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Microchip Technology AT49LV002N-90VI
- Part No.:
- AT49LV002N-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV002N-90VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,487
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Product details
Overview
AT49LV002N-90VI 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 90 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 boot loaders.
For engineers reviewing the AT49LV002N-90VI datasheet, AT49LV002N-90VI pinout, AT49LV002N-90VI application, or AT49LV002N-90VI equivalent, key selection criteria include its industrial temperature range (−40°C to +85°C), sector-based architecture with 16K-byte boot block lockout, DC/AC timing compliance per Rev. 0982D, and VSOP-32 (8 × 14 mm) package compatibility with legacy 32-pin Flash footprints.
Technical Context
This device operates as a standard parallel-interface Flash memory with EPROM-like read behavior using CE/OE/WE control lines and supports command-based byte programming, sector erase, and chip erase via six-cycle software sequences. Its internal program control logic eliminates external high-voltage requirements, enabling in-system reprogramming without dedicated programmers.
The AT49LV002N-90VI implements a fixed sector architecture: one 16K-byte boot block (address 00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K + 128K bytes). Boot block lockout is software-enabled and permanent once activated, and RESET pin functionality is omitted per N-suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - supports full firmware image storage for 8-bit/16-bit MCUs. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with 3.3 V system rails; no 5 V required for operation or programming. |
| Read Access Time | 90 ns max - meets timing for 11 MHz bus interfaces without wait states in industrial microcontrollers. |
| Erase Time | 10 seconds typical for full chip erase - enables rapid field firmware recovery without extended downtime. |
| Programming Speed | 30 µs/byte typical - allows efficient incremental updates of configuration data or patch tables. |
| Endurance | 10,000 program/erase cycles - validated for long-term use in programmable logic controllers and HMI firmware storage. |
| Operating Temperature | −40°C to +85°C - qualified for industrial automation, motor drives, and outdoor metering applications. |
Pinout & Package
AT49LV002N-90VI uses a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, 0.5 mm lead pitch, JEDEC MO-179 compliant. Pin 1 is index corner; pin 9 is NC (not connected).
| 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 sectors. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write operations; high-impedance during standby or reset. |
| 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; latches address/data on falling/rising edges per command cycle timing. |
| VCC | Power Supply | 3.0–3.6 V supply; decoupling capacitor required near pin for stable read/write margins. |
| GND | Ground Reference | Signal and power ground return; separate analog/digital grounding not required. |
| RESET | Reset Input | Not functional on N-suffix parts - pin is DC (no internal connection); must be tied to VCC or GND per layout. |
| DC | No Connect | Pin 9 is unconnected; must be left floating or grounded - no electrical or thermal function. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code after software-enable sequence. |
| Data Polling & Toggle Bit | Real-time program/erase completion detection via I/O7 complement or I/O6 toggling - eliminates need for fixed delay timers in host firmware. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes). |
| Sector Erase Flexibility | Independent erasure of two 8K-byte parameter blocks and two main memory blocks - enables selective firmware module updates without full chip erase. |
| Low Power Standby | 50 µA CMOS standby current - suitable for battery-backed systems requiring infrequent firmware access. |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing direct-mapped instruction/code execution and fast random-access parameter reads at 90 ns. Use Value: Industrial temperature rating (−40°C to +85°C) and 10,000-cycle endurance ensure multi-year reliability without field replacement. |
Use Scenario: Hosting secure boot code in microcontroller-based edge devices where bootloader integrity must be preserved across frequent application updates. IC Role / Device Role / Timing Role: Boot block-protected Flash memory with permanent lockout capability preventing corruption of critical startup routines. Use Value: 16K-byte boot block (00000H–03FFFH) and software-enabled lockout guarantee bootloader immutability after initial deployment. |
| Smart Meter Data Logging | Medical Device Configuration Storage |
Use Scenario: Retaining calibration coefficients, usage history, and tariff tables in ANSI C12.22-compliant electricity meters with tamper-resistant requirements. IC Role / Device Role / Timing Role: Sector-erasable Flash memory supporting independent update of parameter blocks without disturbing main firmware. Use Value: Two 8K-byte parameter blocks allow segregated storage of security keys and operational logs - simplifying FIPS 140-2 audit trails. |
Use Scenario: Storing FDA-regulated device settings, calibration offsets, and safety-critical configuration flags in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power (50 µA standby) Flash memory with hardware write protection ensuring data integrity during battery-only operation. Use Value: VCC-sense and noise-filtered WE/CE inputs prevent spurious writes during brown-out or ESD events - meeting IEC 60601-1 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-90-4C-NHE | 4 Mbit density (512K × 8), 90 ns access, 3.0–3.6 V, same VSOP-32 package but requires different command set and lacks boot block lockout. | Higher capacity suits larger firmware; no hardware-enforced boot protection - requires external MCU-level access control. | Select when >2 Mbit storage is needed and boot security is managed in software. |
| MX29LV002CTTI-90G | 2 Mbit, 90 ns, 3.0–3.6 V, TSOP-32 package; includes RESET pin and boot block lockout but uses different sector map (16K boot at top address). | RESET pin enables hardware reset coordination; top-address boot block (3C000H–3FFFFH) requires linker script adjustment vs. AT49LV002N-90VI's bottom-address layout. | Select when hardware reset integration is required and PCB layout allows TSOP footprint. |
Compared with SST39VF020-90-4C-NHE and MX29LV002CTTI-90G, the AT49LV002N-90VI offers deterministic bottom-address boot block placement and proven industrial qualification - making it optimal for cost-sensitive, legacy-compatible designs where pin-for-pin replacement isn't required but architectural consistency is critical.
Availability
AT49LV002N-90VI is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device manufacturing requiring stable component supply, long-lifecycle support, and traceable sourcing of legacy Flash memory.
Supply support for AT49LV002N-90VI 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 AT49LV002N-90VI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3 V–only embedded systems needing in-system reprogrammability, sector protection, and industrial-grade reliability without external high-voltage circuitry.
FAQ
What is the correct power supply range for AT49LV002N-90VI?
The AT49LV002N-90VI requires a regulated 3.0 V to 3.6 V supply (VCC). Operation below 3.0 V disables programming functions due to built-in VCC sense circuitry, and voltages above 3.6 V exceed absolute maximum ratings. This single-supply design eliminates need for 5 V or 12 V rails - unlike earlier 5 V Flash families. The AT49LV002N-90VI draws 25 mA active current and only 50 µA in CMOS standby mode.
Does AT49LV002N-90VI support hardware reset functionality?
No, the AT49LV002N-90VI does not support hardware reset. Per the "N" suffix designation and datasheet Rev. 0982D, the RESET pin is a DC (disconnected) terminal - it has no internal connection and must be left floating or tied to VCC/GND per PCB layout rules. Reset coordination must be handled entirely by the host microcontroller. This differs from T-suffix variants like AT49LV002T-90VI, which implement functional RESET.
How is the boot block protected on AT49LV002N-90VI?
The AT49LV002N-90VI features a 16K-byte boot block (addresses 00000H–03FFFH) with software-enabled programming lockout. Once activated via a six-cycle command sequence (5555H/AAh → 2AAAH/55h → 5555H/80h → 5555H/AAh → 2AAAH/55h → 5555H/40h), the boot block becomes permanently write-protected - even under full chip erase. The AT49LV002N-90VI provides no hardware override; RESET pin is non-functional, so protection is irreversible after enable.
What package type is used for AT49LV002N-90VI?
The AT49LV002N-90VI uses a 32-lead Very Small Outline Package (VSOP) measuring 8 mm × 14 mm, with 0.5 mm lead pitch and JEDEC MO-179 compliance. Pin 1 is marked by a notch or dot; pin 9 is NC (not connected). This package offers lower profile and better thermal performance than PDIP or PLCC variants, and is compatible with standard SMT reflow profiles for high-volume manufacturing.
Can AT49LV002N-90VI be used as a direct replacement for AT49BV002N-90VI?
No - AT49LV002N-90VI and AT49BV002N-90VI are not interchangeable. While both are 2 Mbit Flash memories in VSOP-32 packages, the AT49BV002N-90VI operates from 2.7 V to 3.6 V (wider voltage range), whereas the AT49LV002N-90VI is strictly 3.0 V to 3.6 V. Additionally, AC timing parameters differ: AT49BV002N-90VI specifies tACC = 90 ns at 2.7 V, while AT49LV002N-90VI guarantees 90 ns only at ≥3.0 V. System-level validation is required before substitution.
AT49LV002N-90VI 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:
- 90 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49LV002N-90VI FAQ
1.How can I place an order for AT49LV002N-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002N-90VI 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-90VI reliable?
The price and inventory of AT49LV002N-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002N-90VI is usually 5 days.
3.What payment methods are accepted for AT49LV002N-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002N-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002N-90VI?
AT49LV002N-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002N-90VI 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-90VI?
For technical support, including AT49LV002N-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002N-90VI requirements.
6.How does Aetrix verify that AT49LV002N-90VI is sourced from the original manufacturer or authorized distributors?
All AT49LV002N-90VI 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-90VI meets industry standards.
7.What is the process for return or replacement of AT49LV002N-90VI?
All AT49LV002N-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002N-90VI, 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-90VI part is unused and in its original packaging.
Return procedure for AT49LV002N-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV002N-90VI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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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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AT24C08C-STUM-T
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