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Microchip Technology AT49BV002T-12TC
- Part No.:
- AT49BV002T-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV002T-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
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Product details
Overview
AT49BV002T-12TC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 2.7–3.6V in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 120 ns read access time, sector-based erase architecture (including a 16 KB boot block at 0x3C000–0x3FFFF), hardware data protection, and DATA polling for program cycle detection. It is commonly deployed in industrial control firmware storage where field-upgradable boot code integrity is required.
For engineers reviewing the AT49BV002T-12TC datasheet, AT49BV002T-12TC pinout, AT49BV002T-12TC application, or AT49BV002T-12TC equivalent, key selection considerations include its 32-pin TSOP package, boot block lockout override via 12 V RESET, sector-erase granularity, 10,000 write/erase cycles, and compatibility with standard 5 V–compatible command sequences despite 3 V operation.
Technical Context
This device implements a command-register-based Flash architecture with six-byte software command sequences for chip erase, sector erase, byte programming, and boot block lockout enable/disable. Its internal logic supports dual-line control (CE/OE) for bus contention avoidance and integrates hardware voltage sensing (VCC < 1.8 V inhibits programming) and noise filtering (15 ns pulse rejection on WE/CE).
The memory array is partitioned into four physical sectors: one 16 KB boot block (0x3C000–0x3FFFF), two 8 KB parameter blocks (0x3A000–0x3BFFF and 0x38000–0x39FFF), and two main memory blocks (0x20000–0x37FFF and 0x00000–0x1FFFF). Sector erase and chip erase are internally timed; no external clocks are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - sufficient for full bootloader + configuration data in compact embedded systems. |
| Read Access Time | 120 ns maximum - meets timing requirements for 8-bit microcontrollers running at ≤8 MHz without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with single-cell Li-ion or regulated 3.3 V rails; no separate VPP required. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables rapid firmware updates during manufacturing or service. |
| Byte Programming Time | 30 µs typical - supports efficient field patching of individual configuration registers or calibration values. |
| Endurance | 10,000 program/erase cycles - validated for long-term use in industrial logging or parameter tuning applications. |
| Standby Current | 50 µA CMOS - enables low-power retention in battery-backed systems during sleep modes. |
Pinout & Package
AT49BV002T-12TC is supplied in a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 mm × 20 mm), compliant with JEDEC MO-152. Pin 1 is located at the bottom-left corner when the marking side faces up and the notch is oriented left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A17 map directly to memory locations 0x00000–0x3FFFF. |
| I/O0–I/O7 | Data Input/Output Bus | Bi-directional 8-bit data path; latched on rising edge of WE or CE during programming; high-impedance when CE or OE is high. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device activation in multi-chip memory maps. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention; outputs enter high-Z state when OE or CE is high. |
| WE | Write Enable | Active-low write strobe; initiates command latching and programming/erase cycles; falling edge latches address, rising edge latches data. |
| RESET* | Reset / Boot Override | Active-low reset input; applying 12 V ± 0.5 V overrides boot block lockout during erase/program; not available on N-suffix variants. |
| VCC | Power Supply | 2.7–3.6 V main supply; powers core logic, charge pumps, and I/O buffers; decoupling capacitor required per datasheet layout guidelines. |
| GND | Ground Reference | Signal and power ground reference plane; requires low-inductance connection to minimize noise during erase/program pulses. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout with 12 V Override | 16 KB boot sector (0x3C000–0x3FFFF) can be permanently write-protected; 12 V on RESET enables emergency reprogramming - critical for secure bootloader recovery. |
| Hardware Data Protection | VCC sense (<1.8 V disables programming), noise filtering (rejects <15 ns glitches), and control-line interlock (OE low/CE high/WE high inhibits writes) prevent accidental corruption. |
| DATA Polling & Toggle Bit | I/O7 complement indicates active programming; I/O6 toggling signals ongoing erase/program - eliminates need for fixed delay timers in host firmware. |
| Sector-Erase Flexibility | Independent erasure of two 8 KB parameter blocks and two main memory blocks (96 KB + 128 KB) enables modular firmware updates without full chip erase. |
| Standard Command Interface | 5 V–compatible command sequences (e.g., 0x5555/0x2AAA unlock) operate over 3 V supply - simplifies integration with legacy 5 V microcontrollers using level-shifting. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O mapping tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code/data storage with sector-erase capability to update logic modules independently while preserving boot integrity. Use Value: Enables remote firmware patches without full system reflash; boot block lockout ensures safe restart after partial updates. |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Low-power, high-reliability parameter storage with 50 µA standby current and 10,000-cycle endurance. Use Value: Guarantees data retention during 72-hour battery-only operation; hardware write protection prevents corruption during power brownouts. |
| Automotive Body Control Module (BCM) | Network Router Bootloader Storage |
Use Scenario: Holding vehicle-specific configuration (e.g., door lock behavior, lighting profiles) in automotive BCMs across extended temperature ranges (−40°C to +85°C). IC Role / Device Role / Timing Role: Industrial-grade Flash memory supporting AEC-Q100-compliant designs (via qualification of underlying process). Use Value: Meets automotive thermal cycling and ESD robustness requirements; 120 ns access supports real-time CAN message handling latency budgets. |
Use Scenario: Hosting primary bootloader code that initializes DRAM, loads Linux kernel, and verifies firmware signatures before execution. IC Role / Device Role / Timing Role: Secure, field-reprogrammable boot memory with hardware-locked boot sector to prevent unauthorized firmware injection. Use Value: 12 V RESET override allows OEM recovery of bricked units; sector erase permits signed firmware delta updates without exposing full image. |
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 V, 2 Mbit, 70 ns access; no boot block lockout override; 32-pin TSOP same footprint. | Lacks 12 V RESET override; relies on software-only lockout - less suitable for secure recovery-critical systems. | Select when boot block protection is managed entirely in software and 70 ns speed is required. |
| MX29LV040CTTI-70G | 3 V, 4 Mbit, 70 ns; includes CFI query support; 32-pin TSOP but different command set (JEDEC standard). | Doubles capacity and adds standardized identification; requires firmware adaptation for command sequences and status polling. | Select when future scalability to 4 Mbit is planned and CFI compliance is needed for toolchain interoperability. |
Compared with SST39VF020-70-4C-NHE and MX29LV040CTTI-70G, AT49BV002T-12TC uniquely combines 12 V–enabled boot block override, 120 ns timing headroom for slower controllers, and Atmel's proven command-set compatibility - making it optimal for cost-sensitive, security-aware industrial firmware storage where field recovery assurance is mandatory.
Availability
AT49BV002T-12TC is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device configuration retention, automotive body control module updates, and network equipment bootloader hosting requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for AT49BV002T-12TC 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 company specializes in microcontrollers, analog, Flash memory, and security ICs for industrial, automotive, and consumer markets.
The AT49BV002T-12TC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable, in-system reprogrammable nonvolatile storage in resource-constrained embedded systems operating from single 3 V supplies.
FAQ
What is the boot block address range for AT49BV002T-12TC?
The boot block for AT49BV002T-12TC occupies addresses 0x3C000 to 0x3FFFF (16 KB), distinct from the base AT49BV002(N) which uses 0x00000–0x03FFF. This relocated boot sector avoids conflict with main application code in larger memory maps and is explicitly defined in the AT49BV002(N)T datasheet revision 0982D.
Does AT49BV002T-12TC require a high-voltage VPP pin for programming?
No, AT49BV002T-12TC does not require an external high-voltage VPP pin. All programming and erase operations are performed using only the 2.7–3.6 V VCC supply and standard 5 V–compatible command sequences. Internal charge pumps generate necessary high voltages, simplifying PCB design and eliminating external HV circuitry.
How is boot block lockout overridden on AT49BV002T-12TC?
Boot block lockout on AT49BV002T-12TC 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 on N-suffix variants (e.g., AT49BV002N(T)) and is documented in the "Boot Block Programming Lockout Override" section of the datasheet.
What packages are available for AT49BV002T-12TC?
AT49BV002T-12TC is offered exclusively in the 32-lead TSOP (Thin Small Outline Package, Type 1, 8 mm × 20 mm) under ordering code suffix "TC". Other package options (PLCC "JC", PDIP "PC", VSOP "VC") exist for other speed grades or variants (e.g., AT49BV002T-12JC), but AT49BV002T-12TC specifically denotes the TSOP variant.
Can AT49BV002T-12TC be used with 5 V microcontrollers?
Yes, AT49BV002T-12TC supports 5 V–compatible command sequences (e.g., 0x5555/0x2AAA unlock codes) and accepts 5 V-tolerant inputs on CE, OE, WE, and RESET (up to +13.5 V on OE, +6.25 V on others). Level-shifting is only required for I/O0–I/O7 if the host operates strictly at 5 V logic - otherwise, direct interface is possible with appropriate voltage translation.
AT49BV002T-12TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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-TSOP
AT49BV002T-12TC FAQ
1.How can I place an order for AT49BV002T-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002T-12TC 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-12TC reliable?
The price and inventory of AT49BV002T-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002T-12TC is usually 5 days.
3.What payment methods are accepted for AT49BV002T-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002T-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002T-12TC?
AT49BV002T-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002T-12TC 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-12TC?
For technical support, including AT49BV002T-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002T-12TC requirements.
6.How does Aetrix verify that AT49BV002T-12TC is sourced from the original manufacturer or authorized distributors?
All AT49BV002T-12TC 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-12TC meets industry standards.
7.What is the process for return or replacement of AT49BV002T-12TC?
All AT49BV002T-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002T-12TC, 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-12TC part is unused and in its original packaging.
Return procedure for AT49BV002T-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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