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Microchip Technology AT49BV002T-12VI
- Part No.:
- AT49BV002T-12VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002T-12VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,811
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Product details
Overview
AT49BV002T-12VI from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 3V Flash memory IC designed for in-system reprogrammability in embedded controllers and boot code storage. It features 70 ns read access time, 10-second chip erase, byte-programming at 30 µs/byte, 16K-byte boot block with programmable lockout, and operates across -40°C to +85°C industrial temperature range.
For engineers reviewing the AT49BV002T-12VI datasheet, AT49BV002T-12VI pinout, AT49BV002T-12VI application, or AT49BV002T-12VI equivalent, key selection considerations include boot-sector protection logic, sector-erase granularity (two 8K parameter blocks + two main memory blocks), DC/AC timing compliance at 120 ns tACC, and compatibility with standard microprocessor CE/OE/WE control bus protocols.
Technical Context
The AT49BV002T-12VI implements a sector-architected Flash array with distinct memory regions: a 16K-byte boot block (address 3C000H–3FFFFH), two 8K-byte parameter blocks (3A000H–3BFFFH and 38000H–39FFFH), and two main memory blocks (20000H–37FFFH and 00000H–1FFFFH). Its command-set architecture uses six-cycle sequences for chip/sector erase and boot lockout enable, with address latching on falling WE/CE edges and data latching on rising edges.
Hardware data protection includes VCC sense (<1.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low, CE high, or WE high blocks writes). DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide real-time program/erase completion detection without external timing dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), enabling full boot code + firmware storage in compact footprint |
| Read Access Time | 120 ns max - meets timing requirements for 8-bit microcontrollers running ≤8.3 MHz |
| Supply Voltage | 2.7–3.6 V - supports battery-powered and low-voltage industrial systems |
| Byte Programming Time | 30 µs typical - enables rapid field updates of configuration or calibration data |
| Erase Cycle Time | 10 seconds max for full chip - allows predictable firmware update windows |
| Endurance | 10,000 write/erase cycles - suitable for infrequently updated boot and parameter sectors |
| Operating Temperature | -40°C to +85°C - qualified for industrial control and automotive under-hood applications |
Pinout & Package
AT49BV002T-12VI is available in 32-lead VSOP (8 × 14 mm) package, pin-compatible with PLCC, PDIP, and TSOP variants. Pin functions are standardized across all packages per Atmel Rev. 0982D specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A14 used for software ID and command entry |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; I/O0 indicates boot lockout status; I/O6 provides toggle-bit completion signal |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; controls command latch timing |
| OE | Output Enable | Active-low output gate; enables data bus drive during read; high during programming to prevent contention |
| WE | Write Enable | Active-low write strobe; falling edge latches address; rising edge latches data for command/programming cycles |
| RESET* | Reset Input | Active-low reset; high-Z outputs when asserted; 12V override enables boot block reprogramming even when locked |
| VCC | Power Supply | +2.7V to +3.6V supply; powers core logic and charge pumps; internal regulation ensures stable programming voltage |
| GND | Ground | Reference for all I/O and internal circuitry; decoupling required within 10 mm of VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16K-byte region (3C000H–3FFFFH) protected via 6-cycle command sequence; prevents accidental overwrite of critical startup code |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibition eliminate unintended writes during power transients or EMI events |
| DATA Polling & Toggle Bit | Real-time program/erase completion detection using I/O7 complement or I/O6 toggling - removes need for fixed delay timers |
| Sector-Erase Architecture | Independent erasure of two 8K parameter blocks and two main memory blocks enables selective firmware updates without full chip erase |
| 12V RESET Override | Applying 12V ±0.5V to RESET pin bypasses boot lockout during erase/program - enables secure recovery without hardware redesign |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module Boot Code |
|---|---|
Use Scenario: Storing firmware and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing fast 120 ns read access to initialize CPU and load runtime code upon power-up. Use Value: Industrial temperature rating (-40°C to +85°C) and 10,000-cycle endurance ensure long-term reliability in unattended operation. | Use Scenario: Holding secure bootloader and safety-critical initialization routines in automotive body control units (BCUs). IC Role / Device Role / Timing Role: Boot block-protected Flash storing immutable startup code that verifies application integrity before execution. Use Value: 16K-byte boot lockout prevents corruption of certified bootloader during over-the-air updates to application firmware. |
| Medical Device Configuration Storage | Network Router Parameter Memory |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory-compliant settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block Flash (two 8K sections) storing field-updatable calibration data accessed via microcontroller SPI-like parallel interface. Use Value: Sector-erase capability allows independent update of calibration tables without disturbing operational firmware or boot code. | Use Scenario: Storing routing tables, security certificates, and configuration profiles in enterprise-grade wired/wireless routers. IC Role / Device Role / Timing Role: Main memory block Flash (96K/128K) holding persistent network state and firmware images accessible during cold boot or failover. Use Value: 2.7–3.6V operation and low 50 µA standby current support energy-efficient always-on networking infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-120-4C-NHE | 512K × 4 organization (2 Mbit total), 120 ns access, 3.0–3.6V supply, no boot block lockout | Lacks dedicated boot sector protection; requires external logic or firmware for secure boot enforcement | Select when cost-sensitive designs prioritize density over boot integrity features |
| MX29LV040CTTC-12G | 512K × 8 organization (4 Mbit), 120 ns access, 3.0–3.6V supply, 8K boot sector with lockout | Double density with smaller boot sector (8K vs. 16K); different command set and timing margins | Choose for higher capacity needs where 16K boot space is not mandatory |
Compared with SST39VF020-120-4C-NHE and MX29LV040CTTC-12G, the AT49BV002T-12VI uniquely delivers 16K boot block lockout with 12V RESET override, making it optimal for safety-critical boot code retention where field recovery must remain possible without hardware modification.
Availability
AT49BV002T-12VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control module boot code, medical device configuration storage, and network router parameter memory requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV002T-12VI 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 with full documentation and long-term supply commitment.
The AT49BV series was designed specifically for embedded systems requiring in-system reprogrammability, secure boot code storage, and robust operation in harsh industrial environments.
FAQ
What is the boot block address range for AT49BV002T-12VI?
The boot block for AT49BV002T-12VI occupies addresses 3C000H to 3FFFFH (16K bytes), distinct from the base AT49BV002(N) which uses 00000H–03FFFH. This relocated boot sector avoids conflict with main application code and aligns with common memory map conventions in 8051 and ARM7-based designs. The AT49BV002T-12VI datasheet confirms this mapping in Section 6 and the Block Diagram.
Does AT49BV002T-12VI support 12V programming voltage?
No - AT49BV002T-12VI is a single 2.7–3.6V supply Flash device. The "12V" in its designation refers to the 120 ns maximum access time (tACC), not programming voltage. However, applying 12.0V ±0.5V to the RESET pin enables boot block override during erase/program operations, as specified in the Boot Block Programming Lockout Override section of the AT49BV002T-12VI datasheet.
How does the AT49BV002T-12VI handle inadvertent write commands?
The AT49BV002T-12VI employs three hardware safeguards: (1) VCC sense circuitry disables programming if supply drops below ~1.8V; (2) any of OE low, CE high, or WE high inhibits write cycles; and (3) input noise filters reject pulses shorter than 15 ns on WE/CE. These features are documented in the Hardware Data Protection section of the AT49BV002T-12VI datasheet and ensure immunity to power glitches and EMI-induced false commands.
Can AT49BV002T-12VI be used in place of AT49BV002-12VI?
No - AT49BV002T-12VI and AT49BV002-12VI differ in boot block location (3C000H–3FFFFH vs. 00000H–03FFFH) and command-set behavior for sector erase. While both share 120 ns timing and VSOP packaging, the T-suffix variant's relocated boot sector requires firmware address remapping. The AT49BV002T-12VI datasheet explicitly states these architectural differences in the Device Operation and Command Definitions sections.
What is the purpose of the DC pin on AT49BV002T-12VI PLCC and DIP packages?
On AT49BV002T-12VI PLCC (32J) and PDIP (32P6) packages, pin 1 is designated "DC" (Don't Connect) and must remain unconnected. This pin has no internal connection and serves only as a mechanical placeholder. The AT49BV002T-12VI datasheet specifies this in the Pin Configurations section and warns against tying it to VCC, GND, or signals - doing so may cause undefined behavior or damage. TSOP/VSOP packages do not include this pin.
AT49BV002T-12VI 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:
- 120 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49BV002T-12VI FAQ
1.How can I place an order for AT49BV002T-12VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002T-12VI 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-12VI reliable?
The price and inventory of AT49BV002T-12VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002T-12VI is usually 5 days.
3.What payment methods are accepted for AT49BV002T-12VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002T-12VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002T-12VI?
AT49BV002T-12VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002T-12VI 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-12VI?
For technical support, including AT49BV002T-12VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002T-12VI requirements.
6.How does Aetrix verify that AT49BV002T-12VI is sourced from the original manufacturer or authorized distributors?
All AT49BV002T-12VI 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-12VI meets industry standards.
7.What is the process for return or replacement of AT49BV002T-12VI?
All AT49BV002T-12VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002T-12VI, 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-12VI part is unused and in its original packaging.
Return procedure for AT49BV002T-12VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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