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Microchip Technology AT49LV002NT-12TI
- Part No.:
- AT49LV002NT-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV002NT-12TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,362
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Product details
Overview
AT49LV002NT-12TI 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 s chip erase time, byte-programmable architecture with 30 µs/byte typical programming, and hardware data protection - enabling secure boot code retention in industrial control firmware updates.
For engineers reviewing the AT49LV002NT-12TI datasheet, AT49LV002NT-12TI pinout, AT49LV002NT-12TI application, or AT49LV002NT-12TI equivalent, key selection criteria include its 32-pin PLCC package, boot block lockout capability (3C000H–3FFFFH), sector-erasable architecture (two 8K parameter blocks + two main memory blocks), and compatibility with standard EPROM read timing and 5V-command programming protocol.
Technical Context
This device implements a command-based Flash memory architecture requiring six-byte software sequences for chip/sector erase and boot lockout enablement. Its internal logic supports DATA polling (I/O7 complement) and toggle-bit detection (I/O6) to signal program/erase completion without external timing dependencies.
The AT49LV002NT-12TI features dual-voltage operation support (3.0–3.6 V only), CMOS standby current ≤50 µA, active current ≤25 mA, and hardware safeguards including VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low / CE high / WE high blocks writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - directly replaces 27C020 EPROMs in legacy 8-bit bus systems. |
| Read Access Time | 120 ns max - meets timing requirements for 8 MHz Z80, 68K, and early ARM7-based controllers with no wait states. |
| Supply Voltage | 3.0 V to 3.6 V only - eliminates need for 5 V programming voltage; compatible with modern low-voltage microcontroller I/O domains. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables field firmware updates within defined maintenance windows. |
| Byte Programming Time | 30 µs typical - supports incremental configuration updates without system reset or long blocking delays. |
| End-of-Program Detection | DATA polling (I/O7 complement) or toggle-bit (I/O6) - allows deterministic host software synchronization without fixed timeouts. |
| Boot Block Protection | 16 KB sector at 3C000H–3FFFFH with lockout override via 12 V on RESET - secures bootloader integrity while permitting runtime parameter updates elsewhere. |
Pinout & Package
AT49LV002NT-12TI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package (package code 32J), with lead pitch 1.27 mm and body size 11.43 mm × 11.43 mm. Pin 1 is index corner, counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A14 used for sector commands per datasheet. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables bus contention avoidance. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high - critical for shared data bus isolation. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing; inhibits writes if held high. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; carries command data, program data, and read outputs; supports DATA polling on I/O7 and toggle-bit on I/O6. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override - not available on N(T) variants. |
| VCC | Power Supply | +3.0 V to +3.6 V supply; powers core logic and I/O buffers; requires local 0.1 µF decoupling per datasheet layout guidelines. |
| GND | Ground | Reference return path for all signals and power; must be low-inductance connection to minimize noise during erase/program cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | One 16 KB boot block (3C000H–3FFFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB + 128 KB) - enables granular firmware partitioning and safe over-the-air updates. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibition prevent accidental writes during power transients or EMI events - essential for unattended industrial deployments. |
| Boot Block Lockout | Software-enabled permanent write protection of boot sector; lockout status detectable via software product ID mode at address 3C002H - ensures bootloader immutability. |
| DC Characteristics Compliance | CMOS standby current ≤50 µA and active current ≤25 mA - meets low-power requirements for battery-backed or energy-constrained embedded nodes. |
| Command-Based Operation | No external high-voltage programming required; all functions executed via 5 V-compatible command sequences on standard microprocessor bus - simplifies system-level design. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
Use Scenario: Storing and updating firmware for programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides 120 ns read timing for real-time scan-cycle execution and 10 s erase for scheduled firmware patches. Use Value: Sector-erasable architecture isolates boot code (protected) from application code (field-updatable), reducing risk of bricking during remote updates. |
Use Scenario: Securing bootloader and calibration data in Class II medical instruments requiring regulatory-compliant firmware integrity and audit trails. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection; 3.0–3.6 V operation aligns with isolated low-voltage power domains in safety-critical subsystems. Use Value: Boot block lockout prevents unauthorized modification of startup routines; 12 V RESET override allows authorized service-mode reprogramming under controlled conditions. |
| Legacy Embedded System Replacement | Automotive Diagnostic Module Memory |
Use Scenario: Drop-in replacement for obsolete 27C020 EPROMs in legacy 8-bit microcontroller designs where UV-erasable parts are no longer available or supported. IC Role / Device Role / Timing Role: Pin- and function-compatible Flash alternative; matches EPROM read timing (CE/OE-controlled) and supports same address/data bus protocols. Use Value: Eliminates need for UV erasers and programmers; enables in-field firmware correction without board removal or socket replacement. |
Use Scenario: Storing diagnostic firmware and vehicle-specific configuration tables in OBD-II modules deployed across automotive temperature ranges (−40°C to +85°C). IC Role / Device Role / Timing Role: Industrial-grade Flash memory with guaranteed operation up to +85°C case temperature; supports robust command sequencing under automotive EMI conditions. Use Value: Hardware data protection (noise filtering, VCC sense) prevents corruption during load dump or cranking events; sector erase minimizes update downtime. |
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, 70 ns access, 2 Mbit, 32-pin TSOP; lacks RESET-based boot override and has different command set. | TSOP package only; no PLCC option; no 12 V boot unlock - limits field-service flexibility in legacy PLCC-based designs. | Select when board space is constrained and PLCC footprint is not required; verify command compatibility before firmware porting. |
| MX29LV002CTT-12G | 3.0–3.6 V, 120 ns, 2 Mbit, 32-pin PLCC; includes boot block but uses different lockout mechanism and no RESET override. | Same package and timing; however, boot protection is enabled via software command only - no hardware fallback for recovery. | Choose for cost-sensitive industrial applications where boot block override is not mandated by service policy. |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTT-12G, the AT49LV002NT-12TI uniquely combines PLCC packaging, 12 V RESET-based boot override, and Atmel's proven command-set compatibility with legacy EPROM-based toolchains - making it the preferred choice for maintaining and extending aging embedded platforms.
Availability
AT49LV002NT-12TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader retention, and legacy embedded system replacement requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV002NT-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 documentation, reliability data, and cross-reference tools.
The AT49LV002NT-12TI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in resource-constrained 8-bit and 16-bit embedded systems where low-voltage operation and boot code security are critical.
FAQ
What is the operating voltage range for the AT49LV002NT-12TI?
The AT49LV002NT-12TI operates exclusively within 3.0 V to 3.6 V. Unlike BV-series variants, it does not support 2.7 V operation. This narrow range ensures compatibility with modern 3.3 V logic families and eliminates ambiguity in power rail design - a key requirement for AT49LV002NT-12TI integration into tightly regulated embedded power domains.
Does the AT49LV002NT-12TI support in-system programming without external high-voltage supplies?
Yes, the AT49LV002NT-12TI performs all programming and erase operations using only its VCC supply (3.0–3.6 V) and standard 5 V-compatible command sequences. No external 12 V or higher programming voltage is needed - a defining feature of AT49LV002NT-12TI that simplifies system-level design and eliminates dedicated HV circuitry.
How is boot block protection implemented on the AT49LV002NT-12TI?
The AT49LV002NT-12TI reserves addresses 3C000H–3FFFFH as a 16 KB boot block. Protection is enabled via a six-cycle software command sequence; once activated, writes/erases to this region are blocked at ≤5.5 V. The AT49LV002NT-12TI further supports 12 V applied to RESET to temporarily override lockout - a unique recovery mechanism not found in most competing Flash devices.
What package type is used for the AT49LV002NT-12TI?
The AT49LV002NT-12TI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package (32J), with dimensions 11.43 mm × 11.43 mm and 1.27 mm lead pitch. This package provides robust thermal and mechanical performance for industrial reflow and hand-soldering, and is pin-compatible with legacy EPROM sockets - a critical advantage for AT49LV002NT-12TI in retrofit applications.
Can the AT49LV002NT-12TI be used as a direct replacement for the AT29LV002?
No - the AT49LV002NT-12TI and AT29LV002 are not pin- or command-compatible. While both are 2 Mbit 3.3 V Flash memories, the AT49LV002NT-12TI uses Atmel's proprietary command set and sector map (e.g., boot block at 3C000H), whereas AT29LV002 follows AMD/Fujitsu conventions. Firmware and hardware validation is required before substituting AT49LV002NT-12TI for AT29LV002.
AT49LV002NT-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
AT49LV002NT-12TI FAQ
1.How can I place an order for AT49LV002NT-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002NT-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 AT49LV002NT-12TI reliable?
The price and inventory of AT49LV002NT-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002NT-12TI is usually 5 days.
3.What payment methods are accepted for AT49LV002NT-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002NT-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002NT-12TI?
AT49LV002NT-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002NT-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 AT49LV002NT-12TI?
For technical support, including AT49LV002NT-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002NT-12TI requirements.
6.How does Aetrix verify that AT49LV002NT-12TI is sourced from the original manufacturer or authorized distributors?
All AT49LV002NT-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 AT49LV002NT-12TI meets industry standards.
7.What is the process for return or replacement of AT49LV002NT-12TI?
All AT49LV002NT-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002NT-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 AT49LV002NT-12TI part is unused and in its original packaging.
Return procedure for AT49LV002NT-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV002NT-12TI Tags
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