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Microchip Technology AT49LV002NT-12JC
- Part No.:
- AT49LV002NT-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LV002NT-12JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
AT49LV002NT-12JC from Microchip Technology (formerly Atmel) is a 2-Mbit (256K × 8) single-supply 3.0–3.6V in-system reprogrammable Flash memory with 120 ns read access time, sector-based architecture including a 16K-byte boot block with programmable lockout, and fast 10-second chip erase - used for firmware storage and boot code retention in embedded microcontroller systems.
For engineers reviewing the AT49LV002NT-12JC datasheet, AT49LV002NT-12JC pinout, AT49LV002NT-12JC application, or AT49LV002NT-12JC equivalent, key selection criteria include boot-sector write protection, PLCC-32 package compatibility, 120 ns timing compliance, and industrial temperature support (−40°C to +85°C).
Technical Context
The AT49LV002NT-12JC implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based byte programming and sector/chip erase. Its internal program control logic eliminates need for external high-voltage programming circuitry.
It features dual 8K-byte parameter blocks and two main memory blocks (96K and 128K bytes), with boot block address range 3C000H–3FFFFH. The RESET pin enables hardware reset and, when driven to 12 V, overrides boot lockout - though this override is not available on N(T) variants per documentation.
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 | 120 ns max - meets timing requirements for 8 MHz bus interfaces without wait states. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with 3.3 V system rails; no 5 V required for programming. |
| Program/Erase End Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - enables reliable software-controlled operation without fixed delay loops. |
| Endurance | 10,000 write/erase cycles - sufficient for field firmware updates over product lifetime. |
| Standby Current | 50 µA CMOS - enables low-power retention in battery-backed or energy-sensitive applications. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded deployment. |
Pinout & Package
AT49LV002NT-12JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package with 11.43 mm × 13.97 mm footprint and gull-wing leads. Pin 1 is index corner, and pin 9 is NC (No Connect) per datasheet Rev. 0982D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A17 required for top 128K region. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; true TTL-compatible I/O with VOH ≥ 2.4 V, VOL ≤ 0.45 V. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low hardware reset; high-impedance outputs when asserted; 12 V override disabled on NT variant. |
| VCC | Power Supply | 3.0–3.6 V supply; internal voltage regulation ensures stable core operation across rail variation. |
| GND | Ground | Reference return path for all signals and power; decoupling capacitor required near VCC pin. |
| DC | No Connect | Pin 9 - must be left unconnected; floating or tied to GND may cause undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (3C000H–3FFFFH) prevents accidental overwrite of boot code; enabled via 6-cycle command sequence. |
| Sector Erase Flexibility | Independent erase of two 8K parameter blocks and two main memory blocks (96K/128K) enables modular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and control-line inhibition (OE low/CE high/WE high blocks writes). |
| Byte-by-Byte Programming | 30 µs typical programming time per byte - allows fine-grained patching and runtime configuration storage. |
| Software Product Identification | Manufacturer code 1FH and device code 08H readable via 3-cycle software entry - enables automatic algorithm selection in programming tools. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Loader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing boot code and application firmware with 120 ns read access for deterministic startup timing. Use Value: Sector architecture enables field-upgradable firmware without erasing critical boot code; industrial temperature rating ensures reliability in harsh cabinet conditions. | Use Scenario: Holding certified boot loader and safety-critical initialization routines in Class II medical equipment requiring traceable firmware integrity. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced write protection on 16K boot block (3C000H–3FFFFH) to prevent unauthorized modification. Use Value: Boot lockout feature ensures regulatory-compliant firmware immutability; 10,000-cycle endurance supports long-term service life with periodic updates. |
| Automotive Diagnostic Module | Legacy Industrial HMI |
Use Scenario: Firmware storage in OBD-II diagnostic tools operating across extended ambient temperatures in vehicle service bays. IC Role / Device Role / Timing Role: In-system reprogrammable Flash supporting field updates via CAN-connected host; −40°C to +85°C operation matches automotive under-hood specs. Use Value: No high-voltage programming required - simplifies update infrastructure; DATA polling enables robust update verification without timeout assumptions. | Use Scenario: Replacement memory for aging human-machine interface panels using 8-bit microcontrollers with parallel address/data buses. IC Role / Device Role / Timing Role: Drop-in compatible 32-pin PLCC Flash replacing obsolete EPROMs; identical pinout and 120 ns timing meets legacy timing budgets. Use Value: Direct replacement for AT29C020/AM29F020 with enhanced endurance and lower standby current (50 µA vs. >100 µA). |
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 | 3.0–3.6 V, 2 Mbit, 120 ns, PLCC-32; lacks boot block lockout but offers faster 10 µs byte program time. | No hardware-protected boot sector; requires software-managed protection schemes. | Select when boot security is managed at firmware level and faster programming is prioritized. |
| MX29LV020TC-12V | 3.0–3.6 V, 2 Mbit, 120 ns, PLCC-32; includes boot block protection but uses different command set (AMD-style vs. Atmel). | Requires redesign of programming firmware due to incompatible command sequences and lockout enable flow. | Select only if existing toolchain supports AMD-compatible Flash; verify RESET pin behavior and sector map alignment. |
Compared with SST39VF020-120-4C-NHE and MX29LV020TC-12V, the AT49LV002NT-12JC provides unique boot-block lockout with explicit 12 V override capability (though disabled on NT), deterministic 10-second erase timing, and Atmel-specific command compatibility essential for legacy Atmel-based programming infrastructure.
Availability
AT49LV002NT-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot loader retention, and automotive diagnostic module updates requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49LV002NT-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 legacy Atmel Flash products including the AT49LV series.
The AT49LV002NT-12JC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in 3.3 V embedded systems where firmware integrity, sector-level flexibility, and industrial temperature operation are critical.
FAQ
What is the function of the RESET pin on the AT49LV002NT-12JC?
The RESET pin on the AT49LV002NT-12JC is an active-low hardware reset input that forces outputs into high-impedance state and halts ongoing operations. Unlike earlier BV/LV variants, the NT version does not support 12 V override of boot block lockout via RESET - this feature is explicitly disabled per datasheet Rev. 0982D. The AT49LV002NT-12JC RESET pin operates strictly as a TTL-level control signal.
Does the AT49LV002NT-12JC support in-system programming without external high voltage?
Yes, the AT49LV002NT-12JC supports full in-system programming using only its 3.0–3.6 V VCC supply - no external 12 V or 5 V programming voltage is required. All command sequences (byte program, sector erase, chip erase, lockout enable) use standard TTL-level inputs and internally generate necessary programming pulses. This capability is confirmed in the "Device Operation" section of the AT49LV002NT-12JC datasheet.
What is the memory organization and sector layout of the AT49LV002NT-12JC?
The AT49LV002NT-12JC organizes its 2 Mbit as 256K × 8, with sector architecture comprising one 16K-byte boot block (3C000H–3FFFFH), two 8K-byte parameter blocks (3A000H–3BFFFH and 38000H–39FFFH), and two main memory blocks (20000H–37FFFH = 96K, and 00000H–1FFFFH = 128K). This layout is specific to the (T) variant and differs from non-T versions which locate the boot block at 00000H–03FFFH.
Is the AT49LV002NT-12JC pin-compatible with the AT49LV002N-12JC?
No, the AT49LV002NT-12JC is not pin-compatible with the AT49LV002N-12JC. While both use PLCC-32 packaging, the NT variant includes a functional RESET pin (pin 1), whereas the N variant designates pin 1 as NC (No Connect). Additionally, the NT boot block resides at 3C000H–3FFFFH versus 00000H–03FFFH in the N variant - requiring address decoding changes. These differences make direct substitution unsafe without board-level validation.
How is boot block protection enabled and verified on the AT49LV002NT-12JC?
Boot block protection on the AT49LV002NT-12JC is enabled by executing a six-cycle command sequence (AAh → 55h → 80h → AAh → 55h → 40h) to address 5555h. Verification is performed in Software Product Identification mode: reading address 3C002H returns I/O0 = high if lockout is active. This behavior is documented in the "Boot Block Lockout Detection" section of the AT49LV002NT-12JC datasheet and applies exclusively to the (T) variant's boot block mapping.
AT49LV002NT-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)
AT49LV002NT-12JC FAQ
1.How can I place an order for AT49LV002NT-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002NT-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 AT49LV002NT-12JC reliable?
The price and inventory of AT49LV002NT-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002NT-12JC is usually 5 days.
3.What payment methods are accepted for AT49LV002NT-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002NT-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002NT-12JC?
AT49LV002NT-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002NT-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 AT49LV002NT-12JC?
For technical support, including AT49LV002NT-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002NT-12JC requirements.
6.How does Aetrix verify that AT49LV002NT-12JC is sourced from the original manufacturer or authorized distributors?
All AT49LV002NT-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 AT49LV002NT-12JC meets industry standards.
7.What is the process for return or replacement of AT49LV002NT-12JC?
All AT49LV002NT-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002NT-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 AT49LV002NT-12JC part is unused and in its original packaging.
Return procedure for AT49LV002NT-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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