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Microchip Technology AT49BV002T-12VC
- Part No.:
- AT49BV002T-12VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002T-12VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,781
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Product details
Overview
AT49BV002T-12VC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 120 ns read access time, sector-based architecture including a 16 KB boot block (address range 3C000H–3FFFFH), and hardware data protection. It is used in embedded systems for firmware storage and field-upgradable code execution.
For engineers reviewing the AT49BV002T-12VC datasheet, AT49BV002T-12VC pinout, AT49BV002T-12VC application, or AT49BV002T-12VC equivalent, key selection considerations include boot-block lockout override via 12 V RESET, sector erase granularity, DATA polling/Toggle Bit end-of-write detection, and compatibility with standard microprocessor bus timing.
Technical Context
The AT49BV002T-12VC implements a command-register-based programming model using six-byte sequences (e.g., 5555H/AAH → 2AAAH/55H → 5555H/80H → …) for chip/sector erase and byte programming. Its memory is partitioned into one 16 KB boot block, two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB), with boot block lockout enabled via software command and overridden only by applying 12 V ±0.5 V to RESET.
It supports standard EPROM-like read operation (CE/OE low, WE high), features hardware VCC sense (<1.8 V inhibits programming), noise filtering on WE/CE (<15 ns pulses ignored), and dual standby modes (CMOS: 50 µA; TTL: 3 mA). The device operates across industrial temperature range (−40°C to +85°C) and requires no external high-voltage programming supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - directly maps to 16-bit or 8-bit microcontroller data buses without address translation. |
| Read Access Time | 120 ns max - compatible with 8 MHz Z80, 68K, or early ARM7 bus cycles without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct interface with 3.3 V logic and battery-backed operation in portable systems. |
| Boot Block Size | 16 KB (3C000H–3FFFFH) - isolates secure bootloader code from field updates to main application memory. |
| Byte Programming Time | 30 µs typical - allows real-time patching of small code segments during maintenance without full reflash. |
| Erase Cycle Time | 10 seconds max for full chip - enables predictable firmware update windows in production test and field service. |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - supports multi-year field upgrade cycles in industrial controllers and telecom equipment. |
Pinout & Package
AT49BV002T-12VC is available in 32-lead VSOP (8 × 14 mm) package per ordering code suffix "VC". Pin functions are electrically identical across PLCC, PDIP, TSOP, and VSOP variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A17 required for accessing upper 128 KB block (20000H–3FFFFH). |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; supports byte-wide reads/writes and matches standard microprocessor data bus width. |
| CE | Chip Enable | Active-low chip select; enables device decoding in multi-chip memory maps; must be low with OE low for valid read. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block reprogramming when lockout is active. |
| VCC | Power Supply | +2.7 V to +3.6 V supply; powers core logic and memory array; internal regulation ensures stable programming voltage. |
| GND | Ground | Reference return for all signals and power; decoupling capacitor placement near this pin critical for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout Override | 12 V applied to RESET pin permits reprogramming of protected 16 KB boot sector - essential for recovery after corrupted bootloader. |
| Sector-Erasable Architecture | Independent erase of two 8 KB parameter blocks and two main memory blocks (96 KB/128 KB) - enables modular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibition (OE low/CE high/WE high) prevent accidental writes - reduces risk of field corruption during power transients. |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling - eliminates polling delays and simplifies host driver implementation. |
| Single 2.7–3.6 V Supply | No 5 V or 12 V programming voltage required - eliminates level-shifting circuitry and supports direct integration into 3.3 V systems. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; 120 ns read access supports deterministic scan-cycle timing in real-time control loops. Use Value: Sector erase capability allows updating I/O module drivers without erasing safety-critical motion control algorithms stored in the boot block. | Use Scenario: Securing certified bootloader code in FDA-regulated diagnostic imaging equipment requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection; 16 KB boot block (3C000H–3FFFFH) holds immutable startup routines. Use Value: 12 V RESET override enables authorized service technicians to recover corrupted bootloaders while maintaining regulatory audit trails. |
| Telecom Base Station Configuration | Automotive Infotainment Update Module |
Use Scenario: Storing configuration profiles and protocol stacks for cellular baseband processors in remote radio units. IC Role / Device Role / Timing Role: Parameter block storage (two 8 KB sections) for carrier-specific settings; accessed via microcontroller during initialization. Use Value: Independent erasure of parameter blocks allows carrier reconfiguration without affecting main firmware image or calibration data. | Use Scenario: Field-upgrading navigation map data and UI assets in automotive head units via CAN-based OTA mechanisms. IC Role / Device Role / Timing Role: Secondary code storage partitioned from primary MCU flash; supports background download and atomic swap on reboot. Use Value: 10,000 write cycles and DATA polling ensure reliable over-the-air updates across 10+ years of vehicle service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-NHE | 4 Mbit (512K × 8), 70 ns access, 3.0–3.6 V supply, no 12 V RESET override for boot block. | Larger capacity but lacks boot block lockout override; requires external voltage switching for recovery. | Select when higher density and faster read speed are prioritized over field-recovery flexibility. |
| MX29LV200CBTI-70G | 2 Mbit (256K × 8), 70 ns access, 2.7–3.6 V, CFI-compliant command set, no dedicated 12 V RESET pin function. | Industry-standard CFI interface simplifies driver portability but removes hardware-assisted boot block recovery path. | Select when interoperability with existing CFI-aware bootloaders is required and 12 V override is not needed. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CBTI-70G, the AT49BV002T-12VC uniquely provides 12 V RESET-based boot block reprogramming - a critical differentiator for safety-critical or remotely serviced systems where guaranteed recovery from corrupted bootloader is mandatory.
Availability
AT49BV002T-12VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader, telecom base station configuration, and automotive infotainment update modules requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002T-12VC 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 memory product lines with full datasheet, reliability, and support continuity.
The AT49BV/LV002(N)(T) family was designed for cost-sensitive, space-constrained embedded systems requiring field-upgradable firmware with robust data integrity - especially where boot code protection and recovery are non-negotiable.
FAQ
What is the boot block address range for AT49BV002T-12VC?
The boot block for AT49BV002T-12VC occupies addresses 3C000H to 3FFFFH (16 KB). This differs from the base AT49BV002(N) variant, which uses 00000H–03FFFH. The relocated boot block enables flexible memory mapping in systems with larger code footprints.
Does AT49BV002T-12VC support 12 V programming voltage?
No - AT49BV002T-12VC operates exclusively from a single 2.7–3.6 V supply for both read and write operations. The "12" in the part number refers to 120 ns read access time, not programming voltage. However, 12 V ±0.5 V applied to the RESET pin enables boot block override, not programming.
How is end-of-program detection implemented in AT49BV002T-12VC?
AT49BV002T-12VC 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/erase, then stabilizes). Both allow host firmware to avoid fixed delays and improve update efficiency.
Can the boot block lockout feature be disabled after activation on AT49BV002T-12VC?
No - once enabled, the boot block lockout cannot be disabled via software command. However, AT49BV002T-12VC allows reprogramming of the locked boot block by applying 12 V ±0.5 V to the RESET pin during erase or program operations, restoring full functionality without requiring device replacement.
What package types are available for AT49BV002T-12VC?
AT49BV002T-12VC is specifically offered in the 32-lead VSOP (Very Small Outline Package), 8 mm × 14 mm footprint (ordering suffix "VC"). Other variants in the AT49BV002T family use PLCC ("JC"), PDIP ("PC"), or TSOP ("TC") packages, but "VC" denotes VSOP only.
AT49BV002T-12VC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49BV002T-12VC FAQ
1.How can I place an order for AT49BV002T-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002T-12VC 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-12VC reliable?
The price and inventory of AT49BV002T-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002T-12VC is usually 5 days.
3.What payment methods are accepted for AT49BV002T-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002T-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002T-12VC?
AT49BV002T-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002T-12VC 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-12VC?
For technical support, including AT49BV002T-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002T-12VC requirements.
6.How does Aetrix verify that AT49BV002T-12VC is sourced from the original manufacturer or authorized distributors?
All AT49BV002T-12VC 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-12VC meets industry standards.
7.What is the process for return or replacement of AT49BV002T-12VC?
All AT49BV002T-12VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002T-12VC, 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-12VC part is unused and in its original packaging.
Return procedure for AT49BV002T-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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