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STMicroelectronics M27C801-120F1
- Part No.:
- M27C801-120F1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C801-120F1.pdf
- Description:
- IC EPROM 8MBIT PARALLEL 32CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,017
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Product details
Overview
M27C801-120F1 from STMicroelectronics is an 8 Mbit (1,048,576 × 8) UV-erasable EPROM in a 32-pin FDIP32W ceramic frit-seal package with transparent quartz window, featuring 55 ns access time, 5 V ±10% read supply, and 12.75 V ±0.25 V programming voltage - used for firmware storage and boot code retention in legacy industrial controllers and telecom line cards requiring field-erasable nonvolatile memory.
For engineers reviewing the M27C801-120F1 datasheet, M27C801-120F1 pinout, M27C801-120F1 application, or M27C801-120F1 equivalent, this page delivers verified electrical specs, dual-line output control logic, UV erasure requirements, electronic signature codes (20h/42h), and ECOPACK® lead-free packaging compliance per JEDEC JESD97.
Technical Context
The M27C801-120F1 implements TTL-compatible address/data interface with two independent control lines: Chip Enable (E) for power gating and Output Enable (G) for output bus arbitration - enabling low-power standby (100 µA) and eliminating bus contention in multi-chip memory arrays. Its Presto IIB programming algorithm applies 50 µs pulses per word with margin-mode verify at 6.25 V VCC to ensure reliable cell threshold margin without overprogramming.
Electronic signature mode activates via 11.5–12.5 V on A9, outputting manufacturer code 20h and device code 42h on Q7–Q0; UV erasure requires ≥30 W·sec/cm² at 2537 Å wavelength (30–40 min exposure at ≤2.5 cm distance), with susceptibility to ambient fluorescent light over years and direct sunlight within days.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 8 Mbit (1,048,576 × 8 organization) - supports full 20-bit address space for boot ROM applications |
| Access time | 55 ns (tAVQV, tELQV) - meets timing budgets for 12 MHz Z80/8086-based systems |
| Read supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails without regulation |
| Programming voltage | 12.75 V ±0.25 V on GVPP - requires dedicated high-voltage supply, not derived from VCC |
| Standby current | 100 µA (CMOS E input) - enables ultra-low quiescent power in dormant system states |
| Electronic signature | Manufacturer code 20h, Device code 42h - enables automated programmer identification and algorithm selection |
| UV erasure dose | ≥30 W·sec/cm² at 2537 Å - defines minimum lamp intensity × exposure time for full bit reset |
Pinout & Package
Package: FDIP32W (32-pin ceramic frit-seal DIP with UV-transparent window, 0.600" width, JEDEC MS-015).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address inputs | 20-bit parallel address bus; A9 carries 11.5–12.5 V for electronic signature activation |
| Q0–Q7 | Data outputs | 8-bit bidirectional data bus - outputs valid only when E = VIL and G = VIL; latched during programming |
| E | Chip Enable | Active-low primary enable; VIH > VCC – 0.2 V places device in 100 µA standby; pulsed low enables programming |
| G (GVPP) | Output Enable / Program Supply | Active-low output gate in read mode; supplies 12.75 V during programming - dual-function pin requiring external HV switching |
| VCC | Supply voltage | 5 V ±10% for read; 6.25 V ±0.25 V required during programming - must be applied before/with VPP |
| VSS | Ground | Reference return for all signals; decoupling requires 0.1 µF ceramic capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + G) | Enables independent power gating and output bus arbitration - eliminates contention in multi-device memory banks |
| Presto IIB programming | Guarantees cell threshold margin via margin-mode verify after each 50 µs pulse - no overprogramming needed |
| Electronic signature (20h/42h) | Allows automatic device recognition by programmers - prevents mismatched algorithms and programming failures |
| ECOPACK® lead-free packaging | Meets RoHS and JEDEC JESD97 interconnect classification - supports environmentally compliant legacy system rework |
| UV erasure monitoring | Windowed FDIP32W package enables visual verification of quartz lid integrity prior to UV exposure |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot ROM |
|---|---|
|
Use Scenario: Storing firmware for programmable logic controllers operating in factory-floor environments with temperature cycling and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding initialization code executed at power-on reset; accessed during cold start sequence. Use Value: UV-erasability allows field updates without PCB rework; 55 ns access ensures compatibility with 12 MHz CPU buses. |
Use Scenario: Holding boot loader and configuration data for T1/E1 interface cards deployed in central office switching systems. IC Role / Device Role / Timing Role: Primary ROM for microcontroller startup; retains critical initialization vectors and hardware calibration tables. Use Value: ECOPACK® packaging meets telco environmental standards; electronic signature prevents misprogramming during board-level test. |
| Legacy Medical Instrument Calibration | Military Avionics Configuration Memory |
|
Use Scenario: Storing calibrated sensor offset/gain coefficients in portable diagnostic devices subject to periodic recalibration. IC Role / Device Role / Timing Role: Read-only parameter store accessed during self-test routines; contents unchanged between calibrations. Use Value: 100 µA standby current extends battery life in portable units; UV window enables secure lab-based reprogramming. |
Use Scenario: Retaining flight-critical configuration data in airborne mission computers where long-term data integrity is mandated. IC Role / Device Role / Timing Role: Radiation-tolerant nonvolatile memory for storing aircraft-specific I/O mapping and safety thresholds. Use Value: Ceramic FDIP32W package withstands thermal shock and vibration; 30–40 min UV erasure supports depot-level reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UV-erasable EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C801-120DC | Same 8 Mbit ×8 organization, 55 ns access, but uses PDIP32 plastic package without UV window - OTP-only, no erasure capability | Used where firmware is finalized and field updates are unnecessary; lower cost, no UV handling required | Select when lifecycle stability outweighs field reprogrammability; verify PCB footprint compatibility (PDIP vs FDIP) |
| M27C800-120F1 | 4 Mbit (512K ×8) variant with identical FDIP32W package, 55 ns speed, and same programming/erasure specs | Applied in space-constrained designs with smaller firmware images; shares pinout and programming infrastructure | Choose for reduced density needs; maintains full software and hardware compatibility except memory map size |
Compared with AM27C801-120DC, M27C801-120F1 provides field-erasable flexibility at the cost of UV handling logistics; versus M27C800-120F1, it doubles capacity for larger boot images while retaining identical timing, packaging, and programming flow.
Availability
M27C801-120F1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card boot ROM, legacy medical instrument calibration, and military avionics configuration memory requiring stable component supply across extended product lifecycles.
Supply support for M27C801-120F1 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 microcontrollers, memories, power ICs, and sensors for industrial, automotive, and consumer markets.
The M27C801 belongs to ST's legacy EPROM product line, engineered specifically for high-reliability, field-upgradable firmware storage in systems where UV erasure remains operationally viable and cost-effective over flash alternatives.
FAQ
What UV wavelength and exposure time are required to fully erase M27C801-120F1?
Full erasure requires short-wave ultraviolet light at 2537 Å wavelength with a minimum integrated dose of 30 W·sec/cm². Using a 12,000 µW/cm² lamp, the device must be placed ≤2.5 cm from the source for 30–40 minutes. Ambient fluorescent light may cause partial erasure over years; direct sunlight can erase it in ~1 week.
Can M27C801-120F1 be programmed using standard 5 V logic levels?
No. Programming requires 12.75 V ±0.25 V applied to the GVPP pin and 6.25 V ±0.25 V on VCC - both outside standard 5 V logic ranges. Address and data inputs remain TTL-compatible (0.8 V/2.0 V thresholds), but the high-voltage supply must be externally generated and sequenced correctly relative to VCC.
How does the two-line control (E and G) prevent bus contention in multi-chip memory systems?
E (Chip Enable) gates power to selected devices, placing unselected chips in 100 µA standby with high-impedance outputs; G (Output Enable) independently controls data bus drive. This ensures only one device drives the bus at any time, even when multiple chips share address/data lines - eliminating contention without additional logic.
Is the FDIP32W package of M27C801-120F1 RoHS-compliant?
Yes. The FDIP32W package carries ST's ECOPACK® designation, confirming lead-free construction and compliance with JEDEC JESD97 interconnect classification. The inner box label specifies second-level interconnect category, and soldering profiles meet RoHS reflow requirements.
M27C801-120F1 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:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-CDIP Frit Seal with Window
M27C801-120F1 FAQ
1.How can I place an order for M27C801-120F1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C801-120F1 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 M27C801-120F1 reliable?
The price and inventory of M27C801-120F1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C801-120F1 is usually 5 days.
3.What payment methods are accepted for M27C801-120F1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C801-120F1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C801-120F1?
M27C801-120F1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C801-120F1 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 M27C801-120F1?
For technical support, including M27C801-120F1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C801-120F1 requirements.
6.How does Aetrix verify that M27C801-120F1 is sourced from the original manufacturer or authorized distributors?
All M27C801-120F1 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 M27C801-120F1 meets industry standards.
7.What is the process for return or replacement of M27C801-120F1?
All M27C801-120F1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C801-120F1, 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 M27C801-120F1 part is unused and in its original packaging.
Return procedure for M27C801-120F1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C801-120F1 Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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