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STMicroelectronics M27C1001-35C6
- Part No.:
- M27C1001-35C6
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27C1001-35C6.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,608
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Product details
Overview
M27C1001-35C6 from STMicroelectronics is a 1 Mbit (128K × 8) UV-erasable EPROM with 35 ns access time, 5V ±10% supply voltage, and FDIP32W ceramic window package. It features dual-line control (E/G), electronic signature (20h/05h), and supports programming at 12.75V with 100 µs/word pulse width. Used in legacy microprocessor systems for firmware storage where field erasure via UV light is required.
For engineers reviewing the M27C1001-35C6 datasheet, M27C1001-35C6 pinout, M27C1001-35C6 application, or M27C1001-35C6 equivalent, key selection criteria include UV-erasability, 35 ns read timing under TTL-level control, FDIP32W package compatibility with UV exposure fixtures, and support for PRESTO II programming with margin verification.
Technical Context
The M27C1001-35C6 implements a two-control-line architecture: Chip Enable (E) governs power state (active/standby), while Output Enable (G) independently gates output drivers-enabling low-power array operation without bus contention. Its 131,072 × 8-bit organization maps A0–A16 address inputs to Q0–Q7 data outputs with TTL-compatible logic thresholds.
Programming requires VPP = 12.75V ±0.25V and VCC = 6.25V ±0.25V; verify mode uses same VPP but elevated VCC margins (6.0V/4.2V) to confirm cell margin. Electronic Signature mode activates via 11.5–12.5V on A9, enabling automatic algorithm matching in programmers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 × 8 bits) - fixed parallel organization for byte-wide microprocessor buses |
| Access Time | 35 ns - guaranteed maximum tAVQV delay from address valid to output valid at 5V, enabling 28.6 MHz max read rate |
| Supply Voltage | 5V ±10% - supports standard TTL/CMOS system rails without regulation overhead |
| Active Current | 30 mA at 5 MHz - defines dynamic power budget for memory subsystems in embedded controllers |
| Standby Current | 100 µA - enables low-power retention during CPU idle cycles without external power gating |
| Programming Voltage | 12.75V ±0.25V - precise VPP requirement ensures reliable Fowler-Nordheim tunneling without oxide stress |
| Electronic Signature | Manufacturer Code 20h / Device Code 05h - enables automated device identification in universal programmers |
Pinout & Package
FDIP32W (32-pin ceramic frit-seal DIP with UV-transparent window); 42.0 mm × 15.2 mm body, 2.54 mm lead pitch, 5.72 mm height; designed for UV erasure via direct lamp exposure through top window.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus interface; A9 used as VID select in 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 | Primary device-select signal; high → standby mode (100 µA), low → active power path |
| G | Output Enable | Secondary output gate; independent of E, prevents bus contention in multi-chip memory arrays |
| P | Program Control | Active-low pulse input that initiates 100 µs programming cycle when E = low and VPP = 12.75V |
| VPP | Programming Supply | Dedicated 12.75V input; isolated from VCC to prevent system rail disturbance during programming |
| VCC | Supply Voltage | 5V read supply; switched to 6.25V during programming to optimize write margin and endurance |
| VSS | Ground | Common reference for all signals; decoupling requires 0.1 µF ceramic capacitor placed adjacent to pin |
| NC | No Connect | Internally unconnected pin; must remain floating per datasheet to avoid leakage paths |
Key Features
| Feature | Design Value |
|---|---|
| UV Erasability | Full array erasure in 15–20 min using 2537 Å UV lamp at ≥15 W·sec/cm² dose - enables firmware rework without device replacement |
| PRESTO II Programming | Guaranteed margin programming with auto-verify at multiple VCC levels (6.0V/4.2V) - eliminates over-programming and extends cell lifetime |
| Two-Line Output Control | Independent E (power) and G (output) enables zero-bus-contention memory expansion - critical for 16-bit+ microprocessor designs |
| Electronic Signature | Read-only manufacturer/device ID (20h/05h) via A9 voltage override - ensures correct algorithm selection in automated programming stations |
| Wide Temperature Range | –40°C to +85°C operation (C6 suffix) - qualified for industrial control and telecom infrastructure applications |
Applications
| Industrial PLC Firmware Storage | Avionics Boot ROM |
|---|---|
|
Use Scenario: Storing immutable boot code and configuration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile program memory mapped to CPU address space; 35 ns access satisfies real-time scan-cycle timing budgets. Use Value: UV erasability allows field updates after hardware validation, avoiding costly board respins during firmware iteration. |
Use Scenario: Holding certified flight software in airborne computing modules where data integrity and long-term retention are mandated. IC Role / Device Role / Timing Role: Read-only boot ROM accessed during cold start; FDIP32W ceramic package provides hermetic reliability against thermal cycling. Use Value: Electronic signature (20h/05h) enables traceable device authentication in DO-254-compliant toolchains. |
| Medical Imaging System BIOS | Legacy Test Equipment Calibration Data |
|
Use Scenario: Storing diagnostic self-test routines and sensor calibration constants in MRI and CT scanner mainframes. IC Role / Device Role / Timing Role: Static memory holding safety-critical initialization sequences; standby current ≤100 µA reduces thermal load in sealed enclosures. Use Value: PRESTO II programming margin verification ensures bit-level reliability across 10+ year service life under gamma radiation exposure. |
Use Scenario: Archiving instrument-specific calibration coefficients in automated test equipment requiring infrequent field updates. IC Role / Device Role / Timing Role: OTP-capable EPROM used as permanent data vault; FDIP32W window allows lab-based UV erasure before recalibration cycles. Use Value: Dual-line control (E/G) isolates memory from bus noise during high-speed analog measurement acquisition phases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C1001-35DC | 35 ns access, 5V ±10%, PDIP32 package - no UV window, OTP-only; identical AC/DC specs except erasure capability | Used where firmware is final and field erasure is unnecessary; lower cost due to plastic packaging | Select when UV erasure is not required and board-level reprogramming is done only once during manufacturing. |
| MX27C1001-35PC | 35 ns access, 5V ±10%, PDIP32; compatible pinout but lacks electronic signature (no 20h/05h ID) | Suitable for cost-sensitive consumer electronics where programmer auto-detection is not needed | Choose for high-volume production where programming station compatibility is managed manually or via external database lookup. |
Compared with AM27C1001-35DC and MX27C1001-35PC, the M27C1001-35C6 uniquely supports field-erasable firmware via UV light and provides automated device identification - essential for repair depots and multi-product programming lines.
Availability
M27C1001-35C6 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, avionics boot ROM, and medical imaging system BIOS requiring stable component supply across extended product lifecycles.
Supply support for M27C1001-35C6 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 broad legacy product support.
The M27C1001 belongs to ST's mature EPROM product line, designed specifically for long-lifecycle embedded systems requiring field-upgradable non-volatile memory with proven radiation-hardened reliability.
FAQ
What UV wavelength and exposure dose are required to fully erase the M27C1001-35C6?
Full erasure requires short-wave ultraviolet light at 2537 Å wavelength with a minimum integrated dose of 15 W·sec/cm². Using a 12,000 µW/cm² lamp, erasure takes 15–20 minutes at 2.5 cm distance. Room fluorescent lighting may cause partial erasure over years; direct sunlight can erase it in ~1 week.
Can the M27C1001-35C6 be programmed in-system, or does it require a dedicated programmer?
It requires a dedicated EPROM programmer supporting PRESTO II algorithm, 12.75V VPP, and electronic signature verification. In-system programming is not supported - VPP must be externally supplied, and UV erasure necessitates device removal for lamp exposure.
Why does the M27C1001-35C6 use separate E and G control lines instead of a single CE?
The dual-line control separates power management (E) from output gating (G), allowing deselected devices to enter 100 µA standby while keeping outputs high-Z regardless of G state. This prevents bus contention in multi-chip memory banks and minimizes system-level power dissipation.
Is the FDIP32W package RoHS-compliant?
No - the FDIP32W package contains leaded solder and ceramic materials not compliant with RoHS Directive 2011/65/EU. STMicroelectronics discontinued RoHS conversion for this legacy package; alternative RoHS-compliant options are not available for this speed/package variant.
M27C1001-35C6 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:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.35x13.89)
M27C1001-35C6 FAQ
1.How can I place an order for M27C1001-35C6 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C1001-35C6 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 M27C1001-35C6 reliable?
The price and inventory of M27C1001-35C6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C1001-35C6 is usually 5 days.
3.What payment methods are accepted for M27C1001-35C6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C1001-35C6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C1001-35C6?
M27C1001-35C6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C1001-35C6 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 M27C1001-35C6?
For technical support, including M27C1001-35C6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C1001-35C6 requirements.
6.How does Aetrix verify that M27C1001-35C6 is sourced from the original manufacturer or authorized distributors?
All M27C1001-35C6 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 M27C1001-35C6 meets industry standards.
7.What is the process for return or replacement of M27C1001-35C6?
All M27C1001-35C6 units undergo pre-shipment inspection (PSI). If there is an issue with M27C1001-35C6, 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 M27C1001-35C6 part is unused and in its original packaging.
Return procedure for M27C1001-35C6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C1001-35C6 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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