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Microchip Technology AT49BV002N-90JI
- Part No.:
- AT49BV002N-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002N-90JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,544
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Product details
Overview
AT49BV002N-90JI from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply Flash memory IC designed for in-system reprogrammability in industrial embedded systems. It operates from 2.7–3.6 V, delivers 90 ns read access time, supports sector-erase architecture with 16K-byte boot block and two 8K-byte parameter blocks, and guarantees ≥10,000 write/erase cycles - enabling reliable firmware storage in programmable logic controllers and industrial HMI boot loaders.
For engineers reviewing the AT49BV002N-90JI datasheet, AT49BV002N-90JI pinout, AT49BV002N-90JI application, or AT49BV002N-90JI equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), PLCC-32 package compatibility, hardware data protection features, boot-block lockout capability, and byte-programming timing (30 µs typical).
Technical Context
The AT49BV002N-90JI implements a standard parallel Flash interface with CE/OE/WE control logic and internal command register-based programming. Its sector architecture separates boot code (16K bytes), parameter storage (2 × 8K bytes), and main memory (96K + 128K bytes), enabling selective erase without affecting protected firmware.
It uses standard microprocessor write timings and supports DATA polling (I/O7 complement) and Toggle Bit (I/O6) methods for program/erase cycle completion detection. The RESET pin is DC-connected (not functional for reset or boot override), distinguishing it from T-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full bootloader + configuration data in space-constrained industrial controllers. |
| Read Access Time | 90 ns max - ensures compatibility with 11 MHz bus timing in legacy microcontroller interfaces without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct connection to 3.3 V system rails without level-shifting or auxiliary regulators. |
| Write Cycle End Detection | DATA polling (I/O7) and Toggle Bit (I/O6) - eliminates need for fixed delay timers in firmware, improving programming reliability across voltage/temperature variation. |
| Endurance | ≥10,000 program/erase cycles - validated for field-upgradable firmware in devices requiring multi-year service life with periodic updates. |
| Power Dissipation | 25 mA active current / 50 µA CMOS standby - supports low-power operation in always-on industrial gateways during idle periods. |
| Operating Temperature | −40°C to +85°C - qualified for deployment in uncontrolled industrial enclosures, including factory automation and outdoor metering. |
Pinout & Package
AT49BV002N-90JI is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package with gull-wing leads, suitable for surface-mount reflow assembly and socketed prototyping. Pin 1 is marked by a notch on the package body.
| 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 of memory map. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; high-impedance when CE or OE is high, enabling shared bus operation without external transceivers. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access - provides hierarchical bus arbitration in multi-device systems. |
| OE | Output Enable | Active-low output control; allows read data to be gated independently of CE, preventing bus contention during partial decode scenarios. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - critical for reliable software-controlled erase/program execution. |
| RESET | Reset Input | DC-connected (no reset function); tied internally to VCC - eliminates need for external pull-up but disables hardware reset and boot override features present in T-suffix variants. |
| VCC | Power Supply | +2.7 V to +3.6 V supply; decoupling capacitor (0.1 µF ceramic) required within 10 mm for stable read/write operation. |
| GND | Ground | Reference return path for all I/O and core logic; requires low-inductance connection to system ground plane to minimize noise coupling during erase pulses. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte sector (00000H–03FFFH) can be permanently write-protected via command sequence - secures bootloader integrity against accidental overwrite during field firmware updates. |
| Sector-Erase Architecture | Independent erase of two 8K-byte parameter blocks and two main memory blocks (96K/128K) - enables modular firmware partitioning and wear leveling without full-chip erasure delays. |
| 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 or EMI events. |
| Fast Byte Programming | 30 µs typical per byte - reduces firmware update time in production programming and field service, especially for small patch deployments. |
| Industrial Temperature Range | −40°C to +85°C operation with guaranteed 90 ns access - ensures deterministic timing behavior in thermal cycling environments like motor drives and solar inverters. |
Applications
| Industrial PLC Firmware Storage | Embedded HMI Boot Loader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation lines with ambient temperatures up to 75°C. IC Role / Device Role / Timing Role: Nonvolatile program memory providing boot code execution and runtime parameter retention after power loss. Use Value: Sector-erase capability allows updating ladder logic without erasing I/O mapping tables; 10,000-cycle endurance supports >5 years of scheduled firmware revisions. |
Use Scenario: Hosting secure boot code and UI assets in human-machine interface terminals used in oil & gas control rooms with wide thermal swings. IC Role / Device Role / Timing Role: Primary boot memory mapped to CPU reset vector, delivering verified firmware before initializing display and communication peripherals. Use Value: Boot block lockout prevents corruption of startup routines during over-the-air updates; 90 ns access meets real-time boot timing budgets under worst-case voltage/temperature. |
| Smart Energy Meter Calibration Data | Medical Device Configuration Storage |
Use Scenario: Retaining calibration coefficients and tariff tables in ANSI C12.22-compliant electricity meters operating continuously at 65°C ambient. IC Role / Device Role / Timing Role: Parameter block memory storing infrequently modified metrology constants accessed during ADC initialization. Use Value: Two independent 8K-byte parameter blocks enable A/B calibration sets for field verification; 50 µA standby current minimizes battery drain in backup-powered meters. |
Use Scenario: Holding device-specific configuration profiles (e.g., alarm thresholds, sensor gain settings) in FDA-cleared portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-on self-test to restore last-known safe operational state. Use Value: Hardware data protection prevents unintended writes during ESD events common in clinical environments; industrial temp rating ensures reliability in sterilization storage conditions. |
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 | 3.0–3.6 V supply only; 90 ns access; 2 Mbit density; PLCC-32; no boot block lockout feature. | Lacks hardware-enforced boot sector protection; relies on software-only write inhibit schemes. | Select when boot security is managed externally and cost sensitivity outweighs lockout requirement. |
| MX29LV020TC-90G | 3.0–3.6 V supply; 90 ns access; 2 Mbit; PLCC-32; includes boot block (8K) with temporary lockout (requires VPP = 12 V to unlock). | Smaller boot sector (8K vs. 16K); lockout is not permanent - introduces risk of accidental unlock in noisy environments. | Choose if existing designs use MXIC's command set and require minimal layout change, accepting reduced boot sector size. |
Compared with SST39VF020-90-4C-NHE and MX29LV020TC-90G, the AT49BV002N-90JI provides larger (16K) permanently lockable boot memory and stricter hardware write inhibition - making it preferable for safety-critical industrial firmware where boot integrity is non-negotiable.
Availability
AT49BV002N-90JI is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device design requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for AT49BV002N-90JI 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 manufacturing, documentation, and technical assistance.
The AT49BV002N-90JI belongs to Atmel's Battery-Voltage™ Flash memory family, engineered for reliable in-system reprogramming in industrial and automotive-qualified applications where single-supply operation and data retention under thermal stress are critical.
FAQ
What is the operating temperature range for the AT49BV002N-90JI?
The AT49BV002N-90JI is rated for industrial operation from −40°C to +85°C. This range is validated across all electrical specifications including 90 ns read access time, 30 µs byte programming, and 10,000-cycle endurance - ensuring consistent performance in factory-floor and outdoor infrastructure deployments where ambient temperatures exceed commercial limits.
Does the AT49BV002N-90JI support hardware reset functionality?
No, the AT49BV002N-90JI does not support hardware reset. Its RESET pin is DC-connected (not functional), as explicitly stated in the datasheet note: "*This pin is a DC on the AT49BV002N(T) and AT49LV002N(T)." Unlike T-suffix variants, it lacks both reset assertion capability and 12 V boot override functionality - system-level reset must be handled externally.
How is boot block protection implemented in the AT49BV002N-90JI?
The AT49BV002N-90JI implements permanent boot block lockout via a six-command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once enabled, the 16K-byte boot sector (00000h–03FFFh) cannot be erased or programmed at ≤5.5 V - providing tamper-resistant firmware storage essential for certified industrial devices.
What package type is used for the AT49BV002N-90JI?
The AT49BV002N-90JI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package (package code 32J). It features a square body with J-shaped leads, notch-marked pin 1 orientation, and is compatible with standard PLCC sockets and reflow soldering profiles - commonly selected for prototyping and repair-friendly industrial PCBs.
Can the AT49BV002N-90JI be used as a drop-in replacement for the AT49BV002-90JI?
No - the AT49BV002N-90JI is not a drop-in replacement for the AT49BV002-90JI. While both share PLCC-32 packaging and 90 ns speed grade, the "N" suffix denotes the absence of RESET functionality (DC pin) versus the base part's functional RESET pin. Firmware relying on hardware reset or boot override will fail; PCB layout and system firmware must be verified for compatibility.
AT49BV002N-90JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV002N-90JI FAQ
1.How can I place an order for AT49BV002N-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002N-90JI 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 AT49BV002N-90JI reliable?
The price and inventory of AT49BV002N-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002N-90JI is usually 5 days.
3.What payment methods are accepted for AT49BV002N-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002N-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002N-90JI?
AT49BV002N-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002N-90JI 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 AT49BV002N-90JI?
For technical support, including AT49BV002N-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002N-90JI requirements.
6.How does Aetrix verify that AT49BV002N-90JI is sourced from the original manufacturer or authorized distributors?
All AT49BV002N-90JI 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 AT49BV002N-90JI meets industry standards.
7.What is the process for return or replacement of AT49BV002N-90JI?
All AT49BV002N-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002N-90JI, 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 AT49BV002N-90JI part is unused and in its original packaging.
Return procedure for AT49BV002N-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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