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Microchip Technology AT49LV040-90TI
- Part No.:
- AT49LV040-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV040-90TI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,246
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Product details
Overview
AT49LV040-90TI 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 hardware lockout and supports in-system reprogramming without high-voltage inputs. Used for firmware storage in industrial microcontroller-based systems requiring reliable nonvolatile code retention.
For engineers reviewing the AT49LV040-90TI datasheet, AT49LV040-90TI pinout, AT49LV040-90TI application, or AT49LV040-90TI equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), TSOP-32 (8 × 14 mm) or PLCC-32 package compatibility, boot-block write protection, Data Polling/Toggle Bit program status detection, and 10,000 write/erase cycle endurance.
Technical Context
The AT49LV040-90TI implements a CMOS-based NOR Flash architecture with internal command register control, enabling byte-level programming and full-chip erase via six-byte software sequences. Its dual-line chip enable (CE) and output enable (OE) logic allows flexible bus interface design while preventing contention.
It features hardware data protection including VCC sense (<1.8V inhibit), noise filtering on WE/CE (<15 ns pulse rejection), and active-low write enable timing control. Boot block lockout is activated by a specific 6-cycle command sequence targeting address 00000H–03FFFH, permanently disabling programming/erasure of that 16 KB region.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8 bits), organized as 512K words × 8-bit parallel interface |
| Supply Voltage | 3.0V–3.6V - enables direct connection to 3.3V logic rails without level shifting |
| Read Access Time | 90 ns max - determines minimum CPU wait-state requirement for zero-wait-state operation at ≤11 MHz |
| Chip Erase Time | 10 seconds typical - defines firmware update downtime during field reprogramming |
| Byte Programming Time | 30 µs typical - supports real-time patching of small code segments without system interruption |
| Endurance | 10,000 write/erase cycles - qualifies for embedded applications with infrequent firmware updates over 10+ year service life |
| Standby Current | 50 µA CMOS - enables low-power operation in battery-backed or energy-harvesting systems |
Pinout & Package
AT49LV040-90TI is available in 32-lead TSOP (8 × 14 mm, JEDEC MO-142 BA) and 32-lead PLCC (JEDEC MS-016 AE) packages. Both variants share identical pin functions and logic behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0 least significant bit |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read/write operations; high-impedance when deselected |
| CE | Chip Enable | Active-low global device select; must be low for any read/write access to occur |
| OE | Output Enable | Active-low output gate control; used with CE to manage bus contention during reads |
| WE | Write Enable | Active-low write strobe; latches address/data on falling edge for programming cycles |
| VCC | Power Supply | 3.0V–3.6V main supply; powers core logic and I/O buffers |
| GND | Ground Reference | Signal and power return path; decoupling capacitor required within 1 cm of VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.3V Supply Operation | Eliminates need for separate 5V or 12V programming voltage rails in embedded systems |
| Boot Block Lockout (16 KB) | Prevents accidental overwrite of critical bootloader code stored at 00000H–03FFFH |
| Data Polling & Toggle Bit | Enables polling-based firmware update routines without external timing components or interrupts |
| Hardware Data Protection | Prevents spurious writes due to power brownouts (<1.8V), noise spikes, or incorrect control timing |
| Industrial Temperature Range | Guarantees reliable operation from −40°C to +85°C for deployment in harsh environments |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage device providing boot-time instruction fetch and runtime parameter persistence. Use Value: 10,000-cycle endurance and −40°C to +85°C rating ensure 15+ years of field reliability without recalibration or replacement. |
Use Scenario: Holding certified bootloader code in Class II medical instruments where regulatory compliance requires immutable startup logic. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced write lockout protecting FDA-cleared initialization routines. Use Value: Boot block lockout prevents unauthorized modification of safety-critical startup sequences during service or firmware updates. |
| Telecom Base Station Configuration | Automotive ECU Calibration Data |
Use Scenario: Storing radio frequency calibration tables and network protocol stacks in outdoor telecom equipment exposed to thermal cycling and humidity. IC Role / Device Role / Timing Role: Field-upgradable configuration memory supporting remote OTA updates via serial interface controllers. Use Value: 90 ns read access enables real-time RF parameter lookup during signal processing without pipeline stalls. |
Use Scenario: Retaining engine calibration maps and diagnostic event logs in automotive electronic control units operating under under-hood thermal stress. IC Role / Device Role / Timing Role: Endurance-rated nonvolatile storage for mission-critical sensor compensation data updated during vehicle service. Use Value: 50 µA standby current minimizes battery drain during vehicle ignition-off periods while preserving calibration integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-90-4C-NHE | 4 Mbit, 3.0V–3.6V, 90 ns access, 100,000 endurance cycles, no boot block lockout | Lacks dedicated protected boot sector; requires external software management of critical code regions | Choose when higher endurance is prioritized over hardware-secured boot code protection |
| MX29LV400CBTI-90G | 4 Mbit, 3.0V–3.6V, 90 ns access, 100,000 cycles, top/bottom boot block configurable via hardware pins | Boot block location selectable at power-on; requires PCB-level strap configuration not present on AT49LV040-90TI | Choose when flexible boot sector placement (top vs bottom) is required for legacy BIOS compatibility |
Compared with SST39VF400A-90-4C-NHE and MX29LV400CBTI-90G, the AT49LV040-90TI provides fixed bottom-boot architecture with permanent lockout activation, lower standby current (50 µA vs ≥100 µA), and simpler command-set implementation-making it optimal for cost-sensitive industrial designs where boot security and power efficiency outweigh ultra-high endurance needs.
Availability
AT49LV040-90TI is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, and automotive electronics requiring stable component supply across extended product lifecycles.
Supply support for AT49LV040-90TI 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 devices.
The AT49LV040-90TI belongs to Atmel's Battery-Voltage™ Flash memory family, designed for embedded systems requiring single-supply in-system programmability, industrial temperature resilience, and hardware-protected boot code storage.
FAQ
What is the operating temperature range for the AT49LV040-90TI?
The AT49LV040-90TI is rated for industrial operation from −40°C to +85°C. This specification is guaranteed per the device's ordering code suffix "TI", which denotes industrial temperature grade. The 90 ns access time and all DC/AC electrical parameters remain valid across this full range, making the AT49LV040-90TI suitable for deployment in harsh environments such as factory floors, outdoor telecom cabinets, and under-hood automotive applications.
Does the AT49LV040-90TI require high-voltage programming signals?
No, the AT49LV040-90TI does not require high-voltage programming signals. It operates exclusively from a single 3.0V–3.6V supply for both read and write operations. Programming is controlled entirely through standard 3.3V-compatible command sequences issued to specific address/data locations - eliminating the need for external 12V generators or complex voltage translation circuitry in the AT49LV040-90TI system design.
How is boot block protection enabled on the AT49LV040-90TI?
Boot block protection on the AT49LV040-90TI is enabled via a six-cycle software command sequence: load 0xAA to address 0x5555, 0x55 to 0x2AAA, 0x80 to 0x5555, then repeat 0xAA/0x55, and finally load 0x40 to 0x5555. Once executed, the 16 KB boot block (00000H–03FFFH) becomes permanently write- and erase-locked. The AT49LV040-90TI provides software lockout detection by reading bit I/O0 at address 0x00002H in product ID mode.
What package options are available for the AT49LV040-90TI?
The AT49LV040-90TI is offered in two RoHS-compliant packages: 32-lead PLCC (32J) and 32-lead TSOP (32V, 8 × 14 mm). The "TI" suffix confirms industrial temperature rating for both variants. Pinout and functionality are identical between packages; only mechanical dimensions and mounting method differ. The TSOP variant is preferred for space-constrained PCB layouts, while PLCC supports socket-based prototyping and rework.
Can the AT49LV040-90TI be used as a direct replacement for the AT49BV040-90TI?
No, the AT49LV040-90TI is not a direct replacement for the AT49BV040-90TI due to differing voltage ranges: the AT49LV040-90TI operates from 3.0V–3.6V, whereas the AT49BV040-90TI supports 2.7V–3.6V. Systems powered at 2.7V–2.99V will fail to meet AT49LV040-90TI's minimum VCC requirement. While pinout, timing, and command set are compatible, voltage tolerance must be verified before substitution in existing AT49BV040-90TI designs.
AT49LV040-90TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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:
- 90 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49LV040-90TI FAQ
1.How can I place an order for AT49LV040-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV040-90TI 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 AT49LV040-90TI reliable?
The price and inventory of AT49LV040-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV040-90TI is usually 5 days.
3.What payment methods are accepted for AT49LV040-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV040-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV040-90TI?
AT49LV040-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV040-90TI 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 AT49LV040-90TI?
For technical support, including AT49LV040-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV040-90TI requirements.
6.How does Aetrix verify that AT49LV040-90TI is sourced from the original manufacturer or authorized distributors?
All AT49LV040-90TI 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 AT49LV040-90TI meets industry standards.
7.What is the process for return or replacement of AT49LV040-90TI?
All AT49LV040-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV040-90TI, 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 AT49LV040-90TI part is unused and in its original packaging.
Return procedure for AT49LV040-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV040-90TI Tags
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