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Microchip Technology AT49BV040-12JC
- Part No.:
- AT49BV040-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV040-12JC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,517
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Product details
Overview
AT49BV040-12JC from Atmel is a 4-megabit (512K × 8) single-voltage Flash memory IC operating at 2.7V–3.6V, featuring 120 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 AT49BV040-12JC datasheet, AT49BV040-12JC pinout, AT49BV040-12JC application, or AT49BV040-12JC equivalent, key selection criteria include boot-sector protection capability, 2.7V minimum VCC operation, PLCC-32 package compatibility, and software-controlled chip erase via six-byte command sequence.
Technical Context
The AT49BV040-12JC 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 of WE or CE (whichever occurs first). Its internal command register enables byte-programming and chip-erase operations using only 2.7V–3.6V supply voltage-no external high-voltage generator required.
It supports dual detection methods for program/erase completion: Data Polling (I/O7 complement toggling) and Toggle Bit (I/O6 state alternation), both usable at any point during the cycle. The boot block (00000H–03FFFH) is permanently protected after lockout activation via a six-command sequence, ensuring secure firmware startup code integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8), enabling full firmware image storage for 8-bit microcontrollers |
| Read Access Time | 120 ns max - defines maximum clock-to-data latency in wait-state-free bus interfaces |
| Supply Voltage Range | 2.7V to 3.6V - allows direct connection to 3.3V logic rails and battery-backed operation |
| Boot Block Size | 16 KB (00000H–03FFFH) - reserves lowest-address region for secure bootloader code |
| Byte Programming Time | 30 µs typical - determines minimum time between successive byte writes during firmware updates |
| Chip Erase Time | 10 seconds max - sets worst-case downtime during full memory reinitialization |
| Endurance | 10,000 write/erase cycles - specifies guaranteed field lifetime under frequent firmware update regimes |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in battery-operated systems |
Pinout & Package
AT49BV040-12JC is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), measuring 1.14 mm lead thickness with 0.635 mm chamfer, compliant with JEDEC MS-016 AE outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 524,288-word addressing; A0 least significant bit |
| CE | Chip Enable | Active-low global device select; must be low for read/write; inhibits programming when high |
| OE | Output Enable | Active-low output gate control; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low write strobe; latches address/data edges and initiates internal programming logic |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; outputs valid data during read, accepts input during programming |
| VCC | Power Supply | 2.7V–3.6V primary supply; powers all internal logic and charge pumps |
| GND | Ground Reference | Signal and power return path; decoupling capacitor placement critical for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Single 2.7V–3.6V Operation | Eliminates need for separate 5V or 12V programming supplies - simplifies power architecture |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulses rejected), and control-line inhibition prevent accidental writes |
| Boot Block Lockout | Software-activated permanent write protection for 16 KB startup region - prevents bootloader corruption |
| Data Polling & Toggle Bit | Dual asynchronous status reporting methods - avoids fixed timing delays and improves system responsiveness |
| Software Product Identification | Manufacturer (1FH) and device (13H) codes readable via command sequence - enables automated BOM verification |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware for programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile program memory holding ladder logic interpreter and I/O configuration tables; accessed during cold start and firmware update. Use Value: 10,000-cycle endurance ensures reliable field updates over 10+ years; -40°C to +85°C industrial grade operation maintains data integrity across thermal cycling. | Use Scenario: Securing boot code for FDA-cleared diagnostic instruments requiring validated firmware startup sequences. IC Role / Device Role / Timing Role: Boot block-protected Flash storing certified bootloader that validates application image checksum before execution. Use Value: Hardware-enforced boot sector lockout prevents unauthorized modification of safety-critical startup routines - meets IEC 62304 traceability requirements. |
| Automotive Infotainment Head Unit | Network Router Configuration Storage |
Use Scenario: Holding firmware and UI assets in automotive-grade infotainment systems subject to ISO 16750-2 electrical transients. IC Role / Device Role / Timing Role: Primary Flash memory mapped into MCU address space for XIP (execute-in-place) operation during runtime. Use Value: 2.7V minimum VCC tolerance accommodates brown-out conditions during vehicle cranking; 120 ns access enables real-time UI rendering without wait states. | Use Scenario: Storing configuration profiles, MAC address tables, and failover scripts in enterprise-grade network switches. IC Role / Device Role / Timing Role: Persistent configuration store updated via SNMP or CLI commands; retains settings across power cycles and firmware upgrades. Use Value: 50 µA standby current minimizes energy drain during idle periods; software chip erase enables rapid factory reset without hardware intervention. |
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 access, 3.0V–3.6V supply, same PLCC-32 footprint but no boot block lockout feature | Lacks hardware-enforced boot sector protection - requires external software safeguards for bootloader integrity | Choose when faster read speed is prioritized over secure boot functionality |
| MX29LV400CTTI-12G | 4 Mbit, 120 ns access, 2.7V–3.6V supply, top-boot configuration (boot block at highest addresses), different command set | Top-boot layout conflicts with AT49BV040-12JC's bottom-boot address mapping (00000H–03FFFH) | Choose only if board layout supports remapped boot vector and firmware can be relocated |
Compared with SST39VF400A-70-4C-NHE and MX29LV400CTTI-12G, the AT49BV040-12JC uniquely provides bottom-boot lockout with verified 2.7V operation and identical command protocol to legacy Atmel devices - enabling drop-in replacement in existing designs without firmware or PCB changes.
Availability
AT49BV040-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive infotainment head units requiring stable component supply across extended product lifecycles.
Supply support for AT49BV040-12JC 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, designed high-reliability nonvolatile memory and microcontroller solutions for industrial, automotive, and communications markets.
The AT49BV/LV series was engineered specifically for embedded systems needing single-supply Flash with robust boot protection and in-system reprogrammability - targeting applications where firmware security and voltage flexibility are critical.
FAQ
What is the guaranteed minimum supply voltage for reliable operation of the AT49BV040-12JC?
The AT49BV040-12JC is specified for guaranteed operation down to 2.7V across the commercial and industrial temperature ranges. Below this threshold, hardware data protection activates - inhibiting programming and preventing unintended writes due to brown-out conditions. This 2.7V minimum enables direct integration with Li-ion battery-powered systems and 3.3V regulator outputs with tight tolerances. The AT49BV040-12JC maintains full read functionality and data retention at this voltage level.
How does the boot block lockout feature work on the AT49BV040-12JC?
The AT49BV040-12JC boot block lockout is activated by executing a precise six-command sequence (AAh, 55h, 80h, AAh, 55h, 40h) to specific address locations. Once enabled, the 16 KB region (00000H–03FFFH) becomes permanently write- and erase-protected - no further programming or erasure is possible. The AT49BV040-12JC provides software detection via Product ID mode: reading address 00002H returns I/O0 = high if lockout is active. This feature is irreversible and ensures bootloader integrity.
Can the AT49BV040-12JC be used in place of the AT49BV040-90JC without hardware changes?
Yes - the AT49BV040-12JC shares identical pinout, package (PLCC-32), command set, voltage range, and boot block functionality with the AT49BV040-90JC. The only difference is the read access time specification: 120 ns vs. 90 ns. Systems designed for the slower 120 ns timing will operate correctly with the 90 ns variant, but not vice versa. The AT49BV040-12JC is fully backward-compatible in timing-critical applications where the host controller accommodates the longer access window.
What detection methods does the AT49BV040-12JC provide to confirm programming completion?
The AT49BV040-12JC offers two independent, hardware-supported methods: Data Polling (monitoring I/O7 for complemented data during programming) and Toggle Bit (observing I/O6 state alternation). Both methods allow polling at any time during the cycle and eliminate reliance on fixed timing delays. The AT49BV040-12JC guarantees these features function across its full 2.7V–3.6V supply range and temperature specifications, enabling deterministic firmware update sequencing in real-time systems.
Is the AT49BV040-12JC compatible with standard EPROM programmers?
No - the AT49BV040-12JC requires a Flash-specific programmer supporting its 2.7V–3.6V single-supply operation and Atmel command protocol (e.g., six-byte chip erase, four-byte byte program). Standard 5V/12V EPROM programmers cannot execute the required command sequences or meet voltage-level compatibility for I/O signaling. The AT49BV040-12JC must be programmed using tools qualified for Atmel's Battery-Voltage™ Flash family, such as Data I/O PS-48 or Xeltek SuperPro series with appropriate adapter and firmware.
AT49BV040-12JC 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:
- 120 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV040-12JC FAQ
1.How can I place an order for AT49BV040-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV040-12JC 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 AT49BV040-12JC reliable?
The price and inventory of AT49BV040-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV040-12JC is usually 5 days.
3.What payment methods are accepted for AT49BV040-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV040-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV040-12JC?
AT49BV040-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV040-12JC 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 AT49BV040-12JC?
For technical support, including AT49BV040-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV040-12JC requirements.
6.How does Aetrix verify that AT49BV040-12JC is sourced from the original manufacturer or authorized distributors?
All AT49BV040-12JC 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 AT49BV040-12JC meets industry standards.
7.What is the process for return or replacement of AT49BV040-12JC?
All AT49BV040-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV040-12JC, 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 AT49BV040-12JC part is unused and in its original packaging.
Return procedure for AT49BV040-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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