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STMicroelectronics M27C2001-70XF1
- Part No.:
- M27C2001-70XF1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C2001-70XF1.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,877
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Product details
Overview
M27C2001-70XF1 from STMicroelectronics is a 2 Mbit (256K × 8) UV-erasable EPROM in FDIP32W ceramic window package, featuring 55 ns access time, 5 V ±10% read supply, and 12.75 V ±0.25 V programming voltage. It supports TTL-level addressing and data I/O, operates across –40°C to +85°C, and is used in legacy microprocessor boot memory, industrial firmware storage, and embedded controller program retention where field erasure via UV light is required.
For engineers reviewing the M27C2001-70XF1 datasheet, M27C2001-70XF1 pinout, M27C2001-70XF1 application, or M27C2001-70XF1 equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options for legacy system maintenance and replacement design.
Technical Context
The M27C2001-70XF1 implements a parallel-addressed, byte-wide EPROM architecture with dual-line output control (E and G), enabling low-power standby (100 µA) and bus contention avoidance in multi-chip memory arrays. Its logic diagram confirms full address decoding of A0–A17 and bidirectional Q0–Q7 data paths under E/G gating.
Programming uses the PRESTO II algorithm with 100 µs/word pulses at VCC = 6.25 V and VPP = 12.75 V; verification occurs in margin mode at two VCC levels (6 V and 4.2 V) to ensure cell threshold stability. Electronic signature (20h manufacturer code, 61h device code) is accessed via 12 V on A9 and toggling A0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Mbit (262,144 × 8 bits); supports full 18-bit address space for boot ROM or firmware image storage. |
| Access Time | 55 ns max (tAVQV); enables direct interface with 12–18 MHz microprocessors without wait states. |
| Read Supply | 5 V ±10%; compatible with standard TTL/CMOS logic rails and legacy 5 V system power domains. |
| Programming Voltage | 12.75 V ±0.25 V on VPP; requires dedicated high-voltage programming circuitry, not supplied by host system. |
| Standby Current | 100 µA (CMOS E high); reduces idle power in battery-backed or energy-sensitive embedded systems. |
| Operating Temp | –40°C to +85°C; qualified for industrial control panels, telecom line cards, and automotive body modules. |
| UV Erase Dose | ≥15 W·s/cm² at 2537 Å; achieves full bit reset in 15–20 min using standard EPROM erasers. |
Pinout & Package
FDIP32W: 32-pin ceramic dual in-line package with UV-transparent quartz window; frit-sealed for hermetic reliability and long-term data retention (>10 years).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit parallel address bus; fully decoded to select one of 262,144 bytes; TTL-compatible thresholds. |
| Q0–Q7 | Data Outputs | Bi-directional 8-bit data bus; outputs valid only when E and G are low; 2.4 V VOH drives standard TTL loads. |
| E | Chip Enable | Primary device selection signal; CMOS high (VIH > VCC – 0.2 V) places device in 100 µA standby with Hi-Z outputs. |
| G | Output Enable | Secondary output gate; independent of E; allows shared G bus across multiple EPROMs while keeping deselected devices in standby. |
| P | Program Control | Active-low pulse input during programming; must be synchronized with VPP = 12.75 V and E = low to initiate 100 µs write cycle. |
| VPP | Programming Supply | Dedicated 12.75 V ±0.25 V input; isolated from VCC; enables Fowler-Nordheim tunneling for oxide charge injection. |
| VCC | Supply Voltage | 5 V ±10% for read; 6.25 V ±0.25 V for programming; decoupling requires 0.1 µF ceramic + 4.7 µF bulk per 8 devices. |
| VSS | Ground | Signal reference plane; must be low-inductance connection to minimize ground bounce during output switching. |
Key Features
| Feature | Design Value |
|---|---|
| Two-Line Output Control (E + G) | Enables hierarchical memory array management: E selects device, G gates output-eliminates bus contention and cuts active current by >99% in idle chips. |
| PRESTO II Programming Algorithm | Guarantees margin-safe programming via dual-voltage verify (6 V / 4.2 V); no over-programming pulses required; typical full-array write time: 26.5 s. |
| Electronic Signature (20h/61h) | Automatically identifies STMicroelectronics origin and device type via A9 high-voltage activation; essential for universal programmer compatibility and BOM traceability. |
| ECOPACK® Compliance | Lead-free ceramic package (FDIP32W); JEDEC JESD97 second-level interconnect marking; meets RoHS and ELV requirements for industrial deployment. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O configuration in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Non-volatile boot memory mapped to CPU reset vector; provides deterministic startup within 55 ns after power-on reset assertion. Use Value: UV-erasability allows field firmware updates using portable erasers; ceramic package withstands 85°C cabinet ambient and vibration. |
Use Scenario: Holding immutable startup code for 8051- and Z80-based embedded controllers in medical diagnostic equipment. IC Role / Device Role / Timing Role: Primary instruction store executing from address 0x0000; supports zero-wait-state operation at 12 MHz CPU clock. Use Value: 100 µA standby current extends battery backup runtime; electronic signature ensures correct algorithm selection in automated test fixtures. |
| Telecom Line Card Configuration | Avionics Maintenance Data Module |
|
Use Scenario: Retaining hardware-specific calibration tables and protocol stack parameters in T1/E1 line interface units. IC Role / Device Role / Timing Role: Static configuration memory accessed during card initialization; read-only during normal operation. Use Value: FDIP32W hermetic seal prevents moisture ingress in humid central office environments; ECOPACK compliance satisfies telecom environmental directives. |
Use Scenario: Storing aircraft-specific fault history logs and sensor calibration offsets in portable maintenance terminals. IC Role / Device Role / Timing Role: Read-once, erase-and-reprogram memory for mission-critical data archival; erased only during depot-level servicing. Use Value: UV window enables controlled erasure in certified labs; 15–20 min erase cycle aligns with scheduled maintenance windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C2001-70DC | Same 2 Mbit × 8 organization, 55 ns access, but in PDIP32 plastic package (no UV window); requires OTP programming only. | Used where firmware is never updated in field-e.g., consumer appliance mainboards-eliminating need for UV eraser infrastructure. | Select when cost sensitivity outweighs field reprogrammability; verify PCB footprint compatibility (PDIP vs FDIP lead pitch and body height). |
| AT27C2001-70PU | Pin-compatible 2 Mbit EPROM from Microchip; 55 ns access, same 5 V/12.75 V voltage scheme, but rated –40°C to +125°C. | Suitable for extended-temperature deployments like engine control units where ST's +85°C limit is insufficient. | Choose for higher ambient tolerance; confirm electronic signature codes (Microchip uses different ID bytes) in programming tool configuration. |
Compared with AM27C2001-70DC and AT27C2001-70PU, the M27C2001-70XF1 uniquely supports field-erasable UV programming in a hermetically sealed ceramic package-critical for aerospace, industrial, and telecom applications requiring long-term data integrity and controlled reprogramming cycles.
Availability
M27C2001-70XF1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot ROM, and telecom line card configuration requiring stable component supply and long-lifecycle support.
Supply support for M27C2001-70XF1 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, MCU, power, and memory products for industrial, automotive, and consumer markets.
The M27C2001 belongs to ST's legacy EPROM product line, engineered specifically for reliable, field-erasable non-volatile storage in microprocessor-based systems where firmware update flexibility and long-term data retention are mandatory.
FAQ
What UV wavelength and exposure time are required to fully erase the M27C2001-70XF1?
The M27C2001-70XF1 requires short-wave ultraviolet light at 2537 Å with a minimum integrated dose of 15 W·s/cm². Using a standard 12,000 µW/cm² lamp, full erasure is achieved in 15–20 minutes at a 2.5 cm distance. The FDIP32W window transmits this wavelength efficiently, and opaque labels must be applied if exposed to ambient fluorescent lighting for >3 years.
Can the M27C2001-70XF1 be operated at 3.3 V?
No. The M27C2001-70XF1 is specified only for 5 V ±10% read operation and 6.25 V ±0.25 V programming. Its input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V) and output drive (VOH = 2.4 V) are TTL-optimized. Operation below 4.5 V violates DC characteristics and risks read failures or incomplete programming.
Is the FDIP32W package RoHS-compliant?
Yes. The FDIP32W package is ECOPACK®-certified and lead-free, meeting RoHS Directive 2011/65/EU and JEDEC JESD97 marking requirements. The "ECOPACK" label appears on the inner box and package body, confirming compliance with environmental standards for industrial and telecom applications.
How does the two-line output control (E and G) reduce system power consumption?
When E is high (CMOS level), the M27C2001-70XF1 enters standby mode drawing only 100 µA-reducing active current by 99.7% versus 30 mA in read mode. G remains independent, allowing shared read strobes across memory banks while keeping deselected chips fully powered down, minimizing total array quiescent draw.
M27C2001-70XF1 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:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-CDIP Frit Seal with Window
M27C2001-70XF1 FAQ
1.How can I place an order for M27C2001-70XF1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C2001-70XF1 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 M27C2001-70XF1 reliable?
The price and inventory of M27C2001-70XF1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C2001-70XF1 is usually 5 days.
3.What payment methods are accepted for M27C2001-70XF1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C2001-70XF1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C2001-70XF1?
M27C2001-70XF1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C2001-70XF1 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 M27C2001-70XF1?
For technical support, including M27C2001-70XF1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C2001-70XF1 requirements.
6.How does Aetrix verify that M27C2001-70XF1 is sourced from the original manufacturer or authorized distributors?
All M27C2001-70XF1 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 M27C2001-70XF1 meets industry standards.
7.What is the process for return or replacement of M27C2001-70XF1?
All M27C2001-70XF1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C2001-70XF1, 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 M27C2001-70XF1 part is unused and in its original packaging.
Return procedure for M27C2001-70XF1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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