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Microchip Technology AT49F002-12PC
- Part No.:
- AT49F002-12PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002-12PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,382
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Product details
Overview
AT49F002-12PC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 55 ns read access time, 10 µs/byte typical programming, 10-second chip erase, sector-based architecture (16K boot block + dual 8K parameter blocks + dual main memory blocks), and hardware data protection with VCC sense and noise filtering.
For engineers reviewing the AT49F002-12PC datasheet, AT49F002-12PC pinout, AT49F002-12PC application, or AT49F002-12PC equivalent, this page delivers verified specifications, validated pin functions, confirmed boot-block lockout behavior, real-world use cases in firmware storage and parameter retention, and two technically documented alternative parts for design flexibility.
Technical Context
The AT49F002-12PC implements a command-register-based architecture requiring six-byte sequences for chip/sector erase and boot-lock enable, with internal timing eliminating external clocks. Its sector organization supports independent erasure of parameter blocks (8K each) and main memory blocks (96K and 128K), while the 16K boot block includes programmable lockout enforced by voltage-level detection (disabled at ≤5.5V).
Operation relies on standard CE/OE/WE control logic identical to EPROMs, enabling drop-in replacement in legacy designs. DATA polling (I/O7 complement) and toggle-bit (I/O6) mechanisms provide reliable end-of-program/erase detection without status registers or dedicated BUSY pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly maps to 8-bit microcontroller data buses without glue logic. |
| Read Access Time | 120 ns max (tACC) - meets timing for 8 MHz Z80 or 68K systems with standard wait-state configuration. |
| Byte Programming Time | 10 µs typical (tBP) - enables fast field updates of small configuration tables or calibration constants. |
| Chip Erase Time | 10 seconds max (tEC) - allows full firmware reflash within interactive diagnostic cycles. |
| Standby Current | 100 µA CMOS (ISB1, commercial temp) - suitable for battery-backed systems requiring low quiescent power. |
| Endurance | 10,000 write/erase cycles - supports multi-year field firmware updates in industrial controllers. |
| Operating Voltage | 5.0 V ±10% - compatible with legacy 5V logic families and eliminates need for auxiliary voltage rails. |
Pinout & Package
AT49F002-12PC uses a 32-pin PDIP (package code 32P6), 0.600" wide, with 0.1" lead pitch. Pin 1 is index-marked; pins 1–16 and 17–32 are on opposite sides. Pin 1 is A16 for DIP package per Atmel's top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A15 used for byte selection, A16/A17 for block decoding. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in shared-memory systems. |
| OE | Output Enable | Active-low output control; decouples data bus during standby or write cycles - essential for multiplexed bus architectures. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - enables standard microprocessor write timing compliance. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; carries program data during write, returns stored data during read, and signals status via DATA polling (I/O7) or toggle bit (I/O6). |
| RESET | Reset Control | Active-low reset input; forces outputs to high-Z and halts ongoing operations - required for safe system reset during firmware update. |
| VCC / GND | Power Supply | Single 5V supply (VCC) and ground (GND); no VPP or auxiliary voltages needed - simplifies PCB power design. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte region (00000H–03FFFH) permanently protected after command sequence - ensures bootloader integrity across firmware field upgrades. |
| DATA Polling Detection | I/O7 returns complement of last programmed byte until completion - eliminates need for external timers or status registers during byte programming. |
| Sector-Erasable Architecture | Independent 8K parameter blocks and dual main memory blocks allow selective erase - enables over-the-air updates without losing calibration or user settings. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes) - prevents accidental corruption during power transients. |
| 5V-Only Reprogramming | No 12V VPP required; all commands executed at 5V - removes high-voltage circuitry, reducing BOM cost and layout complexity. |
Applications
| Embedded Bootloader Storage | Firmware Configuration Parameter Retention |
|---|---|
Use Scenario: Storing immutable startup code in industrial PLCs where bootloader must survive repeated field firmware updates. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware-enforced write protection on 16K boot block. Use Value: Prevents accidental overwrite of critical boot code during remote firmware patches, ensuring system recoverability. | Use Scenario: Holding calibration coefficients and device-specific settings in medical diagnostic equipment between power cycles. IC Role / Device Role / Timing Role: Parameter block (8K × 2) used for infrequently updated but mission-critical configuration data. Use Value: Enables independent erase/reprogram of parameters without disturbing main application firmware or bootloader. |
| Legacy System Firmware Upgrade Path | Industrial Controller Field Update Memory |
Use Scenario: Replacing EPROMs in aging telecom line cards requiring in-system reprogramming without board removal. IC Role / Device Role / Timing Role: Drop-in 5V-compatible Flash with EPROM-style CE/OE/WE interface and 120 ns access. Use Value: Eliminates UV-eraser dependency and socket wear; supports hot-swap firmware patching during maintenance windows. | Use Scenario: Storing field-upgradable control algorithms in programmable logic controllers deployed in remote substations. IC Role / Device Role / Timing Role: Main memory block (96K/128K) hosting application firmware updated via serial interface. Use Value: 10,000-cycle endurance and 10-second full-erase support quarterly algorithm revisions over 10+ year product life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-120EC | 3V core with 5V I/O tolerance; 120 ns access; requires VPP = 12V for programming; no boot-block lockout. | Requires level-shifting for pure 5V systems; lacks hardware-protected boot region. | Choose only if migrating to 3V core architecture and external VPP generation is acceptable. |
| SST39VF020-120-4C-NHE | 3.3V operation only; 120 ns access; single 256K × 8 array; no sector lockout; supports byte-write without pre-erase. | Incompatible with 5V-only systems; no dedicated boot protection; different command set. | Select when redesigning for 3.3V power domain and simplified erase-less write is prioritized over boot security. |
Compared with AM29LV002BT-120EC and SST39VF020-120-4C-NHE, the AT49F002-12PC uniquely delivers 5V-only operation with hardware-enforced boot-block lockout and sector-erasable architecture - making it the only choice for legacy 5V systems requiring guaranteed bootloader integrity and field-upgrade safety.
Availability
AT49F002-12PC is available at Aetrix Electronics and suitable for embedded bootloader storage, firmware configuration parameter retention, and legacy system firmware upgrade path requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002-12PC 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
Atmel Corporation, now part of Microchip Technology, is a semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication devices.
The AT49F002-12PC belongs to Atmel's early-generation 5V Flash memory product line, designed specifically for in-system reprogrammability in industrial and telecom equipment where EPROM replacement and bootloader security were critical requirements.
FAQ
What is the exact memory organization of the AT49F002-12PC?
The AT49F002-12PC contains 2 Mbit (262,144 × 8) of Flash memory, organized as 256K words × 8 bits. Its physical address space is divided into a 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This structure is fixed and confirmed in the Atmel datasheet revision 1017D.
Does the AT49F002-12PC require high voltage for programming?
No, the AT49F002-12PC does not require high voltage for programming. It operates at 5V only for both read and reprogramming functions. All command sequences - including byte programming, sector erase, and boot-block lockout - execute using standard 5V logic levels, eliminating the need for VPP generators or charge pumps.
How is boot block protection implemented in the AT49F002-12PC?
The AT49F002-12PC implements boot block protection via a six-byte command sequence that permanently enables lockout for the 16K-byte boot block (00000H–03FFFH). Once enabled, programming and erasure of this region are inhibited at ≤5.5V. The RESET pin can override lockout only when driven to 12V - a feature confirmed functional in the AT49F002-12PC per datasheet section "Boot Block Programming Lockout Override".
What package type is used by the AT49F002-12PC?
The AT49F002-12PC uses a 32-pin Plastic Dual Inline Package (PDIP), designated as package code 32P6, with 0.600" width and 0.1" lead pitch. This is explicitly listed in the "AT49F002 Ordering Information" table on page 12 of the datasheet, confirming mechanical compatibility with standard through-hole sockets.
Can the AT49F002-12PC be used as a direct replacement for standard EPROMs?
Yes, the AT49F002-12PC is functionally compatible with standard EPROMs in read mode: it uses identical CE/OE/WE control logic, outputs valid data when CE and OE are low and WE is high, and places outputs in high-impedance state when CE or OE is high. Its 120 ns access time matches common 27C256 EPROMs, enabling drop-in replacement in existing 8-bit bus designs without timing or interface changes.
AT49F002-12PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F002-12PC FAQ
1.How can I place an order for AT49F002-12PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002-12PC 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 AT49F002-12PC reliable?
The price and inventory of AT49F002-12PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002-12PC is usually 5 days.
3.What payment methods are accepted for AT49F002-12PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002-12PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002-12PC?
AT49F002-12PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002-12PC 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 AT49F002-12PC?
For technical support, including AT49F002-12PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002-12PC requirements.
6.How does Aetrix verify that AT49F002-12PC is sourced from the original manufacturer or authorized distributors?
All AT49F002-12PC 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 AT49F002-12PC meets industry standards.
7.What is the process for return or replacement of AT49F002-12PC?
All AT49F002-12PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002-12PC, 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 AT49F002-12PC part is unused and in its original packaging.
Return procedure for AT49F002-12PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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