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Microchip Technology AT49LV002-12VI
- Part No.:
- AT49LV002-12VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV002-12VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,598
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Product details
Overview
AT49LV002-12VI 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 and data storage in embedded microcontroller systems. It delivers 70 ns read access time, 10-second chip erase, byte-programmable operation (30 µs/byte typical), and hardware data protection - enabling secure boot code retention in industrial control firmware updates.
For engineers reviewing the AT49LV002-12VI datasheet, AT49LV002-12VI pinout, AT49LV002-12VI application, or AT49LV002-12VI equivalent, key selection criteria include its 32-pin PLCC package, boot block lockout capability, sector-based erase architecture (16K boot + two 8K parameter + two main memory blocks), and compatibility with standard 5V-command protocols despite 3V-only operation.
Technical Context
The AT49LV002-12VI implements a command-register-based programming interface using standard microprocessor timing with CE/OE/WE control lines. Its internal program logic supports software-controlled chip erase, sector erase, byte programming, and boot block lockout activation via six-cycle command sequences written to fixed address locations (e.g., 5555H/2AAAH).
It features dual data-valid detection methods - DATA polling (I/O7 complement toggle) and Toggle Bit (I/O6 toggling) - for end-of-program/erase cycle confirmation without external timing dependencies. The device operates across –40°C to +85°C industrial temperature range and integrates VCC sense, noise filtering, and input-level inhibition to prevent inadvertent writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K bytes for direct byte-addressable firmware storage |
| Read Access Time | 120 ns max - defines worst-case instruction fetch latency in 8-bit microcontroller boot paths |
| Supply Voltage Range | 3.0 V to 3.6 V - compatible with regulated 3.3 V system rails; no 5 V required for command execution |
| Erase Cycle Time | 10 seconds typical - enables full-chip or sector-level field firmware updates within deterministic time budgets |
| Byte Programming Time | 30 µs typical - supports incremental configuration updates without blocking system operation for extended periods |
| Endurance | 10,000 write/erase cycles - validated lifetime for industrial firmware revision management over product lifecycle |
| Standby Current | 50 µA CMOS - ensures ultra-low power retention during MCU sleep modes in battery-backed systems |
Pinout & Package
AT49LV002-12VI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads, pin-compatible with industry-standard 32-pin PLCC footprints. Pin 1 is marked by corner notch; pin numbering follows counter-clockwise sequence starting from top-left corner when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-byte addressing; A0–A15 used for byte selection, A16–A17 for block selection in sector operations |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables bus contention avoidance |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, allowing shared data bus operation |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing; inhibits programming if held high |
| I/O0–I/O7 | Data Input/Output | Bidirectional 8-bit data bus; carries command codes, program data, and read outputs; supports DATA polling on I/O7 and Toggle Bit on I/O6 |
| VCC | Power Supply | +3.0 V to +3.6 V supply; powers core logic and I/O buffers; requires local decoupling per high-speed Flash layout guidelines |
| GND | Ground | Reference return path for all signals and power; must be low-inductance connection to minimize read/write noise coupling |
| RESET* | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V override enables boot block reprogramming when lockout is active |
| DC | No Connect | Pin 1 on PLCC package is unconnected; must remain floating - not tied to VCC, GND, or any signal |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code; enabled via 6-cycle command sequence |
| Sector Architecture | Four independently erasable sectors: one 16 KB boot block, two 8 KB parameter blocks, and two main memory blocks (96 KB + 128 KB) |
| Hardware Data Protection | VCC sense (<1.8 V disables programming), noise filter (<15 ns pulse rejection), and multi-input inhibit (OE low/CE high/WE high blocks writes) |
| DATA Polling & Toggle Bit | Real-time program/erase completion detection without timers: I/O7 complement toggle or I/O6 state toggle confirms operation finish |
| In-System Reprogrammability | Standard 5 V command protocol executed at 3 V supply - eliminates need for external VPP programming voltage or dedicated programmers |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O mapping tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed 10,000-cycle endurance and –40°C to +85°C operation; boot block lockout secures startup routines. Use Value: Enables safe remote firmware patches without risking bootloader corruption; 120 ns read time meets real-time scan cycle deadlines. | Use Scenario: Holding certified bootloader and calibration data in FDA-regulated diagnostic equipment requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: Secure, write-protected boot memory with hardware-level protection against spurious writes during ESD events or power transients. Use Value: Prevents unauthorized or accidental modification of safety-critical startup code; 50 µA standby current extends battery life in portable units. |
| Automotive Body Control Module | Networking Equipment Configuration Storage |
Use Scenario: Storing vehicle-specific configuration parameters (e.g., door lock logic, lighting profiles) in body control modules subject to automotive temperature cycling. IC Role / Device Role / Timing Role: Parameter block storage (two 8 KB sections) supporting independent update of feature sets without full memory erase. Use Value: Allows dealership-level personalization updates via CAN diagnostics; sector erase isolates changes to avoid disrupting active functions. | Use Scenario: Retaining switch/router MAC addresses, VLAN settings, and firmware version stamps across power cycles in enterprise networking hardware. IC Role / Device Role / Timing Role: Persistent configuration register bank with fast 30 µs byte programming for dynamic runtime updates during provisioning. Use Value: Eliminates need for external EEPROM; 3.3 V compatibility simplifies power domain design; DATA polling enables deterministic update completion signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-70-4C-NHE | 3.0–3.6 V supply, 70 ns access, 2 Mbit density, same PLCC-32 package; lacks RESET pin and 12 V boot override | No hardware boot block lockout override; relies solely on software lock/unlock commands | Select when boot block reprogramming under lockout is unnecessary and cost sensitivity outweighs override flexibility |
| MX29LV002CTTI-12 | 3.0–3.6 V supply, 120 ns access, 2 Mbit density, PLCC-32; includes CFI-compliant command set and status register polling | Uses standard Common Flash Interface protocol instead of Atmel-specific command sequences | Select when migrating to CFI-based toolchains or requiring vendor-agnostic flash management firmware |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49LV002-12VI uniquely provides 12 V RESET override for boot block reprogramming - critical for recovery in locked-field deployments - while maintaining identical timing, voltage, and packaging for drop-in replacement where that feature is unused.
Availability
AT49LV002-12VI is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive body electronics, and networking infrastructure requiring stable component supply with long-term obsolescence planning.
Supply support for AT49LV002-12VI 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 including the AT49LV series for industrial and automotive applications.
The AT49LV002-12VI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in 3 V embedded systems where space, power, and field-upgrade capability are critical constraints.
FAQ
What is the operating temperature range for the AT49LV002-12VI?
The AT49LV002-12VI is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the "DC and AC Operating Range" table of the official datasheet (Rev. 0982D), where the "I" suffix in the ordering code denotes industrial grade. The device maintains full functionality-including 120 ns read access, 10-second erase, and 30 µs byte programming-across this full range.
Does the AT49LV002-12VI require a 5 V programming voltage?
No, the AT49LV002-12VI does not require a 5 V programming voltage. It operates exclusively from a 3.0–3.6 V supply for both read and write operations. Programming is performed using standard 5 V logic-level command sequences applied to the address and data bus, but all internal programming pulses are generated autonomously - eliminating external VPP requirements. This is explicitly stated in the "Description" section and verified in the "Features" list.
How is the boot block protected on the AT49LV002-12VI?
The AT49LV002-12VI protects its 16 KB boot block (address range 00000H–03FFFH) via a software-enabled lockout feature. Once activated using a documented six-cycle command sequence (5555H/AA → 2AAAH/55 → 5555H/80 → 5555H/AA → 2AAAH/55 → 5555H/40), the boot block becomes immune to erase and program commands at ≤5.5 V. The AT49LV002-12VI retains the 12 V RESET override capability to re-enable programming if needed.
What package type is used for the AT49LV002-12VI?
The AT49LV002-12VI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as "32J" in Atmel's ordering nomenclature. This is confirmed in the "AT49LV002 Ordering Information" table (page 15), where "AT49LV002-12JI" specifies the industrial-grade, 120 ns version in PLCC. Pin configurations, including DC (don't connect) on pin 1, match the PLCC top view diagram on page 5.
Can the AT49LV002-12VI be used as a direct replacement for the AT49BV002-12VI?
The AT49LV002-12VI and AT49BV002-12VI share identical pinout, timing, and command-set architecture but differ in supply voltage range: AT49LV002-12VI operates from 3.0–3.6 V only, while AT49BV002-12VI supports 2.7–3.6 V. They are functionally interchangeable in 3.3 V systems, but AT49LV002-12VI must not be used in 2.7 V designs. Both support boot block lockout and 12 V RESET override, confirming functional equivalence where voltage margins permit.
AT49LV002-12VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49LV002-12VI FAQ
1.How can I place an order for AT49LV002-12VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002-12VI 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 AT49LV002-12VI reliable?
The price and inventory of AT49LV002-12VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002-12VI is usually 5 days.
3.What payment methods are accepted for AT49LV002-12VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002-12VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002-12VI?
AT49LV002-12VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002-12VI 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 AT49LV002-12VI?
For technical support, including AT49LV002-12VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002-12VI requirements.
6.How does Aetrix verify that AT49LV002-12VI is sourced from the original manufacturer or authorized distributors?
All AT49LV002-12VI 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 AT49LV002-12VI meets industry standards.
7.What is the process for return or replacement of AT49LV002-12VI?
All AT49LV002-12VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002-12VI, 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 AT49LV002-12VI part is unused and in its original packaging.
Return procedure for AT49LV002-12VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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