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Microchip Technology AT49BV002NT-12TC
- Part No.:
- AT49BV002NT-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV002NT-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,944
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Product details
Overview
AT49BV002NT-12TC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 120 ns read access time, supports sector-based erase (10 s chip erase), offers boot block programming lockout, and operates across commercial temperature range (0°C to 70°C) in 32-lead TSOP package.
For engineers reviewing the AT49BV002NT-12TC datasheet, AT49BV002NT-12TC pinout, AT49BV002NT-12TC application, or AT49BV002NT-12TC equivalent, this page provides verified functional identity, validated pin-level interface behavior, confirmed sector architecture, real-world timing constraints, and direct alternative part comparisons for legacy design continuity and supply chain resilience.
Technical Context
The AT49BV002NT-12TC implements a standard parallel Flash interface with CE/OE/WE control logic and 18-bit address bus (A0–A17), supporting EPROM-like read operation and command-based byte/sector/chip erase and programming. Its memory map includes a 16 KB boot block (address 3C000H–3FFFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB).
It uses internal program control with hardware data protection (VCC sense, noise filtering, and write inhibit logic), DATA polling and Toggle Bit for cycle completion detection, and RESET-pin-based boot block override (12 V) - though RESET is DC on this N(T) variant per datasheet note. The device requires no high-voltage programming signals and executes all operations via six-byte software command sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Supply Voltage | 2.7 V to 3.6 V - enables direct battery-voltage operation without level-shifting |
| Read Access Time | 120 ns - defines maximum system clock rate for zero-wait-state reads |
| Erase Cycle Time | 10 seconds (chip erase) - determines firmware update latency in field-programmable systems |
| Byte Programming Time | 30 µs typical - sets minimum time between successive byte writes during patching |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers |
| Write Endurance | 10,000 program/erase cycles - specifies field lifetime under frequent firmware updates |
| Standby Current | 50 µA CMOS - critical for low-power battery-backed applications |
Pinout & Package
AT49BV002NT-12TC is packaged in a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 mm × 20 mm), pin-compatible with industry-standard 32-pin Flash footprints. Pin 9 is NC (Not Connected) per datasheet Rev. 0982D–FLASH–02/03.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus selecting one of 262,144 bytes; A17 enables full 2 Mbit addressing |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; 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 |
| OE | Output Enable | Active-low output gate; controls data bus drive to prevent contention during shared-bus operation |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and programming |
| RESET | Reset Input | DC pin on AT49BV002NT variants; held high for normal operation; not used for reset or override |
| VCC | Power Supply | 2.7–3.6 V core supply; powers logic and memory array |
| GND | Ground | Reference return path for all I/O and internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (3C000H–3FFFFH) prevents accidental overwrite of bootloader code |
| Sector Architecture | Independent erasability of two 8 KB parameter blocks and two main memory blocks enables modular firmware updates |
| Hardware Data Protection | VCC sense (<1.8 V inhibits write), noise filter (<15 ns pulse rejection), and control-line inhibit prevent spurious programming |
| Command-Based Operation | All functions (erase, program, ID, lockout) executed via documented 4–6 bus-cycle software commands - no external high-voltage generator needed |
| Low-Power Standby | 50 µA CMOS standby current enables multi-year battery life in always-on embedded logging devices |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing fast, reliable code execution and field-upgradable firmware storage. Use Value: 120 ns read access enables deterministic real-time scan cycle timing; sector erase allows partial firmware updates without full reflash downtime. | Use Scenario: Securing certified bootloader code in Class II medical instruments requiring regulatory-compliant firmware integrity. IC Role / Device Role / Timing Role: Boot block-protected Flash memory ensuring immutable startup code execution at power-on reset. Use Value: Hardware-enforced boot block lockout (3C000H–3FFFFH) prevents unauthorized modification of safety-critical initialization routines. |
| Automotive Body Control Module | Legacy Industrial HMI Display |
Use Scenario: Holding calibration data and feature-enable flags in automotive body control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-rated Flash memory supporting EEPROM-like data retention and in-system reprogramming over vehicle lifetime. Use Value: 10,000 write cycles and 50 µA standby current support long-term reliability and low quiescent power in always-connected modules. | Use Scenario: Replacing obsolete EPROMs in industrial human-machine interface displays requiring field firmware patches. IC Role / Device Role / Timing Role: Drop-in parallel Flash replacement with identical 32-pin TSOP footprint and EPROM-compatible read protocol. Use Value: 120 ns access time and CE/OE/WE interface ensure seamless integration into legacy 8051/80C188-based display controllers without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV002T-12TC | Same density, voltage, timing, and TSOP package; differs only in absence of 'N' (no NC pin handling distinction) | Identical boot block location (3C000H–3FFFFH) and command set; fully compatible in existing designs using AT49BV002NT-12TC | Select when sourcing flexibility is required and NC pin behavior is not design-critical |
| SST39VF020-120-4C-NHE | 2 Mbit, 3.3 V, 120 ns, 32-pin TSOP; supports CFI query, lacks boot block lockout, uses different command set | Requires firmware driver modification; no hardware-protected boot sector - unsuitable where bootloader integrity is mandated | Choose only for cost-sensitive, non-safety-critical upgrades where software-managed protection suffices |
Compared with AT49BV002T-12TC, the AT49BV002NT-12TC adds explicit NC pin documentation for TSOP layout verification; versus SST39VF020, it provides hardware-enforced boot block security and Atmel-command compatibility - critical for legacy Atmel-based systems maintaining firmware trust boundaries.
Availability
AT49BV002NT-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 and long-term obsolescence management.
Supply support for AT49BV002NT-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 AT49BV002NT-12TC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3 V–only embedded systems needing in-system reprogrammability without high-voltage programming infrastructure.
FAQ
What is the boot block address range for AT49BV002NT-12TC?
The boot block for AT49BV002NT-12TC occupies addresses 3C000H to 3FFFFH (16 KB). This differs from non-T variants (00000H–03FFFH) and is explicitly defined in the datasheet Rev. 0982D–FLASH–02/03 for all (N)T suffix parts. The AT49BV002NT-12TC uses this upper-address boot block to isolate startup code from main application memory.
Is the RESET pin functional on AT49BV002NT-12TC?
No - the RESET pin is a DC (don't connect) terminal on AT49BV002NT-12TC per datasheet note. It is not connected internally and must be left unconnected or tied to VCC/GND per board layout guidelines. This distinguishes it from non-N(T) versions where RESET supports 12 V override; the AT49BV002NT-12TC omits that functionality entirely.
Does AT49BV002NT-12TC support sector erase?
Yes - AT49BV002NT-12TC supports independent sector erase of its two 8 KB parameter blocks and two main memory blocks (96 KB and 128 KB) via documented six-cycle command sequences. Sector erase time is internally controlled and completes within the same 10-second maximum as chip erase, enabling targeted firmware updates without affecting unrelated memory regions.
What is the meaning of the 'N' and 'T' in AT49BV002NT-12TC?
In AT49BV002NT-12TC, 'N' indicates NC (not connected) pin handling - pin 1 (DIP/PLCC) or pin 9 (TSOP/VSOP) is unused and must be left floating. 'T' denotes top-boot architecture, placing the 16 KB boot block at the highest address (3C000H–3FFFFH). The '-12' specifies 120 ns read access time, and 'TC' identifies the 32-pin TSOP package with commercial temperature grade (0°C to 70°C).
Can AT49BV002NT-12TC be used as a direct replacement for AT49BV002-12TC?
No - AT49BV002NT-12TC is not a drop-in replacement for AT49BV002-12TC. While both share 120 ns timing and TSOP packaging, the 'N' suffix mandates NC pin handling (pin 9 must be unconnected), and the 'T' suffix moves the boot block to 3C000H–3FFFFH. Firmware relying on 00000H–03FFFH boot addressing or using RESET for override will fail unless modified to match AT49BV002NT-12TC's architecture.
AT49BV002NT-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
AT49BV002NT-12TC FAQ
1.How can I place an order for AT49BV002NT-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002NT-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 AT49BV002NT-12TC reliable?
The price and inventory of AT49BV002NT-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002NT-12TC is usually 5 days.
3.What payment methods are accepted for AT49BV002NT-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002NT-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002NT-12TC?
AT49BV002NT-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002NT-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 AT49BV002NT-12TC?
For technical support, including AT49BV002NT-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002NT-12TC requirements.
6.How does Aetrix verify that AT49BV002NT-12TC is sourced from the original manufacturer or authorized distributors?
All AT49BV002NT-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 AT49BV002NT-12TC meets industry standards.
7.What is the process for return or replacement of AT49BV002NT-12TC?
All AT49BV002NT-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002NT-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 AT49BV002NT-12TC part is unused and in its original packaging.
Return procedure for AT49BV002NT-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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