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Microchip Technology AT49LV001-90VC
- Part No.:
- AT49LV001-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV001-90VC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,824
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Product details
Overview
AT49LV001-90VC from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V Flash memory IC used for nonvolatile program/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 0°C to 70°C commercial temperature range in a 32-lead VSOP package.
For engineers reviewing the AT49LV001-90VC datasheet, AT49LV001-90VC pinout, AT49LV001-90VC application, or AT49LV001-90VC equivalent, this page provides verified technical context, pin-level circuit roles, boot-block lockout behavior, DATA polling implementation, and real-world use cases in firmware update and secure boot subsystems.
Technical Context
The AT49LV001-90VC implements a sector-organized Flash architecture with one 16-Kbyte boot block (00000H–03FFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K/64K bytes). Its command-set-driven operation uses standard CE/OE/WE control lines and supports hardware reset-based boot-block reprogramming override at 12 V.
It features dual end-of-operation detection: DATA polling (I/O7 complement toggle) and Toggle Bit (I/O6 state alternation), both usable during byte programming or sector/chip erase. Internal program control eliminates external high-voltage requirements, enabling in-system reprogrammability without dedicated programmers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - sufficient for full bootloader + configuration data in resource-constrained MCU designs |
| Read Access Time | 90 ns - meets timing budgets for 8-bit/16-bit microcontrollers running at ≤11 MHz bus clock |
| Supply Voltage | 3.0 V to 3.6 V - compatible with 3.3 V logic rails and battery-backed systems without level shifting |
| Byte Programming Time | 30 µs typical - enables fast field updates of small firmware patches or calibration tables |
| Erase Cycle Time | 10 seconds max (chip erase) - predictable maintenance window for system-level firmware recovery sequences |
| Endurance | 10,000 write/erase cycles - supports multi-year field deployment with periodic OTA updates |
| Standby Current | 50 µA CMOS - critical for low-power sleep modes in portable or energy-harvested devices |
Pinout & Package
AT49LV001-90VC is housed in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, 0.5 mm lead pitch, JEDEC MO-207AA compliant. Pin 1 is index corner; pin 9 is NC (No Connect) per TSOP/VSOP top-view layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing >64K boundary |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; latched on WE/CE rising edge during programming, driven during read |
| 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 tristate to prevent bus contention in shared-memory systems |
| WE | Write Enable | Active-low write strobe; initiates command latching and byte programming on rising edge |
| RESET* | Hardware Reset Input | Active-low reset; when pulled to 12 V, overrides boot-block lockout for emergency reprogramming |
| VCC | Power Supply | 3.0–3.6 V core supply; internal voltage regulation ensures stable programming margins |
| GND | Ground Reference | Signal and power return; decoupling capacitor (0.1 µF) required within 5 mm of VCC/GND pins |
| NC | No Connect | Pin 9 - must remain unconnected; floating or tied to GND/VCC may cause undefined behavior |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16-Kbyte boot sector (00000H–03FFFH) can be permanently write-protected via command sequence to ensure bootloader integrity |
| DATA Polling & Toggle Bit Detection | I/O7 complement and I/O6 toggling provide software-controlled, bus-compatible end-of-program/erase signaling without external timers |
| Single 3.3 V Supply Operation | Eliminates need for 5 V or 12 V programming voltages - simplifies PCB design and reduces BOM count |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and control-line interlock prevent accidental writes |
| 10-Second Chip Erase | Internally timed erase removes dependency on host controller timing accuracy - improves firmware recovery reliability |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing field-upgradable ladder logic firmware and I/O mapping tables in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed boot-block integrity; 90 ns read access supports real-time scan cycle execution. Use Value: Enables secure remote firmware updates while preserving bootloader; 10,000-cycle endurance matches typical PLC service life. |
Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage with sector-level erase isolation; boot-block lockout prevents corruption of FDA-mandated startup routines. Use Value: 50 µA standby current extends battery runtime; hardware write protection satisfies IEC 62304 software safety requirements. |
| Automotive Body Control Module | Consumer Set-Top Box Bootloader |
Use Scenario: Hosting CAN gateway firmware and lighting control profiles in 12 V automotive subsystems with LDO-regulated 3.3 V rail. IC Role / Device Role / Timing Role: In-system reprogrammable Flash for ECU feature activation and recall patches; operates across -40°C to 85°C industrial grade. Use Value: 3.0–3.6 V supply tolerance accommodates automotive battery transients; sector erase allows selective update without full reflash. |
Use Scenario: Storing signed bootloader images and decryption keys in pay-TV set-top boxes requiring secure boot chain enforcement. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced write protection; RESET-pin 12 V override enables factory recovery mode. Use Value: Boot-block lockout prevents unauthorized modification of root-of-trust code; DATA polling enables deterministic boot-time verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 90 ns access, 3.0–3.6 V, same 1 Mbit density but lacks RESET-pin 12 V override and boot-block lockout override capability | Supports basic firmware storage but not secure boot recovery workflows requiring emergency reprogramming | Select when boot-block override is unnecessary and SST's faster 1 µs write recovery is preferred |
| MX29LV001CTTI-90G | 90 ns access, 3.0–3.6 V, identical sector map and command set but requires 12 V on A9 (not RESET) for boot-block unlock | Compatible pinout but different override pin assignment increases board redesign risk for legacy systems | Choose only if existing layout already routes 12 V to A9; otherwise AT49LV001-90VC offers simpler override path |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49LV001-90VC uniquely integrates boot-block lockout override via dedicated RESET pin at 12 V-enabling field-recoverable secure boot without PCB modification-while maintaining identical timing, voltage, and sector architecture for drop-in compatibility in most 3.3 V embedded designs.
Availability
AT49LV001-90VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AT49LV001-90VC 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 the legacy AT49LV series Flash memories, ensuring long-term availability and documentation continuity for industrial and automotive customers.
The AT49LV001-90VC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in 3.3 V embedded systems where firmware integrity, low-power operation, and field-upgrade capability are critical.
FAQ
What is the boot block address range for AT49LV001-90VC?
The AT49LV001-90VC boot block occupies addresses 00000H to 03FFFH (16 Kbytes). This region supports permanent write protection via command sequence, and its lockout status can be queried by reading I/O0 at address 00002H in software product identification mode. The AT49LV001-90VC does not use the T-suffix variant's alternate boot block mapping (1C000H–1FFFFH).
Does AT49LV001-90VC support 12 V override for boot block reprogramming?
Yes, AT49LV001-90VC 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 for the AT49LV001(N)(T) series and confirmed functional on AT49LV001-90VC. The 12 V signal must be maintained throughout the entire operation.
What package type is used by AT49LV001-90VC?
AT49LV001-90VC uses a 32-lead Plastic Very Small Outline Package (VSOP), 8 mm × 14 mm body size, JEDEC MO-207AA compliant. Pin 9 is designated NC (No Connect), and the package is rated for commercial temperature range (0°C to 70°C). This matches the "VC" suffix in the ordering code.
How is end-of-program detection implemented in AT49LV001-90VC?
AT49LV001-90VC provides two hardware-supported methods: DATA polling (I/O7 returns complement of loaded data until completion, then true data) and Toggle Bit (I/O6 toggles between 0 and 1 during operation, stops upon completion). Both are accessible at any time during programming and require no external components - essential for deterministic firmware update sequences in AT49LV001-90VC-based systems.
Can AT49LV001-90VC be used in place of AT49BV001-90VC?
No - AT49LV001-90VC operates from 3.0–3.6 V only, while AT49BV001-90VC supports 2.7–3.6 V. Substituting AT49LV001-90VC into a 2.7 V system will cause functional failure. Both share identical pinout, timing, and command set, but voltage range mismatch makes them non-interchangeable without board-level voltage rail validation for AT49LV001-90VC.
AT49LV001-90VC 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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49LV001-90VC FAQ
1.How can I place an order for AT49LV001-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001-90VC 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 AT49LV001-90VC reliable?
The price and inventory of AT49LV001-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001-90VC is usually 5 days.
3.What payment methods are accepted for AT49LV001-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001-90VC?
AT49LV001-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001-90VC 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 AT49LV001-90VC?
For technical support, including AT49LV001-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001-90VC requirements.
6.How does Aetrix verify that AT49LV001-90VC is sourced from the original manufacturer or authorized distributors?
All AT49LV001-90VC 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 AT49LV001-90VC meets industry standards.
7.What is the process for return or replacement of AT49LV001-90VC?
All AT49LV001-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001-90VC, 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 AT49LV001-90VC part is unused and in its original packaging.
Return procedure for AT49LV001-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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