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STMicroelectronics M27C1001-70C1

Name: M27C1001-70C1
Brand: STMicroelectronics
SKU: M27C1001-70C1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M27C1001-70C1

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 32-LCC (J-Lead)

Datasheet:: M27C1001-70C1.pdf

Description:: IC EPROM 1MBIT PARALLEL 32PLCC

Quantity:: RFQ Add To RFQ list

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Inventory:4,862

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Product details

Overview

M27C1001-70C1 from STMicroelectronics is a 1 Mbit (131,072 × 8) UV-erasable EPROM with 35 ns access time, 5 V ±10% supply voltage, and dual-line control (E/G) for low-power memory arrays in embedded microprocessor systems.

For engineers reviewing the M27C1001-70C1 datasheet, M27C1001-70C1 pinout, M27C1001-70C1 application, or M27C1001-70C1 equivalent, key selection criteria include UV erasability, 12.75 V programming voltage, electronic signature (20h/05h), standby current of 100 µA, and FDIP32W/LCCC32W package compatibility with UV exposure windows.

Technical Context

The M27C1001-70C1 implements TTL-compatible address/data interfaces with two independent enable controls: Chip Enable (E) for power gating and Output Enable (G) for output bus isolation. Its read mode requires both E and G low to drive Q0–Q7 outputs, enabling high-density memory arrays without bus contention.

Programming uses 12.75 V ±0.25 V on VPP with 100 µs pulse width per word at VCC = 6.25 V ±0.25 V; verify occurs under same VPP while toggling A0 to read manufacturer (20h) and device (05h) codes. Erasure requires 2537 Å UV light at ≥15 W·s/cm² for 15–20 minutes.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (131,072 words × 8 bits) - supports full 16-bit microprocessor data buses with byte-wide access
Access Time	70 ns - guaranteed maximum tAVQV delay from address valid to Q0–Q7 output valid under industrial temperature range
Supply Voltage	5 V ±10% - compatible with legacy 5 V TTL logic families without level translation
Standby Current	100 µA - enables low-power retention in battery-backed or intermittent-operation systems
Programming Voltage	12.75 V ±0.25 V - requires dedicated HV supply rail; not derived from VCC
Operating Temp	–40 °C to 125 °C - qualified for automotive engine-control and industrial motor-drive environments
Electronic Signature	Manufacturer Code 20h / Device Code 05h - enables automatic algorithm selection in universal programmers

Pinout & Package

Package: FDIP32W (32-pin ceramic frit-seal DIP with UV-transparent window) - enables field erasure via ultraviolet exposure; pin-compatible with PDIP32, PLCC32, TSOP32, and LCCC32W variants.

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit address bus supporting full 131,072-word addressing; A9 used for Electronic Signature voltage (11.5–12.5 V)
Q0–Q7	Data Outputs	Bi-directional I/O during programming (data-in); TTL-compatible outputs during read (2.4 V VOH, 0.4 V VOL)
E	Chip Enable	Primary device-select signal; CMOS-high (VIH > VCC – 0.2 V) places device in 100 µA standby mode
G	Output Enable	Secondary output gate; allows shared G-bus across multiple EPROMs while E selects individual devices
VPP	Program Supply	Dedicated 12.75 V programming rail; must be applied simultaneously with or after VCC and removed before or with VCC
VCC	Supply Voltage	5 V ±10% main supply; 6.25 V ±0.25 V required only during programming
VSS	Ground	Reference for all inputs/outputs; decoupling requires 0.1 µF ceramic capacitor placed adjacent to pin
P	Program Control	Active-low pulse input (100 µs width) that initiates programming when E = VIL and VPP = 12.75 V
NC	No Connect	Internally unconnected; no external tie required

Key Features

Feature	Design Value
UV Erasability	Full array erasure in 15–20 min using 2537 Å UV lamp at ≥15 W·s/cm² - enables firmware revision in deployed systems
Two-Line Output Control	Independent E (power) and G (output) enables zero-bus-contention memory expansion - critical for multi-chip 1 MB+ ROM banks
Electronic Signature	Read-only 2-byte ID (20h/05h) via A9 high-voltage and A0 toggle - ensures correct algorithm selection in automated programming stations
PRESTO II Algorithm	Guaranteed margin programming with auto-verify per byte - eliminates over-programming and extends cell endurance
Wide Temperature Range	–40 °C to 125 °C operation - validated for under-hood automotive ECUs and industrial PLC mainboards

Applications

Automotive Engine Control Unit (ECU)

Industrial PLC Firmware Storage

Use Scenario: Storing calibrated fuel injection maps and ignition timing tables in gasoline/diesel ECUs requiring field-updatable calibration data.

IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code and real-time lookup tables; accessed via 8051 or Motorola 68K bus interface.

Use Value: UV erasability allows recalibration after sensor drift or emissions testing; 125 °C rating ensures reliability near engine blocks.

Use Scenario: Holding ladder logic firmware and I/O configuration in modular programmable logic controllers deployed in factory automation.

IC Role / Device Role / Timing Role: Primary boot ROM mapped to CPU reset vector; read during power-on initialization and runtime instruction fetch.

Use Value: 70 ns access time meets timing budgets for 12 MHz Z80 or 8 MHz 8086 derivatives; FDIP32W package permits rework via UV erasure.

Military Communications Radio Boot ROM

Legacy Medical Imaging System BIOS

Use Scenario: Secure boot image storage in HF/VHF tactical radios where firmware integrity must survive extended field deployment without battery backup.

IC Role / Device Role / Timing Role: Read-only memory containing cryptographic keys and secure bootloader; accessed only at power-up and during firmware update cycles.

Use Value: –40 °C to 125 °C qualification and 100 µA standby current support cold-start operation in arctic environments and thermal cycling durability.

Use Scenario: Storing diagnostic self-test routines and display controller initialization sequences in CT/MRI scanner front-end subsystems.

IC Role / Device Role / Timing Role: Fixed-function BIOS ROM interfaced to Intel 80186 or NEC V30 CPU; provides hardware abstraction layer for analog-to-digital conversion modules.

Use Value: LCCC32W hermetic package prevents moisture-induced bit corruption in high-humidity radiology suites; electronic signature validates firmware authenticity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AM27C1001-70DC	Same 1 Mbit × 8 architecture, 70 ns speed, but manufactured by AMD; identical pinout and AC/DC specs except VPP tolerance (12.5 V ±0.5 V vs. 12.75 V ±0.25 V)	Approved for use in legacy AMD-based military avionics; lacks ST's PRESTO II margin programming algorithm	Select when sourcing from AMD-qualified supply chains or when existing board layout uses AMD-marked footprints
MX27C1001-70PC	Macronix variant with identical FDIP32W package and 70 ns timing, but higher max standby current (200 µA) and no electronic signature support	Suitable for cost-sensitive industrial controllers where firmware updates are infrequent and programmer compatibility is not required	Choose for price-sensitive BOMs where UV erasure suffices and automatic programming verification is unnecessary

Compared with AM27C1001-70DC and MX27C1001-70PC, the M27C1001-70C1 offers tighter VPP regulation (±0.25 V), lower standby current (100 µA), and built-in electronic signature - making it preferred for high-reliability, automated programming, and long-lifecycle embedded systems.

Availability

M27C1001-70C1 is available at Aetrix Electronics and suitable for automotive ECU calibration, industrial PLC firmware storage, and military radio boot ROM applications requiring stable component supply across extended product lifecycles.

Supply support for M27C1001-70C1 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 vertical manufacturing and quality-certified wafer fabs.

The M27C1001 belongs to ST's legacy EPROM product line designed for high-reliability, field-erasable firmware storage in mission-critical embedded systems where flash alternatives lacked maturity or endurance guarantees.

FAQ

What UV wavelength and exposure dose are required to fully erase the M27C1001-70C1?

The M27C1001-70C1 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 (3000–4000 Å) causes gradual erasure over years; direct sunlight achieves full erasure in ~1 week.

Can the M27C1001-70C1 be programmed using standard 5 V logic levels?

No. Programming requires VPP = 12.75 V ±0.25 V applied to the VPP pin, VCC = 6.25 V ±0.25 V (not 5 V), and a 100 µs low pulse on the P pin. Address and data inputs remain TTL-compatible (0–5 V), but the elevated VPP and adjusted VCC are mandatory for oxide breakdown and reliable cell programming.

How does the two-line control (E and G) prevent bus contention in multi-EPROM systems?

E (Chip Enable) gates power to the device, placing unselected chips in 100 µA standby mode with Hi-Z outputs. G (Output Enable) independently controls output drivers, allowing all EPROMs in an array to share a common G line while E lines are decoded for individual selection. This ensures only one device drives the data bus at any time, eliminating contention and reducing system noise.

Is the M27C1001-70C1 compatible with modern in-circuit programmers?

Yes, but only programmers supporting EPROM-specific protocols and 12.75 V VPP generation. Its electronic signature (20h/05h) enables automatic algorithm detection in universal programmers like Data I/O PS-3000 or BP Microsystems SuperPro 501S. Standard flash programmers lacking HV capability or signature reading will not recognize or program the device.

M27C1001-70C1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 32-LCC (J-Lead)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EPROM

Technology:: EPROM - OTP

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:: Surface Mount

Supplier Device Package:: 32-PLCC (11.35x13.89)

M27C1001-70C1 FAQ

1.How can I place an order for M27C1001-70C1 through Aetrix?

Please submit a Request for Quotation (RFQ) for M27C1001-70C1 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 M27C1001-70C1 reliable?

The price and inventory of M27C1001-70C1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C1001-70C1 is usually 5 days.

3.What payment methods are accepted for M27C1001-70C1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C1001-70C1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M27C1001-70C1?

M27C1001-70C1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M27C1001-70C1 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 M27C1001-70C1?

For technical support, including M27C1001-70C1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C1001-70C1 requirements.

6.How does Aetrix verify that M27C1001-70C1 is sourced from the original manufacturer or authorized distributors?

All M27C1001-70C1 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 M27C1001-70C1 meets industry standards.

7.What is the process for return or replacement of M27C1001-70C1?

All M27C1001-70C1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C1001-70C1, 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 M27C1001-70C1 part is unused and in its original packaging.

Return procedure for M27C1001-70C1:

1.Submit a request within 90 days.

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

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