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Microchip Technology AT49LV002NT-12PC
- Part No.:
- AT49LV002NT-12PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49LV002NT-12PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,210
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Product details
Overview
AT49LV002NT-12PC from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 3.0–3.6 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, 10-second chip erase, byte-programmable architecture with sector protection, and operates across the industrial temperature range (−40°C to +85°C). It is commonly deployed in firmware boot storage for industrial controllers where reliable field-upgradable code retention is required.
For engineers reviewing the AT49LV002NT-12PC datasheet, AT49LV002NT-12PC pinout, AT49LV002NT-12PC application, or AT49LV002NT-12PC equivalent, key selection considerations include its 32-pin PDIP package, boot block lockout capability, DATA polling/Toggle Bit programming status detection, and compatibility with standard 5V-command logic interfaces despite 3.3V operation.
Technical Context
This device implements a command-register-based Flash architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its memory is partitioned into one 16K-byte boot block (address 3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K + 128K bytes), enabling selective erasure without disturbing protected firmware.
Hardware data protection includes VCC sense (<1.8 V inhibits programming), noise filtering on WE/CE (rejects <15 ns pulses), and control-line interlock (OE low, CE high, or WE high disables write cycles). The RESET pin supports both standard reset and 12 V override of boot block lockout - though this override is disabled on N-suffix variants, it remains functional on the NT variant per documentation.
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 MCU systems. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard 3.3 V logic rails and eliminates need for dual-voltage supply design. |
| Read Access Time | 120 ns - determines maximum instruction fetch rate when mapped into microcontroller address space. |
| Erase Cycle Time | 10 seconds (typical chip erase) - enables predictable firmware update latency during field reprogramming. |
| Byte Programming Time | 30 µs typical - allows fine-grained data updates without bulk-erase overhead. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - provides deterministic, hardware-verified completion signaling without timer polling. |
| Write Endurance | 10,000 program/erase cycles - qualifies for long-life industrial logging or infrequent firmware revision applications. |
Pinout & Package
AT49LV002NT-12PC uses a 32-lead, 0.600" wide plastic dual in-line package (PDIP), pin-compatible with industry-standard 32-pin Flash memory footprints. Pin 1 is A16; pin 9 is NC (not connected) per datasheet Rev. 0982D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A17 selects upper/lower half of memory map. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; supports byte-wide reads/writes and status polling via I/O6/I/O7. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device activation on shared bus. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during multi-device reads. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming cycles. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override (functional on NT variant). |
| VCC | Power Supply | +3.0 V to +3.6 V supply; powers core logic and memory array; internal regulation enables stable operation across voltage range. |
| GND | Ground | Reference return path for all signals and power; requires low-impedance connection to minimize noise coupling during erase/write. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte sector (3C000H–3FFFFH) can be permanently write-protected via command sequence - ensures bootloader integrity against accidental overwrite. |
| Sector Architecture | Independent 8K-byte parameter blocks and asymmetric main memory blocks (96K/128K) allow flexible firmware partitioning and wear leveling. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line interlock eliminate unintended writes due to power transients or signal glitches. |
| Low Power Standby | 50 µA CMOS standby current - enables battery-backed operation in always-on embedded systems with minimal quiescent drain. |
| Standard Command Interface | 5V-level command protocol (e.g., 5555H/2AAAH sequences) works with 3.3V I/O - simplifies integration with legacy 5V microcontrollers via level-shifter-free designs. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing certified bootloader and safety-critical initialization routines in programmable logic controllers subject to IEC 61508 SIL-2 requirements. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped at reset vector; provides deterministic execution start after power-on or watchdog reset. Use Value: Boot block lockout prevents unauthorized or erroneous modification of certified startup code, maintaining functional safety compliance. |
Use Scenario: Holding FDA-cleared firmware images and calibration data in portable diagnostic equipment requiring traceable field updates. IC Role / Device Role / Timing Role: Field-upgradable code storage with verified erase/program cycles; supports secure over-the-air (OTA) patch deployment. Use Value: 10,000-cycle endurance and DATA polling ensure reliable, verifiable firmware updates without risk of partial writes or silent corruption. |
| Automotive Body Control Module | Networking Equipment Configuration Store |
Use Scenario: Retaining vehicle-specific configuration tables (e.g., door lock timing, lighting profiles) in body control units operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-temp Flash memory interfaced to 8-bit/16-bit MCU via parallel bus; accessed during power-up initialization. Use Value: 120 ns access time meets real-time boot timing budgets; 3.0–3.6 V supply matches automotive LDO output rails. |
Use Scenario: Storing switch/router configuration parameters, MAC address tables, and fail-safe recovery images in enterprise networking hardware. IC Role / Device Role / Timing Role: Parameter block (8K × 2) stores volatile configuration; main memory holds firmware backup and recovery images. Use Value: Independent sector erase allows rapid config updates without disrupting active firmware, minimizing system downtime during provisioning. |
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, 2 Mbit, 70 ns access, 32-pin TSOP; no RESET pin or boot lockout override. | Lacks 12 V RESET override and boot block lockout - less suitable for safety-critical boot storage requiring guaranteed write protection. | Prefer when board space favors TSOP and boot protection is managed externally or not required. |
| MX29LV002CTTI-12 | 3.0–3.6 V, 2 Mbit, 120 ns, 32-pin PDIP; includes boot block lockout but no 12 V RESET override function. | Boot lockout is permanent once enabled; no hardware mechanism to recover locked boot sector if misconfigured. | Choose when strictest boot immutability is needed and field recovery via RESET override is unnecessary. |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49LV002NT-12PC uniquely combines industrial-temp PDIP packaging, 120 ns timing, and 12 V RESET-enabled boot block override - delivering both robust protection and field-recoverable security for mission-critical embedded firmware.
Availability
AT49LV002NT-12PC is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive electronics applications requiring stable component supply, long-term lifecycle support, and verified Flash memory performance under extended temperature operation.
Supply support for AT49LV002NT-12PC 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 AT49LV series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for embedded markets.
The AT49LV002NT-12PC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3.3 V embedded systems needing in-system reprogrammability, sector-level erase flexibility, and hardware-enforced boot code protection.
FAQ
What is the operating voltage range for the AT49LV002NT-12PC?
The AT49LV002NT-12PC operates from 3.0 V to 3.6 V DC. This single-supply range eliminates the need for separate programming voltages and aligns with standard 3.3 V logic systems. Operation below 3.0 V is inhibited by internal VCC sense circuitry to prevent unreliable writes, and the device guarantees full functionality-including 120 ns read access and 10-second erase-across the entire specified range.
Does the AT49LV002NT-12PC support boot block protection, and how is it enabled?
Yes, the AT49LV002NT-12PC includes a 16K-byte boot block (3C000H–3FFFFH) with programmable lockout. Protection is enabled via a six-cycle command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Once activated, the boot block cannot be erased or programmed using ≤5.5 V inputs - ensuring firmware integrity while allowing main memory updates. The AT49LV002NT-12PC retains the 12 V RESET override capability to recover the boot block if needed.
What package type and pin count does the AT49LV002NT-12PC use?
The AT49LV002NT-12PC uses a 32-lead, 0.600" wide plastic dual in-line package (PDIP), designated as package code 32P6. Pin 1 is A16; pin 9 is NC (not connected), consistent with the AT49BV/LV002(N)(T) family specification. This through-hole package supports manual prototyping, legacy board designs, and high-reliability industrial assemblies where surface-mount alternatives may be unsuitable.
How does the AT49LV002NT-12PC indicate completion of a byte programming cycle?
The AT49LV002NT-12PC provides two hardware methods: DATA polling and Toggle Bit detection. During programming, reading the last written byte returns the complement on I/O7; when complete, true data appears. Alternatively, I/O6 toggles between 0 and 1 during the cycle and stops upon completion. Both methods eliminate need for fixed delay timers and enable precise, clock-independent synchronization in real-time firmware update routines.
Is the AT49LV002NT-12PC compatible with 5 V microcontrollers?
Yes - although the AT49LV002NT-12PC operates on 3.0–3.6 V, its command interface accepts 5 V logic levels (e.g., 5555H addresses, AAH/55H data) without external level shifters. Input thresholds (VIH = 2.0 V, VIL = 0.6 V) and 5 V-tolerant OE pin (−0.6 V to +13.5 V) ensure robust interoperability with legacy 5 V MCUs. However, VCC must remain within 3.0–3.6 V; applying 5 V to VCC will damage the AT49LV002NT-12PC.
AT49LV002NT-12PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49LV002NT-12PC FAQ
1.How can I place an order for AT49LV002NT-12PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002NT-12PC 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-12PC reliable?
The price and inventory of AT49LV002NT-12PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002NT-12PC is usually 5 days.
3.What payment methods are accepted for AT49LV002NT-12PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002NT-12PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002NT-12PC?
AT49LV002NT-12PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002NT-12PC 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-12PC?
For technical support, including AT49LV002NT-12PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002NT-12PC requirements.
6.How does Aetrix verify that AT49LV002NT-12PC is sourced from the original manufacturer or authorized distributors?
All AT49LV002NT-12PC 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-12PC meets industry standards.
7.What is the process for return or replacement of AT49LV002NT-12PC?
All AT49LV002NT-12PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002NT-12PC, 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-12PC part is unused and in its original packaging.
Return procedure for AT49LV002NT-12PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV002NT-12PC Tags
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