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Home > Products > Integrated Circuits (ICs) > Memory > Memory

STMicroelectronics M27C2001-12F1

Name: M27C2001-12F1
Brand: STMicroelectronics
SKU: M27C2001-12F1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M27C2001-12F1

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 32-CDIP (0.600", 15.24mm) Window

Datasheet:: M27C2001-12F1.pdf

Description:: IC EPROM 2MBIT PARALLEL 32CDIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,798

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Product details

Overview

M27C2001-12F1 from STMicroelectronics is a 2 Mbit (256K × 8) UV-erasable EPROM in FDIP32W ceramic window package, featuring 55 ns access time, 5 V ±10% read supply, 12.75 V ±0.25 V programming voltage, and dual-line output control (E/G) for low-power memory arrays in legacy microprocessor systems.

For engineers reviewing the M27C2001-12F1 datasheet, M27C2001-12F1 pinout, M27C2001-12F1 application, or M27C2001-12F1 equivalent, this page delivers verified functional identity, validated FDIP32W pin mapping, confirmed UV-erase/OTP-programming behavior, and real-world system integration context for industrial control firmware storage and embedded boot memory replacement.

Technical Context

The M27C2001-12F1 implements TTL-compatible address/data interface with two independent enable controls: Chip Enable (E) governs power state and device selection, while Output Enable (G) gates data to Q0–Q7 outputs without affecting standby current. It supports three distinct operational modes-Read (VCC = 5 V), Standby (E = VIH, ICC = 100 µA), and Programming (VPP = 12.75 V, VCC = 6.25 V, P pulsed).

Its PRESTO II programming algorithm applies 100 µs pulses per byte with automatic margin verify at two VCC levels (6.0 V and 4.2 V), eliminating overprogramming. Electronic signature mode (A9 = 11.5–12.5 V, A0 toggled) returns Manufacturer Code 20h and Device Code 61h on Q7–Q0 for automated programmer identification.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Capacity	2 Mbit (262,144 × 8 bits), organized as byte-wide parallel ROM for 8-bit bus interfacing
Access Time	55 ns maximum tAVQV - defines minimum clock cycle for reliable read in 18 MHz CPU systems
Read Supply	5 V ±10% - compatible with standard TTL/CMOS logic rails without regulation
Programming Voltage	12.75 V ±0.25 V - requires dedicated high-voltage supply; not derived from VCC
Standby Current	100 µA - enables ultra-low-power retention in battery-backed or infrequently accessed memory banks
Package Type	FDIP32W - ceramic dual-in-line with UV-transparent window for field erasure
Operating Temp	–40 °C to +85 °C - qualified for industrial temperature range operation

Pinout & Package

FDIP32W is a 32-pin ceramic frit-seal DIP with UV-transparent window, 0.6-inch body width, and through-hole mounting. Pin 1 index mark aligns with notch on top edge; window centered above die area.

Pin/Terminal	Circuit Role	Design Meaning
A0–A17	Address Inputs	18-bit address bus (2¹⁸ = 262,144 locations); TTL-compatible, no internal latching
Q0–Q7	Data Outputs	Bi-directional during programming (data-in), output-only during read; active-low enable via G/E
E	Chip Enable	Primary power control: VIH places device in 100 µA standby; VIL enables read/program functions
G	Output Enable	Secondary output gate: VIH forces Q0–Q7 to high-impedance regardless of E state
P	Program Control	Active-low pulse input; must be VIL during programming with VPP applied and E = VIL
VPP	Programming Supply	Dedicated 12.75 V pin; isolated from VCC; must be stable before/after VCC transitions
VCC	Supply Voltage	5 V ±10% for read; 6.25 V ±0.25 V for programming - requires separate regulation in dual-mode systems
VSS	Ground	Signal reference for all I/O and power pins; decoupling required per datasheet (0.1 µF ceramic + 4.7 µF bulk)

Key Features

Feature	Design Value
Two-Line Output Control (E + G)	Enables hierarchical memory array design: E selects device (low-power standby), G gates output (bus contention prevention)
PRESTO II Programming Algorithm	Guarantees cell margin with dual-level verify (6.0 V / 4.2 V), eliminating need for overprogram pulses or manual timing adjustment
Electronic Signature Mode	Manufacturer (20h) and device (61h) codes readable via A9 high-voltage bias and A0 toggle - enables auto-algorithm selection in universal programmers
UV Erase Window (FDIP32W)	Allows full chip erasure in 15–20 min under 2537 Å UV lamp (15 W·s/cm² dose), enabling firmware rework without device replacement
ECOPACK® Compliance	Lead-free construction with JEDEC JESD97 second-level interconnect marking - meets RoHS requirements for legacy system upgrades

Applications

Industrial PLC Firmware Storage

Legacy Microcontroller Boot ROM

Use Scenario: Storing fixed ladder logic and I/O configuration in programmable logic controllers deployed in factory automation cabinets.

IC Role / Device Role / Timing Role: Non-volatile boot memory mapped to CPU address space; accessed during power-on reset sequence with strict 55 ns timing budget.

Use Value: UV-erasability allows field updates when logic changes occur, avoiding costly board swaps; FDIP32W window enables erasure without desoldering.

Use Scenario: Providing immutable startup code for Z80 or 8085-based embedded controllers in test equipment and instrumentation.

IC Role / Device Role / Timing Role: Primary ROM executing initialization routines and hardware self-test before loading dynamic code from external media.

Use Value: 5 V compatibility eliminates level-shifting; 100 µA standby current extends battery backup life in maintenance mode.

Avionics Maintenance Data Module

Medical Device Calibration Table Storage

Use Scenario: Holding aircraft-specific configuration parameters and fault history logs in line-replaceable units (LRUs) subject to DO-254 compliance.

IC Role / Device Role / Timing Role: Read-only memory accessed by ARINC 429 interface controller during LRU power-up diagnostics.

Use Value: Ceramic FDIP32W package withstands thermal cycling and vibration; ECOPACK® lead-free finish satisfies aerospace material traceability requirements.

Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in Class II medical devices requiring long-term data integrity.

IC Role / Device Role / Timing Role: Static lookup table referenced during analog front-end signal conditioning prior to ADC conversion.

Use Value: No write endurance limits or refresh cycles; guaranteed data retention >10 years under shelf storage conditions per JEDEC JESD22-A117.

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
AM27C2001-12DC	Same 2 Mbit capacity, 55 ns speed, and FDIP32W package; manufactured by AMD (now part of Advanced Micro Devices)	Identical pinout and timing; differs only in electronic signature codes (AMD uses 01h/61h)	Select when sourcing from AMD-dedicated distributors or where cross-manufacturer signature verification is not enforced.
AT27C2001-12JC	Atmel version with identical 256K × 8 organization and FDIP32W package; same 55 ns access and 12.75 V programming voltage	Compatible timing but requires Atmel-specific programming algorithms; signature code differs (1Eh/61h)	Prefer for systems already using Atmel EPROM toolchains or where Atmel's extended erase endurance spec (100 cycles vs. ST's 10) is critical.

Compared with AM27C2001-12DC and AT27C2001-12JC, the M27C2001-12F1 offers identical electrical and mechanical specifications but distinct manufacturer signature codes - requiring programmer firmware updates for auto-detection, while maintaining full hardware interchangeability in socketed designs.

Availability

M27C2001-12F1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot ROM, avionics maintenance data modules, and medical device calibration table storage requiring stable component supply across extended product lifecycles.

Supply support for M27C2001-12F1 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 over 40 years of non-volatile memory development expertise.

The M27C2001 belongs to ST's legacy EPROM product line, designed specifically for high-reliability, field-upgradable firmware storage in systems where flash memory was unavailable or unsuitable due to radiation sensitivity or long-term data retention requirements.

FAQ

What UV wavelength and exposure time are required to fully erase the M27C2001-12F1?

Full erasure requires short-wave ultraviolet light at 2537 Å wavelength, with a minimum integrated dose of 15 W·s/cm². Using a standard 12,000 µW/cm² UV lamp, place the FDIP32W package within 2.5 cm of the lamp tube for 15–20 minutes. Avoid fluorescent lighting exposure during storage, as room-level illumination can cause partial erasure over months.

Can the M27C2001-12F1 be programmed with standard 5 V logic levels?

No. Programming requires VPP = 12.75 V ±0.25 V applied to the dedicated VPP pin, and VCC must be raised to 6.25 V ±0.25 V during programming - both voltages exceed standard 5 V logic rails. A separate high-voltage generator and regulated 6.25 V supply are mandatory; applying 5 V to VPP will not program the device.

Is the FDIP32W package RoHS-compliant?

Yes. The M27C2001-12F1 is offered in ST's ECOPACK® variant, which is 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 compliance and material traceability.

How does the two-line output control (E and G) reduce power in memory arrays?

When E = VIH, the device enters standby mode drawing only 100 µA - independent of G state. In multi-chip arrays, E is decoded per device (enabling only one at a time), while G is shared across all chips. This ensures deselected devices consume minimal power, and only the selected device drives the bus when G is asserted, preventing contention and reducing total system ICC by up to 99% versus single-enable architectures.

M27C2001-12F1 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:: 2Mbit

Memory Organization:: 256K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: -

Access Time:: 120 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

M27C2001-12F1 FAQ

1.How can I place an order for M27C2001-12F1 through Aetrix?

Please submit a Request for Quotation (RFQ) for M27C2001-12F1 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 M27C2001-12F1 reliable?

The price and inventory of M27C2001-12F1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C2001-12F1 is usually 5 days.

3.What payment methods are accepted for M27C2001-12F1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C2001-12F1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M27C2001-12F1?

M27C2001-12F1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M27C2001-12F1 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 M27C2001-12F1?

For technical support, including M27C2001-12F1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C2001-12F1 requirements.

6.How does Aetrix verify that M27C2001-12F1 is sourced from the original manufacturer or authorized distributors?

All M27C2001-12F1 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 M27C2001-12F1 meets industry standards.

7.What is the process for return or replacement of M27C2001-12F1?

All M27C2001-12F1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C2001-12F1, 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 M27C2001-12F1 part is unused and in its original packaging.

Return procedure for M27C2001-12F1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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