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Microchip Technology AT49BV040-90VC
- Part No.:
- AT49BV040-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV040-90VC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,641
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Product details
Overview
AT49BV040-90VC from Atmel is a 4-megabit (512K × 8) single-voltage Flash memory IC operating at 2.7V–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 reprogrammability without high-voltage inputs - used in embedded controllers for firmware storage and BIOS retention.
For engineers reviewing the AT49BV040-90VC datasheet, AT49BV040-90VC pinout, AT49BV040-90VC application, or AT49BV040-90VC equivalent, key selection criteria include boot-sector protection integrity, 2.7V minimum VCC compatibility, TSOP-32 (8×14 mm) footprint constraints, and Data Polling/Toggle Bit program-verification support.
Technical Context
The AT49BV040-90VC implements a CMOS-based NOR Flash architecture with internal command register control, enabling byte-programming and full-chip erase via six-byte software sequences. Its dual-line chip enable (CE) and output enable (OE) logic allows flexible bus contention management during read cycles.
Hardware data protection includes VCC sense (<1.8V inhibit), noise filtering on WE/CE (<15 ns pulse rejection), and active-level control gating. Boot block lockout is activated by a deterministic six-command sequence targeting address 5555h/2AAAh, permanently protecting 00000h–03FFFh once enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8), organized as single-plane NOR array |
| Read Access Time | 90 ns max - defines minimum CPU wait-state requirement for zero-wait-state interface |
| Supply Voltage Range | 2.7V to 3.6V - enables direct connection to 3.3V logic rails without level shifting |
| Byte Programming Time | 30 µs typical - determines firmware update latency per byte in field-programmable systems |
| Chip Erase Time | 10 seconds max - sets worst-case firmware recovery window after corruption |
| Endurance | 10,000 write/erase cycles - specifies field lifetime for infrequently updated configuration storage |
| Standby Current | 50 µA CMOS - enables battery-backed operation in low-power embedded hosts |
Pinout & Package
AT49BV040-90VC uses a 32-lead Plastic Thin Small Outline Package (TSOP) measuring 8 mm × 14 mm (JEDEC MO-142 BA, package code 32V), compatible with automated SMT assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0 LSB, A18 MSB |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; tri-stated when CE or OE high; supports byte-wide reads/writes |
| CE | Chip Enable | Active-low device select; must be low for valid read/write; enables hardware data protection when high |
| OE | Output Enable | Active-low output gate; controls data bus drive; toggling enables Toggle Bit verification |
| WE | Write Enable | Active-low write strobe; latches address/data edges for programming; inhibits writes when high |
| VCC | Power Supply | 2.7V–3.6V core supply; powers all logic and memory array; VCC sense disables programming below 1.8V |
| GND | Ground Reference | Signal and power return path; decoupling required within 10 mm of VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector protection | 16 KB (00000h–03FFFh) lockout prevents accidental overwrite of bootloader code |
| Data Polling & Toggle Bit | Dual real-time program/erase completion detection - eliminates need for fixed timing delays |
| Single 2.7V–3.6V supply | Eliminates external voltage translators; simplifies power design for 3.3V systems |
| Hardware data protection | VCC sense, noise filtering, and control-line gating prevent spurious writes during power transients |
| Software product identification | Manufacturer code (1Fh) and device code (13h) readable via standard address/data bus - enables auto-detection in host firmware |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory with guaranteed 10,000-cycle endurance and 85°C industrial temperature rating. Use Value: Enables field firmware updates without high-voltage programmers; boot block lockout preserves critical startup routines during remote upgrades. | Use Scenario: Retaining device-specific calibration parameters and safety-critical boot code in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power configuration storage with hardware write protection and 50 µA standby current. Use Value: Ensures regulatory-compliant data integrity; boot sector lockout meets IEC 62304 requirements for immutable bootloader storage. |
| Automotive Infotainment Boot ROM | Network Router Boot Image Storage |
Use Scenario: Hosting boot code and recovery firmware in head-unit systems requiring AEC-Q100-compliant components. IC Role / Device Role / Timing Role: Bottom-boot Flash memory with 90 ns read access supporting fast cold-boot sequences. Use Value: Meets automotive startup timing budgets; 2.7V min VCC ensures operation during cranking voltage dips. | Use Scenario: Storing primary and fallback boot images in enterprise-grade routers with remote firmware rollback capability. IC Role / Device Role / Timing Role: Dual-image storage medium with independent sector erasure and verification feedback. Use Value: Data Polling and Toggle Bit allow deterministic flash update status reporting to network management software. |
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, 90 ns, 3.0V–3.6V supply; no boot block lockout; requires 12V for product ID entry | Lacks hardware-protected boot sector; unsuitable where bootloader immutability is mandatory | Select only if boot protection is unnecessary and 12V programming infrastructure exists |
| MX29LV400CTTI-90G | 4 Mbit, 90 ns, 3.0V–3.6V; top-boot configuration (boot block at 7C000h–7FFFFh); different command set | Boot block location incompatible with AT49BV040-90VC's bottom-boot address map (00000h–03FFFh) | Requires PCB layout and firmware changes; not drop-in for existing bottom-boot designs |
Compared with SST39VF400A-90-4C-NHE and MX29LV400CTTI-90G, the AT49BV040-90VC uniquely delivers bottom-boot lockout with 2.7V operation and dual verification methods - critical for systems requiring guaranteed bootloader integrity under brown-out conditions.
Availability
AT49BV040-90VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive infotainment boot ROM requiring stable component supply across extended lifecycle demands.
Supply support for AT49BV040-90VC 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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication devices.
The AT49BV/LV series was designed for embedded systems requiring reliable, low-voltage Flash memory with integrated boot protection and in-system programmability - targeting industrial control, medical, and automotive applications.
FAQ
What is the operating voltage range for the AT49BV040-90VC?
The AT49BV040-90VC operates from 2.7V to 3.6V. This single-supply range eliminates the need for separate programming voltages and allows direct interfacing with 3.3V logic families. Operation below 2.7V is not guaranteed, and hardware data protection disables programming if VCC drops below 1.8V.
Does the AT49BV040-90VC support hardware write protection for its boot sector?
Yes, the AT49BV040-90VC includes a user-enabled boot block lockout feature that permanently protects the 16 KB region at addresses 00000h–03FFFh. Once activated via a six-command sequence, the boot sector cannot be erased or programmed - ensuring bootloader integrity in mission-critical systems.
How is program completion verified on the AT49BV040-90VC?
The AT49BV040-90VC provides two independent verification methods: Data Polling (complement of last written byte appears on I/O7 until completion) and Toggle Bit (I/O6 toggles during programming/erasure). Both allow real-time status monitoring without fixed timing delays, improving firmware update reliability.
What package type does the AT49BV040-90VC use?
The AT49BV040-90VC uses a 32-lead Plastic Thin Small Outline Package (TSOP) measuring 8 mm × 14 mm (JEDEC MO-142 BA, package code 32V). This surface-mount package supports automated assembly and is optimized for compact PCB layouts in space-constrained embedded systems.
Can the AT49BV040-90VC be used in industrial temperature applications?
Yes, the AT49BV040-90VC is rated for industrial temperature operation from –40°C to +85°C when ordered with the 'I' suffix (e.g., AT49BV040-90VI). The 'VC' suffix denotes the 32V TSOP package but does not specify temperature grade - confirm ordering code suffix ('C' = commercial, 'I' = industrial) for thermal compliance.
AT49BV040-90VC 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:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49BV040-90VC FAQ
1.How can I place an order for AT49BV040-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV040-90VC 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 AT49BV040-90VC reliable?
The price and inventory of AT49BV040-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV040-90VC is usually 5 days.
3.What payment methods are accepted for AT49BV040-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV040-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV040-90VC?
AT49BV040-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV040-90VC 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 AT49BV040-90VC?
For technical support, including AT49BV040-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV040-90VC requirements.
6.How does Aetrix verify that AT49BV040-90VC is sourced from the original manufacturer or authorized distributors?
All AT49BV040-90VC 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 AT49BV040-90VC meets industry standards.
7.What is the process for return or replacement of AT49BV040-90VC?
All AT49BV040-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV040-90VC, 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 AT49BV040-90VC part is unused and in its original packaging.
Return procedure for AT49BV040-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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