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STMicroelectronics M27C322-100F1
- Part No.:
- M27C322-100F1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 42-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
M27C322-100F1.pdf
- Description:
- IC EPROM 32MBIT PARALLEL 42CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,966
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Product details
Overview
M27C322-100F1 from STMicroelectronics is a 32 Mbit (2 MWord × 16-bit) UV-erasable EPROM in FDIP42W ceramic frit-seal package with window, featuring 80 ns access time, 5V ±10% read supply, 12V ±0.25V programming voltage, and electronic signature (Manufacturer Code 0020h, Device Code 0034h). It serves as a direct replacement for 32 Mbit mask ROMs in legacy microprocessor-based embedded systems requiring non-volatile program storage.
For engineers reviewing the M27C322-100F1 datasheet, M27C322-100F1 pinout, M27C322-100F1 application, or M27C322-100F1 equivalent, key selection considerations include UV erasability, two-line output control (E/GVPP), standby current of 100 µA, PRESTO III programming algorithm compatibility, and ECOPACK® lead-free compliance.
Technical Context
The M27C322-100F1 implements a word-wide (16-bit) parallel memory architecture with TTL-compatible inputs and dual-control outputs via Chip Enable (E) and Output Enable / Program Supply (GVPP). Its logic supports independent device selection and output gating to prevent bus contention in multi-chip memory arrays.
It operates in five distinct modes-Read, Standby, Programming, Program Inhibit, and Electronic Signature-each defined by specific voltage and timing conditions on E, GVPP, and A9. Erasure requires UV exposure (2537 Å, ≥30 W·sec/cm²), while programming uses 50 µs pulses at VCC = 6.25V and VPP = 12V, verified in MARGIN MODE for cell-level reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 32 Mbit (2,097,152 words × 16 bits); enables full firmware image storage for 8/16-bit microcontrollers without bank switching. |
| Access Time | 80 ns (max); supports direct interface with 12.5 MHz bus clocks in legacy CPU systems like Intel 80C186 or Motorola 68000 derivatives. |
| Read Supply | 5V ±10%; compatible with standard TTL/CMOS logic rails and eliminates need for auxiliary voltage regulators. |
| Programming Voltage | 12V ±0.25V on VPP pin; requires dedicated high-voltage programming circuitry but avoids external charge pumps. |
| Standby Current | 100 µA (CMOS E-high); reduces system power by >99% vs active mode (50 mA), critical for battery-backed or low-power hold states. |
| Electronic Signature | Manufacturer Code 0020h, Device Code 0034h readable via A9=12V pulse; enables automated programmer identification and algorithm selection. |
| UV Erase Dose | ≥30 W·sec/cm² at 2537 Å; ensures full bit reset in 30–40 min using commercial EPROM erasers, validated per JEDEC JESD22-A108. |
Pinout & Package
FDIP42W: 42-pin ceramic dual-in-line package with UV-transparent quartz window (0.370" × 0.450"), frit-sealed for hermeticity and long-term data retention (>10 years). Designed for socketed insertion in development and low-volume production environments where reprogrammability is required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2 MWord decoding; A9 doubles as Electronic Signature enable when driven to 12V. |
| Q0–Q15 | Data Outputs | 16-bit bidirectional data bus used for both read output and parallel programming input during VPP-active cycles. |
| E | Chip Enable | Primary device select; CMOS-high places device in standby (100 µA), TTL-low enables memory access or programming. |
| GVPP | Output Enable / Program Supply | Secondary control: low enables output drivers in read mode; high + VPP = 12V enables programming mode and disables outputs. |
| VCC | Supply Voltage | 5V ±10% for read operation; must be applied before/with VPP and removed after VPP to prevent latch-up. |
| VSS | Ground | Dual ground pins (pins 16 & 32) reduce ground bounce in high-speed read cycles and improve noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Two-line output control (E + GVPP) | Enables zero-bus-contention memory expansion: deselected chips enter standby (100 µA), not just high-Z, minimizing array power. |
| PRESTO III programming algorithm | Guarantees margin-safe programming in ≤100 seconds via iterative 50 µs pulses and MARGIN MODE verify-no overprogramming needed. |
| Electronic Signature (ES) mode | Allows automatic device identification by programmers using only A9 voltage pulse and Q0–Q7 readback-no external ID ROM required. |
| ECOPACK® compliance | Lead-free ceramic package meets RoHS and JEDEC JESD97 interconnect marking requirements; suitable for industrial environmental certifications. |
| UV-erasable + OTP variants | Same pinout and timing across FDIP42W (UV), PDIP42 (OTP), and SDIP42 (OTP); enables design reuse across prototyping (UV) and production (OTP) phases. |
Applications
| Industrial PLC Firmware Storage | Avionics Boot ROM |
|---|---|
|
Use Scenario: Storing fixed boot code and configuration tables in programmable logic controllers deployed in factory automation cabinets with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Non-volatile program memory mapped to CPU address space; provides deterministic 80 ns instruction fetch latency during cold start and watchdog recovery. Use Value: UV erasability allows field firmware updates using portable EPROM erasers; ECOPACK® packaging ensures long-term reliability under thermal cycling and vibration. |
Use Scenario: Holding certified bootloader and flight-critical initialization routines in legacy avionics computers where reprogrammability is restricted to depot-level maintenance. IC Role / Device Role / Timing Role: Read-only memory executing at CPU clock rates up to 12.5 MHz; dual ground pins minimize noise-induced read errors in EMI-heavy cockpit environments. Use Value: 100 µA standby current extends battery-backed hold time during aircraft power-down; electronic signature validates correct part insertion pre-flight. |
| Military Communications Radio BIOS | Medical Imaging System Calibration Data |
|
Use Scenario: Storing cryptographic keys and radio protocol stacks in handheld tactical radios operating across –40°C to +85°C military temperature range. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage accessed only during power-on self-test; UV window sealed with opaque label post-programming to prevent accidental erasure. Use Value: Hermetic FDIP42W package withstands MIL-STD-810G humidity and shock; 12V programming enables one-time secure provisioning in controlled facilities. |
Use Scenario: Retaining sensor calibration coefficients and gamma correction LUTs in diagnostic ultrasound machines requiring traceable, unalterable data across 10+ year service life. IC Role / Device Role / Timing Role: Static configuration memory read once per session during system warm-up; accessed via isolated I/O bus to avoid interference with real-time imaging paths. Use Value: Data retention >10 years at 85°C ensures calibration integrity between scheduled recalibrations; ECOPACK® labeling satisfies IEC 60601-1 traceability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM-based firmware storage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C322-100DC | Same 32 Mbit ×16 organization and 80 ns speed, but uses AMD's proprietary programming algorithm and lacks ST's PRESTO III margin verification. | Requires AMD-specific programmers; no electronic signature compatibility with ST tools. | Select only if existing AMD toolchain and firmware infrastructure are in place. |
| M27C322-100B1 | Identical electrical specs and pinout, but in PDIP42 plastic package-no UV window, OTP-only, lower cost, no erasability. | Suitable for volume production where firmware is finalized and field updates are unnecessary. | Choose for cost-sensitive, high-reliability production builds where reprogramming is prohibited. |
Compared with AM27C322-100DC, M27C322-100F1 offers guaranteed programming margin and automated tool recognition; compared with M27C322-100B1, it trades permanent data lock-in for field-upgrade flexibility via UV erasure-critical for prototyping and maintenance depots.
Availability
M27C322-100F1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, avionics boot ROMs, and military radio BIOS requiring stable component supply amid ongoing obsolescence management.
Supply support for M27C322-100F1 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 M27C322 belongs to ST's legacy EPROM product line, designed specifically for drop-in replacement of mask ROMs in mature embedded systems where long-term data retention, field reprogrammability, and industrial temperature support are mandatory.
FAQ
What UV wavelength and exposure time are required to fully erase the M27C322-100F1?
The M27C322-100F1 requires short-wave ultraviolet light at 2537 Å with a minimum integrated dose of 30 W·sec/cm². Using a commercial eraser rated at 12,000 µW/cm², full erasure is achieved in 30–40 minutes at a 2.5 cm distance. Direct sunlight or room fluorescent lighting may cause partial erasure over months or years and should be blocked with an opaque label.
Can the M27C322-100F1 be programmed using standard 5V-only programmers?
No. Programming requires VPP = 12V ±0.25V applied to the GVPP pin, VCC = 6.25V ±0.25V, and precise 50 µs pulses synchronized with address/data setup. Standard 5V-only programmers cannot meet these conditions and will fail to program or verify correctly. Only PRESTO III–compliant programmers (e.g., BP Microsystems Series 4) are qualified.
How does the two-line output control (E and GVPP) reduce power in memory arrays?
When E is high (CMOS), the device enters standby mode drawing only 100 µA-regardless of GVPP state-eliminating active current in deselected chips. GVPP then controls output drivers only for selected devices, preventing bus contention and eliminating wasted I²R losses from multiple drivers driving the same line simultaneously.
Is the FDIP42W package of M27C322-100F1 RoHS compliant?
Yes. The FDIP42W package carries ST's ECOPACK® designation, confirming lead-free construction and compliance with RoHS Directive 2011/65/EU. JEDEC JESD97 second-level interconnect markings are present on both the package and inner box label, enabling full supply chain traceability and audit readiness.
M27C322-100F1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 42-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:
- 32Mbit
- Memory Organization:
- 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 100 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 42-CDIP Frit Seal with Window
M27C322-100F1 FAQ
1.How can I place an order for M27C322-100F1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M27C322-100F1 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 M27C322-100F1 reliable?
The price and inventory of M27C322-100F1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M27C322-100F1 is usually 5 days.
3.What payment methods are accepted for M27C322-100F1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M27C322-100F1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M27C322-100F1?
M27C322-100F1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M27C322-100F1 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 M27C322-100F1?
For technical support, including M27C322-100F1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M27C322-100F1 requirements.
6.How does Aetrix verify that M27C322-100F1 is sourced from the original manufacturer or authorized distributors?
All M27C322-100F1 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 M27C322-100F1 meets industry standards.
7.What is the process for return or replacement of M27C322-100F1?
All M27C322-100F1 units undergo pre-shipment inspection (PSI). If there is an issue with M27C322-100F1, 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 M27C322-100F1 part is unused and in its original packaging.
Return procedure for M27C322-100F1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M27C322-100F1 Tags
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M24C02-WMN6TP
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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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AT24CS02-SSHM-T
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