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Microchip Technology AT49F002NT-12PC
- Part No.:
- AT49F002NT-12PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002NT-12PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,473
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Product details
Overview
AT49F002NT-12PC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 120 ns read access time, sector-based architecture (16K-byte boot block + two 8K-byte parameter blocks + two main memory blocks), 10 µs/byte programming, and hardware data protection. It serves as nonvolatile program/data storage in embedded controllers requiring field-upgradable firmware.
For engineers reviewing the AT49F002NT-12PC datasheet, AT49F002NT-12PC pinout, AT49F002NT-12PC application, or AT49F002NT-12PC equivalent, key selection considerations include boot block lockout capability, 5V-only command interface, sector erase granularity, DATA polling/Toggle Bit end-of-write detection, and industrial temperature support (-40°C to +85°C).
Technical Context
The AT49F002NT-12PC implements a command-register-based architecture for byte programming, sector erase, and chip erase using standard microprocessor timing-no external high-voltage programming supply required. Its internal control logic handles timing-critical operations including erase verification and program pulse generation.
It features dual-line enable control (CE/OE) for bus contention avoidance, RESET-driven boot block override (12 V on RESET pin), and hardware safeguards including VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and write-inhibit logic (OE low / CE high / WE high disables writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 120 ns - determines maximum sustained read throughput in CPU-bus-coupled systems |
| Byte Programming Time | 10 µs typical - enables fast incremental firmware updates without full-block rewrites |
| Erase Cycle Time | 10 seconds max - defines minimum latency for sector or chip erase operations |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware |
| Boot Block Protection | 16K-byte region with lockout command; override via 12 V on RESET pin - ensures secure bootloader integrity |
| Operating Voltage | 5 V ±10% - compatible with legacy 5 V logic families and eliminates level-shifting requirements |
Pinout & Package
AT49F002NT-12PC is packaged in a 32-pin, 0.600" wide plastic DIP (PDIP) package (package code 32P6), with 0.1" lead pitch and through-hole mounting. Pin 1 is marked by a notch or dot; pin 16 is GND, pin 32 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A14 used for software ID mode |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; supports read, byte program, and product ID data transfer |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during reads |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override |
| GND | Ground Reference | Signal and power ground (pin 16); required for stable operation and noise immunity |
| VCC | Power Supply | +5 V ±10% supply (pin 32); powers core logic, memory array, and I/O buffers |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (96K/128K bytes) enable selective firmware updates without erasing critical code |
| Hardware Data Protection | VCC sense, noise filtering, and multi-signal write inhibit prevent accidental writes during power transients or EMI events |
| Boot Block Lockout | One-time programmable lock prevents unauthorized modification of bootloader code; override available only via 12 V RESET signal |
| 5V-Only Command Interface | No external high-voltage generator needed - simplifies system design and reduces BOM cost vs. EPROM or older Flash devices |
| DATA Polling & Toggle Bit | Dual, software-accessible status mechanisms eliminate fixed wait states and improve host CPU efficiency during write cycles |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router Boot Code |
|---|---|
Use Scenario: Storing boot firmware and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile storage for bootloader, FPGA configuration bitstreams, and runtime calibration tables; accessed at power-on reset and during field firmware upgrades. Use Value: Sector erase allows updating application firmware while preserving bootloader and calibration data; industrial temp rating (-40°C to +85°C) ensures reliability across ambient extremes. |
Use Scenario: Holding secure boot code and network stack initialization routines in enterprise-grade routers with remote update capability. IC Role / Device Role / Timing Role: Primary boot memory mapped into CPU address space; provides deterministic 120 ns read access for fast boot sequence execution. Use Value: Boot block lockout prevents corruption of trusted bootloader during OTA updates; DATA polling enables precise timing control of flash write operations. |
| Medical Diagnostic Device Configuration | Automotive Body Control Module (BCM) |
Use Scenario: Retaining device-specific calibration coefficients, safety-critical startup sequences, and regulatory compliance data in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA/IEC 62304-compliant firmware elements; accessed during self-test and power-up initialization. Use Value: Hardware write protection and 10,000-cycle endurance ensure long-term data integrity; 5V-only interface simplifies integration with legacy 5 V microcontrollers. |
Use Scenario: Hosting firmware for lighting control, window lift, and door lock logic in automotive BCMs requiring in-vehicle reprogramming. IC Role / Device Role / Timing Role: In-system reprogrammable memory for ECU firmware updates via CAN diagnostics; supports both full and partial reflash operations. Use Value: Sector architecture enables safe over-the-air updates of application code while protecting bootloader; RESET-driven override allows recovery from corrupted boot sectors. |
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 | 3 V core / 5 V I/O; 120 ns access; 2 Mbit; no RESET-based boot override | Requires voltage translation in pure 5 V systems; lacks 12 V boot unlock feature | Choose when lower active power is prioritized and boot block override is unnecessary |
| SST39VF020-120-4C-NHE | 3.3 V only; 120 ns access; 2 Mbit; Top/Bottom boot block configurable via hardware pins | Incompatible with 5 V bus; boot block location fixed by package pin strapping, not software command | Choose for new 3.3 V designs where pin-strapped boot configuration suffices and 5 V tolerance is not required |
Compared with AM29LV002BT-120EC and SST39VF020-120-4C-NHE, the AT49F002NT-12PC uniquely combines 5 V-only operation, software-configurable boot lockout, and 12 V RESET-based recovery-making it optimal for legacy 5 V embedded systems requiring robust, field-serviceable firmware security.
Availability
AT49F002NT-12PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router boot code, and medical diagnostic device configuration requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for AT49F002NT-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 ICs for industrial, automotive, and consumer applications.
The AT49F002NT-12PC belongs to Atmel's early-generation 5 V Flash memory product line, designed specifically for in-system reprogrammability in cost-sensitive, 5 V-based embedded systems requiring field-upgradable firmware and hardware-level data protection.
FAQ
What is the memory organization of the AT49F002NT-12PC?
The AT49F002NT-12PC contains 2 Mbit of Flash memory organized as 262,144 words × 8 bits (256K × 8). Its physical address space is segmented into a 16K-byte boot block (3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This layout supports selective erase and programming without affecting protected regions.
Does the AT49F002NT-12PC support 5 V-only programming?
Yes, the AT49F002NT-12PC supports full 5 V-only operation for both read and reprogramming. It requires no external high-voltage supply (e.g., 12 V) for standard programming or erase functions-only the 12 V RESET signal enables boot block override. All command sequences use standard 5 V logic levels and microprocessor-compatible timing.
How does the boot block lockout feature work on the AT49F002NT-12PC?
The AT49F002NT-12PC's boot block lockout is enabled via a six-cycle command sequence (5555H/AA, 2AAAH/55, 5555H/80, 5555H/AA, 2AAAH/55, 5555H/40). Once activated, the 16K-byte boot block (3C000H–3FFFFH) becomes permanently write-protected under 5.5 V. Unlocking requires applying 12 V ±0.5 V to the RESET pin-a hardware-level recovery mechanism unique to this variant.
What are the supported erase methods for the AT49F002NT-12PC?
The AT49F002NT-12PC supports three erase methods: chip erase (entire memory except locked boot block), sector erase (individual 8K-byte parameter blocks or main memory blocks), and boot block erase (only possible after 12 V RESET override). Erase timing is fully internal-no external clocks or timers are needed-and completes in ≤10 seconds per operation.
Is the AT49F002NT-12PC pin-compatible with other AT49F002 variants?
Yes, the AT49F002NT-12PC shares identical pinout, package footprint (32P6 PDIP), and electrical interface with all AT49F002, AT49F002N, and AT49F002T variants. Differences lie in memory mapping (boot block at 3C000H–3FFFFH for "T" suffix) and RESET functionality (12 V override supported only on "T" and "NT" versions, not "N" variants).
AT49F002NT-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
AT49F002NT-12PC FAQ
1.How can I place an order for AT49F002NT-12PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002NT-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 AT49F002NT-12PC reliable?
The price and inventory of AT49F002NT-12PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002NT-12PC is usually 5 days.
3.What payment methods are accepted for AT49F002NT-12PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002NT-12PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002NT-12PC?
AT49F002NT-12PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002NT-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 AT49F002NT-12PC?
For technical support, including AT49F002NT-12PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002NT-12PC requirements.
6.How does Aetrix verify that AT49F002NT-12PC is sourced from the original manufacturer or authorized distributors?
All AT49F002NT-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 AT49F002NT-12PC meets industry standards.
7.What is the process for return or replacement of AT49F002NT-12PC?
All AT49F002NT-12PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002NT-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 AT49F002NT-12PC part is unused and in its original packaging.
Return procedure for AT49F002NT-12PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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