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Microchip Technology AT49BV040-90VI
- Part No.:
- AT49BV040-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV040-90VI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,717
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Product details
Overview
AT49BV040-90VI 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 - used for firmware storage and boot code retention in industrial embedded controllers.
For engineers reviewing the AT49BV040-90VI datasheet, AT49BV040-90VI pinout, AT49BV040-90VI application, or AT49BV040-90VI equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), VSOP/TSOP-32 package compatibility, boot block lockout functionality, and hardware data protection with VCC sense and noise filtering.
Technical Context
The AT49BV040-90VI 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). It supports software-controlled byte programming and full-chip erase via six-byte command sequences issued to specific address/data locations.
Its operation includes dual-mode product identification (hardware and software), Data Polling (I/O7 complement detection), and Toggle Bit (I/O6 toggling) for end-of-operation detection. The device integrates hardware data protection with VCC sense (<1.8V inhibition), OE/CE/WE logic-level program inhibit, and 15 ns input noise filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8), organized as 512K words × 8 bits |
| Supply Voltage | 2.7V–3.6V - enables direct battery operation without voltage translation |
| Read Access Time | 90 ns max - determines minimum bus cycle timing for CPU interface |
| Byte Programming Time | 30 µs typical - defines firmware update latency per byte |
| Chip Erase Time | 10 seconds max - sets worst-case field firmware reflash duration |
| Endurance | 10,000 program/erase cycles - specifies field-reprogrammability lifetime |
| Standby Current | 50 µA CMOS - enables low-power retention in always-on systems |
| Boot Block Size | 16 KB (00000H–03FFFH) - isolates secure bootloader from main firmware updates |
Pinout & Package
AT49BV040-90VI is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP), 8 × 14 mm footprint (JEDEC MO-142 BA, package code 32V), compatible with automated SMT assembly and space-constrained industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read/write data transfer |
| CE | Chip Enable | Active-low chip select; disables outputs and reduces current when high |
| OE | Output Enable | Active-low control for output buffer; enables read data drive |
| WE | Write Enable | Active-low signal initiating byte programming or command loading |
| VCC | Power Supply | 2.7V–3.6V primary supply; powers core logic and I/O buffers |
| GND | Ground Reference | Common return path for all internal circuits and I/O signals |
Key Features
| Feature | Design Value |
|---|---|
| Single 2.7V–3.6V Operation | Eliminates need for separate 5V or 12V programming supplies - simplifies power design |
| 16 KB Boot Block with Lockout | Hardware-enforced write protection for bootloader region (00000H–03FFFH) |
| Data Polling & Toggle Bit | Dual asynchronous methods (I/O7 complement / I/O6 toggle) to detect program/erase completion |
| Hardware Data Protection | VCC sense, OE/CE/WE logic inhibit, and 15 ns noise filtering prevent spurious writes |
| Industrial Temperature Range | −40°C to +85°C operation - qualified for factory automation and outdoor equipment |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code and runtime firmware; accessed via parallel bus during cold start and field updates. Use Value: 10,000-cycle endurance and −40°C to +85°C rating ensure reliable reprogramming over 10+ years of industrial service life. |
Use Scenario: Securing bootloader code in portable diagnostic instruments requiring FDA-compliant firmware integrity. IC Role / Device Role / Timing Role: Boot block-protected Flash storing immutable startup routines; main array holds updatable application firmware. Use Value: 16 KB lockout prevents accidental or malicious corruption of certified boot code while enabling safe field updates to application layers. |
| Telecom Remote Node Configuration | Automotive Body Control Module (BCM) |
Use Scenario: Holding configuration profiles and calibration tables in cellular base station remote radio units exposed to outdoor thermal cycling. IC Role / Device Role / Timing Role: Parallel-interface Flash memory mapped into microcontroller address space for fast read access during initialization. Use Value: 90 ns access time meets real-time boot timing budgets; 50 µA standby current minimizes battery drain during sleep mode. |
Use Scenario: Storing vehicle-specific calibration data and feature enablement flags in body control modules subject to automotive qualification. IC Role / Device Role / Timing Role: Nonvolatile storage for EEPROM-like parameter retention using byte-programmable Flash with lockout capability. Use Value: Hardware data protection (VCC sense, noise filtering) prevents unintended writes during load dump or ignition transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF040-90-4C-NHE | 4 Mbit, 3.0V–3.6V, 90 ns access, same TSOP-32 package but no boot block lockout | Lacks hardware-enforced boot sector protection; requires external software management of critical code regions | Select when boot block security is not required and lower cost is prioritized |
| MX29LV040CTTI-90G | 4 Mbit, 3.0V–3.6V, 90 ns access, includes 16 KB bottom-boot block but uses different command set (no toggle bit) | Supports boot block protection but lacks Toggle Bit end-of-erase detection - relies solely on polling | Select when Atmel command compatibility is not mandatory and alternate polling-only flow is acceptable |
Compared with SST39VF040-90-4C-NHE and MX29LV040CTTI-90G, the AT49BV040-90VI uniquely combines industrial temperature rating, hardware boot block lockout, and dual end-of-operation detection (Data Polling + Toggle Bit), making it optimal for safety-critical firmware storage where both reliability and verification certainty are required.
Availability
AT49BV040-90VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader retention, and telecom remote node configuration requiring stable component supply across extended lifecycle programs.
Supply support for AT49BV040-90VI 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 ICs for embedded systems.
The AT49BV/LV040 series was designed as a drop-in upgrade path from EPROM-based designs, delivering battery-voltage Flash memory with industrial-grade reliability and in-system reprogrammability.
FAQ
What is the operating temperature range for the AT49BV040-90VI?
The AT49BV040-90VI is rated for industrial temperature operation from −40°C to +85°C, as confirmed by its ordering code suffix "I" and the DC/AC operating range table in the official Atmel datasheet Rev. 0679D–03/01. This makes the AT49BV040-90VI suitable for deployment in harsh environments such as factory floors, outdoor telecom nodes, and automotive under-hood applications where extended thermal stability is required.
Does the AT49BV040-90VI support hardware boot block protection?
Yes, the AT49BV040-90VI includes a user-enabled 16 KB boot block (address range 00000H–03FFFH) with hardware lockout. Once activated via the six-byte command sequence (5555h/AAh → 2AAAh/55h → 5555h/40h), the boot block becomes permanently write- and erase-protected. This feature is explicitly documented in the "BOOT BLOCK PROGRAMMING LOCKOUT" section and verified in the Command Definition table of the AT49BV040-90VI datasheet.
What package type does the AT49BV040-90VI use?
The AT49BV040-90VI uses a 32-lead Plastic Thin Small Outline Package (TSOP) with 8 × 14 mm dimensions (JEDEC MO-142 BA, package code 32V). This is confirmed in the "Ordering Information" table and "Packaging Information" section of the datasheet, distinguishing it from the 32J (PLCC) and 32T (8 × 20 mm TSOP) variants. The compact 8 × 14 mm footprint supports high-density PCB layouts.
How does the AT49BV040-90VI indicate completion of a byte programming cycle?
The AT49BV040-90VI provides two independent hardware methods: Data Polling (reading the programmed byte returns its complement on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming and stops upon completion). Both mechanisms are fully specified in the "Data Polling Waveforms" and "Toggle Bit Waveforms" sections of the datasheet, enabling robust, clock-independent status monitoring.
Is the AT49BV040-90VI compatible with 5V-tolerant microcontrollers?
Yes - the AT49BV040-90VI accepts address and control inputs (A0–A18, CE, OE, WE) at 0–5.5V levels while powered from 2.7V–3.6V, as stated in the "INPUT LEVELS" section. However, I/O lines are limited to 0–(VCC + 0.6V); thus, direct 5V I/O interfacing requires level translation. This tolerance simplifies integration with legacy 5V logic systems without redesigning the address/control bus.
AT49BV040-90VI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49BV040-90VI FAQ
1.How can I place an order for AT49BV040-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV040-90VI 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 AT49BV040-90VI reliable?
The price and inventory of AT49BV040-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV040-90VI is usually 5 days.
3.What payment methods are accepted for AT49BV040-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV040-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV040-90VI?
AT49BV040-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV040-90VI 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 AT49BV040-90VI?
For technical support, including AT49BV040-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV040-90VI requirements.
6.How does Aetrix verify that AT49BV040-90VI is sourced from the original manufacturer or authorized distributors?
All AT49BV040-90VI 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 AT49BV040-90VI meets industry standards.
7.What is the process for return or replacement of AT49BV040-90VI?
All AT49BV040-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV040-90VI, 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 AT49BV040-90VI part is unused and in its original packaging.
Return procedure for AT49BV040-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV040-90VI Tags
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