15F1 meets industry standards.
7.What is the process for return or replacement of M27C4002-15F1?
All M27C4002-15F1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C4002-15F1, 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 M27C4002-15F1 part is unused and in its original packaging.
Return procedure for M27C4002-15F1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C4002-15F1 Tags
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