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Microchip Technology AT49LV040-70JI
- Part No.:
- AT49LV040-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LV040-70JI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,033
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Product details
Overview
AT49LV040-70JI 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, 10-second chip erase, and 30 µs/byte programming. It integrates a 16 KB boot block with programmable lockout and supports in-system reprogramming without high-voltage inputs. Used for firmware storage in industrial microcontroller boot loaders.
For engineers reviewing the AT49LV040-70JI datasheet, AT49LV040-70JI pinout, AT49LV040-70JI application, or AT49LV040-70JI equivalent, key selection criteria include boot-sector protection, 70 ns timing compliance, industrial temperature range (−40°C to +85°C), PLCC-32 package compatibility, and hardware data protection via VCC sense and noise filtering.
Technical Context
The AT49LV040-70JI implements a standard NOR Flash architecture with address latching on the falling edge of WE or CE (whichever occurs last) and data latching on the rising edge (whichever occurs first). Its internal command register executes byte-program and chip-erase sequences using six-byte software codes.
It supports dual-line control logic (CE/OE) for bus contention prevention, Data Polling (I/O7 complement detection), and Toggle Bit (I/O6 toggling) for program/erase cycle completion monitoring. Boot block lockout is enabled via a specific six-command sequence targeting addresses 5555H/2AAAH/5555H with data AAH/55H/40H.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8), enabling full firmware image storage for mid-complexity embedded controllers. |
| Read Access Time | 70 ns max - meets timing requirements for 14 MHz bus interfaces without wait states. |
| VCC Operating Range | 3.0V to 3.6V - compatible with regulated 3.3V systems and eliminates need for separate programming voltage rails. |
| Chip Erase Time | 10 seconds typical - enables rapid field firmware updates without extended downtime. |
| Byte Programming Time | 30 µs typical - supports efficient incremental code patching during development or maintenance. |
| Endurance | 10,000 write/erase cycles - sufficient for firmware update cycles over 5+ years in industrial deployments. |
| Standby Current | 50 µA CMOS - reduces power budget impact in always-on or battery-backed applications. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade operation in harsh environments. |
Pinout & Package
AT49LV040-70JI is packaged in a 32-lead Plastic J-leaded Chip Carrier (PLCC), measuring 18.5 mm × 18.5 mm with J-bend leads. The package is lead-free compliant and rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 524,288-word addressing; A0–A15 used for main array, A16–A18 extend to boot block. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; inhibits programming when high. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high to prevent bus contention. |
| WE | Write Enable | Active-low write control; latches address/data edges for programming; inhibits writes when high. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output and program data input; supports Data Polling on I/O7 and Toggle Bit on I/O6. |
| VCC | Power Supply | 3.0V–3.6V supply; internal VCC sense disables programming if below 1.8V typical. |
| GND | Ground Reference | Signal and power ground reference for all logic and I/O operations. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB (00000H–03FFFH) permanently protected after activation - secures bootloader code against accidental overwrite. |
| Data Polling | I/O7 returns complement of programmed byte until completion - enables polling-based firmware update without timers or interrupts. |
| Hardware Data Protection | VCC sense, OE/CE/WE logic inhibition, and 15 ns noise filter - prevents spurious writes during power transients or EMI events. |
| Software Command Set | Six-byte chip erase and four-byte byte program sequences - eliminates need for external high-voltage generators or dedicated programmers. |
| Industrial Temperature Range | −40°C to +85°C operation - ensures reliable firmware storage in factory automation, motor drives, and outdoor equipment. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
|
Use Scenario: Storing certified bootloader and safety-critical firmware in programmable logic controllers deployed in factory floors with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with guaranteed boot sector integrity and 70 ns read latency for deterministic startup. Use Value: Boot block lockout prevents unauthorized or erroneous firmware modification, while 10,000-cycle endurance supports long-term field updates without hardware replacement. |
Use Scenario: Holding FDA-approved boot code and calibration data in portable diagnostic instruments requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: Secure, low-power Flash memory with hardware write protection and industrial temperature qualification. Use Value: 50 µA standby current extends battery life between calibrations; VCC-sense protection ensures data integrity during brown-out conditions. |
| Automotive Body Control Module | Telecom Remote Terminal Firmware |
|
Use Scenario: Storing configuration and feature-enable bits in body control units where EEPROM wear-out is a concern. IC Role / Device Role / Timing Role: High-endurance Flash replacing EEPROM for infrequent but critical parameter updates. Use Value: 10,000-cycle rating exceeds automotive lifetime requirements; 3.0V–3.6V operation matches vehicle 3.3V rail without level-shifting. |
Use Scenario: Hosting field-upgradable protocol stack firmware in outdoor DSLAM line cards exposed to thermal cycling. IC Role / Device Role / Timing Role: Industrial-grade Flash memory supporting remote in-system reprogramming over backhaul links. Use Value: 10-second chip erase enables fast firmware rollbacks; PLCC-32 package offers mechanical robustness for vibration-prone telecom enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-NHE | 4 Mbit, 70 ns, 3.0V–3.6V, PLCC-32, but lacks boot block lockout and uses different command set. | No hardware-enforced boot sector protection; requires software-managed write disable. | Select when boot security is managed externally and command compatibility with legacy SST39VF toolchains is required. |
| MX29LV400CBTI-70G | 4 Mbit, 70 ns, 3.0V–3.6V, TSOP-48 (not PLCC-32); includes bottom-boot block but uses different address mapping (00000H–00FFFH). | Requires PCB redesign due to 48-pin TSOP vs. 32-pin PLCC; boot block size and location differ. | Select only if board layout allows TSOP-48 and boot block address alignment matches system software. |
Compared with SST39VF400A-70-4C-NHE and MX29LV400CBTI-70G, the AT49LV040-70JI uniquely delivers PLCC-32 compatibility, verified 16 KB bottom-boot lockout with hardware activation, and Atmel's proven VCC-sense protection-making it optimal for industrial firmware storage where physical package and boot integrity are non-negotiable.
Availability
AT49LV040-70JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive body control module applications requiring stable component supply across extended lifecycles.
Supply support for AT49LV040-70JI 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, designs high-reliability nonvolatile memory and microcontroller solutions for industrial, automotive, and communications markets.
The AT49LV040-70JI belongs to Atmel's Battery-Voltage™ Flash family, engineered specifically for single-supply, in-system programmable firmware storage in resource-constrained embedded systems.
FAQ
What is the operating voltage range for the AT49LV040-70JI?
The AT49LV040-70JI operates within a strict 3.0V to 3.6V supply range. It does not support the wider 2.7V–3.6V range of the AT49BV040 variant. This narrower window ensures stable programming and read performance under regulated 3.3V system rails, and its internal VCC sense circuitry disables write operations if voltage drops below ~1.8V.
Does the AT49LV040-70JI support hardware write protection for the boot sector?
Yes, the AT49LV040-70JI includes a hardware-enforced boot block lockout feature for the 16 KB region (00000H–03FFFH). Once activated via the documented six-command sequence, the boot sector becomes permanently immune to erase and program commands - a critical safeguard for bootloader code integrity in safety-certified systems.
What package type is used for the AT49LV040-70JI?
The AT49LV040-70JI is supplied in a 32-lead Plastic J-leaded Chip Carrier (PLCC) package, per JEDEC MS-016 AE standard. Its 18.5 mm × 18.5 mm footprint and J-bend leads provide mechanical robustness and thermal cycling reliability suited for industrial PCB assemblies.
How is end-of-program detection implemented in the AT49LV040-70JI?
The AT49LV040-70JI supports two independent end-of-program detection methods: Data Polling (monitoring I/O7 for complement-to-data transition) and Toggle Bit (observing I/O6 toggling state). Both operate without external clocks and can be polled at any time during the 30 µs typical programming cycle.
Is the AT49LV040-70JI qualified for industrial temperature operation?
Yes, the AT49LV040-70JI is fully specified and tested for operation from −40°C to +85°C. This industrial temperature grade is confirmed by its "I" suffix in the ordering code and validated across all DC/AC parameters including 70 ns access time, 50 µA standby current, and 10,000-cycle endurance.
AT49LV040-70JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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-PLCC (13.97x11.43)
AT49LV040-70JI FAQ
1.How can I place an order for AT49LV040-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV040-70JI 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 AT49LV040-70JI reliable?
The price and inventory of AT49LV040-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV040-70JI is usually 5 days.
3.What payment methods are accepted for AT49LV040-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV040-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV040-70JI?
AT49LV040-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV040-70JI 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 AT49LV040-70JI?
For technical support, including AT49LV040-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV040-70JI requirements.
6.How does Aetrix verify that AT49LV040-70JI is sourced from the original manufacturer or authorized distributors?
All AT49LV040-70JI 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 AT49LV040-70JI meets industry standards.
7.What is the process for return or replacement of AT49LV040-70JI?
All AT49LV040-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV040-70JI, 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 AT49LV040-70JI part is unused and in its original packaging.
Return procedure for AT49LV040-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV040-70JI Tags
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