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Microchip Technology AT49F002-12JC
- Part No.:
- AT49F002-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F002-12JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
AT49F002-12JC 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), and hardware data protection. It operates across commercial temperature range (0°C to 70°C) in a 32-lead PLCC package and is used for firmware storage and boot code retention in embedded controllers.
For engineers reviewing the AT49F002-12JC datasheet, AT49F002-12JC pinout, AT49F002-12JC application, or AT49F002-12JC equivalent, key selection considerations include its 120 ns read timing, boot block lockout capability, 10,000 write/erase cycle endurance, 50 mA active current, and compatibility with standard microprocessor bus interfaces using CE/OE/WE control.
Technical Context
The AT49F002-12JC implements a command-register-based programming model requiring six-byte sequences for chip/sector erase and boot lockout enable. Its internal program control logic eliminates need for external high-voltage generators, supporting 5V-only operation for both read and reprogramming.
It features dual erase methods-full chip erase (≤10 s) and sector-selective erase-and supports DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) for end-of-operation detection. The boot block (00000H–03FFFH) is programmable lockout-enabled via software command sequence and override-capable via 12V RESET input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - enables full BIOS/firmware image storage in single device. |
| Read Access Time | 120 ns - defines maximum clock rate for synchronous bus interface without wait states. |
| Byte Programming Time | 10 µs typical - determines minimum time between successive byte writes during field updates. |
| Erase Cycle Time | 10 seconds max - sets worst-case latency for sector or chip erase before reprogramming. |
| Write Endurance | 10,000 program/erase cycles - specifies guaranteed lifetime for firmware update cycles in deployed systems. |
| Power Dissipation | 275 mW typical at 55 ns (commercial temp) - constrains thermal design in dense PCB layouts. |
| Operating Voltage | 5 V ±10% - requires stable 5V rail; no auxiliary voltage rails needed for programming. |
Pinout & Package
AT49F002-12JC is housed in a 32-lead Plastic J-leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE, with 1.27 mm pitch, 18.5 × 18.5 mm body, and pin 1 index mark. Pin 1 is located at corner with diagonal chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 used for standard access, A17 selects upper half of memory map. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; latched on rising edge of WE/CE during programming, driven during read. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; inhibits programming if held high. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, preventing bus contention. |
| WE | Write Enable | Active-low write strobe; controls latching of address/data during programming; must be pulsed per command sequence timing. |
| RESET | Reset Input | Active-low reset; forces outputs to high-Z; 12V pulse enables boot block override - not available on N(T) variants. |
| VCC / GND | Power Supply | Single 5V supply (VCC) and ground (GND); CMOS standby current ≤100 µA ensures low-power sleep mode. |
| DC | No Connect | Pin 1 on DIP/PLCC and pin 9 on TSOP are unconnected - must be left floating or tied to ground per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16K-byte boot block (00000H–03FFFH) supports permanent secure code storage; lockout enabled via 6-byte command sequence. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filter (rejects <15 ns pulses), and control-line inhibition (OE low/CE high/WE high blocks writes). |
| End-of-Operation Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide real-time status without external timers or clocks. |
| 5V-Only Reprogrammability | Eliminates need for 12V programming supply; all commands executed using standard 5V logic levels and microprocessor write cycles. |
| CMOS Standby Current | ≤100 µA at VCC = 5V - enables low-power retention in battery-backed or energy-sensitive embedded applications. |
Applications
| Industrial PLC Firmware Storage | Embedded Controller Boot Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers subject to frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile program memory with sector-erase granularity; boot block retains startup loader while parameter blocks store user-configurable settings. Use Value: Enables safe in-system reprogramming without removing the device; 10,000-cycle endurance supports multi-year maintenance cycles. | Use Scenario: Holding boot code and initialization routines for microcontrollers in medical diagnostic equipment. IC Role / Device Role / Timing Role: Primary boot ROM accessed at power-on reset; 120 ns access time meets tight timing budgets for early-stage CPU fetches. Use Value: Boot block lockout prevents accidental corruption of critical startup code during firmware upgrades. |
| Telecom Line Card Configuration | Automotive ECU Calibration Storage |
Use Scenario: Storing DSP configuration tables and protocol stacks on telecom line interface cards operating in extended temperature environments. IC Role / Device Role / Timing Role: Parameter memory mapped into host processor address space; accessed via standard CE/OE/WE bus interface. Use Value: Two independent 8K-byte parameter blocks allow concurrent storage of active/inactive configuration sets for hot-swappable updates. | Use Scenario: Retaining engine calibration maps and sensor compensation coefficients in automotive engine control units. IC Role / Device Role / Timing Role: Field-updatable nonvolatile memory with hardware write protection; operates reliably across -40°C to +85°C industrial range. Use Value: 12V RESET override allows factory-level recalibration even after boot lockout activation - critical for service depot reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002N-12JC | Lacks RESET pin functionality; boot block lockout override via 12V is not supported. | Not suitable where field recalibration of protected boot code is required. | Select AT49F002N-12JC only if RESET pin is unused and boot block override is unnecessary. |
| AT49F002T-12JC | Boot block relocated to top of memory map (3C000H–3FFFFH); same pinout and timing. | Requires address remapping in host firmware; incompatible with legacy AT49F002(N) boot loaders. | Choose AT49F002T-12JC only when new designs require top-aligned boot sector for linker script compatibility. |
Compared with AT49F002N-12JC and AT49F002T-12JC, the AT49F002-12JC provides full RESET-based boot override and bottom-aligned boot block (00000H–03FFFH), making it the only variant supporting legacy boot code execution and service recalibration without hardware modification.
Availability
AT49F002-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded controller boot memory, and telecom line card configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002-12JC 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 security ICs for industrial, automotive, and consumer applications.
The AT49F002 family was designed as cost-optimized, 5V-only Flash memory for firmware and configuration storage in resource-constrained embedded systems requiring in-system reprogrammability and hardware data protection.
FAQ
What is the memory organization of the AT49F002-12JC?
The AT49F002-12JC 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 one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This structure is confirmed in the device's block diagram and sector address table.
Does the AT49F002-12JC support 12V programming voltage?
No, the AT49F002-12JC is a 5V-only device: both read and programming operations use a single 5V ±10% supply. However, a 12V ±0.5V pulse applied to the RESET pin enables boot block override - this is not programming voltage but a dedicated hardware unlock signal, distinct from conventional high-voltage programming schemes.
How does the boot block lockout feature work on the AT49F002-12JC?
The AT49F002-12JC boot block lockout is enabled by executing a six-byte command sequence (AAh, 55h, 80h, AAh, 55h, 40h) to address 5555h. Once activated, the 16K-byte boot block (00000H–03FFFH) becomes permanently write-protected at ≤5.5V. Protection can be overridden only by applying 12V to RESET - a capability unique to the base AT49F002 variant.
What package type is used for the AT49F002-12JC?
The AT49F002-12JC uses a 32-lead Plastic J-leaded Chip Carrier (PLCC) package, designated as 32J per Atmel's ordering information. Its dimensions are 18.5 × 18.5 mm with 1.27 mm lead pitch, and it complies with JEDEC standard MS-016 AE. Pin 1 is identified by a diagonal chamfer and index mark.
Can the AT49F002-12JC be used in industrial temperature applications?
The AT49F002-12JC is rated for commercial temperature range (0°C to 70°C) only. For industrial operation (-40°C to +85°C), the correct variant is AT49F002-12JI (same PLCC package, industrial grade). Using AT49F002-12JC outside its specified temperature range may result in timing violations, data retention loss, or premature wear-out.
AT49F002-12JC 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:
- 120 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)
AT49F002-12JC FAQ
1.How can I place an order for AT49F002-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002-12JC 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 AT49F002-12JC reliable?
The price and inventory of AT49F002-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002-12JC is usually 5 days.
3.What payment methods are accepted for AT49F002-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002-12JC?
AT49F002-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002-12JC 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 AT49F002-12JC?
For technical support, including AT49F002-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002-12JC requirements.
6.How does Aetrix verify that AT49F002-12JC is sourced from the original manufacturer or authorized distributors?
All AT49F002-12JC 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 AT49F002-12JC meets industry standards.
7.What is the process for return or replacement of AT49F002-12JC?
All AT49F002-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002-12JC, 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 AT49F002-12JC part is unused and in its original packaging.
Return procedure for AT49F002-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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