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Microchip Technology AT49BV002T-90JI
- Part No.:
- AT49BV002T-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002T-90JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,646
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Product details
Overview
AT49BV002T-90JI from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 90 ns read access time, 10-second chip erase cycle, and sector-based architecture including a 16 KB boot block (address range 3C000H–3FFFFH) with programmable lockout. It is used for firmware storage and boot code retention in industrial microcontroller systems.
For engineers reviewing the AT49BV002T-90JI datasheet, AT49BV002T-90JI pinout, AT49BV002T-90JI application, or AT49BV002T-90JI equivalent, key selection criteria include industrial temperature support (−40°C to +85°C), PLCC-32 package compatibility, boot block protection via RESET-pin override (12 V), DATA polling/Toggle Bit end-of-write detection, and byte-programmable flash with 10,000 write cycles.
Technical Context
The AT49BV002T-90JI implements a standard parallel Flash interface with CE/OE/WE control logic and supports hardware reset-driven boot block reprogramming at 12 V. Its internal command register executes six-cycle sequences for chip/sector erase and four-cycle sequences for byte programming without external high-voltage circuitry.
It features dual erase modes - full-chip erase (excluding locked boot block) and sector erase across two 8 KB parameter blocks and two main memory blocks (96 KB and 128 KB). The boot block resides at top of address space (3C000H–3FFFFH), distinct from the base-address boot block in non-T variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 90 ns - determines maximum bus clock rate for reliable read operations |
| Supply Voltage | 2.7 V to 3.6 V - enables direct connection to 3.3 V logic rails without level shifting |
| Erase Cycle Time | 10 seconds - defines minimum time between successive erase commands |
| Byte Programming Time | 30 µs typical - sets throughput limit for field firmware updates |
| Write End Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed timing delays in host firmware |
| Endurance | 10,000 program/erase cycles - specifies lifetime under repeated field update scenarios |
| Operating Temperature | −40°C to +85°C - qualifies for industrial-grade embedded applications |
Pinout & Package
AT49BV002T-90JI is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package with standard JEDEC outline and pin 1 index mark. 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 (218 = 262,144) |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for read, program, and identification operations |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read output |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low control for programming and erase command latching |
| RESET* | Hardware Reset / Boot Override | Logic-high enables normal operation; 12 V pulse overrides boot block lockout during erase/program |
| VCC | Power Supply | 2.7–3.6 V supply input; powers core logic and I/O buffers |
| GND | Ground Reference | Signal and power return reference for all inputs, outputs, and internal circuitry |
| DC | No Connect | Pin 1 is unconnected; must remain floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB top-sector (3C000H–3FFFFH) programmable write protection prevents accidental overwrite of critical boot code |
| 12 V RESET Override | Applying 12 V ± 0.5 V to RESET pin temporarily disables boot block lockout during chip/sector erase or byte program |
| 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) |
| Software Product Identification | Manufacturer code 1FH and device code 08H readable via 3-cycle software command sequence for automated BOM verification |
| CMOS Standby Current | 50 µA max - enables ultra-low-power retention in battery-backed or energy-constrained systems |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing fast 90 ns read access for real-time instruction fetch and secure boot block protection against corruption during field updates. Use Value: Enables safe in-system reprogramming without removing the device; 10,000-cycle endurance supports multi-year field maintenance cycles. | Use Scenario: Holding certified bootloader code in Class II medical equipment requiring traceable, tamper-resistant firmware startup routines. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced write lock on 16 KB top sector (3C000H–3FFFFH), verified via software product ID (code 08H). Use Value: Prevents unauthorized modification of boot code while allowing field-upgradable application partitions; RESET-pin 12 V override supports authorized recovery procedures. |
| Telecom Edge Node Configuration | Automotive Diagnostic Module Code Storage |
Use Scenario: Storing calibration tables and protocol stacks in remote telecom access nodes deployed in uncontrolled ambient conditions. IC Role / Device Role / Timing Role: Industrial-temperature (−40°C to +85°C) Flash memory with DATA polling and Toggle Bit for robust write completion detection in noisy EMI environments. Use Value: Eliminates need for fixed timeout delays in host firmware; 50 µA standby current extends uptime in solar-powered deployments. | Use Scenario: Hosting diagnostic application firmware in OBD-II modules subject to automotive thermal cycling and vibration. IC Role / Device Role / Timing Role: Parallel-interface Flash with sector-erasable architecture (two 8 KB parameter blocks + two main memory blocks) enabling modular firmware updates. Use Value: Allows independent erasure of parameter sectors without disturbing boot code or main application image-reducing update risk and downtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-90-4C-NHE | 3.0–3.6 V supply only; no 2.7 V operation; identical 2 Mbit density, 90 ns access, PLCC-32 package | Lacks boot block lockout override via RESET pin; uses different command set for sector erase | Select when 2.7 V operation is unnecessary and legacy SST39VF command compatibility is required |
| MX29LV020TC-90G | 3.0–3.6 V supply; 90 ns access; same 2 Mbit density and PLCC-32 footprint but different sector map (32 KB uniform sectors) | No dedicated boot block; protection implemented via status register, not hardware RESET override | Select when uniform sector sizing simplifies firmware partitioning and 12 V override is not needed |
Compared with SST39VF020-90-4C-NHE and MX29LV020TC-90G, the AT49BV002T-90JI uniquely provides 2.7 V operation, top-aligned 16 KB boot block with 12 V RESET override, and Atmel-specific command compatibility-making it optimal for legacy industrial designs requiring guaranteed boot integrity and low-voltage flexibility.
Availability
AT49BV002T-90JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader retention, and telecom edge node configuration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV002T-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 the AT49BV series.
The AT49BV002T-90JI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in industrial and embedded systems where low-voltage operation and boot code security are critical.
FAQ
What is the boot block address range for AT49BV002T-90JI?
The boot block for AT49BV002T-90JI occupies addresses 3C000H to 3FFFFH (16 KB), located at the top of the 256K-word memory map. This differs from non-T variants (e.g., AT49BV002-90JI), which place the boot block at 00000H–03FFFH. The top-aligned location simplifies linker script configuration for modern bootloaders that expect firmware at upper memory boundaries.
Does AT49BV002T-90JI support 2.7 V operation?
Yes, AT49BV002T-90JI supports a supply voltage range of 2.7 V to 3.6 V, enabling direct integration with 2.7–3.3 V system rails without regulators or level shifters. This is a key distinction from the AT49LV002T-90JI variant, which requires 3.0–3.6 V and cannot operate below 3.0 V.
How is boot block lockout overridden on AT49BV002T-90JI?
Boot block lockout on AT49BV002T-90JI is overridden by applying 12.0 V ± 0.5 V to the RESET pin during chip erase, sector erase, or byte programming operations. Once RESET returns to TTL levels, lockout reactivates. This feature is absent in AT49BV002N(T) variants, where the boot block becomes permanently immutable after lockout enable.
What package type is used for AT49BV002T-90JI?
AT49BV002T-90JI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package (package code 32J). Pin 1 is designated DC (Do Not Connect), consistent with the AT49BV/LV002(N)(T) family specification. The PLCC format provides robust mechanical mounting and thermal performance for industrial PCB assemblies.
What are the endurance and data retention specifications for AT49BV002T-90JI?
AT49BV002T-90JI guarantees a minimum of 10,000 program/erase cycles and 10-year data retention at 85°C. These values are validated per JEDEC standards and apply across the full industrial temperature range (−40°C to +85°C), ensuring reliability in demanding embedded deployments where field updates occur infrequently but must remain trustworthy over product lifetime.
AT49BV002T-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)
AT49BV002T-90JI FAQ
1.How can I place an order for AT49BV002T-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002T-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 AT49BV002T-90JI reliable?
The price and inventory of AT49BV002T-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002T-90JI is usually 5 days.
3.What payment methods are accepted for AT49BV002T-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002T-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002T-90JI?
AT49BV002T-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002T-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 AT49BV002T-90JI?
For technical support, including AT49BV002T-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002T-90JI requirements.
6.How does Aetrix verify that AT49BV002T-90JI is sourced from the original manufacturer or authorized distributors?
All AT49BV002T-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 AT49BV002T-90JI meets industry standards.
7.What is the process for return or replacement of AT49BV002T-90JI?
All AT49BV002T-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002T-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 AT49BV002T-90JI part is unused and in its original packaging.
Return procedure for AT49BV002T-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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