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Microchip Technology AT49LV002N-12VI
- Part No.:
- AT49LV002N-12VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV002N-12VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,306
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Product details
Overview
AT49LV002N-12VI from Microchip Technology (formerly Atmel) is a 2-Mbit (256K × 8) single-supply 3.0–3.6V 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 AT49LV002N-12VI datasheet, AT49LV002N-12VI pinout, AT49LV002N-12VI application, or AT49LV002N-12VI equivalent, key selection considerations include its 32-pin PLCC package, boot block lockout feature, sector-based erase architecture (16K-byte boot + two 8K-byte parameter + two main memory blocks), and compatibility with standard microprocessor bus timing without high-voltage programming.
Technical Context
The AT49LV002N-12VI implements a CMOS-based Flash memory architecture with internal program control logic and auto-timed erase cycles. Its sector organization includes one 16K-byte boot block with programmable lockout, two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes), supporting selective erasure and in-system reprogramming via standard CE/OE/WE control signals.
It operates in standard EPROM-compatible read mode (CE & OE low, WE high) and supports command-based operations including chip erase, sector erase, byte programming, and software product identification. The RESET pin is DC-connected (not functional for reset or boot override), distinguishing it from T-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for bootloader + configuration storage in 8-bit/16-bit MCU systems. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with 3.3V logic systems; no 5V or high-voltage programming required. |
| Read Access Time | 120 ns (max) - meets timing for medium-speed microcontroller address/data buses. |
| Erase Cycle Time | 10 seconds (typical) - enables rapid field firmware updates without external erase equipment. |
| Byte Programming Time | 30 µs (typical) - supports fine-grained patching of stored parameters or calibration data. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - validated for long-term use in industrial logging and configuration storage. |
| Standby Current | 50 µA (CMOS) - suitable for battery-backed or low-power sleep-mode applications. |
Pinout & Package
AT49LV002N-12VI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-bend leads. Pin 1 is designated as A7 (address line), and pin 32 is VCC. Pin 16 is DC (Do Not Connect) per datasheet Rev. 0982D–FLASH–02/03.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A15 used for byte-level access within sectors. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in shared-memory systems. |
| OE | Output Enable | Active-low output control; allows data output gating independent of CE - essential for multiplexed bus arbitration. |
| WE | Write Enable | Active-low write strobe; latches address and data during programming/erase command sequences per Atmel's 6-cycle protocol. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read data output and program data input; supports true bidirectional operation without external transceivers. |
| RESET | Reset Input | DC-connected (non-functional); tied internally to VCC level - no reset assertion or boot override capability (unlike T-suffix variants). |
| GND / VCC | Power Supply | Single 3.3V supply; VCC on pin 32, GND on pin 17 - requires local 0.1 µF decoupling per JEDEC guidelines. |
| DC | No Connect | Pin 16 is unconnected; must be left floating or grounded per PCB layout best practices - not usable as I/O or control. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code - activated via 6-cycle command sequence; once enabled, contents are permanent under 5.5V max. |
| Sector-Erasable Architecture | Independent erasure of two 8K-byte parameter blocks and two main memory blocks (96K/128K) - enables modular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense (<1.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low/CE high/WE high blocks writes) - ensures robustness in electrically noisy industrial environments. |
| DATA Polling & Toggle Bit | Real-time end-of-program detection via I/O7 complement or I/O6 toggling - eliminates fixed delays and improves host CPU efficiency during flash operations. |
| Low-Power CMOS Standby | 50 µA max standby current - extends battery life in portable or energy-harvesting edge devices requiring persistent nonvolatile storage. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration 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/data storage with sector-erase granularity and boot block lockout to preserve core runtime engine. Use Value: Enables safe over-the-air updates without risk of bricking the controller; 10,000-cycle endurance supports >10 years of scheduled maintenance cycles. | Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Low-power, tamper-resistant parameter storage accessed during power-on initialization and runtime calibration. Use Value: 50 µA standby current extends battery service life; hardware write protection prevents corruption during brown-out conditions. |
| Automotive Body Control Module Bootloader | Networking Equipment Boot Image Storage |
Use Scenario: Hosting secure bootloader code in automotive BCMs that must pass ISO 26262 ASIL-B functional safety checks. IC Role / Device Role / Timing Role: Read-only boot memory with permanent lockout after initial programming - verified at system startup before loading application firmware. Use Value: 16K-byte boot block provides space for cryptographic signature verification routines; DC-connected RESET eliminates unintended reset-induced corruption. | Use Scenario: Storing primary and fallback boot images in managed Ethernet switches requiring zero-downtime firmware upgrades. IC Role / Device Role / Timing Role: Dual-main-block architecture allows A/B partitioning - one block active while the other is erased and reprogrammed. Use Value: Sector erase capability enables atomic image swaps; 120 ns read timing satisfies switch ASIC bus requirements without wait states. |
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 | 3.0–3.6V supply, 70 ns access, 2 Mbit density, PLCC-32 package - but lacks boot block lockout and uses different command set. | No hardware-enforced boot protection; requires host-side logic to prevent accidental overwrite of critical code regions. | Select when cost sensitivity outweighs need for integrated boot security; verify command compatibility in existing firmware. |
| MX29LV002CTTI-12 | 3.0–3.6V, 120 ns access, 2 Mbit, PLCC-32 - includes boot block (8K) with lockout, but only 8K vs. 16K boot region and slower 120 ns read. | Smaller protected boot area limits space for complex secure boot stacks; identical timing grade (-12) but lower endurance (100K cycles). | Prefer when larger boot footprint is unnecessary and higher write endurance is required; validate sector map alignment with legacy designs. |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49LV002N-12VI offers the largest dedicated boot block (16K), native support for both DATA polling and Toggle Bit detection, and proven 10,000-cycle reliability - making it optimal for safety-critical or long-lifecycle embedded systems where code integrity is non-negotiable.
Availability
AT49LV002N-12VI is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive body electronics, and networking infrastructure requiring stable component supply across extended production lifecycles.
Supply support for AT49LV002N-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 full technical and manufacturing continuity for the AT49LV series Flash memories.
The AT49LV002N-12VI belongs to Atmel's legacy Battery-Voltage™ Flash family, designed specifically for reliable, low-voltage in-system reprogramming in resource-constrained embedded systems without external high-voltage circuitry.
FAQ
What is the operating temperature range for the AT49LV002N-12VI?
The AT49LV002N-12VI is rated for industrial temperature operation from -40°C to +85°C. This range is confirmed in the AT49LV002N Ordering Information table (page 17), where the "-VI" suffix explicitly denotes the industrial-grade variant. Its performance specifications - including 120 ns maximum read access time and 50 µA standby current - are guaranteed across this full range.
Does the AT49LV002N-12VI support hardware reset functionality?
No, the AT49LV002N-12VI does not support hardware reset. Per datasheet Rev. 0982D–FLASH–02/03, page 2, the RESET pin is designated as "DC" (Don't Connect) for the N-suffix variants. It is internally tied to VCC and has no functional reset behavior - unlike T-suffix parts where RESET enables boot override at 12V. Host systems must manage reset sequencing externally.
How is boot block protection implemented in the AT49LV002N-12VI?
The AT49LV002N-12VI implements boot block protection via a 6-cycle command sequence (AAh, 55h, 80h, AAh, 55h, 40h at address 5555h) that permanently locks the 16K-byte boot sector (00000H–03FFFH). Once enabled, programming or erasing this region is inhibited under normal 3.0–3.6V operation - ensuring bootloader integrity in deployed systems.
Can the AT49LV002N-12VI be used as a direct replacement for the AT49BV002N-12VI?
No - the AT49LV002N-12VI and AT49BV002N-12VI differ in supply voltage range: the LV version requires 3.0–3.6V, while the BV version supports 2.7–3.6V. Although pinout, timing, and command sets are identical, substituting them without verifying system VCC stability at 2.7V may cause read/write failures below 3.0V. Electrical validation is required before interchange.
What package type is used for the AT49LV002N-12VI?
The AT49LV002N-12VI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, identified by the "J" suffix in ordering codes (e.g., AT49LV002N-12JC). This surface-mount package features J-bend leads, measures 11.43 mm × 13.97 mm, and is RoHS-compliant - suitable for automated assembly and high-reliability industrial PCBs.
AT49LV002N-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
AT49LV002N-12VI FAQ
1.How can I place an order for AT49LV002N-12VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002N-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 AT49LV002N-12VI reliable?
The price and inventory of AT49LV002N-12VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002N-12VI is usually 5 days.
3.What payment methods are accepted for AT49LV002N-12VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002N-12VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002N-12VI?
AT49LV002N-12VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002N-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 AT49LV002N-12VI?
For technical support, including AT49LV002N-12VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002N-12VI requirements.
6.How does Aetrix verify that AT49LV002N-12VI is sourced from the original manufacturer or authorized distributors?
All AT49LV002N-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 AT49LV002N-12VI meets industry standards.
7.What is the process for return or replacement of AT49LV002N-12VI?
All AT49LV002N-12VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002N-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 AT49LV002N-12VI part is unused and in its original packaging.
Return procedure for AT49LV002N-12VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV002N-12VI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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