My Inquiry
My Account
Microchip Technology AT49BV002-90VI
- Part No.:
- AT49BV002-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002-90VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,184
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV002-90VI from Atmel is a 2-Mbit (256K × 8) single-supply Flash memory IC designed for in-system reprogrammability in industrial embedded systems. It operates from 2.7V to 3.6V, delivers 70 ns read access time, supports sector-based erase (boot, parameter, and main memory blocks), and guarantees ≥10,000 write/erase cycles - enabling firmware updates in microcontroller boot loaders and industrial HMI storage.
For engineers reviewing the AT49BV002-90VI datasheet, AT49BV002-90VI pinout, AT49BV002-90VI application, or AT49BV002-90VI equivalent, this page provides verified package mapping (32-pin VSOP), confirmed sector architecture (16K boot + dual 8K parameter + 96K/128K main), hardware data protection logic, DATA polling/Toggle Bit status detection, and industrial temperature support (–40°C to +85°C).
Technical Context
The AT49BV002-90VI implements a standard parallel Flash interface with CE/OE/WE control lines and 18-bit address bus (A0–A17), supporting EPROM-like read timing and command-based programming/erasure. Its internal state machine executes software-controlled sector or chip erase via six-cycle command sequences (e.g., 5555h/2AAAh/80h/5555h/2AAAh/40h for boot lockout enable).
It features dual-mode boot block protection: permanent lockout when enabled on BV variants, with override capability via 12V RESET input. The device uses CMOS standby current (50 µA) and active current (25 mA), with hardware VCC sense, noise filtering (<15 ns pulse rejection), and program inhibit logic (OE low / CE high / WE high) to prevent inadvertent writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for bootloader code and configuration data in resource-constrained controllers. |
| Read Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces without wait states in industrial MCU designs. |
| Supply Voltage | 2.7V to 3.6V - compatible with 3.3V systems and battery-backed operation down to 2.7V. |
| Erase Time | 10 seconds typical for full chip erase - enables predictable field firmware update windows. |
| Programming Speed | 30 µs/byte typical - allows rapid patching of small code segments without system downtime. |
| Endurance | ≥10,000 program/erase cycles - validated for long-term use in programmable logic controllers and telemetry devices. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor metering. |
Pinout & Package
AT49BV002-90VI is packaged in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm, with gull-wing leads and standard JEDEC footprint. Pin 1 is marked by notch or dot; pin 9 is NC (not connected) per datasheet Rev. 0982D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus decoding 256K locations; A0–A17 fully utilized for linear addressing across all sectors. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; supports byte-wide reads/writes and status polling on I/O6 (toggle bit) and I/O7 (data polling). |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output control; used with CE to gate data bus - enables shared bus arbitration without external logic. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle - critical for reliable command sequence execution. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12V override enables boot block reprogramming even when locked. |
| VCC | Power Supply | +2.7V to +3.6V supply; powers core logic and I/O buffers - requires local 0.1 µF decoupling per datasheet layout guidelines. |
| GND | Ground | Reference return path for VCC and I/O signals - must be low-impedance plane to maintain signal integrity during fast transitions. |
| DC | No Connect | Pin 9 is unconnected (NC); must be left floating or tied to GND per design - no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | One 16K-byte boot block (00000h–03FFFh), two 8K-byte parameter blocks, and two main memory blocks (96K/128K) - enables modular firmware updates without erasing critical boot code. |
| Hardware Data Protection | VCC sense (<1.8V inhibits programming), noise filter (<15 ns pulse rejection), and triple-input inhibit (OE low / CE high / WE high) - eliminates spurious writes in electrically noisy industrial settings. |
| Boot Block Lockout | Software-enabled permanent write protection for boot sector; lockout status detectable via software ID mode at address 00002h - ensures bootloader integrity across power cycles. |
| Status Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - allows host MCU to poll completion without fixed delays, reducing firmware overhead and improving update reliability. |
| 12V RESET Override | Applying 12V ±0.5V to RESET pin during erase/program bypasses boot lockout - provides recovery path for corrupted boot code in deployed systems. |
Applications
| Industrial PLC Firmware Storage | Embedded HMI Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile program storage with parallel interface; provides deterministic 90 ns read access for real-time scan cycles and sector-erase capability for field-upgradable logic modules. Use Value: Enables secure, in-system firmware updates without removing the controller from operation - reducing maintenance downtime and supporting remote diagnostics. | Use Scenario: Holding display configuration, language packs, and calibration data in human-machine interface panels used in medical equipment and building automation. IC Role / Device Role / Timing Role: Parameter block storage (dual 8K sections) with independent erase capability - allows updating UI assets without disturbing boot loader or application code. Use Value: Supports localized UI deployment and regulatory recalibration without full flash reprogramming - simplifying compliance validation and field service. |
| Microcontroller Boot Loader Memory | Telemetry Device Event Log |
Use Scenario: Hosting secure boot code and secure update handlers in ARM Cortex-M based edge nodes deployed in remote utility metering infrastructure. IC Role / Device Role / Timing Role: Boot block (16K) with hardware lockout and 12V override - ensures immutable first-stage boot while permitting authenticated firmware upgrades. Use Value: Meets IEC 62443 security requirements for protected boot paths and enables cryptographic signature verification before application load. | Use Scenario: Recording timestamped sensor events, fault logs, and diagnostic snapshots in environmental monitoring devices operating unattended for months. IC Role / Device Role / Timing Role: Main memory block (96K/128K) with 10,000-cycle endurance and 30 µs/byte programming - supports frequent small-write logging with wear leveling via host firmware. Use Value: Eliminates need for external EEPROM or FRAM; reduces BOM cost and PCB area while maintaining data retention over 20 years at 85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-90-4C-NHE | 4-Mbit density (512K × 8), 90 ns access, 3.0–3.6V supply, same 32-pin TSOP/VSOP footprint but different command set and sector map. | Larger capacity suits applications needing extended parameter storage; lacks 12V RESET override and boot lockout override capability. | Select when higher density is required and boot block recovery via 12V is not needed; verify command compatibility in existing firmware. |
| MX29LV200CTTI-90G | 2-Mbit (256K × 8), 90 ns, 3.0–3.6V, supports CFI query, identical sector architecture (16K boot + 2×8K param + 2×main), but no 12V RESET feature. | CFI-compliant interface simplifies driver porting; boot lockout is software-only with no hardware override - less resilient to corruption. | Prefer for new designs requiring standardized CFI drivers; avoid where field-recovery of locked boot sectors is mission-critical. |
Compared with SST39VF200A-90-4C-NHE and MX29LV200CTTI-90G, the AT49BV002-90VI uniquely combines industrial temperature rating, 12V RESET override for boot recovery, and Atmel's proven sector protection scheme - making it optimal for safety-critical or long-lifecycle embedded deployments where firmware resilience outweighs density or CFI convenience.
Availability
AT49BV002-90VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded HMI configuration memory, and microcontroller boot loader memory requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002-90VI 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, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49BV series was designed specifically for in-system reprogrammable Flash memory in resource-constrained embedded systems - emphasizing robustness, sector-level flexibility, and hardware-assisted data integrity for industrial firmware storage.
FAQ
What is the maximum operating temperature range for the AT49BV002-90VI?
The AT49BV002-90VI is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the "DC and AC Operating Range" table of the official datasheet (Rev. 0982D), where the "I" suffix denotes industrial grade. The device maintains full functionality-including 90 ns read access, 30 µs/byte programming, and sector erase-across this entire range.
Does the AT49BV002-90VI support hardware write protection for the boot sector?
Yes, the AT49BV002-90VI supports hardware-enforced boot sector protection via its boot block programming lockout feature. Once enabled using the documented six-cycle command sequence (5555h/2AAAh/80h/5555h/2AAAh/40h), the 16K boot block (00000h–03FFFh) becomes permanently write-protected at ≤5.5V. The AT49BV002-90VI also supports 12V RESET override for emergency reprogramming - a hardware-level recovery mechanism not found in most competing Flash devices.
What package type is used for the AT49BV002-90VI?
The AT49BV002-90VI uses a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm, with gull-wing leads. This is explicitly stated in the "AT49BV002 Ordering Information" table (page 14), where "AT49BV002-90VI" maps to package code "32V". Pin 9 is designated as "Don't Connect" (DC), and the package complies with JEDEC MO-187 standards.
How does the AT49BV002-90VI indicate completion of a byte programming cycle?
The AT49BV002-90VI provides two hardware-supported methods: DATA polling and Toggle Bit detection. During programming, reading the last written address returns the complement of the data on I/O7 (DATA polling); once complete, true data appears. Alternatively, I/O6 toggles between 0 and 1 during the operation and stops toggling upon completion. Both mechanisms are characterized in the datasheet (pages 12–13) and require no external timing components.
Is the AT49BV002-90VI pin-compatible with other members of the AT49BV/LV002 family?
Yes, the AT49BV002-90VI shares identical pinout and electrical interface with all AT49BV/LV002(N)(T) variants in the same package (e.g., AT49BV002-90JC, AT49LV002-90VI). All 32-pin versions - PLCC (32J), PDIP (32P6), TSOP (32T), and VSOP (32V) - maintain consistent pin functions (A0–A17, I/O0–I/O7, CE/OE/WE/RESET/VCC/GND/DC), enabling direct substitution within the same package footprint and voltage range.
AT49BV002-90VI 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:
- 2Mbit
- Memory Organization:
- 256K 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
AT49BV002-90VI FAQ
1.How can I place an order for AT49BV002-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002-90VI 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 AT49BV002-90VI reliable?
The price and inventory of AT49BV002-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002-90VI is usually 5 days.
3.What payment methods are accepted for AT49BV002-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002-90VI?
AT49BV002-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002-90VI 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 AT49BV002-90VI?
For technical support, including AT49BV002-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002-90VI requirements.
6.How does Aetrix verify that AT49BV002-90VI is sourced from the original manufacturer or authorized distributors?
All AT49BV002-90VI 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 AT49BV002-90VI meets industry standards.
7.What is the process for return or replacement of AT49BV002-90VI?
All AT49BV002-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002-90VI, 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 AT49BV002-90VI part is unused and in its original packaging.
Return procedure for AT49BV002-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV002-90VI 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…
