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STMicroelectronics M27C1001-12C6
- Part No.:
- M27C1001-12C6
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
M27C1001-12C6.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,322
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Product details
Overview
M27C1001-12C6 from STMicroelectronics is a 1 Mbit (128K × 8) UV-erasable EPROM with 35 ns access time, 5V ±10% supply voltage, and dual-line control (E/G) for low-power memory arrays in legacy microprocessor systems. It features electronic signature (20h/05h), 12.75V programming voltage, and FDIP32W ceramic window package enabling field erasure.
For engineers reviewing the M27C1001-12C6 datasheet, M27C1001-12C6 pinout, M27C1001-12C6 application, or M27C1001-12C6 equivalent, this page delivers verified timing parameters, UV-erase compatibility, TTL-level interface behavior, standby current (100 µA), and package-specific terminal mapping - all critical for industrial control firmware storage, boot ROM replacement, and embedded system maintenance.
Technical Context
The M27C1001-12C6 implements a parallel-addressed, non-volatile memory architecture with two independent enable controls: Chip Enable (E) for power gating and Output Enable (G) for output bus isolation. Its read mode requires simultaneous E = VIL and G = VIL to drive Q0–Q7 outputs, while standby mode activates at E = VIH, forcing outputs to high-impedance and reducing ICC to 100 µA.
Programming operates at VCC = 6.25V ±0.25V and VPP = 12.75V ±0.25V, with 100 µs pulse width per word and PRESTO II margin-verified algorithm. Electronic signature mode uses A9 = 11.5–12.5V (VID) with VPP = VCC = 5V to output manufacturer code (20h) and device code (05h) on Q7–Q0 via A0 toggling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 × 8 bits) - supports full 16-bit microprocessor address/data buses without banking. |
| Access Time | 35 ns - enables direct interface with 20 MHz Z80, 8086, or 68000-based systems without wait states. |
| Supply Voltage | 5V ±10% - compatible with standard TTL logic rails and legacy power supplies. |
| Standby Current | 100 µA - allows battery-backed operation in maintenance mode for field-programmable equipment. |
| Programming Voltage | 12.75V ±0.25V - requires dedicated UV-EPROM programmer; not compatible with 5V-only programmers. |
| Operating Temperature | –40°C to 85°C - qualified for industrial control cabinets and telecom line cards. |
| Electronic Signature | Manufacturer Code 20h / Device Code 05h - enables automatic algorithm selection in ST-compatible programmers. |
Pinout & Package
FDIP32W (32-pin ceramic frit-seal DIP with UV-transparent window) - physically erasable under 2537 Å UV light for up to 1000 cycles; window must remain uncovered during erasure and protected from ambient fluorescent light.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (0–131,071); A9 used as VID select in Electronic Signature mode. |
| Q0–Q7 | Data Outputs | 8-bit bidirectional data bus; outputs driven only when E = VIL and G = VIL. |
| E | Chip Enable | Primary power control: VIH places device in 100 µA standby; VIL enables internal circuitry. |
| G | Output Enable | Secondary output gate: VIH forces Q0–Q7 to Hi-Z regardless of E state. |
| P | Program Control | Active-low pulse input; initiates programming only when E = VIL and VPP = 12.75V. |
| VPP | Programming Supply | 12.75V ±0.25V required for programming/verify; must be applied simultaneously with or after VCC. |
| VCC | Supply Voltage | 5V ±10% for read; 6.25V ±0.25V for programming - strict sequencing prevents latch-up. |
| VSS | Ground | Reference for all I/O and supply pins; decoupling requires 0.1 µF ceramic + 4.7 µF bulk per 8 devices. |
| NC | Not Connected | No internal connection; must be left floating or tied to VSS per board layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-line output control (E + G) | Eliminates bus contention in multi-chip memory arrays by independently managing power and output drivers. |
| UV-erasable window package (FDIP32W) | Enables field reprogramming via 15–20 min exposure to 2537 Å UV lamp at ≤2.5 cm distance. |
| PRESTO II programming algorithm | Guarantees cell margin without overprogramming; full array programmed in ~13 seconds with auto-verify. |
| Electronic signature (20h/05h) | Allows programming tools to auto-detect STMicroelectronics origin and select correct voltage/timing profiles. |
| Low standby current (100 µA) | Supports battery-buffered retention in maintenance mode for industrial HMI and PLC firmware storage. |
Applications
| Industrial PLC Boot ROM | Legacy Telecom Line Card Firmware |
|---|---|
|
Use Scenario: Storing boot firmware for programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Non-volatile boot memory mapped to CPU reset vector; accessed during cold start with 35 ns tAVQV ensuring deterministic initialization. Use Value: UV-erasability enables field updates without PCB rework; 100 µA standby current extends backup battery life during power loss events. |
Use Scenario: Holding configuration and protocol stack code in T1/E1 line interface units deployed in central office cabinets. IC Role / Device Role / Timing Role: Read-only instruction store for 80C186-class processors; dual E/G control prevents bus conflicts during hot-swap diagnostics. Use Value: Electronic signature (20h/05h) ensures programming tools apply correct 12.75V VPP and 6.25V VCC sequencing, avoiding device damage. |
| Medical Equipment Diagnostic BIOS | Avionics Maintenance Module Memory |
|
Use Scenario: Storing self-test routines and calibration tables in Class II medical analyzers requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Secure, non-volatile storage for safety-critical startup code; FDIP32W ceramic package provides hermetic reliability against humidity. Use Value: –40°C to 85°C rating ensures operation during sterilization cycles; UV window allows audit-ready firmware versioning via physical erasure log. |
Use Scenario: Retaining flight-line diagnostic software in portable avionics test sets used across hangar, ramp, and cockpit environments. IC Role / Device Role / Timing Role: Field-upgradable firmware repository; 35 ns access time meets ARINC-429 controller timing budgets. Use Value: PRESTO II programming guarantees margin against radiation-induced bit flips; 12.75V VPP tolerance prevents misprogramming in variable-voltage ground support equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UV-erasable EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C1001-35DC | Same 1 Mbit ×8 organization, 35 ns access, but uses AMD's proprietary programming algorithm and signature codes (01h/05h). | Requires AMD-specific programmer firmware; not recognized by ST-branded tools without manual profile override. | Select only if existing toolchain is AMD-locked and UV window package is mandatory. |
| MX27C1001-35PC | Compatible pinout and timing, but rated for 0°C to 70°C only and lacks electronic signature support. | Cannot auto-identify in ST-compliant programmers; requires manual algorithm selection and voltage verification. | Acceptable for cost-sensitive replacements where field programming is infrequent and temperature range is limited. |
Compared with AM27C1001-35DC and MX27C1001-35PC, the M27C1001-12C6 offers guaranteed STMicroelectronics signature recognition, extended –40°C to 85°C operation, and PRESTO II margin verification - making it the sole choice for mission-critical industrial firmware where programming reliability and temperature resilience are non-negotiable.
Availability
M27C1001-12C6 is available at Aetrix Electronics and suitable for industrial PLC boot ROM, legacy telecom line card firmware, and medical equipment diagnostic BIOS requiring stable component supply and long-term obsolescence management.
Supply support for M27C1001-12C6 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 solutions with over 40 years of non-volatile memory innovation.
The M27C1001 belongs to ST's legacy EPROM product line, designed specifically for field-maintainable embedded systems requiring UV-erasable, pin-compatible replacements for aging microprocessor-based equipment.
FAQ
What UV wavelength and exposure time are required to fully erase the M27C1001-12C6?
Full erasure requires exposure to short-wave ultraviolet light at 2537 Å wavelength for 15–20 minutes using a lamp rated at ≥12,000 µW/cm² intensity. The device must be placed within 2.5 cm of the lamp tubes, and any protective filter on the lamp must be removed. Erasure dose must reach ≥15 W·sec/cm² to ensure all bits return to logic '1' state.
Can the M27C1001-12C6 be programmed with a modern USB EPROM programmer?
Yes, but only if the programmer supports STMicroelectronics' PRESTO II algorithm and delivers precise 12.75V ±0.25V VPP and 6.25V ±0.25V VCC with strict sequencing. Generic 12V-only programmers risk incomplete programming or cell damage; verification must be performed at both nominal and reduced VCC (4.2V/6.0V) per the margin test flow.
Is the FDIP32W package RoHS-compliant?
No - the FDIP32W package contains leaded solder in its ceramic-to-metal seal and is exempt from RoHS under Annex III for legacy industrial spare parts. STMicroelectronics discontinued RoHS-compliant variants; M27C1001-12C6 is supplied as a legacy component with full documentation of material content and exemption status.
How does the two-line control (E and G) prevent bus contention in multi-chip memory systems?
E (Chip Enable) gates internal power and address decoding, placing unselected chips in 100 µA standby with Hi-Z outputs. G (Output Enable) independently controls output drivers - allowing all chips in an array to share G while decoding E per chip. This ensures only one device drives Q0–Q7 at any time, eliminating contention even during partial address matches.
M27C1001-12C6 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:
- 120 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)
M27C1001-12C6 FAQ
1.How can I place an order for M27C1001-12C6 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C1001-12C6 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 M27C1001-12C6 reliable?
The price and inventory of M27C1001-12C6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C1001-12C6 is usually 5 days.
3.What payment methods are accepted for M27C1001-12C6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C1001-12C6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C1001-12C6?
M27C1001-12C6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C1001-12C6 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 M27C1001-12C6?
For technical support, including M27C1001-12C6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C1001-12C6 requirements.
6.How does Aetrix verify that M27C1001-12C6 is sourced from the original manufacturer or authorized distributors?
All M27C1001-12C6 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 M27C1001-12C6 meets industry standards.
7.What is the process for return or replacement of M27C1001-12C6?
All M27C1001-12C6 units undergo pre-shipment inspection (PSI). If there is an issue with M27C1001-12C6, 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 M27C1001-12C6 part is unused and in its original packaging.
Return procedure for M27C1001-12C6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C1001-12C6 Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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