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

STMicroelectronics M27C1001-10B1

Name: M27C1001-10B1
Brand: STMicroelectronics
SKU: M27C1001-10B1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M27C1001-10B1

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 32-DIP (0.600", 15.24mm)

Datasheet:: M27C1001-10B1.pdf

Description:: IC EPROM 1MBIT PARALLEL 32DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,727

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Product details

Overview

M27C1001-10B1 from STMicroelectronics is a 1 Mbit (128K × 8) UV-erasable EPROM in a 32-pin PDIP package, operating at 5V ±10%, with 100 ns access time, 30 mA active current, and 100 µA standby current. It features dual-line control (E/G), electronic signature (20h/05h), and supports programming at 12.75 V with 100 µs/word pulse width for embedded microprocessor program storage.

For engineers reviewing the M27C1001-10B1 datasheet, M27C1001-10B1 pinout, M27C1001-10B1 application, or M27C1001-10B1 equivalent, key selection criteria include UV-erase capability, TTL-compatible timing, 32-pin DIP footprint compatibility, and verified electronic signature for automated programmer recognition.

Technical Context

The M27C1001-10B1 implements a standard EPROM architecture with address decoding across A0–A16 (131,072 locations), parallel 8-bit data I/O on Q0–Q7, and two independent enable controls: Chip Enable (E) for power gating and Output Enable (G) for output bus control. Its two-line control scheme enables low-power memory arrays and prevents bus contention.

Programming requires VPP = 12.75 V ± 0.25 V, VCC = 6.25 V ± 0.25 V, and a 100 µs pulse on P while E = VIL; verification occurs with VPP = 12.75 V and VCC = 6.25 V, P = VIH. Electronic signature mode activates via 11.5–12.5 V on A9 with VPP = VCC = 5 V to read manufacturer (20h) and device (05h) codes on Q7–Q0.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (128K × 8): supports full 16-bit microprocessor instruction fetch without banking.
Access Time	100 ns: meets timing requirements for 10 MHz Z80, 8086, and 68000-based systems in read mode.
Supply Voltage	5 V ±10%: compatible with legacy TTL/CMOS logic rails without regulation overhead.
Active Current	30 mA at 5 MHz: enables stable operation in multi-chip memory banks with standard decoupling (0.1 µF ceramic + 4.7 µF bulk).
Standby Current	100 µA: reduces system quiescent power by >99% when deselected via E = VIH.
Programming Voltage	12.75 V ±0.25 V: requires dedicated VPP supply; prevents accidental programming under 5 V-only conditions.
Electronic Signature	Manufacturer Code 20h / Device Code 05h: enables automatic algorithm selection in universal programmers (e.g., Data I/O PS-200).

Pinout & Package

Package: PDIP32 (32-pin plastic dual in-line, 600 mil width, RoHS-compliant per ST documentation). Pinout validated per Figure 2A and Table 1 of STMicroelectronics datasheet M27C1001 Rev 17 (June 2002).

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit address bus interface; selects one of 131,072 bytes; TTL-compatible thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V).
Q0–Q7	Data Outputs	8-bit bidirectional data bus during programming/verify; outputs high-impedance when E or G inactive.
E	Chip Enable	Primary power control: asserts active current only when low; places device in 100 µA standby when high.
G	Output Enable	Secondary output gate: enables Q0–Q7 drivers only when low; prevents bus contention in multi-device arrays.
P	Program Control	Active-low programming trigger; sampled only when E = VIL and VPP = 12.75 V; initiates 100 µs write pulse.
VPP	Programming Supply	Dedicated 12.75 V input; isolated from VCC; must be applied simultaneously with or after VCC to prevent latch-up.
VCC	Supply Voltage	5 V ±10% main supply; powers logic and outputs; must be stable before VPP during programming.
VSS	Ground	Common reference for all signals; requires low-inductance connection adjacent to 0.1 µF decoupling capacitor.
NC	No Connect	Pin 17 (per Figure 2A); internally unconnected; must remain floating or tied to VSS per layout guidelines.

Key Features

Feature	Design Value
UV Erasability	Full array erasure in 15–20 min using 2537 Å UV lamp (≥15 W·s/cm² dose); enables firmware revision cycles in lab/production environments.
Two-Line Output Control	Independent E (chip select) and G (output enable) pins allow hierarchical memory mapping and eliminate bus contention in 32-bit or wider data paths.
Electronic Signature	Read-only 2-byte ID (20h/05h) via A9 high-voltage mode; ensures correct algorithm loading in automated programming stations without manual part selection.
PRESTO II Programming	Guaranteed margin programming with auto-verify loop; eliminates over-programming risk and extends cell endurance beyond 100 write/erase cycles.
Wide Temperature Range	Rated for –40 °C to 125 °C operation (industrial grade); supports deployment in engine control units, industrial PLCs, and telecom line cards.

Applications

Industrial Control Firmware Storage

Legacy Microprocessor Development System

Use Scenario: Storing boot code and real-time control algorithms in programmable logic controllers (PLCs) with field-upgradable firmware.

IC Role / Device Role / Timing Role: Non-volatile program memory mapped to CPU address space; accessed via synchronous 100 ns read cycle with E/G-controlled bus arbitration.

Use Value: UV erasability allows reprogramming after hardware revisions; 100 µA standby current minimizes power draw during idle watchdog cycles.

Use Scenario: Emulating ROM in Z80 or 8086 development boards where firmware changes occur frequently during debug.

IC Role / Device Role / Timing Role: Primary instruction memory with direct CPU bus interface; supports single-cycle reads at ≤10 MHz clock rates.

Use Value: PDIP32 package enables socket-based replacement; electronic signature ensures correct programming algorithm selection across multiple board variants.

Automotive Engine Control Unit (ECU)

Military Communications Equipment

Use Scenario: Holding calibration tables and diagnostic routines in automotive ECUs requiring long-term data retention and environmental robustness.

IC Role / Device Role / Timing Role: Read-only configuration store accessed during cold start; operates across –40 °C to 125 °C ambient range.

Use Value: 125 °C rating matches under-hood thermal profiles; 15 W·s/cm² UV erase specification ensures reliable field updates at depot maintenance facilities.

Use Scenario: Securing cryptographic boot loaders in tactical radios where firmware integrity must survive extended storage and shock/vibration.

IC Role / Device Role / Timing Role: Tamper-resistant program storage with no volatile backup; erased only via controlled UV exposure in secure facilities.

Use Value: Ceramic window package (FDIP32W variant) provides physical evidence of erasure; electronic signature prevents unauthorized firmware substitution.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AM27C1001-10DC	Same 1 Mbit ×8 organization, 100 ns access, but uses AMD's proprietary programming algorithm and signature codes (01h/15h).	Requires AMD-specific programmer firmware; not recognized by ST-optimized tools like ST FlashRunner.	Select only if existing toolchain is AMD-locked; verify voltage tolerances (VPP = 12.5 V ±0.5 V) match system design.
AT27C1024-10PU	1 Mbit ×8, 100 ns, but features faster 50 µs programming time and lower 5 V-only VPP (no 12.75 V rail required).	Eliminates need for dedicated high-voltage supply; incompatible with UV erasure - OTP-only variant available.	Prefer for new designs avoiding UV handling; not suitable for applications requiring field erasure or legacy UV-erasable infrastructure.

Compared with AM27C1001-10DC, M27C1001-10B1 offers guaranteed ST-programmer compatibility and documented UV endurance; versus AT27C1024-10PU, it retains field-erasable flexibility at the cost of higher system voltage complexity.

Availability

M27C1001-10B1 is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy microprocessor development systems, automotive ECU calibration, and military communications equipment requiring stable component supply and long-lifecycle support.

Supply support for M27C1001-10B1 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The M27C1001 belongs to ST's legacy EPROM product line, engineered specifically for high-reliability, field-upgradable firmware storage in microprocessor-based systems where UV erasure and electronic signature verification are critical.

FAQ

What is the minimum UV exposure dose required to fully erase the M27C1001-10B1?

The datasheet specifies a minimum integrated UV dose of 15 W·s/cm² at 2537 Å wavelength. Using a standard 12,000 µW/cm² lamp, this equates to 15–20 minutes of exposure at ≤2.5 cm distance. Under ambient fluorescent lighting, unintentional erasure may occur over ~3 years; opaque window labels are recommended for long-term storage.

Can the M27C1001-10B1 be programmed using a 5 V-only system?

No. Programming requires VPP = 12.75 V ±0.25 V applied concurrently with VCC = 6.25 V ±0.25 V. The device will not enter programming mode with VPP = 5 V, and applying 12.75 V only to VPP without proper VCC sequencing risks damage. A dedicated high-voltage generator is mandatory.

How does the electronic signature mode function, and what equipment is needed?

Electronic signature mode activates when 11.5–12.5 V is applied to A9 while VPP = VCC = 5 V. Toggling A0 reads Manufacturer Code (20h) at A0 = VIL and Device Code (05h) at A0 = VIH on Q7–Q0. This requires a programmer capable of precise A9 overvoltage control and TTL-level signal sampling.

Is the PDIP32 package of M27C1001-10B1 RoHS-compliant?

Yes. Per STMicroelectronics' product change notification PCN-2004-012, all PDIP-packaged M27C1001 variants manufactured after Q2 2004 comply with RoHS Directive 2002/95/EC. Aetrix Electronics supplies only post-PCN compliant lots with full material declarations available upon request.

M27C1001-10B1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 32-DIP (0.600", 15.24mm)

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:: 100 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 32-PDIP

M27C1001-10B1 FAQ

1.How can I place an order for M27C1001-10B1 through Aetrix?

Please submit a Request for Quotation (RFQ) for M27C1001-10B1 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 M27C1001-10B1 reliable?

The price and inventory of M27C1001-10B1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C1001-10B1 is usually 5 days.

3.What payment methods are accepted for M27C1001-10B1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C1001-10B1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M27C1001-10B1?

M27C1001-10B1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M27C1001-10B1 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 M27C1001-10B1?

For technical support, including M27C1001-10B1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C1001-10B1 requirements.

6.How does Aetrix verify that M27C1001-10B1 is sourced from the original manufacturer or authorized distributors?

All M27C1001-10B1 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 M27C1001-10B1 meets industry standards.

7.What is the process for return or replacement of M27C1001-10B1?

All M27C1001-10B1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C1001-10B1, 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 M27C1001-10B1 part is unused and in its original packaging.

Return procedure for M27C1001-10B1:

1.Submit a request within 90 days.

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

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