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STMicroelectronics M27C4001-15F1
- Part No.:
- M27C4001-15F1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C4001-15F1.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
M27C4001-15F1 from STMicroelectronics is a 4 Mbit (512K × 8) UV-erasable EPROM in FDIP32W ceramic window package, operating at 5V ±10%, with 35 ns access time, 30 mA active current, and 100 µA standby current. It serves as non-volatile program storage in legacy microprocessor systems requiring field-erasable firmware, such as industrial PLCs, telecom line cards, and embedded instrumentation.
For engineers reviewing the M27C4001-15F1 datasheet, M27C4001-15F1 pinout, M27C4001-15F1 application, or M27C4001-15F1 equivalent, key selection criteria include UV erasure capability, TTL-compatible two-line output control (E/G), 12.75V programming voltage, PRESTO II algorithm support, and ECOPACK®-compliant lead-free packaging.
Technical Context
The M27C4001-15F1 implements a classic NMOS EPROM architecture with dual-control read enable logic: Chip Enable (E) gates power and device selection, while Output Enable (G) independently controls output bus drive. Its logic diagram confirms full 19-bit address decoding (A0–A18) and 8-bit bidirectional data I/O (Q0–Q7) during programming.
Programming uses a 100 µs pulse per word at VPP = 12.75V ±0.25V and VCC = 6.25V ±0.25V, with automatic margin verification via PRESTO II algorithm; erasure requires UV exposure (2537 Å, ≥15 W·sec/cm²) through the FDIP32W's quartz window, enabling full reprogrammability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Mbit (524,288 × 8 bits) - supports full 19-bit addressing for large firmware images |
| Access Time | 35 ns - enables direct interface with 20–25 MHz microprocessors without wait states |
| Supply Voltage (Read) | 5V ±10% - compatible with standard TTL/CMOS logic rails and legacy 5V system designs |
| Active Current | 30 mA at 5 MHz - defines peak power draw during instruction fetch bursts |
| Standby Current | 100 µA - ensures low quiescent power in idle microcontroller subsystems |
| Programming Voltage | 12.75V ±0.25V - requires dedicated high-voltage supply rail or charge pump circuitry |
| Electronic Signature | Manufacturer Code 20h / Device Code 41h - enables automated programmer identification and algorithm selection |
Pinout & Package
FDIP32W: 32-pin ceramic frit-seal DIP with UV-transparent quartz window, 0.6-inch width, ECOPACK®-compliant lead-free finish, JEDEC MS-015AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit parallel address bus; fully decoded to select one of 524,288 bytes |
| Q0–Q7 | Data Inputs/Outputs | Bidirectional 8-bit data path: outputs during read, inputs during programming |
| E | Chip Enable | Active-low primary device select; places device in standby (Hi-Z outputs) when high |
| G | Output Enable | Active-low secondary output gate; enables Q0–Q7 drivers independent of E state |
| VPP | Programming Supply | 12.75V input required only during programming/verify; must be stable before VCC ramp |
| VCC | Power Supply | 5V for read mode; 6.25V for programming - strict sequencing required vs. VPP |
| VSS | Ground | Reference return for all signals; decoupling capacitor (0.1 µF) required adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| UV Erasability | Full array erasure in 15–20 min using 2537 Å UV lamp (≥15 W·sec/cm²), enabling firmware updates in field-deployed equipment |
| Two-Line Output Control | Independent E (device select) and G (output enable) pins prevent bus contention in multi-chip memory arrays |
| PRESTO II Programming | Guaranteed margin programming with auto-verify per byte eliminates over-programming and extends cell endurance |
| Electronic Signature | Read-only manufacturer (20h) and device (41h) codes on Q7–Q0 via A9/A0 handshake - ensures programmer compatibility |
| ECOPACK® Compliance | Lead-free ceramic package meeting JEDEC JESD97 second-level interconnect marking requirements |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot ROM |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile boot memory mapped to CPU address space; accessed during power-on reset and runtime code execution. Use Value: UV erasability allows field updates without board removal; 35 ns access time supports real-time scan cycle timing in sub-millisecond PLC cycles. | Use Scenario: Holding boot loader and protocol stack initialization code in T1/E1 line interface units operating in central office switching systems. IC Role / Device Role / Timing Role: Primary ROM for microcontroller initialization sequence; selected via address decoder during reset vector fetch. Use Value: FDIP32W ceramic package withstands thermal cycling in telecom chassis; 100 µA standby current minimizes backplane power budget impact. |
| Embedded Instrumentation Calibration Data | Legacy Medical Device BIOS |
Use Scenario: Storing sensor calibration coefficients and linearization tables in portable oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Read-only data storage accessed by DSP during self-test and measurement setup routines. Use Value: Two-line control (E/G) isolates calibration data bus from main processor bus, preventing corruption during concurrent operations. | Use Scenario: Hosting BIOS initialization code and hardware abstraction layer in early-generation patient monitors and imaging controllers. IC Role / Device Role / Timing Role: System boot ROM executing immediately after power-on; mapped to fixed 0x000000–0x07FFFF address range. Use Value: Ceramic FDIP32W package provides long-term data retention (>20 years) under medical-grade environmental stress screening conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM-based firmware storage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C4001-15DC | Same 4 Mbit organization and 35 ns speed, but AMD-manufactured; requires 12.5V ±0.25V VPP and different electronic signature (01h/41h) | No UV window - PDIP32 package only; not field-erasable | Select only if UV erasure is unnecessary and AMD toolchain compatibility is required |
| AT27C4001-15PU | Atmel version with identical pinout and AC specs; VPP tolerance wider (12.5V ±0.5V); higher max standby current (200 µA) | PLCC32 package standard; no FDIP32W option available | Prefer for surface-mount designs where ceramic DIP footprint is incompatible with PCB layout |
Compared with AM27C4001-15DC and AT27C4001-15PU, the M27C4001-15F1 uniquely combines UV erasability, FDIP32W ceramic reliability, and ST's PRESTO II programming margin - making it the sole choice for field-upgradable 5V microprocessor systems requiring long-term data retention and mechanical robustness.
Availability
M27C4001-15F1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card boot ROM, and embedded instrumentation calibration data requiring stable component supply across extended product lifecycles.
Supply support for M27C4001-15F1 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 non-volatile memory design.
The M27C4001 belongs to ST's legacy EPROM product line, engineered specifically for reliable, field-erasable firmware storage in mission-critical 5V microprocessor systems where data integrity and long-term retention are paramount.
FAQ
What UV wavelength and exposure time are required to erase the M27C4001-15F1?
The M27C4001-15F1 requires short-wave ultraviolet light at 2537 Å wavelength. Erasure needs a minimum integrated dose of 15 W·sec/cm² - achieved in 15–20 minutes using a 12,000 µW/cm² lamp with the device placed within 2.5 cm of the source. Fluorescent lighting or sunlight causes gradual erasure over months or weeks and must be blocked with opaque labels during storage.
Can the M27C4001-15F1 be programmed in-system, or does it require a dedicated EPROM programmer?
The M27C4001-15F1 requires a dedicated EPROM programmer supporting the PRESTO II algorithm and capable of delivering precise 12.75V ±0.25V to VPP and 6.25V ±0.25V to VCC with correct power sequencing. In-system programming is not supported due to lack of internal charge pumps or serial interface - all programming must occur in a socketed, powered fixture with verified voltage rails and timing waveforms.
What is the purpose of the two-line output control (E and G pins), and how should they be used in a multi-chip memory array?
E (Chip Enable) and G (Output Enable) provide independent control: E selects the device and powers its core, while G gates only the output drivers. In multi-chip arrays, decode E per device to minimize standby current, and tie G to the system READ line globally - ensuring deselected chips enter low-power standby (100 µA) while only the selected chip drives the data bus, eliminating contention and reducing noise.
Is the M27C4001-15F1 still manufactured, or is it obsolete? What lifecycle support does Aetrix provide?
The M27C4001-15F1 is marked "Obsolete Product(s)" by STMicroelectronics, but Aetrix Electronics maintains active inventory and authorized distribution channels for this part. We provide full lifecycle support including last-time-buy planning, obsolescence forecasting, cross-reference guidance, and traceable lot-controlled sourcing - ensuring continuity for legacy industrial, telecom, and medical systems with multi-decade service requirements.
M27C4001-15F1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 32-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:
- 512K 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:
- 32-CDIP Frit Seal with Window
M27C4001-15F1 FAQ
1.How can I place an order for M27C4001-15F1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C4001-15F1 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 M27C4001-15F1 reliable?
The price and inventory of M27C4001-15F1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C4001-15F1 is usually 5 days.
3.What payment methods are accepted for M27C4001-15F1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C4001-15F1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C4001-15F1?
M27C4001-15F1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C4001-15F1 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 M27C4001-15F1?
For technical support, including M27C4001-15F1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C4001-15F1 requirements.
6.How does Aetrix verify that M27C4001-15F1 is sourced from the original manufacturer or authorized distributors?
All M27C4001-15F1 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 M27C4001-15F1 meets industry standards.
7.What is the process for return or replacement of M27C4001-15F1?
All M27C4001-15F1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C4001-15F1, 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 M27C4001-15F1 part is unused and in its original packaging.
Return procedure for M27C4001-15F1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C4001-15F1 Tags
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