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Microchip Technology AT49F002N-55JC
- Part No.:
- AT49F002N-55JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F002N-55JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,030
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Product details
Overview
AT49F002N-55JC from Atmel is a 2-Mbit (256K × 8) 5V-only Flash memory IC used for nonvolatile program/data storage in embedded microcontroller systems. It delivers 55 ns read access time, supports byte-by-byte programming (10 µs/byte typical), features sector-based erase architecture (16K-byte boot block with lockout, two 8K-byte parameter blocks, and two main memory blocks totaling 224K bytes), and operates across commercial temperature range (0°C to 70°C).
For engineers reviewing the AT49F002N-55JC datasheet, AT49F002N-55JC pinout, AT49F002N-55JC application, or AT49F002N-55JC equivalent, key selection considerations include its PLCC-32 package, 5V single-supply operation, hardware data protection (VCC sense, noise filtering), DATA polling/toggle bit for program/erase status detection, and boot block reprogramming lockout with 12V RESET override capability.
Technical Context
The AT49F002N-55JC implements a command-register-based architecture requiring six-byte sequences for chip/sector erase and boot lockout enable, with internal timing eliminating external clocks. Its sector architecture separates boot code (00000H–03FFFH) from configurable parameter and main memory blocks, enabling secure firmware updates without risking bootloader corruption.
Operation relies on standard EPROM-like control signals (CE/OE/WE), with RESET providing high-impedance output control and 12V override for boot block reprogramming. Hardware protection includes VCC sense (<3.8V inhibits programming), CE/OE/WE logic-level inhibition, and 15 ns noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - supports full firmware image storage for 8-bit microcontrollers. |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in timing-critical embedded applications. |
| Byte Programming Time | 10 µs typical - allows rapid field updates of configuration parameters or calibration data. |
| Erase Cycle Time | 10 seconds max - supports in-system reprogramming without external erasers or UV exposure. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and toggle bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Power Dissipation | 50 mA active / 100 µA CMOS standby - suitable for low-power battery-backed systems and industrial controllers. |
| Endurance | 10,000 write/erase cycles - validated for long-term use in programmable logic controllers and instrumentation. |
Pinout & Package
AT49F002N-55JC uses a 32-lead Plastic J-leaded Chip Carrier (PLCC) package with 1.27 mm pitch, 18.5 × 18.5 mm body, and pin 1 index mark. Pin 1 is DC (don't connect) per datasheet specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A16/A17 used for sector selection in command sequences. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; latches address/data during command entry. |
| OE | Output Enable | Active-low output control; enables I/O0–I/O7 drivers during read; held high during programming/erase to prevent bus contention. |
| WE | Write Enable | Active-low write strobe; controls data latching and initiates command cycles; filtered against <15 ns noise pulses. |
| RESET | Reset Input | Active-low reset halts operations and forces outputs to high-Z; 12V input overrides boot block lockout (not available on AT49F002N(T)). |
| I/O0–I/O7 | Data I/O Bus | Bi-directional 8-bit data path; carries command codes, addresses, and data; supports DATA polling on I/O7 and toggle bit on I/O6. |
| VCC | Power Supply | +5V ±10% supply; VCC sense circuit disables programming if voltage drops below 3.8V. |
| GND | Ground | Reference for all digital and analog functions; decoupling required within 10 mm of VCC pin. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for +12V programming voltage or charge pumps, simplifying power design and reducing BOM cost. |
| Boot block programming lockout | 16K-byte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code during field updates. |
| Hardware data protection | VCC sense, noise filtering, and CE/OE/WE logic interlock prevent spurious writes during power transients or EMI events. |
| Sector erase architecture | Independent erasure of parameter blocks (8K each) and main memory blocks (96K/128K) enables granular firmware updates without full chip erase. |
| 12V RESET override | Allows recovery of locked boot block via 12V ±0.5V pulse on RESET pin - critical for field repair of corrupted bootloader. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic programs and I/O mapping tables in programmable logic controllers with periodic field updates via serial interface. IC Role / Device Role / Timing Role: Nonvolatile program memory providing XIP-capable 55 ns read access for real-time scan cycle execution. Use Value: Boot block lockout ensures bootloader integrity during remote firmware upgrades, preventing system brickage. |
Use Scenario: Retaining calibrated sensor offsets, patient-specific therapy parameters, and audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage with byte-level write capability and 10,000-cycle endurance for frequent recalibration events. Use Value: Hardware data protection (VCC sense, noise filtering) guarantees write reliability in electrically noisy clinical environments. |
| Automotive Body Control Module | Networking Equipment Bootloader |
Use Scenario: Holding vehicle-specific configuration data (e.g., door lock behavior, lighting profiles) updated during dealership service procedures. IC Role / Device Role / Timing Role: Reprogrammable configuration memory operating across -40°C to +85°C (industrial-grade variants). Use Value: Sector erase enables updating parameter blocks without disturbing main firmware, reducing service time and risk. |
Use Scenario: Storing secure bootloader code that validates signed firmware images before execution in enterprise switches/routers. IC Role / Device Role / Timing Role: Secure boot memory with 12V RESET override for emergency recovery of corrupted bootloader. Use Value: Boot block lockout prevents malicious overwrite while allowing authorized recovery - meeting IEC 62443 security requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002N-55PC | DIP-32 package instead of PLCC-32; identical electrical specs and command set. | Suitable for through-hole prototyping or legacy board designs requiring DIP footprint. | Select when manual soldering, socket-based development, or compatibility with existing DIP layouts is required. |
| AT49F002N-55TC | TSOP-32 (8×20 mm) package; same 55 ns speed grade and 2-Mbit density. | Preferred for space-constrained PCBs in networking or consumer electronics where surface-mount density matters. | Choose for automated SMT assembly and reduced board area; verify thermal pad layout matches JEDEC MO-153. |
Compared with AT49F002N-55PC and AT49F002N-55TC, the AT49F002N-55JC offers superior thermal dissipation and mechanical robustness in PLCC packaging for industrial vibration-prone environments, while maintaining identical functional behavior and timing.
Availability
AT49F002N-55JC 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, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AT49F002N-55JC 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, nonvolatile memory, and secure authentication devices.
The AT49F002N series belongs to Atmel's 5V Flash memory product line, designed specifically for in-system reprogrammability in embedded systems requiring secure, reliable, and field-upgradable nonvolatile storage.
FAQ
What is the memory organization of the AT49F002N-55JC?
The AT49F002N-55JC contains 2 Mbit (262,144 × 8) of Flash memory organized as 256K words × 8 bits. Its physical address space spans 00000H to 3FFFFH, partitioned into a 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This structure enables secure bootloader storage and flexible firmware updates.
Does the AT49F002N-55JC support in-system programming without high-voltage supplies?
Yes, the AT49F002N-55JC supports full in-system reprogramming using only a 5V supply. It requires no external high-voltage programming source: all commands-including byte programming, sector erase, and chip erase-are executed via software-controlled sequences on the standard CE/OE/WE interface with 5V logic levels.
How does the boot block programming lockout work on the AT49F002N-55JC?
The AT49F002N-55JC implements a boot block lockout feature that, once enabled via a six-command sequence, permanently protects the 16K-byte boot block (00000H–03FFFH) from erase or program operations at ≤5.5V. Recovery requires applying 12V ±0.5V to the RESET pin - a capability confirmed for the AT49F002N variant but not available on AT49F002N(T).
What methods are available to detect completion of programming or erase cycles on the AT49F002N-55JC?
The AT49F002N-55JC provides two hardware-supported methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and toggle bit detection (I/O6 toggles between 0 and 1 during operation and stabilizes upon completion). Both eliminate reliance on fixed timeout delays in host firmware.
Is the AT49F002N-55JC compatible with standard EPROM read protocols?
Yes, the AT49F002N-55JC is fully compatible with standard EPROM read protocols: it asserts data on I/O0–I/O7 when CE and OE are low and WE is high, places outputs in high-impedance state when CE or OE is high, and supports standard microprocessor bus timing - enabling drop-in replacement in existing EPROM-based designs.
AT49F002N-55JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49F002N-55JC FAQ
1.How can I place an order for AT49F002N-55JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002N-55JC 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-55JC reliable?
The price and inventory of AT49F002N-55JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002N-55JC is usually 5 days.
3.What payment methods are accepted for AT49F002N-55JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002N-55JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002N-55JC?
AT49F002N-55JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002N-55JC 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-55JC?
For technical support, including AT49F002N-55JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002N-55JC requirements.
6.How does Aetrix verify that AT49F002N-55JC is sourced from the original manufacturer or authorized distributors?
All AT49F002N-55JC 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-55JC meets industry standards.
7.What is the process for return or replacement of AT49F002N-55JC?
All AT49F002N-55JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002N-55JC, 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-55JC part is unused and in its original packaging.
Return procedure for AT49F002N-55JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002N-55JC Tags
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