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Microchip Technology AT49LV002N-12TI
- Part No.:
- AT49LV002N-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV002N-12TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,638
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Product details
Overview
AT49LV002N-12TI 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 120 ns read access time, 10-second chip erase, byte-programmable operation (30 µs/byte typical), and hardware data protection - enabling secure firmware updates in industrial controllers and legacy BIOS modules.
For engineers reviewing the AT49LV002N-12TI datasheet, AT49LV002N-12TI pinout, AT49LV002N-12TI application, or AT49LV002N-12TI equivalent, key selection considerations include its PLCC-32 package, boot-block write-protection capability, sector-based erase architecture (16K boot + two 8K parameter + two main memory blocks), and compatibility with standard EPROM-like CE/OE/WE control timing.
Technical Context
This device implements a CMOS-based Flash memory architecture with internal program control logic, DATA polling and toggle-bit status detection, and hardware VCC-sense programming inhibition. Its sector organization supports independent erasure of boot, parameter, and main memory blocks - critical for field-upgradable firmware with protected bootloader regions.
The AT49LV002N-12TI operates exclusively in 3.0–3.6V supply range and features a dedicated RESET pin (DC-connected, not functional for boot override), 50 µA CMOS standby current, and TTL/CMOS-compatible I/O levels. It uses standard 6-byte command sequences (e.g., 5555h/2AAAh/80h for lockout enable) without requiring high-voltage programming signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - sufficient for compact boot code and configuration data in space-constrained designs. |
| Read Access Time | 120 ns max - defines minimum bus cycle timing for CPU interface; compatible with 8 MHz Z80 or 16 MHz 80C188 systems. |
| Supply Voltage | 3.0 V to 3.6 V - eliminates need for 5 V rail; enables direct integration into 3.3 V logic domains without level translation. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables predictable firmware update windows in automated test and field service tools. |
| Byte Programming Time | 30 µs typical - supports efficient patching of individual configuration registers or calibration constants without block-level overhead. |
| End-of-Program Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6) - allows host processor to poll status without fixed delays or external timers. |
| Write Endurance | 10,000 program/erase cycles - ensures long-term reliability for devices updated quarterly or less frequently in industrial deployments. |
Pinout & Package
AT49LV002N-12TI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-bend leads, footprint-compatible with JEDEC MS-026AC. Pin 1 is marked by notch orientation; pin 1 is DC (Do Not Connect) per datasheet Rev. 0982D.
| 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 within 8-bit data bus. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for read, program, and command loading; electrically compatible with TTL/CMOS logic families. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output control; used with CE to gate data onto bus - enables shared bus arbitration and low-power output disable. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing - essential for reliable command entry. |
| RESET | Reset Input | DC-connected (not functional for boot override); forces outputs to high-Z and halts ongoing operations - used for system initialization and error recovery. |
| VCC | Power Supply | +3.0 V to +3.6 V supply input; decoupling capacitor (0.1 µF ceramic) required within 10 mm for stable read/write operation. |
| GND | Ground Reference | Signal and power ground reference; requires low-inductance connection to minimize noise during erase/program pulses. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16K-byte boot block (00000h–03FFFh) supports permanent write protection after lockout enable - secures bootloader integrity against accidental overwrite. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and control-line interlock (OE low/CE high/WE high blocks writes) - prevents spurious writes during power transients. |
| Standard Command Interface | 6-byte software command sequences (e.g., chip erase: 5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/10h) - eliminates need for external high-voltage generators or custom programmers. |
| Low-Power Operation | 25 mA active current and 50 µA CMOS standby current - reduces thermal load and extends battery life in portable or energy-sensitive applications. |
| Industrial Temperature Range | -40°C to +85°C operating case temperature - validated for use in programmable logic controllers, motor drives, and outdoor telemetry equipment. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Module |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in modular programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides 120 ns read access to support real-time scan-cycle execution. Use Value: Boot-block lockout prevents corruption of safety-critical startup routines during field firmware updates, ensuring deterministic system boot behavior. |
Use Scenario: Replacing obsolete 27C020 EPROMs in legacy desktop motherboard BIOS cartridges requiring field-upgradable firmware. IC Role / Device Role / Timing Role: Drop-in Flash replacement for 5 V EPROMs using 3.3 V supply; retains standard CE/OE/WE control interface and address mapping. Use Value: Eliminates need for 12 V programming voltage while maintaining compatibility with existing socketed BIOS layouts and update utilities. |
| Embedded Instrument Calibration Memory | Point-of-Sale Terminal Configuration Store |
Use Scenario: Holding sensor calibration coefficients and linearization tables in handheld multimeters and oscilloscopes subject to periodic recalibration. IC Role / Device Role / Timing Role: Byte-programmable nonvolatile memory; enables selective update of individual calibration parameters without erasing full firmware image. Use Value: 30 µs/byte programming time minimizes downtime during calibration lab procedures; sector erase isolates parameter blocks from application code. |
Use Scenario: Storing localized language packs, tax rate tables, and peripheral driver configurations in retail POS terminals deployed across multiple jurisdictions. IC Role / Device Role / Timing Role: Field-updatable configuration store with hardware write protection; supports remote firmware patches via USB or Ethernet. Use Value: Boot-block lockout ensures payment processing core remains unmodified while allowing safe, over-the-air updates to regional settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV002N-12TI | 2.7–3.6 V supply range; includes 2.7 V lower limit - supports wider brown-out tolerance and battery-backed operation. | Compatible with mixed 2.7 V/3.3 V systems; suitable where VCC may dip below 3.0 V during power-up or backup. | Select when system VCC regulation margin is tight or battery voltage decay must be accommodated without reset. |
| SST39VF020-120-3C-NHE | 3.0–3.6 V supply; 120 ns access; 32-pin TSOP package; no boot-block lockout - uses uniform 4K-sector erase only. | Lacks dedicated boot protection; requires external logic or firmware to manage bootloader integrity. | Choose for cost-sensitive, high-volume consumer applications where full-block erase suffices and layout space favors TSOP over PLCC. |
Compared with AT49BV002N-12TI and SST39VF020-120-3C-NHE, the AT49LV002N-12TI offers tighter voltage tolerance (3.0–3.6 V vs. 2.7–3.6 V or 3.0–3.6 V), guaranteed boot-block lockout, and PLCC packaging - making it optimal for industrial upgrades where pinout compatibility and firmware security are prioritized over package footprint.
Availability
AT49LV002N-12TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy BIOS replacement, and embedded instrument calibration requiring stable component supply across extended product lifecycles.
Supply support for AT49LV002N-12TI 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 the AT49LV series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial and automotive markets.
The AT49LV002N-12TI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3 V–only embedded systems requiring in-system reprogrammability, robust data retention, and hardware-level write protection without external high-voltage circuitry.
FAQ
What is the function of the RESET pin on the AT49LV002N-12TI?
The RESET pin on the AT49LV002N-12TI is a DC-connected (Do Not Connect) input per the datasheet. It forces outputs to high-impedance and halts ongoing operations when driven low, but does not support boot-block override functionality - unlike the 12 V–enabled RESET on BV-series variants. This design simplifies system integration by removing high-voltage requirements while retaining basic reset control for the AT49LV002N-12TI.
Does the AT49LV002N-12TI support true 3.3 V-only operation without 5 V or 12 V programming voltages?
Yes, the AT49LV002N-12TI operates entirely within 3.0–3.6 V and requires no external high-voltage programming signals. All commands - including chip erase, sector erase, byte programming, and boot-lockout enable - are executed using standard 3.3 V logic levels applied to CE, OE, WE, and address/data pins. This eliminates the need for charge pumps or external voltage boosters, simplifying PCB design and reducing BOM cost for the AT49LV002N-12TI.
How is boot-block write protection implemented on the AT49LV002N-12TI?
Boot-block write protection on the AT49LV002N-12TI is enabled via a six-cycle command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once activated, the 16K-byte boot sector (00000h–03FFFh) becomes permanently read-only under normal 3.3 V operation. Protection status can be verified by reading bit I/O0 at address 00002h in software identification mode - confirming lock state before field deployment of the AT49LV002N-12TI.
What package type is used for the AT49LV002N-12TI and is it pin-compatible with other AT49LV002N variants?
The AT49LV002N-12TI uses a 32-lead PLCC (Plastic Leaded Chip Carrier) package designated as 32J. It is fully pin-compatible with all other AT49LV002N-x-y variants (e.g., AT49LV002N-70JI, AT49LV002N-90TI) sharing the same 32J package code - enabling drop-in replacement across speed grades (-70, -90, -12) and temperature ranges (commercial/industrial) without PCB redesign for the AT49LV002N-12TI.
Can the AT49LV002N-12TI be used as a direct replacement for 27C020 EPROMs in legacy systems?
Yes, the AT49LV002N-12TI is functionally and pinout-compatible with 27C020 EPROMs in 32-pin DIP/PLCC packages, supporting identical 256K × 8 organization and CE/OE/WE control interface. Its 120 ns access time matches common -120 EPROMs, and it accepts standard EPROM programmer algorithms - enabling seamless retrofit into legacy systems without hardware modification, provided VCC is regulated to 3.3 V for the AT49LV002N-12TI.
AT49LV002N-12TI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49LV002N-12TI FAQ
1.How can I place an order for AT49LV002N-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002N-12TI 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-12TI reliable?
The price and inventory of AT49LV002N-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002N-12TI is usually 5 days.
3.What payment methods are accepted for AT49LV002N-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002N-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002N-12TI?
AT49LV002N-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002N-12TI 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-12TI?
For technical support, including AT49LV002N-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002N-12TI requirements.
6.How does Aetrix verify that AT49LV002N-12TI is sourced from the original manufacturer or authorized distributors?
All AT49LV002N-12TI 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-12TI meets industry standards.
7.What is the process for return or replacement of AT49LV002N-12TI?
All AT49LV002N-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002N-12TI, 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-12TI part is unused and in its original packaging.
Return procedure for AT49LV002N-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV002N-12TI Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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