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

STMicroelectronics M27C1001-12F6

Name: M27C1001-12F6
Brand: STMicroelectronics
SKU: M27C1001-12F6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M27C1001-12F6

Manufacturer:: STMicroelectronics

Category:: Memory

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

Datasheet:: M27C1001-12F6.pdf

Description:: IC EPROM 1MBIT PARALLEL 32CDIP

Quantity:: RFQ Add To RFQ list

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Inventory:1,880

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Product details

Overview

M27C1001-12F6 from STMicroelectronics is a 1 Mbit (131,072 × 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 controllers and telecom line cards.

For engineers reviewing the M27C1001-12F6 datasheet, M27C1001-12F6 pinout, M27C1001-12F6 application, or M27C1001-12F6 equivalent, key selection criteria include UV erasure capability, TTL-compatible control timing (tELQV = 35 ns), dual-line enable architecture (E/G), 12.75 V programming voltage, and FDIP32W package compatibility with UV exposure fixtures.

Technical Context

The M27C1001-12F6 implements a two-control-line memory interface with independent Chip Enable (E) for power gating and Output Enable (G) for output bus control-enabling low-power array operation and eliminating bus contention. Its UV-erasable floating-gate MOS structure supports up to 100 erase/write cycles with verified 15 W·s/cm² minimum UV dose (2537 Å).

Programming uses 100 µs pulses at VPP = 12.75 V ±0.25 V and VCC = 6.25 V ±0.25 V, with PRESTO II algorithm ensuring margin-safe cell programming via automatic verify-in-margin-mode. Electronic signature mode (A9 = 11.5–12.5 V, VPP = VCC = 5 V) outputs Manufacturer Code 20h and Device Code 05h on Q7–Q0.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (131,072 words × 8 bits); supports full 17-bit address space (A0–A16)
Access Time	35 ns (tAVQV); enables direct interface with 20 MHz CPU buses without wait states
Supply Voltage	5 V ±10% in read mode; ensures compatibility with legacy 5 V TTL/CMOS systems
Active Current	30 mA at 5 MHz; defines maximum dynamic power draw during instruction fetch bursts
Standby Current	100 µA (CMOS E high); reduces idle power by 300× vs active mode for battery-backed systems
Programming Voltage	VPP = 12.75 V ±0.25 V; requires dedicated HV supply rail, not derived from VCC
UV Erase Dose	≥15 W·s/cm² at 2537 Å; validated for full bit restoration within 15–20 min under 12,000 µW/cm² lamp

Pinout & Package

FDIP32W: 32-pin ceramic dual in-line package with UV-transparent quartz window (41.73 mm × 15.24 mm × 5.72 mm), frit-sealed for hermetic reliability and repeatable UV erasure. Designed for socket-mounting in EPROM programmers and field-replaceable modules.

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit parallel address bus; A9 used as VID select in Electronic Signature mode
Q0–Q7	Data Outputs	8-bit bidirectional data bus; outputs valid only when E = G = VIL in read mode
E	Chip Enable	Primary device-select input; CMOS high (VIH > VCC – 0.2 V) forces standby mode (100 µA)
G	Output Enable	Secondary output gate; allows shared G-bus across memory arrays while keeping deselected devices in low-power state
P	Program Control	Active-low pulse input; initiates programming only when VPP = 12.75 V and E = VIL
VPP	Programming Supply	Dedicated 12.75 V ±0.25 V input; must be applied simultaneously with or after VCC and removed before or with VCC
VCC	Supply Voltage	5 V ±10% for read; 6.25 V ±0.25 V for programming-requires separate regulation
VSS	Ground	Reference for all I/O and internal logic; decoupling requires 0.1 µF ceramic + 4.7 µF bulk per 8 devices
NC	No Connect	Pin 17 (LCCC32W) and Pin 9 (PDIP32) are internally unconnected; must remain floating

Key Features

Feature	Design Value
Two-line output control (E + G)	Enables zero-bus-contention memory expansion and 300× active-to-standby current reduction
Electronic Signature mode	Reads manufacturer code 20h and device code 05h via A9 voltage forcing-enables auto-algorithm selection in programmers
PRESTO II programming algorithm	Guarantees margin-safe programming in ≤13 s using 100 µs pulses and verify-in-margin-mode-no overprogram risk
UV erasure endurance	Validated for ≥100 full-erase cycles with 15 W·s/cm² dose; window integrity maintained over 20-year shelf life
TTL/CMOS compatible inputs	VIL ≤ 0.8 V, VIH ≥ 2 V (TTL) or ≥ VCC + 0.5 V (CMOS); supports mixed-logic system interfacing

Applications

Industrial PLC Firmware Storage

Legacy Telecom Line Card Boot ROM

Use Scenario: Storing firmware for programmable logic controllers deployed in factory automation cabinets with ambient temperatures up to 70°C.

IC Role / Device Role / Timing Role: Non-volatile boot memory mapped to CPU address space; accessed during power-on reset with tAVQV = 35 ns guaranteeing deterministic boot latency.

Use Value: UV erasability allows field firmware updates without board removal; FDIP32W window enables in-situ erasure using handheld UV lamps.

Use Scenario: Holding boot code and protocol stacks in T1/E1 line interface cards installed in central office switching racks.

IC Role / Device Role / Timing Role: Read-only instruction store executing directly from address lines A0–A16; dual E/G control prevents bus conflicts during hot-swap maintenance.

Use Value: 100 µA standby current extends backup battery life during AC power loss; electronic signature (20h/05h) validates correct device loading in automated test fixtures.

Military Avionics Configuration Memory

Medical Imaging System Calibration Data

Use Scenario: Retaining flight-critical configuration parameters in airborne navigation computers operating from –40°C to 85°C.

IC Role / Device Role / Timing Role: OTP-configurable memory (when used in PDIP32 variant) or UV-erasable parameter store; accessed via dedicated microcontroller bus with strict tGLQV ≤ 25 ns timing.

Use Value: FDIP32W hermetic seal and –40°C to 125°C rating ensure reliability under thermal shock; 12.75 V programming supports secure reconfiguration in ground maintenance.

Use Scenario: Storing gamma correction tables and sensor calibration coefficients in X-ray detector modules requiring long-term data retention.

IC Role / Device Role / Timing Role: Static lookup table memory accessed during image acquisition initialization; standby mode minimizes leakage-induced data drift.

Use Value: 15 W·s/cm² UV erasure tolerance ensures >20-year data integrity; Q0–Q7 outputs drive precision DAC references with VOL ≤ 0.4 V at 2.1 mA.

Equivalent & Alternatives

The following parts are listed as comparable options for similar EPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AM27C1001-35DC	Same 1 Mbit ×8 organization, 35 ns access, 5 V supply; but uses AMD's proprietary programming algorithm and signature codes (01h/05h)	Requires AMD-specific programmer firmware; no cross-programmer compatibility with ST tools	Select only if existing AMD-based programming infrastructure is in place
MX27C1001-35PC	Identical pinout and DC specs; AC timing slightly looser (tELQV max = 45 ns vs 35 ns)	Marginally higher boot latency in 20 MHz CPU systems; may require wait-state insertion	Acceptable for cost-sensitive designs where 10 ns timing margin is available

Compared with AM27C1001-35DC and MX27C1001-35PC, the M27C1001-12F6 delivers tighter 35 ns read timing, ST-specific PRESTO II programming with guaranteed margin, and FDIP32W package optimized for repeatable UV erasure-making it preferred for field-upgradable industrial and telecom systems.

Availability

M27C1001-12F6 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy telecom line card boot ROM, and military avionics configuration memory requiring stable component supply across extended product lifecycles.

Supply support for M27C1001-12F6 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 discrete technologies with over 40 years of non-volatile memory innovation.

The M27C1001 belongs to ST's legacy EPROM product line, designed specifically for high-reliability, field-erasable firmware storage in microprocessor-based systems where flash memory was not yet mature or qualified.

FAQ

What UV wavelength and exposure time are required to fully erase the M27C1001-12F6?

Full erasure requires short-wave ultraviolet light at 2537 Å with a minimum integrated dose of 15 W·s/cm². Using a standard 12,000 µW/cm² UV lamp placed within 2.5 cm of the FDIP32W window, erasure is complete in 15–20 minutes. Room fluorescent lighting (3000–4000 Å) can cause partial erasure over ~3 years and must be blocked with opaque labels during storage.

Can the M27C1001-12F6 be programmed in-system, or does it require a dedicated EPROM programmer?

The M27C1001-12F6 requires a dedicated EPROM programmer capable of delivering 12.75 V ±0.25 V to VPP, 6.25 V ±0.25 V to VCC, and generating precise 100 µs programming pulses on P while monitoring Q0–Q7 for verify-in-margin-mode. In-system programming is not supported due to lack of internal charge pumps and strict HV sequencing requirements.

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

When E is high (VIH > VCC – 0.2 V), the device enters standby mode drawing only 100 µA regardless of G state-cutting active current by 300×. G remains functional only when E is low, allowing multiple devices to share a common G bus while keeping deselected units in ultra-low-power state, minimizing total array quiescent current.

Is the FDIP32W package RoHS-compliant, and what is its moisture sensitivity level (MSL)?

The FDIP32W package is exempt from RoHS lead restrictions under Annex III (high-melting-temperature solder exception) due to its ceramic frit-seal construction requiring Pb-based glass. It has no moisture sensitivity level (MSL) rating, as hermetic ceramic packages are not subject to moisture absorption-eliminating bake requirements prior to soldering.

M27C1001-12F6 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:: 1Mbit

Memory Organization:: 128K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: -

Access Time:: 120 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 32-CDIP Frit Seal with Window

M27C1001-12F6 FAQ

1.How can I place an order for M27C1001-12F6 through Aetrix?

Please submit a Request for Quotation (RFQ) for M27C1001-12F6 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 M27C1001-12F6 reliable?

The price and inventory of M27C1001-12F6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C1001-12F6 is usually 5 days.

3.What payment methods are accepted for M27C1001-12F6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C1001-12F6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M27C1001-12F6?

M27C1001-12F6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M27C1001-12F6 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 M27C1001-12F6?

For technical support, including M27C1001-12F6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C1001-12F6 requirements.

6.How does Aetrix verify that M27C1001-12F6 is sourced from the original manufacturer or authorized distributors?

All M27C1001-12F6 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 M27C1001-12F6 meets industry standards.

7.What is the process for return or replacement of M27C1001-12F6?

All M27C1001-12F6 units undergo pre-shipment inspection (PSI). If there is an issue with M27C1001-12F6, 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 M27C1001-12F6 part is unused and in its original packaging.

Return procedure for M27C1001-12F6:

1.Submit a request within 90 days.

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

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