My Inquiry
My Account
Microchip Technology AT49BV040-90JI
- Part No.:
- AT49BV040-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV040-90JI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,560
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV040-90JI 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 AT49BV040-90JI datasheet, AT49BV040-90JI pinout, AT49BV040-90JI application, or AT49BV040-90JI equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), PLCC-32 package compatibility, boot block lockout functionality, and hardware data protection with VCC sense and noise filtering.
Technical Context
The AT49BV040-90JI implements a byte-programmable NOR Flash architecture with internal command register control, supporting software-controlled chip erase via six-byte command sequences. It uses standard EPROM-like read timing with dual-line CE/OE control for bus contention avoidance.
Its boot block protection operates at address range 00000H–03FFFH (16 KB), enabled by a specific six-cycle command sequence; once activated, the sector becomes permanently write-locked. Data Polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide real-time program/erase cycle status without external polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8 bits), organized as 512K words × 8-bit parallel interface |
| Supply Voltage | 2.7V–3.6V - enables direct battery operation without voltage translation in portable or backup-power systems |
| Read Access Time | 90 ns - determines maximum sustained read throughput in microcontroller boot fetch cycles |
| Chip Erase Time | 10 seconds - defines minimum firmware update latency when full reprogramming is required |
| Byte Programming Time | 30 µs typical - sets worst-case per-byte write latency during field firmware patching |
| Endurance | 10,000 program/erase cycles - specifies usable lifetime for applications requiring frequent configuration updates |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in always-on industrial monitoring nodes |
Pinout & Package
AT49BV040-90JI is packaged in a 32-lead Plastic J-leaded Chip Carrier (PLCC-32), 1.14 mm lead thickness, 18.5 mm × 18.3 mm body size, with pin 1 index mark and JEDEC MS-016 AE compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0–A18 map directly to physical memory locations |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for read/write operations; high-impedance when CE or OE is inactive |
| 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 gate; controls data bus drive; high-Z state prevents bus contention during multi-device sharing |
| WE | Write Enable | Active-low write strobe; latches address/data on falling edge (WE or CE, whichever occurs last) |
| VCC | Power Supply | 2.7V–3.6V primary supply; internal VCC sense disables programming if below 1.8V typical |
| GND | Ground Reference | Signal and power return; decoupling capacitor placement critical for stable 90 ns read timing |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB (00000H–03FFFH) permanently protected after enable command - secures bootloader integrity against accidental overwrite |
| Data Polling | I/O7 returns complement of programmed byte during write - eliminates need for fixed delay timers in host firmware |
| Toggle Bit Detection | I/O6 toggles during active program/erase - provides asynchronous status indication without dedicated status pins |
| Hardware Data Protection | VCC sense, CE/OE/WE logic inhibit, and 15 ns noise filter - prevents spurious writes during power transients or EMI events |
| Input Voltage Tolerance | Address/control inputs accept 0–5.5V while powered at 2.7V–3.6V - simplifies level-shifting in mixed-voltage system designs |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup code and runtime configuration; accessed during cold boot and firmware update cycles. Use Value: Industrial temperature rating (−40°C to +85°C) and 10,000-cycle endurance ensure reliable operation over 10+ years in unattended deployments. | Use Scenario: Securing boot code for diagnostic imaging equipment where regulatory compliance requires immutable bootloader verification at power-on. IC Role / Device Role / Timing Role: Bottom-boot Flash providing authenticated startup sequence; boot block lockout prevents tampering with secure boot vector. Use Value: Hardware-enforced 16 KB boot block protection eliminates need for external authentication circuitry or cryptographic key management overhead. |
| Telecom Remote Node Configuration | Automotive Body Control Module (BCM) Calibration Storage |
Use Scenario: Holding field-upgradable configuration tables and protocol stacks in outdoor telecom repeaters exposed to voltage sags and ESD events. IC Role / Device Role / Timing Role: Field-programmable nonvolatile memory supporting remote firmware patches via serial interface with local buffering. Use Value: 2.7V minimum VCC operation and hardware noise filtering allow safe reprogramming during brownout conditions without external supervisors. | Use Scenario: Storing vehicle-specific calibration data (e.g., window lift profiles, mirror positioning) that must persist across battery disconnects in automotive BCMs. IC Role / Device Role / Timing Role: Low-power retention memory retaining user-customized settings; accessed only during initialization or service mode. Use Value: 50 µA CMOS standby current minimizes parasitic drain on 12V battery during long-term parking, extending maintenance-free operation. |
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, 3.0V–3.6V, 90 ns access, TSOP-48 package, no boot block lockout | Lacks hardware-enforced boot sector protection; requires external software management for bootloader security | Choose when board layout supports larger TSOP-48 footprint and bootloader integrity is managed in software |
| MX29LV400CBTI-90G | 4 Mbit, 3.0V–3.6V, 90 ns access, TSOP-48, top/bottom boot configurable | Supports both top and bottom boot configurations; different command set and timing margins | Prefer when migrating legacy designs using MXIC's command protocol or requiring flexible boot sector location |
Compared with SST39VF400A-90-4C-NHE and MX29LV400CBTI-90G, the AT49BV040-90JI offers unique hardware-enforced bottom-boot lockout in a compact PLCC-32 package, enabling simpler, more robust bootloader protection without firmware complexity or PCB redesign.
Availability
AT49BV040-90JI is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and telecom infrastructure requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT49BV040-90JI 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 embedded applications.
The AT49BV/LV040 series was designed specifically for battery-powered and industrial systems requiring single-supply Flash with hardware-based data integrity features and extended temperature reliability.
FAQ
What is the operating temperature range for the AT49BV040-90JI?
The AT49BV040-90JI is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the Ordering Information table on page 11 of the official Atmel datasheet (Rev. 0679D–03/01), where the "I" suffix denotes industrial grade. The device maintains full DC and AC performance across this range, including 90 ns read access time and 50 µA standby current.
Does the AT49BV040-90JI support hardware boot block protection?
Yes, the AT49BV040-90JI includes a hardware-enforced boot block lockout feature covering addresses 00000H–03FFFH (16 KB). Once enabled via the documented six-cycle command sequence, the sector becomes permanently write- and erase-protected. This behavior is explicitly defined in the "BOOT BLOCK PROGRAMMING LOCKOUT" section (page 2) and verified in the Command Definition table (page 4) of the datasheet.
What package type does the AT49BV040-90JI use?
The AT49BV040-90JI uses a 32-lead Plastic J-leaded Chip Carrier (PLCC-32) package, identified as "32J" in the Ordering Information table (page 11). Mechanical dimensions, pin 1 indexing, and JEDEC MS-016 AE compliance are fully detailed in the Packaging Information section (page 12), confirming its 18.5 mm × 18.3 mm body size and 1.14 mm lead thickness.
How is end-of-program detection implemented in the AT49BV040-90JI?
The AT49BV040-90JI supports two hardware-assisted end-of-program detection methods: Data Polling (I/O7 returns complement of loaded byte until completion) and Toggle Bit (I/O6 toggles during active programming). Both are described in detail on pages 3 and 9 of the datasheet, with timing specifications provided in the Data Polling and Toggle Bit Characteristics tables.
What is the maximum number of program/erase cycles guaranteed for the AT49BV040-90JI?
The AT49BV040-90JI guarantees a minimum of 10,000 program/erase cycles, as stated in the "Features" section (page 1) and confirmed in the "Device Operation" description (page 2). This endurance rating applies across the full industrial temperature range and is measured under standard 30 µs/byte programming and 10-second chip erase conditions.
AT49BV040-90JI 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:
- 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-PLCC (13.97x11.43)
AT49BV040-90JI FAQ
1.How can I place an order for AT49BV040-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV040-90JI 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 AT49BV040-90JI reliable?
The price and inventory of AT49BV040-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV040-90JI is usually 5 days.
3.What payment methods are accepted for AT49BV040-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV040-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV040-90JI?
AT49BV040-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV040-90JI 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 AT49BV040-90JI?
For technical support, including AT49BV040-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV040-90JI requirements.
6.How does Aetrix verify that AT49BV040-90JI is sourced from the original manufacturer or authorized distributors?
All AT49BV040-90JI 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 AT49BV040-90JI meets industry standards.
7.What is the process for return or replacement of AT49BV040-90JI?
All AT49BV040-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV040-90JI, 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 AT49BV040-90JI part is unused and in its original packaging.
Return procedure for AT49BV040-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV040-90JI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
