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Microchip Technology AT49BV002N-12TC
- Part No.:
- AT49BV002N-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV002N-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,215
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Product details
Overview
AT49BV002N-12TC from Microchip Technology (formerly Atmel) is a 2-Mbit (256K × 8) single-supply Flash memory IC designed for in-system reprogrammability in embedded boot code storage. It operates from 2.7V to 3.6V, delivers 120 ns read access time, supports sector-erase architecture with 16K-byte boot block and two 8K-byte parameter blocks, and is rated for ≥10,000 write/erase cycles. It is commonly used in microcontroller-based systems requiring secure, field-upgradable firmware storage.
For engineers reviewing the AT49BV002N-12TC datasheet, AT49BV002N-12TC pinout, AT49BV002N-12TC application, or AT49BV002N-12TC equivalent, key selection criteria include its 32-pin TSOP package, boot-block lockout capability, DATA polling and toggle-bit programming status detection, and compatibility with standard 5V-command protocols despite 3V-only operation.
Technical Context
The AT49BV002N-12TC implements a command-register-based architecture using standard CE/OE/WE control logic identical to EPROMs, enabling drop-in replacement in legacy designs. Its internal program control includes automatic pulse generation and timing, eliminating external high-voltage programming circuitry.
It features hardware data protection via VCC sense (<1.8V inhibits programming), noise filtering on WE/CE inputs (<15 ns pulses ignored), and dual-line bus contention prevention through independent CE and OE enable logic. The RESET pin is DC-connected (not functional for reset or override), distinguishing it from T-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - directly maps to 8-bit microcontroller data buses without address translation. |
| Read Access Time | 120 ns - determines maximum sustained instruction fetch rate in 8-bit MCU boot loaders. |
| Supply Voltage | 2.7V–3.6V - enables direct connection to 3.3V system rails without level-shifting or regulator overhead. |
| Byte Programming Time | 30 µs typical - defines minimum time per byte during firmware updates; supports efficient field patching. |
| Erase Cycle Time | 10 seconds max (chip or sector) - enables predictable update windows in industrial firmware maintenance routines. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - allows real-time status monitoring without polling overhead or external timers. |
| Write Endurance | ≥10,000 program/erase cycles - qualifies for long-life embedded applications such as industrial HMI firmware storage. |
| Standby Current | 50 µA CMOS - ensures ultra-low power retention during system sleep modes in battery-backed systems. |
Pinout & Package
AT49BV002N-12TC is supplied in a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 mm × 20 mm), pin-compatible with industry-standard 32-pin Flash memory footprints. Pin 9 is a no-connect (NC) terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A17 selects upper/lower 128K region. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8-bit microcontrollers and FPGA configuration ports. |
| CE | Chip Enable | Active-low chip select; enables device decoding in multi-chip memory maps; must be low for read/write. |
| OE | Output Enable | Active-low output gate; controls data bus drive to prevent contention when multiple devices share a bus. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | DC-connected (non-functional); not used for reset or boot-block override - differs from T-suffix variants. |
| VCC | Power Supply | Single 2.7–3.6V supply; powers all internal logic and charge pumps - no auxiliary voltage required. |
| GND | Ground Reference | Common return path for I/O and core logic; requires low-impedance PCB plane for stable erase/write margins. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code; enabled via 6-cycle command sequence. |
| Sector Erase Architecture | Independent erasure of two 8K-byte parameter blocks and two main memory blocks (96K/128K bytes) enables granular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense, noise-filtered WE/CE inputs, and OE/CE/WE inhibit logic eliminate spurious writes during power transients or EMI events. |
| Standard Command Protocol | 5V-level command sequences (e.g., 5555H/AAH, 2AAAH/55H) operate over 3V supply - eliminates need for external voltage translators. |
| DATA Polling & Toggle Bit | Dual asynchronous status reporting (I/O7 complement and I/O6 toggle) enables flexible, interrupt-driven programming flow without fixed timing delays. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing certified bootloader and safety-critical initialization code in programmable logic controllers with field-upgrade requirements. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup execution and secure firmware validation prior to application load. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; 120 ns access meets real-time scan cycle timing budgets. |
Use Scenario: Holding FDA-compliant boot firmware in portable diagnostic equipment requiring traceable, tamper-resistant code storage. IC Role / Device Role / Timing Role: Secure, low-power Flash memory for certified boot sequence execution under battery-operated conditions. Use Value: 50 µA standby current extends battery life; hardware write protection prevents corruption during ESD events or brownout conditions. |
| Automotive Body Control Module | Consumer Set-Top Box Configuration |
Use Scenario: Storing calibrated sensor parameters and CAN firmware images in body control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-stable Flash memory supporting in-vehicle reprogramming via diagnostic port. Use Value: Industrial temperature rating (-40°C to +85°C) and 10-second erase enable rapid calibration updates during service intervals. |
Use Scenario: Retaining user preferences, channel maps, and regional firmware patches in digital TV receivers with frequent OTA updates. IC Role / Device Role / Timing Role: Field-reprogrammable configuration memory supporting seamless background firmware upgrades. Use Value: Sector-erase capability allows parameter block updates without disrupting main application code; 30 µs/byte programming minimizes user-perceived update latency. |
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 | 2 Mbit, 120 ns access, 3.0–3.6V, same TSOP-32 package; lacks boot-block lockout but offers faster 10 µs byte programming. | No dedicated boot sector protection; requires external software management of critical code regions. | Select when faster programming outweighs need for hardware-enforced bootloader security. |
| MX29LV020TC-12 | 2 Mbit, 120 ns, 2.7–3.6V, TSOP-32; includes boot-block protection but uses different command set (e.g., 5555H/AAH → 5555H/AAH/2AAA/55H/5555H/A0H). | Requires firmware adaptation for command sequences; pinout identical but timing tolerances differ slightly (tWP = 100 ns vs. 90 ns). | Select when migrating from existing Macronix-based designs or requiring second-source availability with verified boot-block behavior. |
Compared with SST39VF020-120-4C-NHE and MX29LV020TC-12, the AT49BV002N-12TC provides unique hardware-enforced boot-block lockout with zero software overhead, making it optimal for safety-critical boot code where firmware integrity is non-negotiable.
Availability
AT49BV002N-12TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and guaranteed TSOP-32 footprint compatibility.
Supply support for AT49BV002N-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 memory products, including manufacturing, documentation, and technical assistance.
The AT49BV002N-12TC belongs to Atmel's Battery-Voltage™ Flash family, engineered specifically for reliable, low-voltage in-system reprogramming in resource-constrained embedded systems with stringent firmware security and longevity requirements.
FAQ
What is the function of the RESET pin on the AT49BV002N-12TC?
The RESET pin on the AT49BV002N-12TC is a DC-connected (don't-connect) terminal with no functional role. Unlike the T-suffix variants, it does not support reset assertion or boot-block override. Per datasheet Rev. 0982D, pin 9 in the TSOP package is NC, and applying voltage to this pin has no effect on device operation or programming lockout state. This design simplifies system integration by eliminating RESET signal routing.
Does the AT49BV002N-12TC support 5V-tolerant command inputs?
Yes, the AT49BV002N-12TC accepts 5V-level command inputs (e.g., 5555H/AAH, 2AAAH/55H) while operating from a 2.7–3.6V VCC supply. This allows direct interfacing with 5V microcontrollers or FPGAs without level shifters. The command protocol is electrically compatible with standard EPROM timing, and all control pins (CE, OE, WE) tolerate input voltages up to 6.25V per Absolute Maximum Ratings.
How is boot block protection enabled on the AT49BV002N-12TC?
Boot block protection on the AT49BV002N-12TC is enabled via a six-bus-cycle command sequence: load AAH at 5555H, 55H at 2AAAH, 80H at 5555H, AAH at 5555H, 55H at 2AAAH, and 40H at 5555H. Once activated, the 16K-byte boot block (00000H–03FFFH) becomes permanently write-protected under ≤5.5V conditions. The AT49BV002N-12TC does not support 12V RESET override, unlike T-suffix versions.
What are the valid sector erase address ranges for the AT49BV002N-12TC?
The AT49BV002N-12TC supports sector erase at four distinct address ranges: Parameter Block 1 (04000H–05FFFH), Parameter Block 2 (06000H–07FFFH), Main Memory Block 1 (08000H–1FFFFH), and Main Memory Block 2 (20000H–3FFFFH). The boot block (00000H–03FFFH) cannot be erased when lockout is enabled. Sector erase uses the same 6-cycle command as chip erase, with sector address latched on the sixth WE falling edge.
Can the AT49BV002N-12TC be used in place of the AT49BV002-12TC?
No - the AT49BV002N-12TC and AT49BV002-12TC are not interchangeable. The "N" suffix denotes the absence of RESET functionality: AT49BV002N-12TC has a DC-connected (NC) RESET pin, while AT49BV002-12TC implements active RESET with 12V override capability for boot-block reprogramming. Their pinouts differ at pin 1 (PLCC/DIP) or pin 9 (TSOP/VSOP), and firmware relying on RESET-based unlock will fail on the N-suffix variant.
AT49BV002N-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
AT49BV002N-12TC FAQ
1.How can I place an order for AT49BV002N-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002N-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 AT49BV002N-12TC reliable?
The price and inventory of AT49BV002N-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002N-12TC is usually 5 days.
3.What payment methods are accepted for AT49BV002N-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002N-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002N-12TC?
AT49BV002N-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002N-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 AT49BV002N-12TC?
For technical support, including AT49BV002N-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002N-12TC requirements.
6.How does Aetrix verify that AT49BV002N-12TC is sourced from the original manufacturer or authorized distributors?
All AT49BV002N-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 AT49BV002N-12TC meets industry standards.
7.What is the process for return or replacement of AT49BV002N-12TC?
All AT49BV002N-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002N-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 AT49BV002N-12TC part is unused and in its original packaging.
Return procedure for AT49BV002N-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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