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STMicroelectronics M27C4001-45XF1
- Part No.:
- M27C4001-45XF1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C4001-45XF1.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,880
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Product details
Overview
M27C4001-45XF1 from STMicroelectronics is a 4 Mbit (512K × 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 serves as non-volatile program storage in legacy microprocessor systems requiring field-erasable firmware, such as industrial PLCs, telecom line cards, and embedded instrumentation.
For engineers reviewing the M27C4001-45XF1 datasheet, M27C4001-45XF1 pinout, M27C4001-45XF1 application, or M27C4001-45XF1 equivalent, key selection criteria include UV erasability, TTL-compatible control timing (tELQV ≤ 45 ns), dual-line output enable (E/G), ECOPACK® lead-free compliance, and 12.75 V programming voltage support.
Technical Context
The M27C4001-45XF1 implements a parallel-addressed, byte-wide EPROM architecture with two independent chip-level controls: Chip Enable (E) for power gating and Output Enable (G) for output bus management. Its logic diagram confirms full TTL input compatibility except for A9 during Electronic Signature mode (11.5–12.5 V).
It supports four distinct operational modes-Read, Standby, Programming, and Electronic Signature-each defined by specific E/G/VPP/A9 voltage combinations per Table 2. Erasure requires UV exposure (2537 Å, ≥15 W·sec/cm²) through the FDIP32W's quartz window; OTP variants omit this feature but share identical pinout and timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 4 Mbit (524,288 × 8 bits); supports full 19-bit address space (A0–A18) |
| Access Time | 45 ns max (tAVQV/tELQV); ensures compatibility with 22 MHz bus clocks in legacy 8/16-bit systems |
| Supply Voltage | 5 V ±10% in Read mode; enables direct interface with standard TTL/CMOS logic without level shifters |
| Programming Voltage | VPP = 12.75 V ±0.25 V; requires dedicated high-voltage supply rail during write cycles |
| Standby Current | 100 µA (CMOS E-high); reduces system idle power in multi-chip memory arrays |
| Electronic Signature | Manufacturer Code 20h, Device Code 41h; enables automated programmer identification and algorithm selection |
| Package Type | FDIP32W (32-pin ceramic frit-seal DIP with UV-transparent window); enables field erasure and visual die inspection |
Pinout & Package
FDIP32W is a 32-pin ceramic dual in-line package with UV-transparent quartz window, 0.6-inch body width, and frit-seal hermetic construction compliant with ECOPACK® lead-free requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit parallel address bus; fully TTL-compatible; A9 used for Electronic Signature voltage injection (11.5–12.5 V) |
| Q0–Q7 | Data Outputs | Bi-directional data bus in programming mode; high-impedance when E or G inactive |
| E | Chip Enable | Primary device select; CMOS-high (≥VCC−0.2 V) places device in 100 µA standby; TTL-low enables read/program |
| G | Output Enable | Secondary output gate; independent of E; allows shared G-bus across memory arrays to prevent bus contention |
| VPP | Programming Supply | 12.75 V ±0.25 V input; must be applied before/with VCC during programming; disconnected in Read/Standby |
| VCC | Power Supply | 5 V ±10% in Read mode; 6.25 V ±0.25 V in Programming mode; decoupling requires 0.1 µF ceramic + 4.7 µF bulk per 8 devices |
| VSS | Ground | Reference for all I/O and supply pins; low-inductance layout critical for transient current suppression |
Key Features
| Feature | Design Value |
|---|---|
| Two-Line Output Control (E + G) | Enables zero-power deselection of unaddressed chips in multi-device memory banks while maintaining bus integrity |
| UV Erasability via FDIP32W Window | Supports >100 erase/write cycles with 15–20 min UV exposure; eliminates need for socket replacement in field updates |
| PRESTO II Programming Algorithm | Guarantees cell margin with 100 µs/word pulses and automatic verify-in-margin; achieves full array programming in ~52.5 s |
| Electronic Signature (20h/41h) | Allows programming hardware to auto-detect STMicroelectronics origin and validate algorithm match before write initiation |
| ECOPACK® Compliance | Lead-free finish and JEDEC JESD97 second-level interconnect marking; satisfies RoHS and legacy rework compatibility |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot ROM |
|---|---|
Use Scenario: Storing firmware for programmable logic controllers deployed in factory automation environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Non-volatile boot code storage; accessed during cold start via 16-bit address bus with tELQV ≤ 45 ns timing guarantee. Use Value: UV erasability enables on-site firmware revision without board removal; FDIP32W window allows verification of erasure completeness before reprogramming. | Use Scenario: Holding initialization code and protocol stacks for T1/E1 line interface cards in central office switching systems. IC Role / Device Role / Timing Role: Parallel EPROM mapped into CPU memory space; selected via decoded E signal while G tied to system READ line. Use Value: Dual-line control prevents bus contention across multiple EPROMs sharing Q0–Q7; 100 µA standby current minimizes power in idle line cards. |
| Embedded Instrumentation Calibration Data | Legacy Medical Device Bootloader |
Use Scenario: Retaining calibration coefficients and sensor linearization tables in portable oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Read-only data store accessed during self-test sequence; A0–A18 driven by microcontroller's address latch. Use Value: ECOPACK® compliance ensures solderability with lead-free reflow profiles; 5 V operation matches legacy analog front-end supply rails. | Use Scenario: Hosting secure bootloader code in FDA-cleared patient monitoring equipment where firmware immutability is required between certifications. IC Role / Device Role / Timing Role: First-execution memory mapped at reset vector; verified via Electronic Signature (20h/41h) prior to code execution. Use Value: Manufacturer/device ID validation prevents accidental programming with incompatible algorithms, ensuring regulatory traceability of boot code origin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C4001-45DC | Same 4 Mbit ×8 organization, 45 ns access, but uses PDIP32 (no UV window); requires pre-programmed delivery | OTP-only use case; no field erasure capability; lower cost for fixed-function deployments | Select when firmware is finalized and field updates are unnecessary; avoids UV handling logistics |
| MX27C4001-45PC | Pin-compatible 4 Mbit EPROM; 45 ns access; PLCC32 package; same 5 V/12.75 V voltage scheme | Surface-mount alternative; higher I/O density; requires reflow-compatible footprint and UV shielding during rework | Select for space-constrained PCBs where through-hole FDIP32W is mechanically impractical |
Compared with AM27C4001-45DC and MX27C4001-45PC, the M27C4001-45XF1 uniquely provides field-erasable functionality via its FDIP32W window-critical for prototyping, certification iterations, and maintenance of long-lifecycle industrial systems-while retaining identical timing, pinout, and programming interface.
Availability
M27C4001-45XF1 is available at Aetrix Electronics and suitable for industrial PLC firmware updates, telecom line card boot ROMs, and embedded instrumentation calibration storage requiring stable component supply across extended product lifecycles.
Supply support for M27C4001-45XF1 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 discrete solutions with broad analog and microcontroller portfolios.
The M27C4001 belongs to ST's legacy EPROM product line, designed specifically for reliable, field-upgradable firmware storage in mission-critical industrial and telecom infrastructure where long-term data retention and UV-based reprogrammability are mandatory.
FAQ
What UV wavelength and exposure dose are required to fully erase the M27C4001-45XF1?
The M27C4001-45XF1 requires short-wave ultraviolet light at 2537 Å with a minimum integrated dose of 15 W·sec/cm². Using a 12,000 µW/cm² lamp, erasure is achieved in 15–20 minutes at 2.5 cm distance. Direct sunlight causes partial erasure in ~1 week; room fluorescent lighting may erase over ~3 years-opaque labels are recommended for long-term storage.
Can the M27C4001-45XF1 be operated with VCC = 5 V during programming?
No. Programming requires VCC = 6.25 V ± 0.25 V and VPP = 12.75 V ± 0.25 V simultaneously. Applying 5 V to VCC during programming violates the DC specifications in Table 8 and risks incomplete programming or cell damage. The 6.25 V supply must be stable before VPP is applied and removed after VPP.
How does the two-line output control (E and G) prevent bus contention in multi-EPROM systems?
E controls power state (active/standby), while G gates outputs independently. In a memory array, E is decoded per device for selection, and G is shared across all devices on the READ line. This ensures only the selected EPROM drives the bus (E low + G low), while others remain in high-Z standby (E high) or high-Z disabled (G high), eliminating contention even during address transitions.
Is the M27C4001-45XF1 compatible with modern 3.3 V systems?
No. The M27C4001-45XF1 is strictly a 5 V device: inputs require TTL thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V), outputs drive 2.4 V min (TTL), and VCC must be 5 V ±10% in Read mode. Interfacing with 3.3 V logic requires level-shifting buffers on all address, data, and control lines-direct connection risks undervoltage operation and timing violations.
M27C4001-45XF1 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:
- 4Mbit
- Memory Organization:
- 512K 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
M27C4001-45XF1 FAQ
1.How can I place an order for M27C4001-45XF1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C4001-45XF1 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 M27C4001-45XF1 reliable?
The price and inventory of M27C4001-45XF1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C4001-45XF1 is usually 5 days.
3.What payment methods are accepted for M27C4001-45XF1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C4001-45XF1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C4001-45XF1?
M27C4001-45XF1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C4001-45XF1 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 M27C4001-45XF1?
For technical support, including M27C4001-45XF1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C4001-45XF1 requirements.
6.How does Aetrix verify that M27C4001-45XF1 is sourced from the original manufacturer or authorized distributors?
All M27C4001-45XF1 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 M27C4001-45XF1 meets industry standards.
7.What is the process for return or replacement of M27C4001-45XF1?
All M27C4001-45XF1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C4001-45XF1, 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 M27C4001-45XF1 part is unused and in its original packaging.
Return procedure for M27C4001-45XF1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C4001-45XF1 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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