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Microchip Technology AT49BV040A-70JI
- Part No.:
- AT49BV040A-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV040A-70JI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,308
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Product details
Overview
AT49BV040A-70JI from Microchip Technology (formerly Atmel) is a 4 Mbit (512K × 8) single-supply, in-system reprogrammable Flash memory IC operating at 2.7–3.6 V, with 70 ns read access time, 30 µs/byte programming, and sector-erasable architecture including a 16 KB boot block with programmable lockout. It is used for firmware storage and code execution in embedded controllers and industrial microprocessor systems.
For engineers reviewing the AT49BV040A-70JI datasheet, AT49BV040A-70JI pinout, AT49BV040A-70JI application, or AT49BV040A-70JI equivalent, key selection considerations include its 32-lead PLCC package, industrial temperature range (−40°C to +85°C), hardware data protection features, DATA polling/toggle bit status detection, and boot-block write-protection capability.
Technical Context
The AT49BV040A-70JI implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read timing and software command-based erase/program operations. Its internal architecture includes one 16 KB boot block, two 8 KB parameter blocks, and eight main memory blocks (one 32 KB + seven 64 KB), all individually erasable via six-cycle command sequences.
It uses CMOS-compatible input thresholds (VIL = 0.6 V, VIH = 2.0 V), supports hardware data protection via VCC sense (<1.8 V inhibits programming), noise filtering on WE/CE, and program inhibit via OE low/CE high/WE high states. Erase and program cycles are internally timed - chip erase completes in ≤12 seconds, sector erase in ≤7 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8) - provides sufficient space for bootloader, configuration tables, and firmware images in resource-constrained microcontroller systems. |
| Read Access Time | 70 ns - enables direct code execution (XIP) from Flash in systems with ≤14 MHz bus clocks without wait states. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small data segments or patching without full chip reprogramming. |
| Erase Cycle Time | ≤7 seconds per sector - supports fast reconfiguration of parameter blocks during system initialization or calibration routines. |
| Supply Voltage Range | 2.7 V to 3.6 V - compatible with single-cell Li-ion, 3.3 V logic rails, and battery-backed industrial power domains. |
| Operating Temperature | −40°C to +85°C - qualified for use in industrial automation, motor drives, and outdoor embedded equipment. |
| Endurance | 10,000 program/erase cycles - ensures long-term reliability in applications requiring periodic firmware or calibration updates. |
| Standby Current | 50 µA CMOS - minimizes quiescent power in always-on or low-power sleep modes of host systems. |
Pinout & Package
AT49BV040A-70JI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC), JEDEC MS-016 variation AE compliant, with 1.27 mm pitch, 12.45 mm × 12.45 mm body, and pin 1 identifier marked by a corner notch. The package is lead-free (Pb/Halide-free) and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A11 is don't-care in command cycles. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; I/O7 used for DATA polling, I/O6 for toggle-bit status monitoring. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention and enable high-impedance tri-state outputs. |
| WE | Write Enable | Active-low write strobe; latches address/data during command entry and byte programming cycles. |
| VCC | Power Supply | 2.7–3.6 V core supply; internal voltage regulation enables single-supply operation without external charge pumps. |
| GND | Ground | Reference return path for all digital and programming currents; decoupling required within 10 mm of VCC pin. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB (00000H–03FFFH) permanently protected via 6-cycle command sequence - secures bootloader integrity against accidental overwrite. |
| DATA Polling & Toggle Bit | I/O7 complement feedback and I/O6 toggling provide real-time, non-intrusive program/erase completion detection - eliminates need for fixed delay timers in host firmware. |
| Sector-Erasable Architecture | 11 independently erasable sectors (1 boot + 2 parameter + 8 main) - enables granular updates without disrupting operational code or configuration data. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and multi-signal inhibit (OE low / CE high / WE high) prevent spurious writes - critical for robustness in electrically noisy industrial environments. |
| Green Packaging | Pb/Halide-free PLCC package - meets RoHS Directive 2011/65/EU and facilitates compliance in global industrial and automotive supply chains. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory-floor automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile code storage with XIP-capable 70 ns read timing; boot block holds certified safety firmware locked against field modification. Use Value: Ensures deterministic boot behavior and regulatory compliance (IEC 61508 SIL2) via hardware-enforced write protection of critical startup code. | Use Scenario: Retaining calibrated sensor offsets, user preferences, and device serial history in portable diagnostic instruments with battery backup. IC Role / Device Role / Timing Role: Parameter block storage (two 8 KB sections) updated during calibration routines; sector erase isolates changes from active runtime code. Use Value: Enables field recalibration without firmware reflash, reducing service downtime and avoiding risk of corrupting operational firmware. |
| Automotive Body Control Module (BCM) | Telecom Remote Terminal Bootloader |
Use Scenario: Holding vehicle-specific configuration (lighting profiles, door lock logic) in BCMs exposed to wide thermal cycling and EMI. IC Role / Device Role / Timing Role: Industrial-grade Flash (−40°C to +85°C) with hardware VCC sense and noise filtering - prevents unintended writes during load-dump transients. Use Value: Guarantees data retention over 10+ years and withstands automotive electrical stress per ISO 7637-2, eliminating EEPROM wear-out concerns. | Use Scenario: Storing secure bootloader code that validates signed firmware images before execution in DSLAM remote terminals. IC Role / Device Role / Timing Role: Boot block (16 KB) programmed once at manufacturing and permanently locked; main memory stores updatable application firmware. Use Value: Provides root-of-trust foundation: immutable bootloader enforces cryptographic signature verification, preventing unauthorized firmware execution. |
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, 3.0–3.6 V supply; identical PLCC-32 package and pinout; lacks boot block lockout feature. | No hardware-enforced boot sector protection - requires software-managed write disable or external logic for bootloader security. | Select when boot block locking is unnecessary and cost sensitivity outweighs security requirements. |
| MX29LV040CTTI-70G | 4 Mbit, 70 ns, 3.0–3.6 V; TSOP-32 package (not PLCC); includes CFI-compliant command set but no dedicated boot block lockout. | Different footprint requires PCB redesign; CFI support simplifies driver portability but lacks hardware-level boot protection. | Choose for new designs prioritizing industry-standard CFI compatibility and smaller board area over legacy PLCC compatibility. |
Compared with SST39VF040-70-4C-NHE and MX29LV040CTTI-70G, the AT49BV040A-70JI uniquely delivers hardware-enforced boot block lockout in a drop-in PLCC-32 package, making it optimal for legacy industrial systems requiring certified bootloader integrity without layout changes.
Availability
AT49BV040A-70JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for AT49BV040A-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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products. The company specializes in microcontrollers, analog, Flash memory, and security ICs for industrial, automotive, and consumer markets.
The AT49BV040A-70JI belongs to Atmel's legacy parallel Flash memory product line, designed specifically for in-system reprogrammability in microprocessor-based systems requiring reliable, low-voltage, sector-erasable nonvolatile storage.
FAQ
What is the maximum chip erase time for the AT49BV040A-70JI?
The AT49BV040A-70JI has a maximum chip erase cycle time of 12 seconds, as specified in the AC characteristics table. This applies when the boot block lockout is disabled; if enabled, only parameter and main memory blocks are erased, but the total time remains bounded by the same 12-second limit. The device performs internal timing, requiring no external clock or polling during the erase operation.
Does the AT49BV040A-70JI support true 2.7 V operation across all functions?
Yes, the AT49BV040A-70JI operates fully at 2.7 V for read, program, and erase functions - no higher voltage is required. Its VCC sense circuitry disables programming if VCC drops below ~1.8 V, ensuring robustness during brown-out conditions. All DC and AC specifications, including 70 ns access time and 30 µs byte programming, are guaranteed over the full 2.7–3.6 V range.
How is boot block lockout verified after activation on the AT49BV040A-70JI?
After enabling boot block lockout via the 6-cycle command sequence, verification is performed in Software Product Identification mode: reading address 00002H returns the lockout status on I/O0 - a high level indicates lockout is active and the boot block (00000H–03FFFH) is permanently write-protected. The AT49BV040A-70JI will ignore all subsequent erase or program commands targeting this region.
Can the AT49BV040A-70JI be used in place of an EPROM in existing designs?
Yes, the AT49BV040A-70JI is pin- and function-compatible with standard 512K × 8 EPROMs (e.g., 27C4001) in PLCC-32 packages, sharing identical CE/OE/WE control and read timing. However, unlike EPROMs, it requires no UV erasure or external 12 V programming voltage - all operations execute under 3.3 V with software commands, enabling in-system updates without socket removal.
What packaging options are available for the AT49BV040A-70JI?
The AT49BV040A-70JI is supplied exclusively in a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated "32J" in Atmel's ordering matrix. It is Pb/Halide-free (RoHS-compliant) and rated for industrial temperature operation (−40°C to +85°C). Alternative packages like TSOP (32T) or VSOP (32V) exist for other variants (e.g., AT49BV040A-70TI), but not for the -70JI suffix.
AT49BV040A-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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49BV040A-70JI FAQ
1.How can I place an order for AT49BV040A-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV040A-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 AT49BV040A-70JI reliable?
The price and inventory of AT49BV040A-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV040A-70JI is usually 5 days.
3.What payment methods are accepted for AT49BV040A-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV040A-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV040A-70JI?
AT49BV040A-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV040A-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 AT49BV040A-70JI?
For technical support, including AT49BV040A-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV040A-70JI requirements.
6.How does Aetrix verify that AT49BV040A-70JI is sourced from the original manufacturer or authorized distributors?
All AT49BV040A-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 AT49BV040A-70JI meets industry standards.
7.What is the process for return or replacement of AT49BV040A-70JI?
All AT49BV040A-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV040A-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 AT49BV040A-70JI part is unused and in its original packaging.
Return procedure for AT49BV040A-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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