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STMicroelectronics M27C1001-45XF1
- Part No.:
- M27C1001-45XF1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C1001-45XF1.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 32CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,351
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Product details
Overview
M27C1001-45XF1 from STMicroelectronics is a 1 Mbit (131,072 × 8) UV-erasable EPROM in FDIP32W ceramic window package, operating at 5V ±10%, with 45 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 M27C1001-45XF1 datasheet, M27C1001-45XF1 pinout, M27C1001-45XF1 application, or M27C1001-45XF1 equivalent, key selection criteria include UV-erase capability, TTL-compatible timing, 32-pin DIP window package compatibility with legacy programmers, and guaranteed 15 W·s/cm² UV erasure dose specification.
Technical Context
The M27C1001-45XF1 implements a standard EPROM architecture with address decoding across A0–A16 (17-bit), 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 read mode requires simultaneous VCC = 5V ±10% and VPP = VCC, while programming mandates VCC = 6.25V ±0.25V and VPP = 12.75V ±0.25V.
Electronic signature mode activates via 11.5–12.5 V applied to A9 with VCC = VPP = 5V, enabling manufacturer code (20h) and device code (05h) readout on Q7–Q0 by toggling A0. Erasure requires UV exposure at 2537 Å wavelength with minimum 15 W·s/cm² integrated dose (≈15–20 min at 12,000 µW/cm²).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 words × 8 bits); supports full 16-bit microprocessor data bus interfacing without splitting. |
| Access Time | 45 ns (tAVQV); guarantees valid data within 45 ns after address and E/G stabilization for 5 MHz system timing. |
| Supply Voltage | 5V ±10% in read mode; enables direct interface with legacy 5V TTL/CMOS logic without level shifting. |
| Active Current | 30 mA at 5 MHz; defines maximum dynamic power draw during sustained read operations. |
| Standby Current | 100 µA (CMOS E high); reduces idle power by 300× versus active mode for battery-backed or low-power systems. |
| Programming Voltage | 12.75V ±0.25V on VPP; requires dedicated high-voltage supply rail, not derived from VCC. |
| UV Erase Dose | ≥15 W·s/cm² at 2537 Å; specifies minimum UV energy required for full bit reset to '1' state. |
Pinout & Package
FDIP32W: 32-pin ceramic dual-in-line package with UV-transparent quartz window (5.72 mm height, 41.9 mm length, 15.2 mm width), frit-sealed for hermetic reliability and long-term data retention (>10 years).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus accepting TTL-level inputs; fully decoded to select one of 131,072 memory locations. |
| Q0–Q7 | Data Outputs | Bi-directional TTL-compatible data bus; outputs driven during read/verify, high-Z during standby/program inhibit. |
| E | Chip Enable | Primary device-select signal; CMOS/TTL-compatible active-low input controlling power state and output enable. |
| G | Output Enable | Secondary output gate; active-low TTL input enabling data bus drive independent of E status. |
| P | Program Control | Active-low TTL input initiating programming cycle when pulsed with VPP = 12.75V and E = low. |
| VPP | Programming Supply | High-voltage input (12.75V ±0.25V); must be applied simultaneously with or after VCC and removed before or with VCC. |
| VCC | Supply Voltage | 5V ±10% (read), 6.25V ±0.25V (program); decoupling requires 0.1 µF ceramic + 4.7 µF bulk per 8 devices. |
| VSS | Ground | Reference return for all signals; must be low-inductance connection to minimize ground bounce during switching. |
| NC | No Connect | Pin 17 (LCCC32W) and Pin 17 (TSOP32) are internally unconnected; must remain floating or grounded per layout rules. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-line output control (E + G) | Enables zero-bus-contention memory arrays: E selects device into low-power standby (100 µA), G gates output only when data is needed. |
| Electronic signature (20h/05h) | Allows automatic device identification by programmers via A9 = 12V and A0 toggle; eliminates manual part selection errors. |
| UV-erasable window package (FDIP32W) | Enables field reprogramming via 2537 Å UV lamp; quartz window permits >100 erase/write cycles with verified data retention. |
| Guaranteed 45 ns access at 5V | Meets timing requirements for 5 MHz Z80, 8086, and 68000-based systems without wait states or clock stretching. |
| 100 µs/word programming | Supports PRESTO II algorithm for full-array programming in ~13 seconds with margin-verified cell programming. |
Applications
| Industrial PLC Firmware Storage | Automotive Engine Control Unit Boot Code |
|---|---|
|
Use Scenario: Storing immutable boot firmware in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Non-volatile program memory providing deterministic 45 ns instruction fetch timing for real-time scan-cycle execution. Use Value: UV-erasable capability allows field updates using standard EPROM programmers; FDIP32W package withstands thermal cycling and vibration. |
Use Scenario: Holding calibration-critical engine management code in automotive ECUs where data integrity must survive 125°C under-hood operation. IC Role / Device Role / Timing Role: Primary boot ROM accessed during cold start; timing-critical read path ensures <50 ns instruction latency for fuel injection timing. Use Value: Guaranteed –40°C to 125°C operating range and 100 µA standby current reduce system power budget during ignition-off periods. |
| Military Communications Radio BIOS | Legacy Medical Imaging System Boot ROM |
|
Use Scenario: Secure boot image storage in tactical radios requiring tamper-resistant, non-volatile memory with long-term data retention (>20 years). IC Role / Device Role / Timing Role: Read-only memory mapped at CPU reset vector; electronic signature (20h/05h) validates authenticity before execution. Use Value: Ceramic FDIP32W package provides hermetic sealing against humidity and radiation-induced bit flips in field-deployed units. |
Use Scenario: Maintaining FDA-cleared diagnostic firmware in CT scanner control subsystems where replacement parts must match original qualification. IC Role / Device Role / Timing Role: Fixed-function program store executing initialization routines prior to FPGA configuration; 45 ns access prevents pipeline stalls. Use Value: Direct pin-to-pin compatibility with legacy M27C1001-35XF1/-60XF1 enables drop-in replacement without board redesign or timing analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C1001-45DC | 45 ns access, 5V ±10%, same 1 Mbit ×8 organization but in PDIP32 (no UV window); no erasure capability. | OTP-only use case; suitable where firmware is finalized and field updates are unnecessary. | Select when cost sensitivity outweighs reprogrammability; avoids UV handling and lamp infrastructure. |
| AT27C1001-45JC | 45 ns access, 5V ±10%, PLCC32 package; identical timing and programming specs but leaded plastic carrier. | Surface-mount assembly preferred; requires reflow profile compatible with 260°C peak temperature. | Select for automated PCB assembly; verify socket compatibility if used in field-serviceable modules. |
Compared with AM27C1001-45DC and AT27C1001-45JC, the M27C1001-45XF1 uniquely supports UV erasure via its ceramic window, enabling unlimited field firmware revisions without component replacement-critical for prototyping, certification testing, and long-lifecycle industrial deployments.
Availability
M27C1001-45XF1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot code, military radio BIOS, and legacy medical imaging system boot ROM requiring stable component supply and long-term obsolescence support.
Supply support for M27C1001-45XF1 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 over 40 years of memory product heritage.
The M27C1001 belongs to ST's legacy EPROM product line designed specifically for high-reliability, long-lifecycle embedded systems requiring field-upgradable firmware in harsh environments.
FAQ
What UV wavelength and exposure time are required to fully erase the M27C1001-45XF1?
The M27C1001-45XF1 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, full erasure is achieved in 15–20 minutes at 2.5 cm distance. Fluorescent lighting or sunlight may cause partial erasure over months or weeks and must be blocked with opaque labels.
Can the M27C1001-45XF1 be programmed in-system, or does it require a dedicated EPROM programmer?
The M27C1001-45XF1 requires a dedicated EPROM programmer capable of delivering 12.75V ±0.25V to VPP, 6.25V ±0.25V to VCC, and generating precise 100 µs programming pulses on P while holding E low. In-system programming is not supported due to high-voltage and timing constraints; socket-based programming is mandatory.
How does the dual-line control (E and G) reduce power consumption in multi-chip memory systems?
When E is high (CMOS level), the M27C1001-45XF1 enters standby mode drawing only 100 µA, regardless of G state. G independently gates output drivers, allowing multiple devices to share a common data bus while only one is actively driving. This eliminates bus contention and cuts total array power by >95% versus single-enable architectures.
Is the FDIP32W package RoHS-compliant, and what is its moisture sensitivity level (MSL)?
The FDIP32W package is exempt from RoHS lead restrictions under Annex III (hermetically sealed ceramic packages). It has no moisture sensitivity level (MSL) rating because the ceramic frit seal prevents moisture ingress; baking before soldering is not required, unlike plastic packages.
M27C1001-45XF1 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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 45 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
M27C1001-45XF1 FAQ
1.How can I place an order for M27C1001-45XF1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C1001-45XF1 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 M27C1001-45XF1 reliable?
The price and inventory of M27C1001-45XF1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C1001-45XF1 is usually 5 days.
3.What payment methods are accepted for M27C1001-45XF1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C1001-45XF1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C1001-45XF1?
M27C1001-45XF1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C1001-45XF1 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 M27C1001-45XF1?
For technical support, including M27C1001-45XF1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C1001-45XF1 requirements.
6.How does Aetrix verify that M27C1001-45XF1 is sourced from the original manufacturer or authorized distributors?
All M27C1001-45XF1 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 M27C1001-45XF1 meets industry standards.
7.What is the process for return or replacement of M27C1001-45XF1?
All M27C1001-45XF1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C1001-45XF1, 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 M27C1001-45XF1 part is unused and in its original packaging.
Return procedure for M27C1001-45XF1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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