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Microchip Technology AT49LV002NT-12TC
- Part No.:
- AT49LV002NT-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV002NT-12TC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,199
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Product details
Overview
AT49LV002NT-12TC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 3.0–3.6 V Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 120 ns read access time, sector-based erase architecture (including 16 KB boot block with programmable lockout), 10-second chip erase, and byte-programmable operation at 30 µs/byte - enabling in-system reprogramming in industrial control firmware updates.
For engineers reviewing the AT49LV002NT-12TC datasheet, AT49LV002NT-12TC pinout, AT49LV002NT-12TC application, or AT49LV002NT-12TC equivalent, key selection considerations include its TSOP-32 package, boot-block protection logic, DATA polling/Toggle Bit end-of-write detection, and compatibility with standard 5V-command protocol on 3V supply.
Technical Context
The AT49LV002NT-12TC implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot-lock enable. Its memory map is partitioned into one 16 KB boot block (address range 3C000H–3FFFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB + 128 KB), all accessible via standard CE/OE/WE control lines.
It supports hardware data protection via VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and dual-line write inhibit (OE low, CE high, or WE high). The RESET pin enables both system reset and 12 V override of boot-block lockout - a feature retained in the NT variant per datasheet Rev. 0982D.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8) - supports full firmware image storage for 8-bit MCUs with external bus interfaces. |
| Supply Voltage | 3.0 V to 3.6 V - operates directly from regulated 3.3 V rails without level-shifting or charge pumps. |
| Read Access Time | 120 ns - meets timing requirements for 8 MHz Z80/8051-style bus cycles with standard wait-state logic. |
| Erase Cycle Time | 10 seconds (chip erase) - enables field firmware updates within predictable maintenance windows. |
| Byte Programming Time | 30 µs typical - allows fine-grained patching of configuration tables or calibration data without full-sector erasure. |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Endurance | 10,000 program/erase cycles - suitable for applications requiring infrequent but reliable field updates over 10+ year product life. |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in battery-backed systems during sleep modes. |
Pinout & Package
AT49LV002NT-12TC is housed 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 1 is located at the bottom-left corner (marking dot adjacent), with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A14 used for software command entry (e.g., 5555H, 2AAAH). |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; carries command opcodes, data bytes, manufacturer/device IDs, and polling responses. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; latches address on falling edge during command writes. |
| OE | Output Enable | Active-low output control; enables data bus drivers during read; high during programming to prevent contention. |
| WE | Write Enable | Active-low write strobe; latches data on rising edge during programming; used with CE to initiate command sequences. |
| RESET | Reset / Boot Override | Active-low reset; when driven to 12 V ± 0.5 V, overrides boot-block lockout for reprogramming - functional in NT variant. |
| VCC | Power Supply | 3.0–3.6 V main supply; powers core logic, charge pumps, and I/O buffers; decoupling required per datasheet layout guidelines. |
| GND | Ground | Reference return path for all signals and power; requires low-inductance connection to minimize noise during erase/write transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB protected region (3C000H–3FFFFH) prevents accidental overwrite of bootloader code; enabled via 6-cycle command sequence. |
| Sector Architecture | Four independently erasable sectors (2 × 8 KB parameter blocks + 2 main memory blocks) allow selective firmware updates without full-chip erase. |
| Hardware Write Protection | VCC sense, noise filtering, and multi-signal inhibit (CE/OE/WE states) eliminate spurious programming from EMI or brown-out conditions. |
| 12 V RESET Override | Applying 12 V to RESET pin during erase/program operations temporarily disables boot-block lockout - critical for recovery in locked-field units. |
| Software Product ID | Manufacturer code 1FH and device code 08H readable via software mode (A0 = VIH/VIL at 5555H/2AAAH) - enables automatic algorithm selection in universal programmers. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers with field-upgrade capability. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-erase granularity; 120 ns access supports real-time scan cycle execution. Use Value: Boot-block protection ensures bootloader integrity across 10,000+ field updates; TSOP-32 footprint simplifies PCB layout in space-constrained DIN-rail modules. | Use Scenario: Retaining calibrated sensor offsets, user preferences, and safety-critical boot parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage with hardware write protection; 50 µA standby current extends battery life between recalibrations. Use Value: DATA polling eliminates fixed delays in host MCU firmware, reducing boot time by up to 8 ms per parameter write. |
| Automotive Body Control Module | Telecom Remote Node Bootloader |
Use Scenario: Holding CAN firmware images and EEPROM-emulation data in body control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: In-system reprogrammable Flash with industrial temperature rating; 3.0–3.6 V supply matches automotive LDO outputs. Use Value: Sector erase enables over-the-air (OTA) partial updates; 10-second chip erase fits within vehicle ignition-off maintenance windows. | Use Scenario: Storing secure bootloader code that validates signed firmware before loading into RAM in cellular base station remote units. IC Role / Device Role / Timing Role: Secure boot memory with 12 V RESET override for emergency recovery; boot-block lockout prevents tampering. Use Value: Manufacturer code 1FH + device code 08H enables automated verification in production test fixtures, reducing flash programming errors by >99%. |
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 | 3.3 V-only, 70 ns access, 2 Mbit density; no 12 V RESET override; boot-block lockout implemented differently (hardware fuse option). | Lacks 12 V recovery path; requires redesign if boot-block corruption recovery is mandatory. | Select when lower read latency is prioritized and field recovery via 12 V is not required. |
| MX29LV002CTTI-12 | 3.0–3.6 V, 120 ns access, same 2 Mbit density and TSOP-32 package; boot-block at 00000H–03FFFH (not top-aligned); no 12 V RESET override. | Boot block location differs - incompatible with existing address-mapped bootloader code expecting top 16 KB. | Select only if firmware can be relocated to bottom 16 KB and 12 V recovery is unnecessary. |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49LV002NT-12TC uniquely provides top-aligned 16 KB boot block (3C000H–3FFFFH) with 12 V RESET override - essential for secure, recoverable bootloader deployment in mission-critical embedded systems.
Availability
AT49LV002NT-12TC is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive body electronics, and telecom infrastructure requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT49LV002NT-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 the AT49LV series.
The AT49LV002NT-12TC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in 3 V embedded systems where firmware integrity, field upgradeability, and low-power retention are critical.
FAQ
What is the boot block address range for AT49LV002NT-12TC?
The boot block for AT49LV002NT-12TC occupies addresses 3C000H to 3FFFFH (16 KB), located at the top of the memory map. This top-aligned placement distinguishes it from variants like AT49LV002N, which use 00000H–03FFFH. The AT49LV002NT-12TC datasheet confirms this mapping in Section 6 and the Block Diagram on page 2.
Does AT49LV002NT-12TC support 12 V RESET override for boot block reprogramming?
Yes, AT49LV002NT-12TC supports 12 V ± 0.5 V applied to the RESET pin during chip erase, sector erase, or byte programming to temporarily disable boot block lockout. This feature is explicitly documented in the "Boot Block Programming Lockout Override" section (page 4) and applies to all (N)(T) and (NT) variants, unlike the (N)T-only footnote exclusions.
What package type and pin count does AT49LV002NT-12TC use?
AT49LV002NT-12TC uses a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 mm × 20 mm), designated as package code "32T" in Atmel's ordering information (page 20). It is pin-compatible with other 32-pin Flash memories using standard JEDEC TSOP-32 footprints.
How is end-of-program detection implemented in AT49LV002NT-12TC?
AT49LV002NT-12TC provides two hardware-supported 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, then stabilizes). Both are usable at any time during the cycle and eliminate need for fixed tBP delays in host firmware.
What is the maximum number of program/erase cycles guaranteed for AT49LV002NT-12TC?
The AT49LV002NT-12TC guarantees a minimum of 10,000 program/erase cycles per memory location, as specified in the "Features" section (page 1) and confirmed in the "DC and AC Operating Range" table (page 7). This endurance rating applies across the full commercial and industrial temperature ranges.
AT49LV002NT-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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49LV002NT-12TC FAQ
1.How can I place an order for AT49LV002NT-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002NT-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 AT49LV002NT-12TC reliable?
The price and inventory of AT49LV002NT-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002NT-12TC is usually 5 days.
3.What payment methods are accepted for AT49LV002NT-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002NT-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002NT-12TC?
AT49LV002NT-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002NT-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 AT49LV002NT-12TC?
For technical support, including AT49LV002NT-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002NT-12TC requirements.
6.How does Aetrix verify that AT49LV002NT-12TC is sourced from the original manufacturer or authorized distributors?
All AT49LV002NT-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 AT49LV002NT-12TC meets industry standards.
7.What is the process for return or replacement of AT49LV002NT-12TC?
All AT49LV002NT-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002NT-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 AT49LV002NT-12TC part is unused and in its original packaging.
Return procedure for AT49LV002NT-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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