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STMicroelectronics M27C801-80F1
- Part No.:
- M27C801-80F1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 32-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C801-80F1.pdf
- Description:
- IC EPROM 8MBIT PARALLEL 32CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,339
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Product details
Overview
M27C801-80F1 from STMicroelectronics is an 8 Mbit (1,048,576 × 8) UV-erasable EPROM in a 32-pin FDIP32W ceramic frit-seal package with 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 in legacy industrial controllers and telecom line cards requiring field-erasable nonvolatile memory.
For engineers reviewing the M27C801-80F1 datasheet, M27C801-80F1 pinout, M27C801-80F1 application, or M27C801-80F1 equivalent, this page delivers verified electrical specs, UV erasure guidance, two-line output control logic, and ECOPACK® lead-free packaging compliance - all critical for legacy system maintenance, reprogramming workflows, and RoHS-compliant replacement sourcing.
Technical Context
The M27C801-80F1 implements TTL-compatible address/data interface with dual active-low control: Chip Enable (E) governs power state and device selection, while Output Enable (G, labeled GVPP on pinout) controls output buffer gating - enabling low-power standby (100 µA) and eliminating bus contention in multi-chip memory arrays. Its logic diagram confirms full 20-bit address decoding (A0–A19) and 8-bit bidirectional data I/O (Q0–Q7).
Programming uses Presto IIB algorithm with 50 µs/word pulses at VCC = 6.25 V ±0.25 V and VPP = 12.75 V ±0.25 V; electronic signature mode (A9 = 11.5–12.5 V) returns manufacturer code 20h and device code 42h on Q7–Q0. UV erasure requires ≥30 W·sec/cm² at 2537 Å wavelength, achievable in 30–40 min at ≤2.5 cm distance from unfiltered lamp.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Mbit (1,048,576 × 8 bits) - supports full 1 MB of firmware or boot code without banking. |
| Access time | 55 ns - enables direct interfacing with 12–18 MHz microcontrollers without wait states. |
| Read supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails and legacy 5 V systems. |
| Programming voltage | 12.75 V ±0.25 V - requires dedicated EPROM programmer with regulated VPP rail; not compatible with 5 V-only programmers. |
| Standby current | 100 µA - reduces system power by >99% vs active mode (35 mA), critical for battery-backed applications. |
| UV erasure dose | ≥30 W·sec/cm² at 2537 Å - defines minimum UV exposure to fully reset all bits to '1' state. |
| Operating temp | –40 °C to +85 °C - qualified for industrial temperature range, suitable for base station and PLC environments. |
Pinout & Package
Package: FDIP32W (32-pin ceramic frit-seal DIP with UV-transparent window, 0.600" width). Pin 1 index corner marked; window centered over die for uniform UV exposure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address inputs | 20-bit address bus; fully decoded to select one of 1,048,576 bytes; TTL-compatible thresholds. |
| Q0–Q7 | Data inputs/outputs | Bidirectional 8-bit data bus; outputs driven during Read/Verify; inputs latched during Programming. |
| E | Chip Enable | Active-low primary enable; places device in Standby (100 µA) when high; initiates programming when pulsed low with VPP applied. |
| GVPP | Output Enable / Program Supply | Active-low output gate during Read; carries 12.75 V programming voltage during write cycles - dual-function pin requiring level-shifting circuitry. |
| VCC | Supply voltage | +5 V ±10% for Read; +6.25 V ±0.25% for Programming - strict voltage separation prevents latch-up. |
| VSS | Ground | Signal and power return; decoupling requires 0.1 µF ceramic capacitor placed within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + GVPP) | Eliminates bus contention in multi-device memory maps by independently gating power (E) and output drivers (GVPP). |
| Presto IIB programming algorithm | Guarantees margin-safe programming in ≤52.5 s via iterative 50 µs pulses and margin-mode verify - no over-programming required. |
| Electronic signature (20h/42h) | Enables automatic algorithm selection in programmers by reading manufacturer (20h) and device ID (42h) at A9 = 12 V. |
| ECOPACK® lead-free packaging | Meets JEDEC JESD97 interconnect category marking; RoHS-compliant ceramic package with frit-seal hermeticity. |
| UV erasure verification window | Quartz window aligned to die center ensures uniform 2537 Å UV exposure; opaque label recommended for long-term storage under fluorescent light. |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot ROM |
|---|---|
Use Scenario: Storing ladder logic firmware in programmable logic controllers deployed in factory automation cabinets with ambient temperatures up to 85 °C. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding initialization code executed at power-on; accessed via 8-bit parallel bus with 55 ns timing. Use Value: UV erasability allows field updates without PCB rework; FDIP32W package withstands thermal cycling and vibration in DIN-rail enclosures. |
Use Scenario: Holding boot loader and DSP configuration data in T1/E1 line interface cards operating in central office environments. IC Role / Device Role / Timing Role: Primary boot ROM mapped to CPU address space; selected using E signal synchronized to system clock edge. Use Value: 100 µA standby current extends backup battery life during power-fail holdover; electronic signature prevents misprogramming in automated test fixtures. |
| Legacy Medical Imaging Controller | Military Radio Firmware Archive |
Use Scenario: Archiving FPGA configuration bitstreams and calibration tables in X-ray generator control units requiring 10+ year data retention. IC Role / Device Role / Timing Role: Static memory mapped as read-only region; accessed only during startup or service mode via dedicated address decoder. Use Value: Ceramic FDIP32W package provides hermetic sealing against humidity-induced bit corruption; UV window enables secure firmware reversion during recalibration. |
Use Scenario: Storing cryptographic keys and radio protocol stacks in HF/VHF tactical radios subject to MIL-STD-810G environmental stress. IC Role / Device Role / Timing Role: Tamper-evident firmware store; UV window physically sealed until authorized reprogramming event. Use Value: Erasure time predictability (30–40 min at spec dose) enables controlled key lifecycle management; ECOPACK® compliance meets DoD hazardous substance directives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UV-erasable EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C801-80DC | Same 8 Mbit × 8 organization and 55 ns speed, but uses AMD's proprietary programming algorithm and signature codes (01h/42h); requires AMD-specific programmer firmware. | Compatible pinout and AC timing, but lacks ST's Presto IIB margin verification - higher risk of marginal writes in high-temp operation. | Select only if existing AMD programmer infrastructure is in place; verify margin-mode readback capability before deployment. |
| MX27C801-80PC | Macronix variant with identical FDIP32W package and 55 ns access, but specifies VPP = 12.5 V ±0.5 V and wider programming voltage tolerance. | Accepts broader VPP range, easing compatibility with aging lab programmers; however, electronic signature differs (C2h/42h) and UV erasure dose is 40 W·sec/cm². | Prefer for brownfield sites with non-ST-certified programmers; confirm UV lamp intensity calibration matches higher dose requirement. |
Compared with AM27C801-80DC and MX27C801-80PC, the M27C801-80F1 offers tighter VPP regulation (±0.25 V), integrated margin-mode verify, and lower standby current (100 µA vs 200 µA typical), making it optimal for thermally constrained or battery-sensitive legacy systems where programming reliability and power efficiency are prioritized over programmer flexibility.
Availability
M27C801-80F1 is available at Aetrix Electronics and suitable for industrial PLC firmware updates, telecom line card reprogramming, and legacy medical imaging controller maintenance requiring stable component supply across extended product lifecycles.
Supply support for M27C801-80F1 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 M27C801 belongs to ST's legacy EPROM product line, engineered specifically for field-upgradable firmware storage in systems where UV erasure provides secure, low-cost reprogramming without soldering - targeting industrial control, telecom infrastructure, and defense electronics.
FAQ
Can M27C801-80F1 be programmed with a generic 5 V-only EPROM programmer?
No. The M27C801-80F1 requires a dedicated 12.75 V ±0.25 V programming voltage on the GVPP pin during write cycles, and VCC must be raised to 6.25 V ±0.25 V. Standard 5 V programmers lack this dual-rail capability and will fail to program or damage the device. ST-approved programmers such as the Data I/O PS-29xx series or BP Microsystems Model 3000 are required.
What is the minimum UV exposure time needed to fully erase M27C801-80F1?
Full erasure requires ≥30 W·sec/cm² total UV dose at 2537 Å wavelength. Using a standard 12,000 µW/cm² lamp, the M27C801-80F1 must be placed ≤2.5 cm from the lamp tube for 30–40 minutes. Erasure verification must be performed via read-back after cooling; partial exposure yields incomplete bit reset and intermittent read failures.
Is the FDIP32W package of M27C801-80F1 RoHS compliant?
Yes. The FDIP32W package carries ST's ECOPACK® designation, confirming lead-free construction and compliance with JEDEC JESD97 interconnect category marking. The ceramic body and frit-seal process eliminate Pb-based glass frit; RoHS documentation is available in ST's ECOPACK® database at www.st.com/ecopack.
How does the two-line control (E and GVPP) prevent bus contention in multi-chip memory systems?
E (Chip Enable) places deselected devices into 100 µA standby mode, cutting internal power and forcing outputs to high-impedance regardless of GVPP state. GVPP (Output Enable) then gates only the selected device's outputs onto the shared data bus. This ensures exactly one device drives the bus at any time - eliminating contention even when multiple EPROMs share address/data lines and are decoded by overlapping address ranges.
M27C801-80F1 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:
- 80 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
M27C801-80F1 FAQ
1.How can I place an order for M27C801-80F1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C801-80F1 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 M27C801-80F1 reliable?
The price and inventory of M27C801-80F1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C801-80F1 is usually 5 days.
3.What payment methods are accepted for M27C801-80F1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C801-80F1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C801-80F1?
M27C801-80F1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C801-80F1 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 M27C801-80F1?
For technical support, including M27C801-80F1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C801-80F1 requirements.
6.How does Aetrix verify that M27C801-80F1 is sourced from the original manufacturer or authorized distributors?
All M27C801-80F1 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 M27C801-80F1 meets industry standards.
7.What is the process for return or replacement of M27C801-80F1?
All M27C801-80F1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C801-80F1, 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 M27C801-80F1 part is unused and in its original packaging.
Return procedure for M27C801-80F1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C801-80F1 Tags
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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
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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
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AT24C08C-STUM-T
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