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Microchip Technology AT49BV002T-12JC
- Part No.:
- AT49BV002T-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002T-12JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,932
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Product details
Overview
AT49BV002T-12JC from Microchip Technology (formerly Atmel) is a 2-Mbit (256K × 8) single-supply 3V Flash memory IC designed for in-system reprogrammability in embedded boot code storage. It features 70 ns read access time, 10-second chip erase, byte-programming at 30 µs/byte typical, and hardware data protection. It is used in microcontroller-based systems requiring secure, field-upgradable firmware storage with boot block lockout.
For engineers reviewing the AT49BV002T-12JC datasheet, AT49BV002T-12JC pinout, AT49BV002T-12JC application, or AT49BV002T-12JC equivalent, key selection criteria include its 120 ns access timing grade, PLCC-32 package, boot block address range (3C000H–3FFFFH), sector-erasable architecture, and 2.7–3.6 V operation - all critical for legacy industrial controller and telecom equipment designs.
Technical Context
The AT49BV002T-12JC implements a standard parallel Flash interface with CE/OE/WE control logic and supports EPROM-like read operations. Its internal command register executes software-controlled erase and program cycles without external high-voltage programming signals.
It uses a sector-based memory map: one 16K-byte boot block (3C000H–3FFFFH), two 8K-byte parameter blocks (3A000H–3BFFFH and 38000H–39FFFH), and two main memory blocks (20000H–37FFFH and 00000H–1FFFFH). Boot block lockout is enabled via a six-cycle command sequence and can be overridden only by applying 12 V to RESET during programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), sufficient for compact boot loaders and configuration tables |
| Read Access Time | 120 ns max - defines minimum bus cycle timing for 8-bit microprocessor interfaces |
| Supply Voltage | 2.7–3.6 V - enables direct connection to 3.3 V logic rails without level shifting |
| Active Current | 25 mA - determines power budget impact during firmware reads or updates |
| Standby Current | 50 µA CMOS - supports low-power sleep modes in battery-backed systems |
| Erase Cycle Time | 10 seconds typical - sets minimum latency for field firmware patching |
| Endurance | 10,000 write/erase cycles - qualifies for infrequent but mission-critical updates |
Pinout & Package
AT49BV002T-12JC is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads, suitable for socketed or surface-mount applications requiring mechanical robustness and thermal cycling resilience.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing (00000H–3FFFFH) |
| I/O0–I/O7 | Data Input/Output | 8-bit bidirectional data path compatible with standard microprocessor data buses |
| CE | Chip Enable | Active-low chip select; enables device for read/write when low and OE/WE configured |
| OE | Output Enable | Active-low output gate; controls data bus drive to prevent contention during shared-bus operation |
| 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 override enables boot block reprogramming |
| VCC | Power Supply | +2.7 to +3.6 V supply; powers core logic and I/O buffers |
| GND | Ground | Reference return path for all digital and analog circuitry |
| DC | No Connect | Pin 1 on PLCC package - must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte region (3C000H–3FFFFH) permanently protected after command activation - ensures bootloader integrity |
| DATA Polling & Toggle Bit | Real-time end-of-program detection via I/O7 complement or I/O6 toggling - eliminates need for fixed delay timers in firmware |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibit logic prevent accidental writes during power transients |
| Sector Erase Flexibility | Independent erasure of parameter blocks (8K each) and main memory blocks (96K/128K) - enables modular firmware updates without full chip erase |
| Single 3V Supply Operation | No external 5V or 12V required for programming - simplifies power design and reduces BOM count |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot Code |
|---|---|
Use Scenario: Storing boot firmware and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing fast 120 ns read access to initialize ARM Cortex-M3/M4 processors at power-on. Use Value: Boot block lockout prevents corruption of startup code during field firmware upgrades, ensuring deterministic system recovery. | Use Scenario: Holding initialization code and DSP configuration data on carrier-grade line cards operating in central office environments. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to TI C6000 DSPs via EMIF, delivering reliable code fetch under extended temperature (-40°C to +85°C). Use Value: Sector-erasable architecture allows independent update of protocol stacks without disturbing baseband firmware, reducing service downtime. |
| Medical Diagnostic Equipment BIOS | Legacy Automotive ECU Calibration Storage |
Use Scenario: Storing safety-critical boot images and calibration lookup tables in FDA-regulated imaging devices with long product lifecycles. IC Role / Device Role / Timing Role: Secure, field-reprogrammable memory with verified 10,000-cycle endurance for regulatory-compliant firmware revisions. Use Value: 12 V RESET override enables authorized reprogramming of locked boot sectors during certified service procedures. | Use Scenario: Retaining engine calibration maps and diagnostic routines in Tier-1 automotive ECUs where obsolescence management is critical. IC Role / Device Role / Timing Role: Pin-compatible replacement for older 27C020 EPROMs in CAN-based engine control modules using 8-bit microcontrollers. Use Value: 2.7–3.6 V operation eliminates need for 5V regulators, while PLCC-32 package ensures compatibility with existing PCB footprints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV002T-12JI | Same die and timing, but industrial-grade (-40°C to +85°C) temperature rating and PDIP-32 package | Preferred for non-socketed, through-hole production where thermal margin exceeds commercial spec | Select when board-level reliability under extended temperature stress is required and PLCC socketing is not needed |
| SST39VF020-120-4C-NHE | 2 Mbit Flash with 120 ns access, but uses different command set, lacks RESET-based boot override, and has no DC pin | Requires firmware driver modification; no hardware boot lockout override capability | Choose only if migrating from SST39VF family; verify command compatibility and absence of 12 V RESET dependency |
Compared with AT49BV002T-12JI, the AT49BV002T-12JC offers socketed PLCC-32 for prototyping and field service, while SST39VF020-120-4C-NHE trades boot security features for broader vendor support - making AT49BV002T-12JC optimal for legacy Atmel-based designs requiring field-reprogrammable boot integrity.
Availability
AT49BV002T-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card boot code, and medical diagnostic equipment BIOS requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002T-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
Microchip Technology acquired Atmel in 2016 and maintains legacy Flash memory product lines with full datasheet, qualification, and support continuity.
The AT49BV series was designed specifically for cost-sensitive, socketed embedded systems needing field-upgradable boot code with hardware-enforced write protection - targeting industrial control, telecom infrastructure, and medical instrumentation.
FAQ
What is the boot block address range for AT49BV002T-12JC?
The boot block for AT49BV002T-12JC occupies addresses 3C000H to 3FFFFH (16K bytes). This differs from the base AT49BV002(N) variant, which locates the boot block at 00000H–03FFFH. The relocated boot sector enables flexible memory mapping for newer system architectures requiring top-of-memory initialization code.
Does AT49BV002T-12JC support 5V-only programming commands?
No, AT49BV002T-12JC does not require 5V-only programming commands. It operates exclusively from a single 2.7–3.6 V supply and uses standard TTL-level CE/OE/WE control signals. All programming and erase functions are initiated via software command sequences written to specific address/data locations - eliminating need for external high-voltage generators.
Can the boot block lockout on AT49BV002T-12JC be disabled after activation?
No, the boot block lockout feature on AT49BV002T-12JC cannot be disabled once enabled. However, it can be temporarily overridden during programming or erase operations by applying 12.0 V ± 0.5 V to the RESET pin. After the operation completes and RESET returns to TTL levels, the lockout resumes - preserving long-term security.
What package type is used for AT49BV002T-12JC?
AT49BV002T-12JC uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads (package code 32J). This surface-mount package supports socketed deployment for development and field service, and provides superior thermal and mechanical reliability compared to PDIP in vibration-prone environments.
How is end-of-program detection implemented in AT49BV002T-12JC?
AT49BV002T-12JC supports two hardware-assisted end-of-program detection methods: DATA polling (I/O7 returns complement of programmed data until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during active programming). Both methods allow firmware to poll asynchronously without fixed delays, improving update efficiency and determinism.
AT49BV002T-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:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV002T-12JC FAQ
1.How can I place an order for AT49BV002T-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002T-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 AT49BV002T-12JC reliable?
The price and inventory of AT49BV002T-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002T-12JC is usually 5 days.
3.What payment methods are accepted for AT49BV002T-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002T-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002T-12JC?
AT49BV002T-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002T-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 AT49BV002T-12JC?
For technical support, including AT49BV002T-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002T-12JC requirements.
6.How does Aetrix verify that AT49BV002T-12JC is sourced from the original manufacturer or authorized distributors?
All AT49BV002T-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 AT49BV002T-12JC meets industry standards.
7.What is the process for return or replacement of AT49BV002T-12JC?
All AT49BV002T-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002T-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 AT49BV002T-12JC part is unused and in its original packaging.
Return procedure for AT49BV002T-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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