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Microchip Technology AT49F002N-55PI
- Part No.:
- AT49F002N-55PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002N-55PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,671
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Product details
Overview
AT49F002N-55PI from Microchip Technology (formerly Atmel) is a 2-Mbit (256K × 8) 5V-only in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 55 ns read access time, 10 µs/byte typical programming, 10-second chip erase, 10,000 write cycles, and hardware data protection - enabling secure firmware updates in industrial control panels.
For engineers reviewing the AT49F002N-55PI datasheet, AT49F002N-55PI pinout, AT49F002N-55PI application, or AT49F002N-55PI equivalent, this page provides verified technical context, sector architecture details, boot-block lockout behavior, DC/AC timing specs, and industrial-grade supply chain support for long-lifecycle designs.
Technical Context
The AT49F002N-55PI implements a sector-erase Flash architecture with one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K + 128K bytes). Its command-set-driven operation uses standard CE/OE/WE controls and supports software-based chip/sector erase and byte programming without high-voltage inputs.
It features DATA polling (I/O7 complement) and toggle-bit (I/O6) methods for end-of-program/erase detection, VCC sense (<3.8V inhibit), noise filtering (<15 ns pulse rejection), and RESET-triggered boot-block override at 12V - though RESET is DC on this variant per datasheet note.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - fits full bootloader + configuration + application code in single device |
| Read Access Time | 55 ns max - enables direct execution from Flash (XIP) in 20 MHz microcontrollers without wait states |
| Byte Programming Time | 10 µs typical - allows rapid field updates of small configuration tables or calibration data |
| Erase Cycle Time | 10 seconds max for full chip - deterministic timing simplifies host firmware timeout handling |
| Endurance | 10,000 program/erase cycles - validated for industrial logging, parameter tuning, and firmware patching |
| Power Dissipation | 50 mA active / 100 µA CMOS standby - suitable for low-power remote sensors and battery-backed systems |
| Operating Range | -40°C to +85°C industrial grade - qualified for factory automation, motor drives, and outdoor metering |
Pinout & Package
AT49F002N-55PI is supplied in a 32-pin PDIP (Plastic Dual Inline Package, 0.600" wide, package code 32P6). Pin 1 is index-marked; pin 9 is NC (Don't Connect) per datasheet Section 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 used for sector selection in command sequences |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; inhibits programming when high |
| OE | Output Enable | Active-low output gate; controls data bus tristate; must be high during programming/erase to prevent bus contention |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing; inhibits program if held high |
| I/O0–I/O7 | Data Bus | Bidirectional 8-bit data interface; I/O7 used for DATA polling, I/O6 for toggle-bit status indication |
| RESET | Reset Input | DC (Don't Connect) on AT49F002N-55PI - not functional; pin 9 left unconnected per ordering table and Section 2 note |
| VCC | Power Supply | +5V ±10% supply; internal VCC sense disables programming below ~3.8V for robustness |
| GND | Ground | Reference for all I/O and power pins; requires low-impedance connection to minimize noise during erase/program |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent 16K boot block (00000H–03FFFH) with programmable lockout prevents accidental overwrite of critical startup code |
| Hardware Data Protection | VCC sense, WE/CE/OE logic interlock, and 15 ns noise filter eliminate spurious writes in electrically noisy industrial environments |
| Boot Block Lockout Override | Not applicable - RESET pin is DC on AT49F002N-55PI; boot block lockout is permanent once enabled |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 (complement read) or I/O6 (toggle) eliminates need for fixed delay timers in host firmware |
| Single 5V Operation | No external 12V or VPP required - simplifies power design and enables direct interface with 5V microcontrollers and FPGAs |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory floors. IC Role / Device Role / Timing Role: Nonvolatile code storage with 55 ns read access enabling real-time scan-cycle execution; sector erase isolates firmware updates from runtime data. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; 100 µA standby current extends uptime during maintenance mode. |
Use Scenario: Retaining calibrated sensor offsets, patient safety thresholds, and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block (8K × 2) stores user-configurable settings; byte programming allows per-patient calibration without full reflash. Use Value: Hardware data protection prevents corruption during ESD events; industrial temperature range (-40°C to +85°C) supports sterilization cycles. |
| Automotive Body Control Module | Networking Equipment Bootloader |
Use Scenario: Holding window/mirror/seat position presets and CAN node configuration in automotive body control units. IC Role / Device Role / Timing Role: Main memory blocks store feature-code variants; sector erase enables OTA updates to specific subsystems only. Use Value: 10-second erase time aligns with vehicle ignition-off diagnostics; 5V-only operation matches legacy automotive MCU voltage rails. |
Use Scenario: Hosting secure bootloader and cryptographic keys in enterprise switches and routers requiring firmware authentication. IC Role / Device Role / Timing Role: Boot block (16K) stores immutable root-of-trust code; lockout prevents tampering during field deployment. Use Value: Permanent lockout after enablement meets IEC 62443 requirements; DATA polling enables deterministic secure boot timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-55-4C-NHE | 3.3V core (5V tolerant I/O), 55 ns access, 100K endurance, no boot-block lockout | Lacks hardware-protected boot sector; requires level-shifting in pure 5V systems | Choose for lower active power (18 mA) and compatibility with mixed-voltage designs where boot security is managed externally |
| MX29LV020TC-55G | 3.3V supply only, 55 ns access, 100K endurance, top/bottom boot-block options | Requires 3.3V regulator; boot-block address configurable but lacks 12V override capability | Prefer for new 3.3V designs needing higher endurance and flexible boot-sector placement; not drop-in for 5V-only boards |
Compared with SST39VF020-55-4C-NHE and MX29LV020TC-55G, the AT49F002N-55PI provides guaranteed 5V-only operation, permanent boot-block lockout without external logic, and industrial temperature qualification - making it optimal for legacy 5V embedded systems requiring field-upgradable firmware with hardware-enforced security.
Availability
AT49F002N-55PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply over 10+ year product lifecycles.
Supply support for AT49F002N-55PI 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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products including the AT49F002 series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial and automotive markets.
The AT49F002N-55PI belongs to Atmel's early-generation 5V Flash memory product line, designed specifically for in-system reprogrammability in cost-sensitive, reliability-critical embedded systems where external high-voltage programming is impractical.
FAQ
What is the function of the RESET pin on AT49F002N-55PI?
The RESET pin on AT49F002N-55PI is designated as "DC" (Don't Connect) per the datasheet's Pin Configurations section and Ordering Information table. It is not functional and must remain unconnected in PCB layout. This differs from the AT49F002T variant, where RESET supports 12V boot-block override - a capability absent in the AT49F002N-55PI.
Does AT49F002N-55PI support true 5V-only programming without external high voltage?
Yes, AT49F002N-55PI performs all operations - read, byte programming, and sector/chip erase - using only a 5V ±10% supply. No external 12V or VPP is required. Programming is initiated via six-byte command sequences written to specific addresses (e.g., 5555H, 2AAAH), and internal circuitry generates necessary pump voltages.
How is boot block protection implemented in AT49F002N-55PI?
AT49F002N-55PI implements boot block lockout via a six-byte command sequence that permanently disables programming and erasure of the 16K-byte boot sector (00000H–03FFFH). Once enabled, the lockout cannot be reversed under 5.5V; the RESET pin is DC, so 12V override is unavailable. Status is readable at address 00002H via software identification mode.
What package type and pin count does AT49F002N-55PI use?
AT49F002N-55PI uses a 32-pin Plastic Dual Inline Package (PDIP), 0.600" wide, with package code 32P6. Pin 1 is index-marked; pin 9 is NC (Don't Connect) as confirmed in the "AT49F002N Ordering Information" table and Section 2 of the datasheet. Lead finish is matte tin, RoHS-compliant.
Can AT49F002N-55PI be used in place of AT49F002-55PI?
No - AT49F002N-55PI and AT49F002-55PI are distinct devices. The "N" suffix denotes the absence of RESET functionality (DC pin), while the base AT49F002-55PI includes a functional RESET pin. Pin 9 is NC in AT49F002N-55PI but active in AT49F002-55PI, making them incompatible without PCB revision.
AT49F002N-55PI 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:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F002N-55PI FAQ
1.How can I place an order for AT49F002N-55PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002N-55PI 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 AT49F002N-55PI reliable?
The price and inventory of AT49F002N-55PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002N-55PI is usually 5 days.
3.What payment methods are accepted for AT49F002N-55PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002N-55PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002N-55PI?
AT49F002N-55PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002N-55PI 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 AT49F002N-55PI?
For technical support, including AT49F002N-55PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002N-55PI requirements.
6.How does Aetrix verify that AT49F002N-55PI is sourced from the original manufacturer or authorized distributors?
All AT49F002N-55PI 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 AT49F002N-55PI meets industry standards.
7.What is the process for return or replacement of AT49F002N-55PI?
All AT49F002N-55PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002N-55PI, 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 AT49F002N-55PI part is unused and in its original packaging.
Return procedure for AT49F002N-55PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002N-55PI Tags
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