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Microchip Technology AT49LV002T-12VC
- Part No.:
- AT49LV002T-12VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV002T-12VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,169
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Product details
Overview
AT49LV002T-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/data storage in embedded microcontroller systems. It delivers 120 ns read access time, 10-second chip erase, byte-programming at 30 µs/byte typical, and features hardware data protection, DATA polling, and a 16 KB boot block with programmable lockout. It is commonly deployed in industrial firmware update modules requiring field-reprogrammable BIOS or bootloader storage.
For engineers reviewing the AT49LV002T-12VC datasheet, AT49LV002T-12VC pinout, AT49LV002T-12VC application, or AT49LV002T-12VC equivalent, key selection considerations include its 32-pin VSOP (8 × 14 mm) package, boot block address range (3C000H–3FFFFH), sector-erase capability across two 8 KB parameter blocks and two main memory blocks (96 KB + 128 KB), and compatibility with standard 5V-command protocols despite 3.3 V operation.
Technical Context
The AT49LV002T-12VC implements a command-register-based architecture using standard microprocessor CE/OE/WE control lines-no high-voltage programming required. Its internal logic supports software-controlled chip erase (6-byte sequence), sector erase (targeting specific 8 KB or 128 KB regions), and byte-by-byte programming with automatic pulse generation.
It integrates hardware safeguards including VCC sense (<1.8 V inhibits programming), noise filtering on WE/CE (rejects <15 ns pulses), and dual-line bus contention prevention via independent CE and OE enable. The RESET pin enables system-level reset and-when driven to 12 V-overrides boot block lockout for emergency reprogramming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - supports full firmware images up to 256 KB in size. |
| Read Access Time | 120 ns max - determines minimum CPU wait states when interfacing with 8-bit microcontrollers like 8051 or PIC18 families. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard 3.3 V logic rails; no separate VPP required for programming. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables predictable firmware update windows in production test or field service. |
| Byte Programming Time | 30 µs typical - allows efficient patching of small configuration or calibration data without full-block overhead. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed timing delays in host firmware. |
| Write Endurance | 10,000 program/erase cycles - suitable for applications requiring infrequent but reliable field updates over 10+ year product lifecycles. |
Pinout & Package
AT49LV002T-12VC is supplied in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, 0.5 mm lead pitch, RoHS-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–A16 used for byte-level access, A17 selects upper/lower half. |
| I/O0–I/O7 | Data Input/Output | Bi-directional 8-bit data bus; latched on rising edge of WE or CE during write, driven on falling CE/OE during read. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read; inhibits all operations when high. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, preventing bus contention. |
| WE | Write Enable | Active-low write strobe; initiates command loading, byte programming, or erase when CE is also low and OE is high. |
| RESET | Reset Input | Active-low system reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override. |
| VCC | Power Supply | +3.0 V to +3.6 V supply; powers core logic and I/O buffers; decoupling capacitor (0.1 µF) required near pin. |
| GND | Ground | Reference return path for VCC and all signals; requires low-inductance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB region (3C000H–3FFFFH) programmable-lockable via 6-byte command sequence; prevents accidental overwrite of critical bootloader code. |
| Sector Architecture | Four independently erasable sectors: two 8 KB parameter blocks + two main memory blocks (96 KB and 128 KB); enables modular firmware updates without full-chip erase. |
| Hardware Data Protection | VCC sense, noise-filtered WE/CE inputs, and OE/CE/WE interlock prevent spurious writes during power-up, EMI events, or signal glitches. |
| 12 V RESET Override | Applying 12 V ± 0.5 V to RESET pin during programming/erase temporarily disables boot block lockout - essential for recovery in locked-field deployments. |
| Standard Command Interface | Uses industry-standard 5555H/2AAAH address/data sequences (e.g., Chip Erase = 5555H/AA, 2AAAH/55, 5555H/80, etc.) - simplifies integration with existing Flash programming toolchains. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O configuration in programmable logic controllers operating in factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing direct 8-bit parallel interface to ARM Cortex-M4 MCU; 120 ns access aligns with 8 MHz bus timing. Use Value: Sector erase enables updating only logic modules while preserving calibration data in parameter blocks, reducing downtime during maintenance. | Use Scenario: Securing certified bootloader code in FDA-cleared diagnostic equipment where regulatory compliance mandates immutable startup routines. IC Role / Device Role / Timing Role: Dedicated boot memory IC with hardware-enforced write protection; RESET-driven 12 V override supports authorized service-mode reflash. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates, satisfying IEC 62304 software lifecycle requirements. |
| Automotive Telematics Module | Network Router Configuration Storage |
Use Scenario: Holding OTA-updatable firmware and vehicle-specific calibration maps in Tier-1 telematics control units exposed to -40°C to +85°C ambient. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory interfaced to Infineon AURIX TC3xx via parallel bus; operates across full industrial temperature range. Use Value: 3.0–3.6 V single supply eliminates level-shifting; 10-second erase enables rapid firmware rollback during failed updates. | Use Scenario: Storing persistent configuration, routing tables, and security certificates in enterprise-grade Ethernet switches requiring zero-downtime reconfiguration. IC Role / Device Role / Timing Role: Parallel-interface Flash memory mapped into MIPS-based network processor's memory space; supports hot-swap firmware patches. Use Value: DATA polling and Toggle Bit allow deterministic end-of-write detection without timer interrupts, improving real-time response in packet-forwarding paths. |
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, 2 Mbit, 70 ns access, 32-pin TSOP; lacks 12 V RESET override and boot block lockout override. | Supports faster read but offers no hardware-secured boot region recovery path - unsuitable for safety-critical bootloader storage. | Select when maximum read speed is prioritized over field-recovery capability and boot integrity enforcement. |
| MX29LV002CTTI-12 | 3.0–3.6 V, 2 Mbit, 120 ns access, 32-pin TSOP; includes boot block protection but no 12 V override; uses different command set (e.g., 5555H/AA → 5555H/A0). | Compatible pinout and timing, but requires firmware adaptation for command sequences and lacks RESET-based emergency unlock. | Select for drop-in replacement where existing SST39-style command handling is unavailable and boot block override is not required. |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49LV002T-12VC uniquely combines 120 ns timing with hardware-enforced boot block security *and* a dedicated 12 V RESET override - making it the only option among the three that guarantees recoverability after accidental lockout in deployed systems.
Availability
AT49LV002T-12VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader implementation, automotive telematics module updates, and network router configuration retention requiring stable component supply across extended product lifecycles.
Supply support for AT49LV002T-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 memory products, including manufacturing, documentation, and long-term supply assurance.
The AT49LV002T-12VC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in battery-powered and 3.3 V embedded systems where voltage headroom is constrained and firmware integrity is mission-critical.
FAQ
What is the boot block address range for AT49LV002T-12VC?
The boot block for AT49LV002T-12VC occupies addresses 3C000H to 3FFFFH (16 KB). This differs from non-T variants (e.g., AT49LV002N), which locate the boot block at 00000H–03FFFH. The T-suffix denotes top-boot architecture, placing protected code at the highest memory address for natural alignment with reset vector fetches in most 8-bit and 16-bit microcontrollers.
Does AT49LV002T-12VC require a high-voltage programming supply?
No, AT49LV002T-12VC operates with a single 3.0–3.6 V supply for both read and write operations. Programming and erase are executed using standard 5V-level command sequences applied to the address/data bus - no external VPP generator or high-voltage circuitry is needed. This simplifies PCB design and reduces BOM cost compared to older Flash devices requiring 12 V programming.
How is boot block lockout enabled or verified on AT49LV002T-12VC?
Boot block lockout is enabled by issuing a six-cycle command sequence (5555H/AA, 2AAAH/55, 5555H/80, 5555H/AA, 2AAAH/55, 5555H/40). Verification is performed in Software Product Identification mode: reading address 3C002H returns I/O0 = high if lockout is active. The AT49LV002T-12VC datasheet specifies this exact address offset due to its top-boot layout.
What package type is used for AT49LV002T-12VC?
AT49LV002T-12VC is packaged in a 32-lead Very Small Outline Package (VSOP), measuring 8 mm × 14 mm with 0.5 mm lead pitch. This surface-mount package provides higher board density than PDIP or PLCC alternatives and is optimized for automated assembly in high-volume industrial and networking equipment.
Can AT49LV002T-12VC be erased sector-by-sector?
Yes, AT49LV002T-12VC supports sector erase for all four defined regions: Parameter Block 1 (3A000H–3BFFFH), Parameter Block 2 (38000H–39FFFH), Main Memory Block 1 (20000H–37FFFH), and Main Memory Block 2 (00000H–1FFFFH). Each sector erase executes in ≤10 seconds and uses the same 6-cycle command format as chip erase, with sector address loaded in the final cycle.
AT49LV002T-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
AT49LV002T-12VC FAQ
1.How can I place an order for AT49LV002T-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002T-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 AT49LV002T-12VC reliable?
The price and inventory of AT49LV002T-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002T-12VC is usually 5 days.
3.What payment methods are accepted for AT49LV002T-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002T-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002T-12VC?
AT49LV002T-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002T-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 AT49LV002T-12VC?
For technical support, including AT49LV002T-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002T-12VC requirements.
6.How does Aetrix verify that AT49LV002T-12VC is sourced from the original manufacturer or authorized distributors?
All AT49LV002T-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 AT49LV002T-12VC meets industry standards.
7.What is the process for return or replacement of AT49LV002T-12VC?
All AT49LV002T-12VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002T-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 AT49LV002T-12VC part is unused and in its original packaging.
Return procedure for AT49LV002T-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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