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Microchip Technology AT49BV040-12TI
- Part No.:
- AT49BV040-12TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV040-12TI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,576
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Product details
Overview
AT49BV040-12TI 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, 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, commonly used in industrial embedded controllers for firmware storage and boot code retention.
For engineers reviewing the AT49BV040-12TI datasheet, AT49BV040-12TI pinout, AT49BV040-12TI application, or AT49BV040-12TI equivalent, key selection considerations include industrial temperature range (−40°C to +85°C), TSOP/PLCC package compatibility, boot-block protection behavior, and DC/AC timing compliance under 2.7V–3.6V VCC.
Technical Context
The AT49BV040-12TI implements a standard parallel 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 software-controlled operations including chip erase, byte programming, and boot block lockout via six-byte sequences written to specific address/data locations.
It supports dual-line control (CE/OE) for bus contention prevention and features hardware data protection via VCC sense (<1.8V inhibition), noise filtering (<15 ns pulse rejection), and input-level tolerance (0–5.5V on address/control pins). Data Polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide real-time program/erase cycle status detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8 bits), enabling full firmware image storage for mid-complexity microcontrollers. |
| Read Access Time | 120 ns max - defines minimum CPU wait-state requirement for zero-wait-state operation on 8 MHz bus. |
| VCC Operating Range | 2.7V to 3.6V - supports direct connection to battery-backed or low-voltage regulated rails without level shifting. |
| Chip Erase Time | 10 seconds typical - enables predictable field firmware update windows without external timing circuitry. |
| Byte Programming Time | 30 µs typical - allows rapid patch updates with minimal system interruption during runtime reprogramming. |
| Boot Block Size | 16 KB (00000H–03FFFH) - reserves dedicated secure region for bootloader code, isolated from main memory updates. |
| Endurance | 10,000 write/erase cycles - qualifies for long-life industrial logging or configuration storage applications. |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in battery-operated systems during sleep modes. |
Pinout & Package
AT49BV040-12TI is available in 32-lead TSOP (8 × 14 mm, package code 32V) and PLCC (32J) variants; this part uses the industrial-grade TSOP package rated for −40°C to +85°C operation.
| 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 interface compatible with 80C51, Z80, and x86-based controllers; high-impedance when deselected. |
| CE | Chip Enable | Active-low chip select; must be low for read/write; enables device decoding in multi-chip memory maps. |
| OE | Output Enable | Active-low output gate; controls data bus drive independently of CE to prevent bus contention. |
| WE | Write Enable | Active-low write strobe; latches address/data edges for command execution and byte programming. |
| VCC | Power Supply | 2.7V–3.6V primary supply; powers core logic and I/O buffers; includes VCC sense for program inhibition. |
| GND | Ground Reference | Signal and power return path; decoupling capacitor required within 1 cm of VCC pin per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Single 2.7V–3.6V Supply Operation | Eliminates need for separate 5V or 12V programming voltage rails, simplifying power design in portable or battery-powered systems. |
| Hardware Boot Block Lockout | Permanently protects 16 KB of lower-address memory (00000H–03FFFH) from accidental erasure or overwrite after activation. |
| Data Polling & Toggle Bit Detection | Enables polling-based firmware update routines without fixed delays; reduces host MCU overhead and improves reliability over timeout-based methods. |
| Internal Program Control Logic | Executes full byte-program and chip-erase algorithms autonomously using only standard WE/CE/OE timing - no external sequencer required. |
| Input Voltage Tolerance (0–5.5V) | Allows direct interfacing with 5V-tolerant microcontrollers without level shifters on address/control lines, reducing BOM count. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
Use Scenario: Storing and updating firmware images in programmable logic controllers deployed in factory automation environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile program memory holding application code and configuration tables; accessed via parallel bus during cold start and field upgrades. Use Value: Industrial temperature rating (−40°C to +85°C) and 10,000-cycle endurance ensure reliable operation across 10+ years of scheduled firmware revisions without memory degradation. | Use Scenario: Securing bootloader code in FDA-cleared diagnostic equipment where unauthorized modification must be physically prevented. IC Role / Device Role / Timing Role: Boot block–configured Flash storing immutable startup routines; main array holds updatable application logic and calibration data. Use Value: Hardware-enforced boot block lockout prevents corruption of certified bootloader code during routine application updates, satisfying IEC 62304 traceability requirements. |
| Automotive Body Control Module (BCM) | Point-of-Sale Terminal Configuration Memory |
Use Scenario: Holding vehicle-specific configuration parameters and CAN protocol stacks in body control modules subjected to automotive thermal cycling. IC Role / Device Role / Timing Role: Parallel-interface Flash memory mapped into microcontroller address space; read during power-on initialization and updated via diagnostic port. Use Value: 120 ns access time meets timing budgets for 8-bit/16-bit automotive MCUs; low 50 µA standby current minimizes battery drain during vehicle sleep mode. | Use Scenario: Storing localized language packs, tax tables, and merchant-specific settings in retail terminals requiring field-upgradable content without hardware replacement. IC Role / Device Role / Timing Role: Field-reprogrammable nonvolatile memory accessed via microcontroller GPIO-banged or parallel bus interface during maintenance mode. Use Value: In-system reprogrammability with standard 3V commands eliminates need for socketed EPROM programmers; 30 µs/byte programming enables sub-second configuration updates. |
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 access, 3.0V–3.6V supply, same 32-pin TSOP package but lacks hardware boot block lockout. | Requires software-managed sector protection; less suitable for safety-critical boot code isolation. | Choose when faster read speed is prioritized and boot security is handled externally. |
| MX29LV040CTTC-70G | 4 Mbit, 70 ns access, 3.0V–3.6V supply, supports CFI query mode but uses different command set and lacks toggle-bit detection. | CFI compatibility eases migration in standardized Flash drivers, but requires firmware adaptation for erase/lock commands. | Prefer for new designs needing CFI-based toolchain support and vendor interoperability. |
Compared with SST39VF040-70-4C-NHE and MX29LV040CTTC-70G, the AT49BV040-12TI trades raw speed for deterministic boot-block hardware protection and dual-status polling (Data Polling + Toggle Bit), making it uniquely suited for industrial and medical applications where firmware integrity outweighs marginal access-time gains.
Availability
AT49BV040-12TI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic devices, automotive body control modules, and point-of-sale terminals requiring stable component supply across extended product lifecycles.
Supply support for AT49BV040-12TI 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 fabless semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49BV/LV series was designed specifically for battery-voltage-compatible embedded systems requiring reliable, low-power, in-system reprogrammable nonvolatile storage with hardware-enforced boot code protection.
FAQ
What is the operating temperature range for the AT49BV040-12TI?
The AT49BV040-12TI is rated for industrial temperature operation from −40°C to +85°C, as confirmed by its ordering suffix "TI" and the AC/DC specifications table in the official Atmel datasheet Rev. 0679D–03/01. This range ensures reliable performance in harsh environments such as factory floors, automotive under-hood locations, and outdoor kiosks where ambient conditions exceed commercial limits. The AT49BV040-12TI maintains full timing compliance and data retention across this entire span.
Does the AT49BV040-12TI support hardware boot block protection?
Yes, the AT49BV040-12TI includes a dedicated 16 KB boot block (addresses 00000H–03FFFH) with hardware-enforced programming lockout. Once activated via the documented six-byte command sequence, the boot block becomes permanently immune to erase or program operations - even during full-chip erase. This feature is intrinsic to the AT49BV040-12TI silicon and does not rely on external logic or software emulation.
What package type is used by the AT49BV040-12TI?
The AT49BV040-12TI uses a 32-lead Plastic Thin Small Outline Package (TSOP) measuring 8 mm × 14 mm (package code 32V), as specified in the Atmel ordering information table. This surface-mount package is optimized for high-density PCB layouts and supports both reflow and wave soldering processes. Pin compatibility is maintained with the PLCC (32J) and larger TSOP (32T, 8×20 mm) variants of the same device family.
How does the AT49BV040-12TI indicate completion of a byte programming cycle?
The AT49BV040-12TI provides two independent hardware methods: Data Polling (complement of programmed data appears on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming and stops upon completion). Both mechanisms are implemented in silicon and require no external components. These features allow the host system to poll asynchronously rather than relying on fixed timing delays, improving update reliability in variable-clock systems.
Is the AT49BV040-12TI compatible with 5V microcontrollers?
Yes - the AT49BV040-12TI's address and control inputs (A0–A18, CE, OE, WE) tolerate 0–5.5V logic levels while operating from a 2.7V–3.6V VCC supply, per the "Input Levels" section of the datasheet. This allows direct connection to legacy 5V MCUs without level-shifting circuitry. However, I/O0–I/O7 pins are limited to 0–VCC+0.6V, so bidirectional data lines must be interfaced through open-drain or clamped buffers when connecting to 5V systems.
AT49BV040-12TI 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:
- 120 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49BV040-12TI FAQ
1.How can I place an order for AT49BV040-12TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV040-12TI 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 AT49BV040-12TI reliable?
The price and inventory of AT49BV040-12TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV040-12TI is usually 5 days.
3.What payment methods are accepted for AT49BV040-12TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV040-12TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV040-12TI?
AT49BV040-12TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV040-12TI 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 AT49BV040-12TI?
For technical support, including AT49BV040-12TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV040-12TI requirements.
6.How does Aetrix verify that AT49BV040-12TI is sourced from the original manufacturer or authorized distributors?
All AT49BV040-12TI 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 AT49BV040-12TI meets industry standards.
7.What is the process for return or replacement of AT49BV040-12TI?
All AT49BV040-12TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV040-12TI, 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 AT49BV040-12TI part is unused and in its original packaging.
Return procedure for AT49BV040-12TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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