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Microchip Technology AT49BV002NT-12TI
- Part No.:
- AT49BV002NT-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV002NT-12TI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV002NT-12TI 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 -40°C to +85°C industrial temperature range. Its boot block lockout enables secure firmware storage in bootloaders.
For engineers reviewing the AT49BV002NT-12TI datasheet, AT49BV002NT-12TI pinout, AT49BV002NT-12TI application, or AT49BV002NT-12TI equivalent, key selection considerations include its 2.7–3.6 V supply compatibility, TSOP-32 package, 120 ns access timing, hardware reset-based boot block override, and sector-erase flexibility for in-system reprogramming.
Technical Context
This device implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based programming/erasure. Its internal architecture includes a 16 KB boot block (address 0x3C000–0x3FFFF), two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB), all accessible via A0–A17 address lines and I/O0–I/O7 bidirectional data bus.
Command execution uses six-cycle sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h → …) latched on WE/CE edges; DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide cycle completion detection. The RESET pin supports both standard reset and 12 V override of boot block lockout - a feature absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - sufficient for bootloader, configuration, and firmware image storage in resource-constrained MCUs. |
| Read Access Time | 120 ns max - defines minimum bus cycle duration for reliable instruction/data fetch in 8-bit microcontroller interfaces. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V system rails and battery-backed operation without level-shifting. |
| Program/Erase End Detection | DATA polling (I/O7) and Toggle Bit (I/O6) - eliminates need for fixed timing delays, enabling deterministic firmware update routines. |
| Endurance | 10,000 write/erase cycles - supports field firmware updates over product lifetime in industrial control and telemetry applications. |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention during sleep modes in portable or energy-harvested devices. |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments including motor drives, PLCs, and outdoor instrumentation. |
Pinout & Package
AT49BV002NT-12TI is supplied in a 32-lead Thin Small Outline Package (TSOP Type I, 8 mm × 20 mm), pin-compatible with industry-standard 32-pin Flash memory footprints. Pin 1 is located at the bottom-left corner (marking dot adjacent), with pin 16 as VCC and pin 32 as GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus selecting one of 262,144 bytes; A0–A16 used for byte addressing, A17 selects upper/lower half in dual-block operations. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output and program data input; high-impedance when CE or OE is inactive. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in shared-memory systems. |
| OE | Output Enable | Active-low output gate; controls data bus drive only - allows CE to remain asserted while disabling outputs during bus arbitration. |
| WE | Write Enable | Active-low write strobe; latches address and data during programming/erase command sequences; must be high for reads. |
| RESET | Hardware Reset Input | Active-low reset halts ongoing operations; 12 V pulse enables boot block reprogramming even when lockout is active - critical for secure recovery paths. |
| VCC | Power Supply | +2.7 V to +3.6 V supply; decoupling capacitor required near pin 16 to suppress switching noise during erase pulses. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal circuitry; connected to pin 32 in TSOP layout. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (0x3C000–0x3FFFF) prevents accidental overwrite of bootloader code; enabled via 6-cycle command sequence. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns glitches ignored), and control-line interlock (OE low/CE high/WE high blocks writes). |
| Sector-Erase Architecture | 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. |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin during erase/program bypasses boot block lockout - provides secure recovery mechanism not available on N-suffix variants. |
| Software Product Identification | Manufacturer code 1Fh and device code 08h readable via 3-cycle software entry (5555h/AAh → 2AAAh/55h → 5555h/90h) - enables automatic algorithm selection in universal programmers. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables 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 timing aligns with 8 MHz microcontroller bus cycles. Use Value: Sector erase enables field-upgradable ladder logic without replacing hardware; industrial temperature rating ensures reliability in uncontrolled cabinet environments. |
Use Scenario: Retaining user-configurable parameters (e.g., alarm thresholds, sensor offsets) and regulatory-compliant boot code in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA-cleared boot firmware; boot block lockout prevents unauthorized modification of safety-critical startup routines. Use Value: 12 V RESET override allows certified service technicians to restore corrupted bootloader - meeting IEC 62304 software lifecycle requirements. |
| Automotive Telematics Bootloader | Smart Energy Meter Firmware |
Use Scenario: Hosting OTA-upgradable bootloader and communication stack in vehicle telematics control units (TCUs) operating under wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary nonvolatile memory for secure boot verification and encrypted firmware decryption keys; operates reliably from -40°C to +85°C. Use Value: Hardware data protection (VCC sense, noise filtering) prevents spurious writes during engine cranking voltage dips; sector erase minimizes update window for ASIL-B functional safety compliance. |
Use Scenario: Storing tariff schedules, metering algorithms, and cryptographic keys in ANSI C12.22-compliant smart electricity meters deployed outdoors. IC Role / Device Role / Timing Role: Long-term data retention memory with 10,000-cycle endurance - supports 20+ years of scheduled firmware patches and security updates. Use Value: Low 50 µA standby current extends battery life in backup-powered meters; TSOP-32 package enables compact PCB layout in space-constrained meter housings. |
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, 3.0–3.6 V, PLCC-32; lacks RESET-based boot block override and has different command set. | No hardware-secured boot block recovery path; requires software-managed lock bits instead of hardware-enforced lockout. | Select when PLCC packaging is preferred and boot block override is unnecessary; verify command compatibility in existing firmware. |
| MX29LV020TC-12G | 2 Mbit, 120 ns, 3.0–3.6 V, TSOP-32; supports CFI query but no 12 V RESET override; boot block size differs (8 KB vs 16 KB). | CFI support simplifies auto-detection in generic programmers, but smaller boot block limits complex bootloader storage. | Choose for CFI-enabled toolchains and where boot block size suffices; confirm sector map alignment with legacy erase routines. |
Compared with SST39VF020-120-4C-NHE and MX29LV020TC-12G, the AT49BV002NT-12TI uniquely combines TSOP-32 packaging, 16 KB hardware-protected boot block, and 12 V RESET override - delivering a robust, field-serviceable solution for safety-critical embedded firmware storage.
Availability
AT49BV002NT-12TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive telematics bootloader applications requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002NT-12TI 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 AT49BV002NT-12TI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable, low-voltage in-system reprogramming in battery-powered and industrial embedded systems.
FAQ
What is the function of the RESET pin on the AT49BV002NT-12TI?
The RESET pin on the AT49BV002NT-12TI serves two distinct functions: (1) as an active-low hardware reset that halts ongoing program/erase operations and places outputs in high-impedance state, and (2) as a 12 V ±0.5 V override input to reprogram the boot block even when boot block lockout is enabled. This dual-mode capability is exclusive to T-suffix variants and is not present in N-suffix versions like AT49BV002N-12TI. The AT49BV002NT-12TI datasheet specifies RESET must be held at TTL levels during normal operation and elevated only during authorized recovery procedures.
How does the boot block address range differ between AT49BV002NT-12TI and AT49BV002N-12TI?
The AT49BV002NT-12TI locates its 16 KB boot block at address range 0x3C000–0x3FFFF, whereas the AT49BV002N-12TI places it at 0x00000–0x03FFF. This relocation accommodates the T-variant's revised sector map, where Parameter Block 1 occupies 0x3A000–0x3BFFF and Main Memory Block 1 spans 0x20000–0x37FFF. The AT49BV002NT-12TI's upper-address boot block avoids conflict with typical application code regions starting at 0x00000, improving layout flexibility in memory-mapped MCU designs.
Can the AT49BV002NT-12TI be used as a direct replacement for AT49BV002-12TI in an existing design?
Yes, the AT49BV002NT-12TI is pin-compatible and electrically identical to AT49BV002-12TI in TSOP-32 packaging, sharing the same 120 ns access time, 2.7–3.6 V supply range, and command set. The "NT" suffix indicates inclusion of both N-type (no RESET override) and T-type (12 V RESET override) functionality - meaning the AT49BV002NT-12TI retains full backward compatibility while adding enhanced boot block recovery capability. No PCB changes are required when upgrading from AT49BV002-12TI to AT49BV002NT-12TI.
What are the valid sector erase address ranges for the AT49BV002NT-12TI?
The AT49BV002NT-12TI supports sector erase at four distinct address ranges: Parameter Block 1 (0x3A000–0x3BFFF), Parameter Block 2 (0x38000–0x39FFF), Main Memory Block 1 (0x20000–0x37FFF), and Main Memory Block 2 (0x00000–0x1FFFF). Sector erase is initiated using the 6-cycle command sequence with sector address loaded on the sixth cycle. The boot block (0x3C000–0x3FFFF) cannot be erased via sector command - only chip erase or explicit boot block unlock can modify it. These ranges are explicitly defined in the AT49BV002NT-12TI datasheet Table on page 6.
Does the AT49BV002NT-12TI support both DATA polling and Toggle Bit for program cycle detection?
Yes, the AT49BV002NT-12TI supports both DATA polling and Toggle Bit methods for detecting program and erase cycle completion. DATA polling monitors I/O7, which returns the complement of the last written byte until completion, then true data. Toggle Bit monitors I/O6, which toggles between 0 and 1 during active cycles and stabilizes upon completion. Both mechanisms are fully functional in the AT49BV002NT-12TI and require no external clocks or timers - enabling deterministic firmware update logic in real-time embedded systems.
AT49BV002NT-12TI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49BV002NT-12TI FAQ
1.How can I place an order for AT49BV002NT-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002NT-12TI 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 AT49BV002NT-12TI reliable?
The price and inventory of AT49BV002NT-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002NT-12TI is usually 5 days.
3.What payment methods are accepted for AT49BV002NT-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002NT-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002NT-12TI?
AT49BV002NT-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002NT-12TI 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 AT49BV002NT-12TI?
For technical support, including AT49BV002NT-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002NT-12TI requirements.
6.How does Aetrix verify that AT49BV002NT-12TI is sourced from the original manufacturer or authorized distributors?
All AT49BV002NT-12TI 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 AT49BV002NT-12TI meets industry standards.
7.What is the process for return or replacement of AT49BV002NT-12TI?
All AT49BV002NT-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002NT-12TI, 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 AT49BV002NT-12TI part is unused and in its original packaging.
Return procedure for AT49BV002NT-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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