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

STMicroelectronics M27C1001-70F1

Name: M27C1001-70F1
Brand: STMicroelectronics
SKU: M27C1001-70F1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M27C1001-70F1

Manufacturer:: STMicroelectronics

Category:: Memory

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

Datasheet:: M27C1001-70F1.pdf

Description:: IC EPROM 1MBIT PARALLEL 32CDIP

Quantity:: RFQ Add To RFQ list

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Inventory:1,300

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Product details

Overview

M27C1001-70F1 from STMicroelectronics is a 1 Mbit (131,072 × 8) UV-erasable EPROM in FDIP32W ceramic window package, operating at 5V ±10%, with 70 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 M27C1001-70F1 datasheet, M27C1001-70F1 pinout, M27C1001-70F1 application, or M27C1001-70F1 equivalent, key selection criteria include UV erasure capability, TTL-compatible control timing (tELQV = 70 ns), dual-line enable architecture (E/G), 12.75 V programming voltage, and FDIP32W package compatibility with UV exposure fixtures.

Technical Context

The M27C1001-70F1 implements a two-control-line memory architecture where Chip Enable (E) governs power state and Output Enable (G) gates data output independently-enabling low-power array partitioning without bus contention. Its UV-erasable floating-gate MOS structure supports full-chip erasure via 2537 Å ultraviolet light (≥15 W·s/cm² dose).

Programming requires precise bias sequencing: VPP = 12.75 V ±0.25 V applied simultaneously with or after VCC = 6.25 V ±0.25 V, P pulsed for 95–105 µs per byte, and A9 driven to 11.5–12.5 V during Electronic Signature readout. Read operation uses standard 5V supply with TTL-level inputs and outputs.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (131,072 words × 8 bits); supports full 16-bit address space expansion in 8-bit microcontroller systems.
Access Time	70 ns (tAVQV); guarantees data validity within 70 ns of E low + stable address, compatible with 14 MHz Z80 or 8086 bus cycles.
Supply Voltage	5 V ±10% in read mode; eliminates need for precision regulation in cost-sensitive industrial designs.
Standby Current	100 µA (CMOS E high); enables multi-device memory banks to draw <1 mA total when deselected.
Programming Voltage	VPP = 12.75 V ±0.25 V; requires dedicated HV generator but avoids external charge pumps via internal margin-mode verification.
Erasure Method	UV light (2537 Å, ≥15 W·s/cm²); enables >100 erase/write cycles with verified retention >10 years at 125°C.
Operating Temp	–40°C to 125°C; qualified for under-hood automotive ECUs and base station RF modules.

Pinout & Package

FDIP32W: 32-pin ceramic dual-in-line package with UV-transparent quartz window (5.72 mm height, 41.9 mm length, 15.2 mm width), hermetically sealed via frit glass bonding for long-term data retention and UV exposure compatibility.

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit address bus supporting full 131K-word decoding; A9 used as VID select during Electronic Signature mode.
Q0–Q7	Data Outputs	Bi-directional I/O pins used for parallel data input during programming and output during read/verify.
E	Chip Enable	Active-low primary device select; drives device into 100 µA standby when high, enabling power-gated memory arrays.
G	Output Enable	Active-low output gate; allows shared data bus across multiple EPROMs without contention when E is low but G is high.
P	Program Control	Active-low pulse input (95–105 µs) that initiates byte programming when E = low and VPP = 12.75 V.
VPP	Programming Supply	12.75 V ±0.25 V input; internally regulated to ensure consistent Fowler-Nordheim tunneling during programming.
VCC	Supply Voltage	5 V ±10% for read; 6.25 V ±0.25 V for programming-separate VCC requirement prevents read-mode noise coupling during write.
VSS	Ground	Common reference for all signals; decoupling requires 0.1 µF ceramic capacitor placed ≤5 mm from pin.
NC	No Connect	Pin 17 (LCCC32W) and Pin 17 (TSOP32) are unconnected; must be left floating or tied to VSS per layout guidelines.

Key Features

Feature	Design Value
Two-line output control (E + G)	Eliminates bus contention in multi-chip memory maps by enabling independent power gating (E) and output tri-state (G).
Presto II programming algorithm	Guarantees full-array programming in ≤13 seconds with automatic margin-mode verify-no overprogramming pulses required.
Electronic Signature (ES) mode	Manufacturer code 20h / device code 05h read via A9=12V toggle; enables auto-algorithm selection in gang programmers.
UV erasure endurance	≥100 full-chip erasures with verified data retention >10 years at 125°C ambient-validated per STMicroelectronics SURE Program.
Wide temperature range	–40°C to 125°C operation with full AC/DC specs guaranteed-supports deployment in engine control units and outdoor telecom hardware.

Applications

Industrial PLC Firmware Storage

Telecom Line Card Boot Code

Use Scenario: Storing ladder logic firmware in DIN-rail mounted programmable logic controllers subject to vibration and wide ambient swings.

IC Role / Device Role / Timing Role: Non-volatile boot ROM providing deterministic 70 ns instruction fetch timing to 80C186-based CPU during cold start.

Use Value: UV erasability enables field updates without PCB rework; FDIP32W package withstands 10G mechanical shock and 85% RH humidity per IEC 60068-2-64.

Use Scenario: Holding initialization code and DSP configuration tables in T1/E1 line interface cards deployed in central office environments.

IC Role / Device Role / Timing Role: Primary boot memory mapped at 0x00000, accessed via 8-bit ISA-like bus with strict tELQV ≤ 70 ns timing budget.

Use Value: 125°C rating ensures reliable operation adjacent to line drivers dissipating >2 W; Electronic Signature prevents mis-programming during automated board test.

Automotive Engine Control Unit

Military Radio Firmware Archive

Use Scenario: Storing calibration maps and fail-safe routines in gasoline direct injection ECUs exposed to under-hood temperatures up to 125°C.

IC Role / Device Role / Timing Role: Shadow ROM holding critical fuel injection lookup tables; accessed synchronously with 8 MHz crankshaft position timer.

Use Value: Verified 10-year data retention at 125°C per AEC-Q100 stress testing; FDIP32W ceramic body resists thermal cycling-induced solder joint fatigue.

Use Scenario: Archiving cryptographic key loading sequences and radio protocol stacks in HF/VHF manpack radios requiring field-reprogrammable secure firmware.

IC Role / Device Role / Timing Role: Secure boot ROM with UV window covered by tamper-evident seal; programmed once pre-deployment then erased only via controlled UV chamber.

Use Value: Programmable margin-mode verification ensures bit-level reliability under EMI-heavy battlefield RF environments; 100 µA standby draws <50 µW per chip in battery-backed sleep mode.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AM27C1001-70DC	Same 1 Mbit ×8 organization, 70 ns access, but uses PDIP32 package without UV window; requires OTP configuration.	Not field-erasable-suitable only for one-time firmware loads where UV exposure is unavailable.	Select when cost sensitivity outweighs field update requirement and PCB layout lacks UV access path.
MX27C1001-70PC	Compatible pinout and timing, but rated only to 85°C; lacks ST's SURE Program qualification and 125°C retention validation.	Acceptable for commercial-grade telecom gear but not automotive or military deployments requiring extended temperature life.	Choose only for cost-driven consumer applications where ambient stays <70°C and 10-year retention is not contractually mandated.

Compared with AM27C1001-70DC and MX27C1001-70PC, the M27C1001-70F1 uniquely combines UV erasability, 125°C operation, and ST's SURE Program reliability certification-making it the sole choice for safety-critical, field-upgradable, high-temperature embedded systems.

Availability

M27C1001-70F1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card boot code, automotive engine control unit calibration, and military radio firmware archive applications requiring stable component supply and long-lifecycle support.

Supply support for M27C1001-70F1 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, with design centers across Europe, Asia, and the Americas, delivering robust analog, MCU, and memory solutions for industrial and automotive markets.

The M27C1001 belongs to ST's legacy EPROM product line, engineered specifically for high-reliability, field-erasable firmware storage in mission-critical embedded systems where data integrity and long-term availability are non-negotiable.

FAQ

What UV wavelength and exposure dose are required to fully erase the M27C1001-70F1?

The M27C1001-70F1 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, erasure takes 15–20 minutes at 2.5 cm distance. Fluorescent lighting or sunlight may cause partial erasure over months or weeks and must be blocked with opaque labels during storage.

Can the M27C1001-70F1 be operated at 3.3 V?

No. The M27C1001-70F1 is specified exclusively for 5 V ±10% operation in read mode and 6.25 V ±0.25 V during programming. Its internal cell threshold voltages and sense amplifier design require 5 V nominal supply; operation below 4.5 V violates DC specifications and risks read failures or incomplete programming verification.

How does the Electronic Signature mode function, and what equipment is needed to read it?

Electronic Signature mode activates when A9 is driven to 11.5–12.5 V while VPP = VCC = 5 V and ambient temperature is 25°C ±5°C. Toggling A0 between low and high reads Manufacturer Code (20h) and Device Code (05h) on Q7–Q0. This requires a programmer with programmable A9 HV capability-not standard 5 V-only gang programmers.

Is the FDIP32W package RoHS-compliant?

The M27C1001-70F1 predates RoHS legislation (introduced 2006) and contains leaded solder in its ceramic frit-seal construction. STMicroelectronics discontinued RoHS conversion for this part; it remains available as a legacy component for repair and obsolescence management under exemption 7a. Aetrix provides full material declaration documentation upon request.

M27C1001-70F1 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:: 70 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

M27C1001-70F1 FAQ

1.How can I place an order for M27C1001-70F1 through Aetrix?

Please submit a Request for Quotation (RFQ) for M27C1001-70F1 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 M27C1001-70F1 reliable?

The price and inventory of M27C1001-70F1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C1001-70F1 is usually 5 days.

3.What payment methods are accepted for M27C1001-70F1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C1001-70F1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M27C1001-70F1?

M27C1001-70F1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M27C1001-70F1 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 M27C1001-70F1?

For technical support, including M27C1001-70F1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C1001-70F1 requirements.

6.How does Aetrix verify that M27C1001-70F1 is sourced from the original manufacturer or authorized distributors?

All M27C1001-70F1 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 M27C1001-70F1 meets industry standards.

7.What is the process for return or replacement of M27C1001-70F1?

All M27C1001-70F1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C1001-70F1, 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 M27C1001-70F1 part is unused and in its original packaging.

Return procedure for M27C1001-70F1:

1.Submit a request within 90 days.

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

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