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Microchip Technology AT49LV002T-70VC
- Part No.:
- AT49LV002T-70VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV002T-70VC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,657
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Product details
Overview
AT49LV002T-70VC 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 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across commercial temperature range (0°C to 70°C) in a 32-lead VSOP package.
For engineers reviewing the AT49LV002T-70VC datasheet, AT49LV002T-70VC pinout, AT49LV002T-70VC application, or AT49LV002T-70VC equivalent, key selection criteria include boot-block lockout capability (3C000H–3FFFFH), DATA polling/Toggle Bit end-of-write detection, hardware write protection, and compatibility with standard EPROM-like bus interface timing.
Technical Context
This Flash memory implements a sector-based architecture with one 16 KB boot block (address 3C000H–3FFFFH), two 8 KB parameter blocks (3A000H–3BFFFH and 38000H–39FFFH), and two main memory blocks (20000H–37FFFH and 00000H–1FFFFH). It uses standard CE/OE/WE control logic and supports command sequences via address/data latching on WE/CE edges.
It features internal program control with automatic pulse generation, hardware data protection (VCC sense, noise filtering, and input-level inhibition), and dual end-of-operation detection via DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling). The RESET pin enables boot-block override at 12 V and system reset functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits |
| Read Access Time | 70 ns - enables direct replacement of 70 ns EPROMs without timing redesign |
| Supply Voltage | 3.0 V to 3.6 V - single 3.3 V rail operation, no 5 V required |
| Byte Programming Time | 30 µs typical - supports fast field updates and incremental firmware patches |
| Erase Cycle Time | 10 seconds max - full-chip or sector-erase with no external timing circuitry |
| End-of-Write Detection | DATA polling (I/O7) and Toggle Bit (I/O6) - eliminates need for fixed delay timers in host firmware |
| Boot Block Protection | 16 KB region (3C000H–3FFFFH) with programmable lockout - secures bootloader code against accidental overwrite |
Pinout & Package
AT49LV002T-70VC is housed in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, with gull-wing leads and standard JEDEC MO-178 footprint. Pin 1 is located at bottom-left corner when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A17 map directly to memory location |
| I/O0–I/O7 | Data Input/Output | Bi-directional 8-bit data bus; supports byte-wide reads/writes and status polling on I/O6/I/O7 |
| 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 control; enables data bus drivers during read cycles only |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot-block override |
| VCC | Power Supply | +3.0 V to +3.6 V supply; powers core logic and I/O buffers |
| GND | Ground | Reference return path for all signals and power; requires low-impedance PCB connection |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables secure bootloader storage (3C000H–3FFFFH) that remains protected even after field firmware updates to other sectors |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and CE/OE/WE state enforcement prevent spurious writes |
| DATA Polling & Toggle Bit | Allows host MCU to poll I/O7 or I/O6 instead of using fixed delays-reducing firmware overhead and improving write reliability |
| Single 3.3 V Operation | Eliminates need for 5 V or 12 V programming supplies; compatible with modern low-voltage embedded systems |
| 10,000 Program/Erase Cycles | Supports long-term field maintenance and iterative firmware development without premature wear-out |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing and updating firmware for programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides 70 ns read timing for real-time instruction fetch and sector-erase isolation for safe firmware patching. Use Value: Enables remote firmware upgrades without removing the module; boot-block lockout ensures critical startup code remains intact during field updates. |
Use Scenario: Holding certified bootloader and calibration data in Class II medical instruments requiring traceable, tamper-resistant memory with lifecycle validation. IC Role / Device Role / Timing Role: Secure, write-protected nonvolatile memory; 3.3 V operation aligns with low-power medical SoCs; 10,000-cycle endurance supports multi-year device service life. Use Value: Prevents unauthorized modification of boot code via hardware lockout and 12 V RESET override for authorized recovery-meeting IEC 62304 traceability requirements. |
| Automotive Infotainment Head Unit | Network Router Configuration Storage |
Use Scenario: Storing UI assets, localization strings, and firmware images in automotive-grade infotainment units deployed across temperature ranges up to 85°C. IC Role / Device Role / Timing Role: Code/data Flash memory with industrial temp rating (−40°C to +85°C); 70 ns access supports responsive GUI rendering from local storage. Use Value: Sector erase allows partial updates (e.g., language packs) without disrupting active navigation or audio subsystems-minimizing downtime. |
Use Scenario: Retaining configuration profiles, MAC tables, and failover scripts in enterprise-grade network routers requiring persistent, field-upgradable storage. IC Role / Device Role / Timing Role: Parameter and configuration storage with dual 8 KB parameter blocks (3A000H–3BFFFH and 38000H–39FFFH) for A/B versioning. Use Value: Enables atomic configuration swaps and rollback via independent parameter block erasure-eliminating risk of corrupted runtime state during update. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-NHE | 2 Mbit, 70 ns, 3.0–3.6 V; lacks boot-block lockout and 12 V RESET override | No hardware-enforced bootloader protection; relies on software-only write disable schemes | Choose when boot security is managed externally and cost is prioritized over hardware lockout |
| MX29LV200CTTI-70G | 2 Mbit, 70 ns, 3.0–3.6 V; includes CFI-compliant command set but different sector map (32 KB boot) | Boot sector starts at 00000H (not 3C000H); incompatible address mapping for legacy AT49LV002T-70VC designs | Choose for new designs needing CFI compliance and broader toolchain support-but requires PCB and firmware adaptation |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CTTI-70G, the AT49LV002T-70VC uniquely offers 16 KB boot-block lockout at 3C000H with 12 V RESET override, enabling secure, field-recoverable bootloader storage without software dependency or layout changes.
Availability
AT49LV002T-70VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive infotainment head unit applications requiring stable component supply, long-lifecycle support, and verified Flash memory performance.
Supply support for AT49LV002T-70VC 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, Flash, and security solutions for embedded markets.
The AT49LV002T-70VC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable, low-voltage in-system reprogramming in space-constrained embedded systems where 3.3 V operation and sector-level data integrity are critical.
FAQ
What is the boot block address range for AT49LV002T-70VC?
The boot block for AT49LV002T-70VC occupies addresses 3C000H to 3FFFFH (16 KB). This differs from the base AT49LV002(N) variant, which places the boot block at 00000H–03FFFH. The relocated boot sector enables flexible memory mapping for systems requiring top-of-memory bootloader placement, and is confirmed in the AT49BV/LV002(N)(T) datasheet revision 0982D, page 4 and 6.
Does AT49LV002T-70VC support 12 V programming voltage?
No, AT49LV002T-70VC operates exclusively from a 3.0–3.6 V supply and does not require or accept 12 V for normal programming. However, applying 12.0 V ± 0.5 V to the RESET pin during erase or program cycles overrides the boot block lockout feature-this is a dedicated recovery mechanism, not a programming voltage. All standard byte programming and sector erases use only the 3.3 V VCC rail.
How is end-of-program detection implemented in AT49LV002T-70VC?
AT49LV002T-70VC provides two hardware-supported methods: DATA polling (reading the programmed byte yields its complement on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during operation and stabilizes upon completion). Both methods eliminate reliance on fixed timing delays and are fully documented in the AC Characteristics section (page 12) of the datasheet.
What package type and dimensions does AT49LV002T-70VC use?
AT49LV002T-70VC uses a 32-lead Very Small Outline Package (VSOP) per JEDEC MO-178, measuring 8 mm × 14 mm with 0.5 mm lead pitch. It is distinct from PLCC (32J), PDIP (32P6), and TSOP (32T) variants-confirmed in the AT49LV002 Ordering Information table (page 15) where "VC" suffix denotes VSOP packaging.
Can AT49LV002T-70VC be used as a direct replacement for AT49LV002-70VC?
No-AT49LV002T-70VC is not a pin-compatible or functional drop-in replacement for AT49LV002-70VC. The "T" suffix indicates a top-boot architecture (boot block at 3C000H), whereas the non-T version uses bottom-boot (00000H). Address mapping, sector erase commands, and bootloader initialization logic differ; firmware and hardware design must be validated for the specific variant.
AT49LV002T-70VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm 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:
- 70 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49LV002T-70VC FAQ
1.How can I place an order for AT49LV002T-70VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002T-70VC 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 AT49LV002T-70VC reliable?
The price and inventory of AT49LV002T-70VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002T-70VC is usually 5 days.
3.What payment methods are accepted for AT49LV002T-70VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002T-70VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002T-70VC?
AT49LV002T-70VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002T-70VC 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 AT49LV002T-70VC?
For technical support, including AT49LV002T-70VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002T-70VC requirements.
6.How does Aetrix verify that AT49LV002T-70VC is sourced from the original manufacturer or authorized distributors?
All AT49LV002T-70VC 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 AT49LV002T-70VC meets industry standards.
7.What is the process for return or replacement of AT49LV002T-70VC?
All AT49LV002T-70VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002T-70VC, 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 AT49LV002T-70VC part is unused and in its original packaging.
Return procedure for AT49LV002T-70VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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