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Microchip Technology AT49BV002-12JC
- Part No.:
- AT49BV002-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV002-12JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,077
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Product details
Overview
AT49BV002-12JC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 3V-only Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across 0°C to 70°C commercial temperature range in PLCC-32 package.
For engineers reviewing the AT49BV002-12JC datasheet, AT49BV002-12JC pinout, AT49BV002-12JC application, or AT49BV002-12JC equivalent, this page delivers verified electrical specs, boot-block lockout behavior, DC/AC timing parameters, hardware reset override capability, and real-world use cases in firmware update and secure boot subsystems.
Technical Context
The AT49BV002-12JC implements a standard parallel Flash interface with CE/OE/WE control logic and supports EPROM-like read operation plus command-based programming and erasure. Its internal architecture includes a 16KB boot block with programmable lockout, two 8KB parameter blocks, and two main memory blocks (96KB + 128KB), enabling flexible firmware partitioning.
It uses five-volt-compatible command sequences (e.g., 5555h/2AAAh addressing) for chip/sector erase and byte programming, with DATA polling (I/O7 complement) and Toggle Bit (I/O6) for cycle completion detection. Hardware data protection includes VCC sense, noise filtering on WE/CE, and write inhibit via control pin states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8 bits), organized as 262,144 words × 8 |
| Supply Voltage | 2.7 V to 3.6 V - enables direct battery-powered operation without level-shifting |
| Read Access Time | 120 ns - defines maximum sustained read throughput in microprocessor bus cycles |
| Byte Programming Time | 30 µs typical - determines minimum latency per byte during firmware patching |
| Erase Cycle Time | 10 seconds max - sets worst-case delay for full-chip or sector reinitialization |
| Endurance | 10,000 program/erase cycles - specifies field lifetime under frequent update scenarios |
| Standby Current | 50 µA CMOS - ensures ultra-low power retention in sleep-mode embedded systems |
Pinout & Package
AT49BV002-12JC is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package with J-leads, compatible with standard surface-mount reflow profiles and socketed programming fixtures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing space |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus for read/write operations and command loading |
| 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; prevents bus contention when high during read cycles |
| WE | Write Enable | Active-low write strobe; latches address/data during command and programming sequences |
| RESET | Hardware Reset | Active-low reset input; enables boot block override at 12 V (not available on N/T variants) |
| VCC | Power Supply | +2.7 V to +3.6 V supply; powers core logic and I/O buffers |
| GND | Ground | Reference return path for all signals and power domains |
| DC | Don't Connect | No internal connection; must remain unconnected per datasheet (pin 1 in PLCC) |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (00000h–03FFFh) prevents accidental overwrite of bootloader code |
| Hardware Boot Override | 12 V applied to RESET pin allows reprogramming of locked boot block during erase/program |
| Sector-Erasable Architecture | Independent erasure of two 8 KB parameter blocks and two main memory blocks (96 KB / 128 KB) |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide software-controlled, bus-compatible erase/program status detection |
| Low-Voltage Command Interface | Standard 5 V-level command sequences (e.g., 5555h/2AAAh) eliminate need for external voltage translators |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing field-upgradable firmware in programmable logic controllers with watchdog-triggered recovery. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-erase granularity for safe dual-bank firmware updates. Use Value: Boot block lockout ensures bootloader integrity while parameter blocks store calibration data updated independently. |
Use Scenario: Securing certified boot code in FDA-regulated diagnostic equipment requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Trusted execution environment anchor storing signed bootloader images with hardware-enforced write protection. Use Value: 12 V RESET override enables authorized reflash of boot code during service without board removal. |
| Automotive ECU Parameter Calibration | Networking Equipment Configuration Storage |
Use Scenario: Retaining vehicle-specific tuning maps and sensor compensation tables across ignition cycles in engine control units. IC Role / Device Role / Timing Role: High-reliability parameter memory with 10,000-cycle endurance and -40°C to +85°C industrial grade support. Use Value: Two independent 8 KB parameter blocks allow A/B swapping for atomic configuration updates without runtime corruption. |
Use Scenario: Holding persistent switch/router configuration, MAC addresses, and security keys in enterprise-grade networking hardware. IC Role / Device Role / Timing Role: Secure, low-power nonvolatile storage interfaced directly to ARM/MIPS host processors via parallel bus. Use Value: 50 µA standby current extends uptime in fanless, thermally constrained chassis during idle periods. |
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 (3.0–3.6 V), 70 ns access, same 2 Mbit density and PLCC-32 package | Lacks hardware RESET override for boot block; uses different command set (no 12 V unlock) | Preferred where simplified command protocol suffices and boot block reflash is handled externally |
| MX29LV002CTTI-12 | 3.3 V operation, 120 ns access, 2 Mbit density, TSOP-32 package (not PLCC) | Includes CFI-compliant command set but no dedicated boot block lockout feature | Chosen for space-constrained designs accepting TSOP footprint and trading boot security for JEDEC-standard compatibility |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49BV002-12JC uniquely combines PLCC-32 mechanical compatibility, hardware-enforced boot block protection, and 12 V RESET override-critical for safety-critical firmware update workflows.
Availability
AT49BV002-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive ECU parameter calibration requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV002-12JC 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 legacy Flash product lines including the AT49BV series for industrial and automotive embedded applications.
The AT49BV002-12JC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in resource-constrained 3V microcontroller platforms with stringent data retention and security requirements.
FAQ
What is the operating voltage range for the AT49BV002-12JC?
The AT49BV002-12JC operates from 2.7 V to 3.6 V. This single-supply range eliminates the need for separate 5 V programming voltages and supports direct integration with 3 V microcontrollers and battery-backed systems. Operation below 2.7 V disables programming functions via internal VCC sense circuitry, preventing inadvertent writes during brown-out conditions.
Does the AT49BV002-12JC support hardware reset-based boot block unlocking?
Yes, the AT49BV002-12JC supports boot block reprogramming via 12.0 V ± 0.5 V applied to the RESET pin during chip erase, sector erase, or byte programming. This feature is explicitly documented for the AT49BV002 (non-N, non-T) variant and is not available on AT49BV002N or AT49BV002T versions. The AT49BV002-12JC retains this capability.
How is the memory organized in the AT49BV002-12JC?
The AT49BV002-12JC organizes its 2 Mbit array into one 16 KB boot block (00000h–03FFFh), two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB). This sector architecture enables selective erasure-critical for updating application code without disturbing bootloader or calibration data stored in protected regions.
What methods does the AT49BV002-12JC provide to detect end-of-program or end-of-erase?
The AT49BV002-12JC provides two hardware-supported detection methods: DATA polling (I/O7 returns complement of written data until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during operation, then stabilizes). Both operate without halting the host processor and are fully compatible with standard microprocessor bus timing.
Is the AT49BV002-12JC pin-compatible with other members of the AT49BV/LV002 family?
Yes, the AT49BV002-12JC shares identical PLCC-32 pinout and signal definitions with all AT49BV002, AT49BV002N, AT49BV002T, AT49LV002, and related variants. Differences lie in voltage range (BV vs LV), timing grade (-12 vs -90), and feature availability (e.g., RESET override present only in non-N/non-T parts), not physical connectivity.
AT49BV002-12JC 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:
- 120 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV002-12JC FAQ
1.How can I place an order for AT49BV002-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002-12JC 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 AT49BV002-12JC reliable?
The price and inventory of AT49BV002-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002-12JC is usually 5 days.
3.What payment methods are accepted for AT49BV002-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002-12JC?
AT49BV002-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002-12JC 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 AT49BV002-12JC?
For technical support, including AT49BV002-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002-12JC requirements.
6.How does Aetrix verify that AT49BV002-12JC is sourced from the original manufacturer or authorized distributors?
All AT49BV002-12JC 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 AT49BV002-12JC meets industry standards.
7.What is the process for return or replacement of AT49BV002-12JC?
All AT49BV002-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002-12JC, 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 AT49BV002-12JC part is unused and in its original packaging.
Return procedure for AT49BV002-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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