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Microchip Technology AT49LV002T-12JC
- Part No.:
- AT49LV002T-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LV002T-12JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,604
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Product details
Overview
AT49LV002T-12JC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 3.0–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code/data storage in embedded microcontroller systems. It delivers 120 ns read access time, 10 s chip erase time, 30 µs/byte programming, 10,000 write cycles, and sector-based architecture with boot block protection - deployed in industrial control firmware updates and BIOS storage.
For engineers reviewing the AT49LV002T-12JC datasheet, AT49LV002T-12JC pinout, AT49LV002T-12JC application, or AT49LV002T-12JC equivalent, key selection criteria include boot-sector lockout override via 12 V RESET, DATA polling/Toggle Bit end-of-write detection, sector-erase granularity (16K/8K/96K/128K blocks), and PLCC-32 package compatibility with legacy 5 V system interfaces.
Technical Context
The AT49LV002T-12JC implements a standard parallel Flash interface with CE/OE/WE control logic and supports hardware reset-driven boot-block reprogramming at 12 V. Its internal command register executes six-cycle sequences for chip/sector erase and byte programming without external high-voltage circuitry.
Memory organization is fixed: 16K-byte boot block (3C000–3FFFFH), two 8K-byte parameter blocks (3A000–3BFFFH, 38000–39FFFH), and two main memory blocks (20000–37FFFH and 00000–1FFFFH). Boot block lockout is software-enabled and reversible only via 12 V RESET - a feature absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), enabling full firmware images for 8-bit MCUs without external banking logic |
| Read Access Time | 120 ns - meets timing requirements for 8 MHz Z80/8051 bus cycles with no wait states |
| Byte Programming Time | 30 µs typical - allows real-time field updates of configuration parameters without system freeze |
| Erase Cycle Time | 10 seconds max for full chip - supports batch reprogramming in production test fixtures |
| Write End 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 (3C000–3FFFFH) with lockout enable/disable via 12 V RESET - secures bootloader integrity while permitting runtime parameter updates |
| Supply Voltage Range | 3.0–3.6 V - compatible with regulated 3.3 V rails; excludes 2.7 V operation unlike BV-grade variants |
Pinout & Package
AT49LV002T-12JC uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package with J-leads, suitable for socketed or surface-mount applications requiring mechanical robustness and thermal cycling resilience in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A17 enables access to upper 128K block (20000–3FFFFH) |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; latched on WE/CE rising edge during programming, tri-stated when CE or OE high |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; inhibits programming if held high |
| OE | Output Enable | Active-low output gate; controls data bus drive; high-Z state prevents bus contention during multi-device sharing |
| WE | Write Enable | Active-low write strobe; initiates command latching on falling edge and data capture on rising edge |
| RESET | Hardware Reset Input | Logic-high = normal operation; low = high-Z outputs; 12 V pulse overrides boot block lockout - not available on N-suffix parts |
| VCC | Power Supply | +3.0 to +3.6 V supply; powers core logic and I/O buffers; requires local 0.1 µF decoupling |
| GND | Ground Reference | Signal and power return; must be low-inductance connection to minimize noise coupling during erase/write transitions |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables secure bootloader storage (3C000–3FFFFH) while allowing independent update of parameter and application sectors |
| 12 V RESET Override | Permits reprogramming of locked boot sector without device replacement - critical for field recovery of corrupted firmware |
| DATA Polling & Toggle Bit | Eliminates fixed-timing loops in host firmware; allows immediate initiation of next read/program cycle upon completion detection |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock prevent accidental writes |
| Low Power Standby | 50 µA CMOS standby current enables battery-backed operation in always-on monitoring systems |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware and calibration tables in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; 120 ns read access supports deterministic scan-cycle execution. Use Value: Boot block lockout prevents accidental overwrite of safety-critical startup routines while permitting runtime updates to I/O mapping tables. |
Use Scenario: Retaining user-configurable therapy parameters and device serialization data in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Parameter EEPROM replacement; 30 µs/byte programming enables fast save-on-exit without interrupting clinical operation. Use Value: 50 µA standby current extends battery life; DATA polling ensures reliable parameter commit before power-down. |
| Automotive ECU Bootloader | Networking Equipment BIOS Storage |
Use Scenario: Hosting secure bootloader code in engine control units where firmware integrity is mandated by ISO 26262 ASIL-B requirements. IC Role / Device Role / Timing Role: Protected boot memory with 12 V RESET override for emergency recovery; operates across -40°C to +85°C industrial range. Use Value: Hardware-enforced boot block lockout prevents malicious or erroneous corruption; sector erase isolates bootloader from application updates. |
Use Scenario: Storing BIOS and FPGA configuration bitstreams in enterprise switches requiring field-upgradable firmware without hardware intervention. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to ARM Cortex-A host; 25 mA active current supports burst-mode flash programming. Use Value: Full chip erase in ≤10 s enables rapid firmware rollback; PLCC-32 package allows socketed replacement during service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-120-4C-NHE | 3.3 V-only, 2 Mbit, 120 ns access, PLCC-32; lacks 12 V RESET override and boot block lockout override | No hardware-recoverable boot sector - requires full chip erase to restore bootloader if corrupted | Select when boot security is managed entirely in software and 12 V recovery is unnecessary |
| MX29LV002CTTI-12G | 3.0–3.6 V, 2 Mbit, 120 ns, PLCC-32; includes boot block protection but no 12 V RESET override capability | Boot block lockout is permanent once enabled - no field recovery path for failed updates | Choose for cost-sensitive designs where bootloader corruption risk is mitigated by rigorous pre-deployment validation |
Compared with SST39VF020-120-4C-NHE and MX29LV002CTTI-12G, the AT49LV002T-12JC uniquely provides 12 V RESET-driven boot block reprogramming - enabling field recovery without device replacement or full chip erase, a critical advantage in unattended or remote deployments.
Availability
AT49LV002T-12JC is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device configuration retention, and automotive ECU bootloader applications requiring stable component supply, long-term lifecycle support, and legacy PLCC-32 footprint compatibility.
Supply support for AT49LV002T-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 full support for its legacy Flash memory portfolio, including manufacturing, documentation, and technical assistance.
The AT49LV002T-12JC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3 V embedded systems requiring in-system reprogrammability, sector-level erase flexibility, and hardware-enforced data integrity in mission-critical firmware storage.
FAQ
What is the boot block address range for AT49LV002T-12JC?
The boot block for AT49LV002T-12JC occupies addresses 3C000H to 3FFFFH (16 Kbytes), distinct from the base AT49LV002(N) which uses 00000H–03FFFH. This upper-address placement isolates boot code from main application memory and enables independent sector erase operations without affecting startup routines. The AT49LV002T-12JC datasheet confirms this mapping in the block diagram and command definitions section.
Does AT49LV002T-12JC support 2.7 V operation?
No, AT49LV002T-12JC is specified for 3.0 V to 3.6 V operation only - unlike the BV-grade AT49BV002T-12JC which supports 2.7–3.6 V. This is explicitly stated in the DC Operating Range table: "AT49LV002(N)(T)-12" lists VCC as "3.0V–3.6V". Operation below 3.0 V may result in unreliable read/write behavior or failure to enter command sequences.
How is boot block lockout overridden on AT49LV002T-12JC?
Boot block lockout on AT49LV002T-12JC is overridden by applying 12.0 V ± 0.5 V to the RESET pin during chip erase, sector erase, or byte programming - a feature absent in N-suffix variants. Once RESET returns to TTL levels, lockout reactivates. This mechanism is documented in the "Boot Block Programming Lockout Override" section and requires external 12 V generation circuitry.
What package type does AT49LV002T-12JC use?
AT49LV002T-12JC uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package, designated "32J" in Atmel's ordering information. Pin configurations match the standard PLCC top view with A0–A17, I/O0–I/O7, CE, OE, WE, RESET, VCC, and GND arranged per the provided PLCC diagram - confirmed in pages 4–5 of the datasheet.
Can AT49LV002T-12JC be programmed using standard 3.3 V signals only?
Yes, AT49LV002T-12JC performs all standard programming and erase operations using only 3.0–3.6 V signals - no external high-voltage generator is needed. The 12 V RESET override is strictly optional and used solely for boot block recovery; regular byte programming, sector erase, and chip erase execute fully at VCC levels, as verified in the "Device Operation" and "Command Definitions" sections.
AT49LV002T-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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49LV002T-12JC FAQ
1.How can I place an order for AT49LV002T-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002T-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 AT49LV002T-12JC reliable?
The price and inventory of AT49LV002T-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002T-12JC is usually 5 days.
3.What payment methods are accepted for AT49LV002T-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002T-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002T-12JC?
AT49LV002T-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002T-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 AT49LV002T-12JC?
For technical support, including AT49LV002T-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002T-12JC requirements.
6.How does Aetrix verify that AT49LV002T-12JC is sourced from the original manufacturer or authorized distributors?
All AT49LV002T-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 AT49LV002T-12JC meets industry standards.
7.What is the process for return or replacement of AT49LV002T-12JC?
All AT49LV002T-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002T-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 AT49LV002T-12JC part is unused and in its original packaging.
Return procedure for AT49LV002T-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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