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Microchip Technology AT49LV002N-12VC
- Part No.:
- AT49LV002N-12VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV002N-12VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,907
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Product details
Overview
AT49LV002N-12VC 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 features 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and hardware data protection - enabling secure boot code retention in industrial control firmware updates.
For engineers reviewing the AT49LV002N-12VC datasheet, AT49LV002N-12VC pinout, AT49LV002N-12VC application, or AT49LV002N-12VC equivalent, key selection criteria include its 32-pin VSOP package, boot block lockout capability, DC/AC timing compliance at 120 ns tACC, and compatibility with standard 8-bit parallel bus interfaces in legacy MCU designs.
Technical Context
The AT49LV002N-12VC implements a parallel-interface Flash memory architecture with five distinct memory sectors: one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB). Its command-set-driven operation uses standard CE/OE/WE controls and supports software-based chip/sector erase and byte programming without high-voltage inputs.
It integrates internal program control logic, DATA polling (I/O7 complement detection), and Toggle Bit (I/O6 toggling) for cycle completion monitoring. Hardware protection includes VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and input state validation (OE low, CE high, or WE high disables writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - supports full 8-bit data bus interfacing with legacy 8051, Z80, or 68K-based controllers. |
| Read Access Time | 120 ns max (tACC) - ensures compatibility with microcontrollers running at ≤8 MHz system clock without wait states. |
| Supply Voltage | 3.0 V to 3.6 V only - eliminates need for 5 V or 12 V programming supplies; compatible with modern low-voltage embedded power rails. |
| Erase Time | 10 seconds typical for full chip erase - enables field firmware updates within predictable maintenance windows. |
| Programming Speed | 30 µs/byte typical - allows rapid patching of small code/data segments without blocking system execution for extended periods. |
| Endurance | 10,000 write/erase cycles - sufficient for infrequent firmware upgrades over 10+ year product lifecycles in industrial equipment. |
| Standby Current | 50 µA CMOS - minimizes quiescent power in battery-backed or energy-sensitive applications like remote sensors. |
Pinout & Package
AT49LV002N-12VC is housed in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, 0.5 mm lead pitch, JEDEC MO-178 compliant. Pin 1 is located at bottom-left corner (notch-marked side), with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A15 used for byte selection, A16–A17 for block selection in sector commands. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write operations; supports standard microprocessor bus timing with OE/CE/WE handshaking. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; high-Z output when deasserted. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during multi-device sharing; required high during programming. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence; must be high during reads. |
| RESET | Reset Input | Active-low reset; forces outputs to high-Z and halts ongoing operations; not used for boot lock override (unavailable on N variant). |
| VCC | Power Supply | 3.0–3.6 V supply; internal regulation enables stable programming/erasing across voltage range without external regulators. |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor (0.1 µF) required near VCC pin for noise immunity. |
| DC | No Connect | Pin 9 (TSOP/VSOP); must remain unconnected - floating or tied to GND/VCC causes undefined behavior or damage. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16 KB boot block (00000H–03FFFH) supports permanent write-protection after lockout enable - secures bootloader integrity against accidental overwrite. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line validation prevent spurious writes during power transients or EMI events - critical for reliability in factory automation. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggle provide real-time, software-pollable status of program/erase completion - eliminates need for fixed delay timers in host firmware. |
| Single 3.3 V Operation | No 5 V or 12 V programming voltages required - simplifies PCB design and reduces BOM count versus older EPROM/Flash families. |
| Standard Parallel Interface | CE/OE/WE control logic matches industry-standard SRAM/EPROM timing - enables drop-in replacement in existing 8-bit bus designs without logic redesign. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Controller Boot Memory |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding initialization code and ladder logic interpreter; accessed via 8-bit parallel bus during cold start and runtime updates. Use Value: 10,000-cycle endurance and 50 µA standby current ensure long-term reliability and low-power operation between scheduled firmware patches. | Use Scenario: Replacing obsolete EPROMs in aging medical device controllers where board space and voltage compatibility constrain upgrade options. IC Role / Device Role / Timing Role: Direct 8-bit bus-compatible Flash memory providing read-access timing ≤120 ns to meet legacy 80C51 timing budgets without wait-state insertion. Use Value: Single 3.3 V supply eliminates need for 5 V programming circuitry, reducing redesign effort and qualification risk. |
| Secure Bootloader Storage | Parameter Configuration Memory |
Use Scenario: Holding immutable bootloader code in network-connected edge devices requiring verified firmware launch before loading application images. IC Role / Device Role / Timing Role: Boot block (00000H–03FFFH) configured with permanent lockout to prevent unauthorized modification of startup routines. Use Value: Hardware-enforced boot block protection prevents corruption during OTA updates or field service operations. | Use Scenario: Storing calibration coefficients, device-specific settings, and user preferences in test equipment that retains configuration across power cycles. IC Role / Device Role / Timing Role: Two dedicated 8 KB parameter blocks support independent erasure and reprogramming without affecting main firmware or boot code. Use Value: Sector-level erase enables fast, targeted updates of configuration data without full chip reprogramming delays. |
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 | 3.3 V-only, 2 Mbit, 70 ns access, same 32-pin TSOP/VSOP footprint but no boot block lockout feature. | Lacks hardware-protected boot sector; requires external software management for bootloader security. | Choose when boot protection is handled in firmware and faster 70 ns read speed is prioritized over lockout assurance. |
| MX29LV002CTTI-12 | 3.3 V-only, 2 Mbit, 120 ns access, identical sector map and boot lockout command set but different manufacturer ID and timing tolerances. | Pin-compatible and functionally aligned; requires verification of RESET pin behavior and VCC sense threshold in target system. | Choose for second-source continuity where identical AC/DC specs and lockout functionality are confirmed in system validation. |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49LV002N-12VC provides guaranteed boot block lockout enforcement and tighter VCC sense (1.8 V typ), making it preferable for safety-critical boot storage where hardware-level write prevention is mandatory.
Availability
AT49LV002N-12VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded controller boot memory, and secure bootloader storage requiring stable component supply across extended production lifecycles.
Supply support for AT49LV002N-12VC 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 AT49LV002N-12VC belongs to Atmel's Battery-Voltage™ Flash memory family, designed specifically for reliable, low-voltage in-system reprogramming in cost-sensitive industrial and consumer embedded systems.
FAQ
What is the maximum operating temperature range for the AT49LV002N-12VC?
The AT49LV002N-12VC 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 "-12" speed grade suffix denotes 120 ns access time and "I" suffix indicates industrial range - though the "N" variant packaging (VSOP) carries this rating by default per ordering information tables.
Does the AT49LV002N-12VC support hardware reset-based boot block reprogramming?
No, the AT49LV002N-12VC does not support hardware reset-based boot block reprogramming. The datasheet explicitly states "The RESET feature is not available on the AT49BV/LV002N(T)" and confirms that the 12 V RESET override for boot lockout is unavailable on N-suffix variants. Only the T-suffix versions (e.g., AT49LV002T) support this override function.
How is the boot block protected from accidental programming on the AT49LV002N-12VC?
The AT49LV002N-12VC protects its 16 KB boot block (00000H–03FFFH) using a six-command software lockout sequence. Once enabled, programming and erasure of the boot block are permanently disabled under standard 3.3 V operation. The lockout status can be verified by reading address 00002H in software product identification mode, where I/O0 = high indicates active protection.
What package type is used for the AT49LV002N-12VC?
The AT49LV002N-12VC uses a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body size, per the "AT49LV002N Ordering Information" table (page 17). The "VC" suffix explicitly denotes VSOP packaging, distinguishing it from "JC" (PLCC), "PC" (PDIP), and "TC" (TSOP) variants.
Can the AT49LV002N-12VC be used as a direct replacement for the AT49BV002N-12VC?
No - the AT49LV002N-12VC and AT49BV002N-12VC differ in supply voltage range: the LV version operates at 3.0–3.6 V, while the BV version supports 2.7–3.6 V. Although pinout and timing are identical, the lower 2.7 V minimum of the BV variant enables operation in wider battery-discharge scenarios. Substitution requires verification that the host system maintains ≥3.0 V under all conditions.
AT49LV002N-12VC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49LV002N-12VC FAQ
1.How can I place an order for AT49LV002N-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002N-12VC 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-12VC reliable?
The price and inventory of AT49LV002N-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002N-12VC is usually 5 days.
3.What payment methods are accepted for AT49LV002N-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002N-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002N-12VC?
AT49LV002N-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002N-12VC 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-12VC?
For technical support, including AT49LV002N-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002N-12VC requirements.
6.How does Aetrix verify that AT49LV002N-12VC is sourced from the original manufacturer or authorized distributors?
All AT49LV002N-12VC 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-12VC meets industry standards.
7.What is the process for return or replacement of AT49LV002N-12VC?
All AT49LV002N-12VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002N-12VC, 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-12VC part is unused and in its original packaging.
Return procedure for AT49LV002N-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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