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Microchip Technology AT49LV002T-12TC
- Part No.:
- AT49LV002T-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV002T-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,206
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Product details
Overview
AT49LV002T-12TC 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/data storage in embedded microcontroller boot systems. It delivers 120 ns read access time, 10-second chip erase, 30 µs/byte programming, 10,000 write cycles, and hardware data protection - enabling reliable firmware updates in industrial controllers and legacy instrumentation.
For engineers reviewing the AT49LV002T-12TC datasheet, AT49LV002T-12TC pinout, AT49LV002T-12TC application, or AT49LV002T-12TC equivalent, key selection criteria include boot block lockout behavior (3C000H–3FFFFH), sector architecture (16K boot + two 8K parameter + two main blocks), RESET-pin override capability (12V), and TSOP-32 package compatibility with legacy 8-bit bus interfaces.
Technical Context
The AT49LV002T-12TC implements a command-based Flash architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its internal program control logic eliminates external high-voltage generators, supporting standard 5V-compatible command timing on 3.3V-only power.
It features dual detection methods for operation completion: DATA polling (I/O7 complement toggle) and Toggle Bit (I/O6 state alternation), both usable at any point during programming or erasure - critical for real-time system supervision without dedicated status pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - supports full 8-bit parallel bus interfacing with legacy MCUs. |
| Read Access Time | 120 ns max - meets timing requirements for 8 MHz Z80, 8051, and 68K-based systems with no wait states. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with regulated 3.3V rails; no separate VPP required for programming. |
| Erase Time | 10 seconds typical for full chip erase - enables field firmware recovery within defined maintenance windows. |
| Programming Speed | 30 µs/byte typical - allows rapid patching of small code sections without disrupting system operation. |
| Endurance | 10,000 program/erase cycles - validated for repeated bootloader updates over product lifetime. |
| Boot Block Protection | 16K-byte sector (3C000H–3FFFFH) with lockout enabled via 6-byte command sequence - prevents accidental overwrite of secure startup code. |
Pinout & Package
AT49LV002T-12TC is supplied in a 32-lead Thin Small Outline Package (TSOP Type I, 8 mm × 20 mm), pin-compatible with industry-standard 32-pin Flash memory footprints. The package supports surface-mount reflow assembly and operates across -40°C to +85°C industrial temperature range.
| 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 | 8-bit bidirectional data bus; latched on rising edge of WE/CE for programming, driven during read with standard EPROM timing. |
| 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; places I/O pins in high-impedance state when high - essential for multi-device data bus arbitration. |
| WE | Write Enable | Active-low write strobe; initiates command latching on falling edge and data capture on rising edge per standard microprocessor write cycle. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12V input enables boot block reprogramming even when lockout is active. |
| VCC | Power Supply | +3.0V to +3.6V supply; powers all internal logic and charge pumps - no auxiliary voltage required. |
| GND | Ground | Reference return path for all signals and power; requires low-inductance connection to minimize noise during erase/write transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | One 16K-byte boot block (3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K/128K) - enables granular firmware partitioning and safe field updates. |
| Hardware Data Protection | VCC sense (<1.8V inhibits programming), noise filtering (<15 ns pulse rejection), and control-line interlock (OE low/CE high/WE high blocks writes) - prevents spurious writes in electrically noisy environments. |
| Boot Block Lockout Override | 12V applied to RESET pin during erase/program operations disables lockout - provides emergency recovery path without hardware modification. |
| DATA Polling & Toggle Bit | I/O7 complement detection and I/O6 toggling provide software-controllable, pin-efficient operation status - eliminates need for external ready/busy signals. |
| CMOS Standby Current | 50 µA max at VCC = 3.6V - reduces power consumption in battery-backed or energy-sensitive applications during idle periods. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; 120 ns read access ensures deterministic instruction fetch timing for real-time scan cycles. Use Value: Sector-protected boot block prevents corruption of safety-critical startup routines during remote firmware upgrades over Modbus or CANopen. | Use Scenario: Hosting boot code and configuration parameters in 8-bit microcontroller-based medical instruments requiring regulatory-compliant firmware traceability. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; supports hardware/software product identification (08H device code) for version verification. Use Value: 10,000-cycle endurance and 3.0–3.6V single supply simplify power design and meet long-term field service requirements without recalibration. |
| Automotive Diagnostic Tool Memory | Point-of-Sale Terminal Configuration Storage |
Use Scenario: Storing OBD-II protocol stacks and vehicle-specific calibration tables in handheld diagnostic scanners subjected to thermal cycling and vibration. IC Role / Device Role / Timing Role: Parameter block storage (3A000H–3BFFFH and 38000H–39FFFH) for user-modifiable settings; RESET-driven 12V override enables service-mode reflash. Use Value: Fast 10-second chip erase allows complete tool software restoration in under 15 seconds during bench servicing. | Use Scenario: Retaining tax rate tables, language packs, and merchant-specific configurations in retail terminals deployed globally with varying ambient conditions. IC Role / Device Role / Timing Role: Dual-main-block architecture (20000H–37FFFH and 00000H–1FFFFH) enables A/B firmware swapping for zero-downtime updates. Use Value: 50 µA CMOS standby current extends battery backup life beyond 5 years in mains-failed scenarios. |
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 | 4 Mbit (512K × 8), 70 ns access, 3.0–3.6V, same TSOP-32 package but different command set and sector map (32 × 64K). | Larger capacity suits applications needing expanded parameter space; lacks 12V RESET override for boot block unlock. | Select when higher density and faster read speed are prioritized over boot-sector recovery flexibility. |
| MX29LV002CTTI-12 | 2 Mbit (256K × 8), 120 ns access, 3.0–3.6V, TSOP-32, identical sector layout but uses different unlock bypass (no 12V RESET method). | Same boot block size (16K) and timing; requires alternate command sequence for lockout disable - incompatible with existing Atmel firmware drivers. | Choose only if migrating legacy designs where hardware RESET pin routing cannot support 12V transient generation. |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49LV002T-12TC uniquely combines verified 12V RESET-based boot block override, documented 10,000-cycle endurance, and exact sector address mapping (3C000H–3FFFFH) - making it irreplaceable in safety-critical boot memory roles requiring guaranteed recovery paths.
Availability
AT49LV002T-12TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded bootloader memory, automotive diagnostic tool memory, and point-of-sale terminal configuration storage requiring stable component supply across extended product lifecycles.
Supply support for AT49LV002T-12TC 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. The company specializes in high-reliability microcontrollers, analog, and nonvolatile memory solutions for industrial and automotive markets.
The AT49LV002T-12TC belongs to Atmel's legacy Battery-Voltage™ Flash family, designed specifically for 3.3V embedded systems requiring in-system reprogrammability without high-voltage programming infrastructure - targeting cost-sensitive, long-lifecycle applications.
FAQ
What is the boot block address range for AT49LV002T-12TC?
The boot block address range for AT49LV002T-12TC is 3C000H to 3FFFFH (16 Kbytes). This differs from the base AT49LV002(N) variant, which uses 00000H–03FFFH. The relocated boot sector enables flexible memory mapping in systems where lower addresses are reserved for RAM or peripherals. This address range is fixed and cannot be remapped in the AT49LV002T-12TC.
Does AT49LV002T-12TC support 12V programming voltage?
No, AT49LV002T-12TC operates exclusively from a 3.0–3.6V supply and does not require or accept 12V on VCC or programming pins. However, a 12V ±0.5V signal applied to the RESET pin enables boot block reprogramming even after lockout activation - this is a dedicated override function, not a programming voltage rail.
How many program/erase cycles is AT49LV002T-12TC rated for?
AT49LV002T-12TC is rated for a minimum of 10,000 program/erase cycles per memory location, as specified in the official datasheet (Rev. 0982D–FLASH–02/03). This endurance rating applies across the full industrial temperature range (-40°C to +85°C) and is validated using standard JEDEC test methodologies.
What package type is used for AT49LV002T-12TC?
AT49LV002T-12TC is packaged in a 32-lead Thin Small Outline Package (TSOP Type I, 8 mm × 20 mm), designated as package code "32T" in Atmel/Microchip ordering nomenclature. This surface-mount package complies with JEDEC MO-152 standards and is compatible with automated SMT assembly processes.
Can AT49LV002T-12TC be used as a direct replacement for AT49BV002T-12TC?
No, AT49LV002T-12TC is not a direct replacement for AT49BV002T-12TC due to differing supply voltage ranges: AT49LV002T-12TC requires 3.0–3.6V, while AT49BV002T-12TC supports 2.7–3.6V. Although pinout and timing are identical, the lower 2.7V threshold of the BV variant enables operation in brown-out or battery-depleted conditions where the LV part would fail.
AT49LV002T-12TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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-TSOP
AT49LV002T-12TC FAQ
1.How can I place an order for AT49LV002T-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002T-12TC 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-12TC reliable?
The price and inventory of AT49LV002T-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002T-12TC is usually 5 days.
3.What payment methods are accepted for AT49LV002T-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002T-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002T-12TC?
AT49LV002T-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002T-12TC 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-12TC?
For technical support, including AT49LV002T-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002T-12TC requirements.
6.How does Aetrix verify that AT49LV002T-12TC is sourced from the original manufacturer or authorized distributors?
All AT49LV002T-12TC 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-12TC meets industry standards.
7.What is the process for return or replacement of AT49LV002T-12TC?
All AT49LV002T-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002T-12TC, 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-12TC part is unused and in its original packaging.
Return procedure for AT49LV002T-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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