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Microchip Technology AT49BV002-90JI
- Part No.:
- AT49BV002-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002-90JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,502
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Product details
Overview
AT49BV002-90JI 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 70 ns read access time, supports byte-by-byte programming (30 µs/byte typical), features hardware data protection, and includes a 16 KB boot block with programmable lockout. It is used in firmware storage for microcontroller-based industrial controllers requiring field-upgradable code.
For engineers reviewing the AT49BV002-90JI datasheet, AT49BV002-90JI pinout, AT49BV002-90JI application, or AT49BV002-90JI equivalent, this page provides verified technical context, sector architecture details, industrial temperature operation (-40°C to +85°C), DC/AC timing parameters, and real-world use cases in boot code retention and parameter storage.
Technical Context
The AT49BV002-90JI implements a sector-erase Flash architecture with one 16 KB boot block, two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB). It uses standard CE/OE/WE control logic compatible with EPROM interfaces and supports command-based operations including chip erase, sector erase, and byte programming via six-cycle sequences.
It integrates internal program control and timers, DATA polling (I/O7 complement detection), and Toggle Bit (I/O6 toggling) for end-of-operation detection. Hardware protection includes VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and input state-dependent inhibit (OE low, CE high, or WE high blocks writes).
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 microcontrollers. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct battery-voltage operation without level-shifting in portable or backup-powered industrial systems. |
| Read Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces in legacy industrial controllers. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of configuration parameters without system downtime. |
| Erase Cycle Time | 10 seconds max (chip or sector) - enables predictable maintenance windows for firmware patching in deployed equipment. |
| Endurance | 10,000 write/erase cycles - ensures multi-year reliability in applications with periodic firmware upgrades. |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments including factory automation and outdoor metering. |
| Standby Current | 50 µA CMOS - minimizes power draw during sleep modes in battery-backed systems. |
Pinout & Package
AT49BV002-90JI is packaged in a 32-lead PLCC (Plastic Leaded Chip Carrier, package code 32J), surface-mountable with J-leads, suitable for reflow assembly and industrial thermal cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 select bytes, A17 selects upper/lower half in dual-block configurations. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables bus contention avoidance in shared-memory systems. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, allowing safe sharing of data bus with other peripherals. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence; critical for initiating programming/erase cycles. |
| I/O0–I/O7 | Data Input/Output | Bidirectional 8-bit data bus; carries command codes, addresses, and data during programming; outputs valid read data when CE/OE active. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; applying 12 V enables boot block override (not available on N-suffix variants). |
| VCC | Power Supply | 2.7–3.6 V supply; powers core logic and charge pumps; internal regulation supports consistent programming voltage across supply range. |
| GND | Ground | Reference return path for all signals and power; requires low-impedance connection to minimize noise coupling during erase/write transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code; lock enabled via 6-cycle command sequence. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggle provide software-detectable completion signals - eliminates need for fixed delay timers in host firmware. |
| Sector-Erase Architecture | Independent erasure of two 8 KB parameter blocks and two main memory blocks (96 KB/128 KB) enables granular updates without full-chip erase. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit prevent spurious writes - critical for reliability in electrically noisy industrial settings. |
| Single 2.7–3.6 V Operation | No external VPP or 5 V required for programming - simplifies power design and eliminates level-shifters in 3 V systems. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing boot loader and application firmware in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; 90 ns read access supports real-time scan cycle execution. Use Value: Enables remote firmware updates without hardware replacement; boot block lockout ensures bootloader integrity during field upgrades. |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and safety-critical configuration in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage with write endurance >10,000 cycles; sector-erase capability isolates calibration data from operational logs. Use Value: Guarantees data persistence across battery swaps and power loss; 50 µA standby current extends battery life in handheld units. |
| Automotive Body Control Module | Smart Energy Meter Boot Code |
Use Scenario: Holding vehicle-specific configuration tables and CAN protocol stacks in body control units operating across extended temperature ranges. IC Role / Device Role / Timing Role: Industrial-grade Flash memory (-40°C to +85°C); CE/OE/WE interface matches legacy MCU bus timing. Use Value: Meets automotive qualification requirements for long-term data retention and thermal robustness without derating. |
Use Scenario: Securing immutable boot code in utility-grade electricity meters subject to regulatory firmware validation. IC Role / Device Role / Timing Role: Boot block with hardware lockout (16 KB, 00000H–03FFFH); RESET-pin 12 V override enables authorized reprogramming. Use Value: Prevents unauthorized modification while allowing certified field service; supports regulatory audit trails for firmware integrity. |
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 | 2 Mbit, 3.3 V, 90 ns access, PLCC-32; lacks RESET-based boot override and has no dedicated boot block lockout command. | Requires external logic or firmware workarounds to protect boot sectors; less suited for safety-critical boot integrity. | Select when cost sensitivity outweighs boot security requirements and host controller can manage sector protection in software. |
| MX29LV002CTTI-90G | 2 Mbit, 3.0–3.6 V, 90 ns, TSOP-32; includes boot block protection but uses different command set (AMD-style) and lacks 12 V RESET override. | Compatible pinout only in TSOP; requires redesign for PLCC footprint; boot lockout is software-only with no hardware override path. | Choose for space-constrained designs using TSOP; verify command compatibility with existing bootloader before migration. |
Compared with SST39VF020-90-4C-NHE and MX29LV002CTTI-90G, the AT49BV002-90JI uniquely combines industrial temperature rating, PLCC-32 packaging, hardware-enforced boot block lockout, and 12 V RESET override - making it optimal for field-upgradable systems where bootloader integrity and serviceability are non-negotiable.
Availability
AT49BV002-90JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and smart energy meter boot code requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV002-90JI 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 AT49BV002-90JI belongs to Atmel's Battery-Voltage™ Flash family, engineered for reliable in-system reprogramming in resource-constrained industrial and embedded systems operating from single 3 V supplies.
FAQ
What is the operating temperature range for the AT49BV002-90JI?
The AT49BV002-90JI is rated for industrial operation from -40°C to +85°C. This range is confirmed in the ordering information table for the "-90JI" suffix and applies across all DC and AC specifications including read access time (90 ns max), programming, and erase cycles. The device maintains full functionality and data retention within this envelope without derating.
Does the AT49BV002-90JI support boot block protection, and how is it enabled?
Yes, the AT49BV002-90JI includes a 16 KB boot block (addresses 00000H–03FFFH) with programmable lockout. Protection is enabled by executing a precise six-cycle command sequence: load AAH at 5555H, 55H at 2AAAH, 80H at 5555H, then AAH/55H/40H at 5555H/2AAAH/5555H. Once activated, the boot block cannot be erased or programmed at ≤5.5 V.
Can the AT49BV002-90JI be reprogrammed in-system without high-voltage programming signals?
Yes, the AT49BV002-90JI performs all programming and erase operations using only its 2.7–3.6 V VCC supply - no external VPP or 5 V is required. Commands are issued via standard CE/OE/WE timing with specific address/data sequences, enabling true in-system reprogrammability through the host microcontroller's parallel bus.
What package type is used for the AT49BV002-90JI, and is it RoHS-compliant?
The AT49BV002-90JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as "32J" in Atmel's ordering matrix. While the original datasheet predates mandatory RoHS compliance, Microchip confirms that current production lots of AT49BV002-90JI meet RoHS Directive 2011/65/EU and are lead-free, with exemption 7a (Pb in high-melting-temperature solder).
How does the AT49BV002-90JI indicate completion of a byte programming cycle?
The AT49BV002-90JI supports two hardware methods: DATA polling (I/O7 returns complement of written data until completion, then true data) and Toggle Bit (I/O6 toggles between 0 and 1 during programming, then stabilizes). Both allow the host to detect completion dynamically without fixed delays - essential for deterministic firmware update routines in the AT49BV002-90JI.
AT49BV002-90JI 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)
AT49BV002-90JI FAQ
1.How can I place an order for AT49BV002-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002-90JI 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 AT49BV002-90JI reliable?
The price and inventory of AT49BV002-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002-90JI is usually 5 days.
3.What payment methods are accepted for AT49BV002-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002-90JI?
AT49BV002-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002-90JI 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 AT49BV002-90JI?
For technical support, including AT49BV002-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002-90JI requirements.
6.How does Aetrix verify that AT49BV002-90JI is sourced from the original manufacturer or authorized distributors?
All AT49BV002-90JI 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 AT49BV002-90JI meets industry standards.
7.What is the process for return or replacement of AT49BV002-90JI?
All AT49BV002-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002-90JI, 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 AT49BV002-90JI part is unused and in its original packaging.
Return procedure for AT49BV002-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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