My Inquiry
My Account
STMicroelectronics M27C512-90F6
- Part No.:
- M27C512-90F6
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 28-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C512-90F6.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,034
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M27C512-90F6 from STMicroelectronics is a 512 Kbit (64K × 8) UV-erasable EPROM in FDIP28W ceramic frit-seal package with transparent window, featuring 90 ns access time, 5 V ±10% read supply, 12.75 V ±0.25 V programming voltage, and electronic signature (manufacturer code 20h, device code 3Dh) for automated programmer recognition - used in legacy industrial controllers, boot ROMs, and firmware storage where field erasure and reprogramming are required.
For engineers reviewing the M27C512-90F6 datasheet, M27C512-90F6 pinout, M27C512-90F6 application, or M27C512-90F6 equivalent, this page delivers verified timing parameters, FDIP28W terminal mapping, standby/program/read mode behavior, UV erasure requirements, and direct alternatives with documented functional trade-offs.
Technical Context
The M27C512-90F6 operates in three primary modes: Read (E = VIL, GVPP = VIL), Standby (E = VIH), and Programming (E pulsed low with GVPP = 12.75 V). It uses two-line output control (E for chip select, G for output enable) to minimize bus contention and power in multi-device memory arrays.
Programming employs the PRESTO IIB algorithm with 100 µs pulses per byte and margin-mode verification at elevated VCC (6.25 V) and VPP (12.75 V); erasure requires ≥15 W·sec/cm² UV exposure (2537 Å) through the FDIP28W window, typically 15–20 minutes at 12,000 µW/cm² intensity within 2.5 cm of lamp.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8) - supports full 16-bit address space with byte-wide data interface |
| Access Time (tAVQV) | 90 ns - defines maximum clock-to-data delay in read mode under standard AC conditions |
| Read Supply Voltage | 5 V ±10% - compatible with legacy TTL/CMOS logic rails without level shifting |
| Programming Voltage (GVPP) | 12.75 V ±0.25 V - requires dedicated high-voltage supply; not derived from VCC |
| Standby Current | 100 µA - enables low-power retention in battery-backed or intermittent-use systems |
| Electronic Signature | Manufacturer code 20h / Device code 3Dh - enables automatic algorithm selection in universal programmers |
| UV Erase Dose | ≥15 W·sec/cm² at 2537 Å - specifies minimum UV energy for full bit reset; windowed FDIP28W package required |
Pinout & Package
FDIP28W (28-pin ceramic frit-seal DIP with UV-transparent window) - hermetically sealed, lead-free ECOPACK® compliant, designed for long-term data retention and repeat UV erasure cycles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; A9 carries 11.5–12.5 V during Electronic Signature mode |
| Q0–Q7 | Data Outputs | Bi-directional during programming (data-in), output-only during read; TTL/CMOS compatible |
| E | Chip Enable | Active-low primary device select; controls active/standby current transition (30 mA ↔ 100 µA) |
| GVPP | Output Enable / Program Supply | Low during read (enables outputs), high at 12.75 V during programming (powers internal programming circuitry) |
| VCC | Supply Voltage | 5 V ±10% for read; 6.25 V ±0.25 V required during programming |
| VSS | Ground | Reference for all inputs/outputs; requires local 0.1 µF ceramic decoupling |
| NC | No Connect | Pins 9 and 25 are internally unconnected - must be left floating or tied to VSS per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + GVPP) | Eliminates bus contention in multi-chip memory arrays by independently gating chip select and output drivers |
| PRESTO IIB programming algorithm | Reduces full-array programming time to ~6 s with margin-mode verify, avoiding over-programming wear |
| Electronic Signature (ES) mode | Enables auto-detection of manufacturer (20h) and device (3Dh) by programmers - no manual part selection needed |
| ECOPACK® compliance | Lead-free ceramic package meeting JEDEC JESD97 second-level interconnect marking and RoHS requirements |
| UV erasability | Full bit reset via 2537 Å UV light through FDIP28W window - supports firmware iteration without hardware replacement |
Applications
| Industrial PLC Boot ROM | Legacy Test Equipment Firmware |
|---|---|
|
Use Scenario: Stores boot code and configuration data in programmable logic controllers operating in factory-floor environments with ambient fluorescent lighting. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU reset vector; accessed during cold start with 90 ns tAVQV timing constraint. Use Value: FDIP28W window allows on-site firmware updates via UV erasure and reprogramming - avoids board replacement during revision cycles. |
Use Scenario: Holds calibration routines and instrument control microcode in benchtop oscilloscopes and signal generators produced 1990–2010. IC Role / Device Role / Timing Role: Static firmware store executing directly from address space; relies on E/G dual-control to coexist with RAM and I/O peripherals on shared bus. Use Value: Electronic Signature (20h/3Dh) ensures correct programming algorithm selection across mixed-EPROM production lines. |
| Avionics Maintenance Terminal | Medical Imaging System BIOS |
|
Use Scenario: Stores diagnostic firmware and configuration tables in portable avionics test sets requiring field-upgradable software under FAA DO-254 guidance. IC Role / Device Role / Timing Role: Read-only memory accessed during power-on self-test (POST); standby current ≤100 µA minimizes battery drain during storage. Use Value: UV erasability enables secure, traceable firmware versioning - each erase cycle leaves physical evidence on silicon. |
Use Scenario: Contains initialization code and hardware abstraction layer for X-ray detector control boards in FDA-cleared imaging systems. IC Role / Device Role / Timing Role: Boot ROM mapped at fixed address; 90 ns access ensures deterministic startup timing within safety-critical boot sequence. Use Value: ECOPACK® lead-free packaging meets medical device material restrictions while maintaining UV erasure capability for regulatory audit trails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UV-erasable EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C512-90DC | 90 ns access, PDIP28 package, no UV window - OTP-only; same 5 V read, 12.75 V program voltage | Cannot be erased or reprogrammed post-assembly; suitable only for final-production firmware with zero revision risk | Select when field updates are unnecessary and cost-sensitive plastic packaging is preferred |
| M27C256B-90F1 | 256 Kbit (32K × 8), same FDIP28W package, 90 ns, identical programming/erasure specs | Half capacity limits use in larger boot images; pin-compatible but requires address decoding adjustment | Select when firmware size fits 256 Kbit and legacy board footprint reuse is mandatory |
Compared with M27C512-90F6, AM27C512-90DC eliminates UV erasure capability for lower cost and higher reliability in fixed-function systems, while M27C256B-90F1 reduces density but maintains identical package, timing, and programming compatibility for capacity-constrained designs.
Availability
M27C512-90F6 is available at Aetrix Electronics and suitable for industrial PLC boot ROMs, legacy test equipment firmware, and avionics maintenance terminals requiring stable component supply, long-lifecycle support, and traceable UV-erasable memory.
Supply support for M27C512-90F6 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 strong heritage in nonvolatile memory.
The M27C512 belongs to ST's legacy EPROM product line, designed specifically for applications demanding field-erasable firmware storage with mechanical robustness and long-term data retention in harsh environments.
FAQ
What UV wavelength and exposure time are required to fully erase M27C512-90F6?
Full erasure requires short-wave ultraviolet light at 2537 Å wavelength with a minimum integrated dose of 15 W·sec/cm². Using a 12,000 µW/cm² lamp placed within 2.5 cm of the FDIP28W window, erasure takes 15–20 minutes. Direct sunlight may cause partial erasure in ~1 week; ambient fluorescent lighting risks gradual degradation over years.
Can M27C512-90F6 be programmed using standard 5 V logic levels?
No. Programming requires VCC = 6.25 V ±0.25 V and GVPP = 12.75 V ±0.25 V applied simultaneously; address and data inputs remain TTL-compatible (0–3 V), but the high-voltage GVPP rail must be supplied separately. Standard 5 V-only programmers cannot program this device without voltage boosting.
Is the FDIP28W package RoHS-compliant?
Yes. The FDIP28W variant of M27C512-90F6 is offered in ST's ECOPACK® format, which is lead-free and complies with RoHS Directive 2011/65/EU. JEDEC JESD97 second-level interconnect markings appear on both package and inner box label.
How does the Electronic Signature mode function during programming setup?
Electronic Signature mode activates when 11.5–12.5 V is applied to A9 while E = VIL and GVPP = VIL. Toggling A0 reads manufacturer code (20h) at A0 = VIL and device code (3Dh) at A0 = VIH on Q7–Q0. This occurs at 25°C ±5°C and enables automatic algorithm selection in compatible programmers like Data I/O PS-29.
M27C512-90F6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 28-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:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-CDIP Frit Seal with Window
M27C512-90F6 FAQ
1.How can I place an order for M27C512-90F6 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C512-90F6 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 M27C512-90F6 reliable?
The price and inventory of M27C512-90F6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C512-90F6 is usually 5 days.
3.What payment methods are accepted for M27C512-90F6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C512-90F6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C512-90F6?
M27C512-90F6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C512-90F6 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 M27C512-90F6?
For technical support, including M27C512-90F6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C512-90F6 requirements.
6.How does Aetrix verify that M27C512-90F6 is sourced from the original manufacturer or authorized distributors?
All M27C512-90F6 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 M27C512-90F6 meets industry standards.
7.What is the process for return or replacement of M27C512-90F6?
All M27C512-90F6 units undergo pre-shipment inspection (PSI). If there is an issue with M27C512-90F6, 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 M27C512-90F6 part is unused and in its original packaging.
Return procedure for M27C512-90F6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C512-90F6 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
