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Microchip Technology AT49LV002T-12VI
- Part No.:
- AT49LV002T-12VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV002T-12VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,735
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Product details
Overview
AT49LV002T-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 120 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across the industrial temperature range (−40°C to +85°C). It is commonly deployed in firmware boot storage for industrial controllers and legacy communication modules.
For engineers reviewing the AT49LV002T-12VI datasheet, AT49LV002T-12VI pinout, AT49LV002T-12VI application, or AT49LV002T-12VI equivalent, key selection considerations include its 32-pin PLCC package, boot block lockout capability (address range 3C000H–3FFFFH), DATA polling and toggle-bit programming status detection, and compatibility with standard 5V-command logic despite 3.3V-only operation.
Technical Context
This device implements a sector-organized Flash architecture with one 16 KB boot block (3C000H–3FFFFH), two 8 KB parameter blocks (3A000H–3BFFFH and 38000H–39FFFH), and two main memory blocks (20000H–37FFFH and 00000H–1FFFFH). Its command-set-driven operation uses six-byte sequences for chip/sector erase and four-byte sequences for byte programming, all executed via standard CE/OE/WE control lines without requiring external high-voltage generators.
Hardware data protection includes VCC sense (program inhibited below 1.8 V), noise filtering on WE/CE (<15 ns pulses ignored), and active inhibit conditions (OE low, CE high, or WE high). The RESET pin supports both system reset and 12 V override of boot block lockout - a feature confirmed for the AT49LV002T variant but not present in N-suffix versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Supply Voltage | 3.0 V to 3.6 V - enables direct interface with 3.3 V microcontrollers without level shifting |
| Read Access Time | 120 ns - determines maximum sustained instruction fetch rate in CPU boot path |
| Byte Programming Time | 30 µs typical - defines minimum write latency per byte during field firmware updates |
| Erase Cycle Time | 10 seconds max for full chip erase - constrains time budget for in-system reprogramming sequences |
| Endurance | 10,000 program/erase cycles - sets lifetime limit for dynamic configuration storage applications |
| Operating Temperature | −40°C to +85°C - qualifies for industrial-grade embedded deployment |
Pinout & Package
AT49LV002T-12VI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-bend leads, compatible with standard PLCC sockets and reflow soldering profiles for industrial PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing (A0–A17 = 00000H–3FFFFH) |
| I/O0–I/O7 | Data Input/Output | Bi-directional 8-bit data bus; latched on rising edge of WE or CE during programming |
| 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 multi-device sharing |
| WE | Write Enable | Active-low write strobe; falling edge latches address, rising edge latches data during programming |
| RESET | Reset / Boot Override | Logic-high enables normal operation; 12 V pulse overrides boot block lockout (confirmed for T-suffix) |
| VCC | Power Supply | 3.0–3.6 V supply input; internal regulation ensures stable core voltage during programming |
| GND | Ground | Reference return path for all digital and programming currents |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (3C000H–3FFFFH) prevents accidental overwrite of bootloader code; enabled via 6-byte command sequence |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, hardware-verified end-of-program/erase indication without polling overhead or timer dependencies |
| Sector-Erasable Architecture | Independent erasure of two 8 KB parameter blocks and two main memory blocks enables granular firmware update without full chip erase |
| Hardware Data Protection | VCC sensing, noise filtering, and control-line inhibit logic eliminate risk of spurious writes during power transients or EMI events |
| Single 3.3 V Supply Operation | Eliminates need for 5 V or 12 V programming supplies - simplifies power design and reduces BOM count in 3.3 V systems |
Applications
| Industrial PLC Firmware Storage | Legacy Telecom Module Boot Memory |
|---|---|
Use Scenario: Storing boot loader and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup execution and field-upgradable firmware image storage. Use Value: 10,000-cycle endurance and −40°C to +85°C rating ensure long-term reliability; boot block lockout prevents corruption of critical startup code during remote updates. |
Use Scenario: Holding initialization code and protocol stack binaries in discontinued ISDN or T1/E1 line cards requiring extended service life. IC Role / Device Role / Timing Role: In-system reprogrammable Flash replacing obsolete EPROMs in legacy telecom infrastructure. Use Value: 120 ns read access meets timing budgets of older 8/16-bit microcontrollers; PLCC package allows socket-based field replacement without PCB rework. |
| Embedded HMI Display Controller | Automotive Diagnostic Tool Memory |
Use Scenario: Storing GUI assets, font tables, and calibration data in human-machine interface panels used in medical equipment. IC Role / Device Role / Timing Role: Code/data storage IC interfaced directly to an 8-bit MCU's parallel bus for low-latency display rendering. Use Value: Sector architecture enables independent update of language packs or UI themes without erasing calibration constants stored in parameter blocks. |
Use Scenario: Retaining vehicle-specific diagnostic routines and CAN protocol definitions in handheld OBD-II tools. IC Role / Device Role / Timing Role: Field-updatable firmware repository supporting multi-vehicle coverage via downloadable binary patches. Use Value: DATA polling enables robust, interrupt-driven programming confirmation; 3.3 V operation aligns with modern low-power battery-powered tool designs. |
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, 2 Mbit, 120 ns access, PLCC-32; lacks RESET-based boot override and has different command set | No hardware boot lockout override; requires software-managed protection schemes | Choose when strict Atmel command compatibility is unnecessary and lower cost is prioritized |
| MX29LV020TC-12V | 3.3 V, 2 Mbit, 120 ns, PLCC-32; supports CFI query but no 12 V RESET override | CFI compliance simplifies auto-detection in generic programmers; boot protection relies on software lock bits only | Prefer for systems using standardized Flash programming utilities that require CFI support |
Compared with SST39VF020-120-4C-NHE and MX29LV020TC-12V, the AT49LV002T-12VI uniquely provides 12 V RESET-triggered boot block reprogramming - a hardware-level recovery mechanism critical for unattended field updates where software lockout may become permanent.
Availability
AT49LV002T-12VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy telecom module boot memory, and embedded HMI display controller applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV002T-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 support for legacy Atmel Flash products including the AT49LV series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial and automotive markets.
The AT49LV002T-12VI 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 hardware-assisted protection are essential.
FAQ
What is the function of the RESET pin on the AT49LV002T-12VI?
The RESET pin on the AT49LV002T-12VI serves dual purposes: at TTL logic levels (≤0.8 V), it places the device in high-impedance reset state; when driven to 12.0 V ± 0.5 V, it overrides the boot block programming lockout - a feature confirmed for the T-suffix variant and absent in N-suffix versions. This enables emergency reprogramming of protected bootloader regions without requiring full device replacement.
Does the AT49LV002T-12VI require a 5 V supply for command execution?
No, the AT49LV002T-12VI operates exclusively from a 3.0–3.6 V supply and uses 5 V–level command inputs (e.g., "AA", "55") for compatibility with legacy 5 V microcontrollers - but no 5 V supply rail is needed. All internal programming voltages are generated on-chip, eliminating external charge pumps or high-voltage generators required by older Flash technologies.
How is boot block protection enabled and verified on the AT49LV002T-12VI?
Boot block protection on the AT49LV002T-12VI is enabled via a documented six-byte command sequence written to addresses 5555H/2AAAH/5555H/5555H/2AAAH/5555H with data values AAH/55H/80H/AAH/55H/40H. Verification is performed in Software Product Identification mode by reading bit I/O0 at address 3C002H: low = unlocked, high = locked. This behavior is specific to the T-suffix part and differs from the base AT49LV002(N) variant.
What package type is used for the AT49LV002T-12VI?
The AT49LV002T-12VI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC) with J-bend leads (package code 32J). This surface-mount package supports socket-based prototyping and rework, offers robust thermal and mechanical performance in industrial environments, and is pin-compatible with other members of the AT49BV/LV002(N)(T) family in the same package variant.
Can the AT49LV002T-12VI be used as a direct replacement for the AT49BV002T-12VI?
No - the AT49LV002T-12VI and AT49BV002T-12VI differ in supply voltage range: the LV version requires 3.0–3.6 V, while the BV version supports 2.7–3.6 V. Although pinout, timing, and command set are identical, substituting the LV part into a 2.7 V system will cause functional failure. Voltage tolerance must be validated per application; the "LV" designation explicitly denotes stricter 3.0 V minimum operation.
AT49LV002T-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
AT49LV002T-12VI FAQ
1.How can I place an order for AT49LV002T-12VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002T-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 AT49LV002T-12VI reliable?
The price and inventory of AT49LV002T-12VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002T-12VI is usually 5 days.
3.What payment methods are accepted for AT49LV002T-12VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002T-12VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002T-12VI?
AT49LV002T-12VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002T-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 AT49LV002T-12VI?
For technical support, including AT49LV002T-12VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002T-12VI requirements.
6.How does Aetrix verify that AT49LV002T-12VI is sourced from the original manufacturer or authorized distributors?
All AT49LV002T-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 AT49LV002T-12VI meets industry standards.
7.What is the process for return or replacement of AT49LV002T-12VI?
All AT49LV002T-12VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002T-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 AT49LV002T-12VI part is unused and in its original packaging.
Return procedure for AT49LV002T-12VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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