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Microchip Technology AT49LV040-70VI
- Part No.:
- AT49LV040-70VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV040-70VI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,473
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Product details
Overview
AT49LV040-70VI from Atmel is a 4-megabit (512K × 8) single-voltage Flash memory IC operating at 3.0V–3.6V, featuring 70 ns read access time, 16 KB boot block with programmable lockout, and 10,000 write/erase cycles. It serves as nonvolatile program storage in embedded microcontroller systems requiring in-system reprogrammability without high-voltage programming.
For engineers reviewing the AT49LV040-70VI datasheet, AT49LV040-70VI pinout, AT49LV040-70VI application, or AT49LV040-70VI equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), VSOP/TSOP-32 package compatibility, boot sector protection logic, and software-controlled chip erase timing.
Technical Context
The AT49LV040-70VI implements a CMOS-based NOR Flash architecture with hardware data protection (VCC sense, noise filtering, and control-line inhibit), internal program timer, and dual-cycle command interface for byte programming and chip erase. Its boot block resides at addresses 00000H–03FFFH and supports optional permanent write lockout via six-byte software sequence.
Read operation mirrors EPROM behavior: CE and OE low with WE high enables output drive; bus contention is prevented by independent CE/OE gating. Programming requires no external high voltage-only standard 3.0V–3.6V supply-and uses Data Polling (I/O7 complement) or Toggle Bit (I/O6 toggling) for cycle completion detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8), enabling full firmware image storage for 8-bit MCUs |
| Read Access Time | 70 ns max - meets real-time boot code fetch timing in 12 MHz+ systems |
| Supply Voltage | 3.0V–3.6V - compatible with standard 3.3V logic rails and battery-backed operation |
| Boot Block Size | 16 KB (00000H–03FFFH) - sufficient for secure bootloader code with lockout enforcement |
| Byte Program Time | 30 µs typical - allows rapid field updates without system interruption |
| Chip Erase Time | 10 seconds max - deterministic full-array reset for firmware recovery |
| Endurance | 10,000 write/erase cycles - supports multi-year field upgrade cycles |
| Standby Current | 50 µA CMOS - critical for low-power battery-operated devices |
Pinout & Package
AT49LV040-70VI is available in 32-lead VSOP (8 × 14 mm) and TSOP (8 × 20 mm) packages, both RoHS-compliant and rated for industrial temperature operation (−40°C to +85°C). Pin compatibility is maintained across PLCC, TSOP, and VSOP variants per JEDEC MO-142 BA outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0 least significant |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; supports byte-level read/write without external latches |
| CE | Chip Enable | Active-low global select; must be stable before address setup for valid access |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low control for programming/erase; latches address/data on falling/rising edges |
| VCC | Power Supply | 3.0V–3.6V input; powers core logic and I/O buffers; VCC sense disables writes below 1.8V |
| GND | Ground Reference | Signal and power return; decoupling capacitor required within 10 mm of VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.0V–3.6V Supply | Eliminates need for charge pumps or external 12V programming voltage, simplifying PCB design |
| Boot Block Lockout | Software-enabled permanent write protection for 16 KB region, preventing accidental bootloader corruption |
| Data Polling & Toggle Bit | Dual asynchronous methods to detect program/erase completion without polling timers or external clocks |
| Hardware Data Protection | VCC under-voltage lockout, noise-filtered WE/CE inputs, and control-line inhibit prevent spurious writes |
| Industrial Temperature Range | Rated −40°C to +85°C case temperature, validated for use in automotive ECUs and industrial controllers |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing fast 70 ns read access for deterministic boot execution and runtime code fetch. Use Value: 16 KB boot block lockout ensures bootloader integrity across 10,000 field updates, while 50 µA standby current extends uptime in battery-buffered systems. | Use Scenario: Hosting secure bootloader code in engine control units where firmware must survive vibration, thermal cycling, and electrical transients. IC Role / Device Role / Timing Role: Trusted boot memory with hardware write protection and VCC-sense disable, preventing corruption during brown-out conditions. Use Value: Industrial temperature rating (−40°C to +85°C) and 10-second chip erase enable safe over-the-air firmware recovery in vehicle networks. |
| Medical Device Configuration Memory | Networking Equipment BIOS Storage |
Use Scenario: Retaining calibration data, user preferences, and safety-critical configuration settings in portable diagnostic instruments. IC Role / Device Role / Timing Role: Reliable parameter storage with 10,000 endurance cycles and 50 µA CMOS standby, minimizing power draw during sleep modes. Use Value: Boot block lockout prevents unauthorized modification of FDA-regulated startup routines, supporting regulatory compliance. | Use Scenario: Holding BIOS/UEFI firmware in enterprise switches and routers requiring field-upgradable boot code. IC Role / Device Role / Timing Role: High-reliability Flash memory supporting in-system reprogramming via JTAG or serial interface without board removal. Use Value: Software-controlled chip erase and byte programming allow partial firmware patches, reducing downtime during network maintenance windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF040-70-4C-NHE | 4 Mbit, 70 ns, 3.0V–3.6V, but lacks dedicated boot block lockout; uses uniform 4 KB sectors | No hardware-enforced bootloader protection; requires external logic or firmware to emulate lockout | Select when boot block granularity is not required and cost-per-Mbit is prioritized |
| MX29LV040CTTI-70G | 4 Mbit, 70 ns, 3.0V–3.6V, includes 16 KB boot sector but uses different command set (AMD-style vs Atmel) | Requires redesign of firmware update routines due to incompatible unlock/lock sequences | Select only if existing AMD-compatible toolchain and host controller support are already in place |
Compared with SST39VF040-70-4C-NHE and MX29LV040CTTI-70G, the AT49LV040-70VI provides unique hardware-enforced boot block lockout with Atmel's documented six-byte enable sequence, ensuring bootloader integrity without software overhead or external components.
Availability
AT49LV040-70VI is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical diagnostics, networking equipment, and embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49LV040-70VI 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
Atmel Corporation, now part of Microchip Technology, is a semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49BV/LV040 product line was designed specifically for embedded systems requiring reliable, low-voltage in-system programmable Flash memory with integrated bootloader protection and industrial-grade reliability.
FAQ
What is the operating temperature range for the AT49LV040-70VI?
The AT49LV040-70VI is rated for industrial temperature operation from −40°C to +85°C. This specification applies to the case temperature under continuous operation and is validated per Atmel's DC and AC characterization data. The AT49LV040-70VI maintains full functionality-including 70 ns read access, 30 µs byte programming, and boot block lockout-at all points within this range.
Does the AT49LV040-70VI require high-voltage programming signals?
No, the AT49LV040-70VI operates exclusively from a single 3.0V–3.6V supply for both read and write operations. It uses internally generated programming voltages and does not require external 12V or 5V pulses. All commands-including chip erase, byte programming, and boot block lockout-are executed using standard logic-level signals applied to CE, OE, WE, and address/data pins.
How is the boot block protected on the AT49LV040-70VI?
The AT49LV040-70VI features a 16 KB boot block (addresses 00000H–03FFFH) that can be permanently locked against programming and erasure using a six-byte software command sequence. Once enabled, the lockout cannot be reversed. The AT49LV040-70VI supports software detection of lockout status via Product Identification mode reading I/O0 at address 00002H.
What package types are available for the AT49LV040-70VI?
The AT49LV040-70VI is offered in three industry-standard 32-pin packages: PLCC (32J), TSOP (32T, 8 × 20 mm), and VSOP (32V, 8 × 14 mm). All share identical pinout and electrical characteristics. The "VI" suffix denotes industrial temperature rating and VSOP packaging per Atmel's ordering information table.
Can the AT49LV040-70VI be used as a direct replacement for the AT49BV040-70VI?
No-the AT49LV040-70VI and AT49BV040-70VI differ in minimum supply voltage: AT49LV040-70VI requires 3.0V–3.6V, while AT49BV040-70VI supports 2.7V–3.6V. Systems operating near 2.7V–2.99V may fail to program or read reliably with the AT49LV040-70VI. Other timing and command-set parameters are identical, but voltage compatibility must be verified per application.
AT49LV040-70VI 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:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49LV040-70VI FAQ
1.How can I place an order for AT49LV040-70VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV040-70VI 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 AT49LV040-70VI reliable?
The price and inventory of AT49LV040-70VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV040-70VI is usually 5 days.
3.What payment methods are accepted for AT49LV040-70VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV040-70VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV040-70VI?
AT49LV040-70VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV040-70VI 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 AT49LV040-70VI?
For technical support, including AT49LV040-70VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV040-70VI requirements.
6.How does Aetrix verify that AT49LV040-70VI is sourced from the original manufacturer or authorized distributors?
All AT49LV040-70VI 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 AT49LV040-70VI meets industry standards.
7.What is the process for return or replacement of AT49LV040-70VI?
All AT49LV040-70VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV040-70VI, 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 AT49LV040-70VI part is unused and in its original packaging.
Return procedure for AT49LV040-70VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV040-70VI Tags
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