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Microchip Technology AT49BV002T-90VI
- Part No.:
- AT49BV002T-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV002T-90VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV002T-90VI from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code/data storage in embedded microcontroller systems. It delivers 90 ns read access time, supports byte-by-byte programming (30 µs/byte typical), features hardware data protection and DATA polling, and is qualified for industrial temperature range (−40°C to +85°C). It is commonly deployed in firmware boot storage for industrial controllers and legacy communication modules.
For engineers reviewing the AT49BV002T-90VI datasheet, AT49BV002T-90VI pinout, AT49BV002T-90VI application, or AT49BV002T-90VI equivalent, key selection considerations include its 32-pin VSOP package, boot block lockout capability (address range 3C000H–3FFFFH), sector-erasable architecture (16K boot + two 8K parameter + two main blocks), and compatibility with standard 5V-command protocols despite 3V-only operation.
Technical Context
The AT49BV002T-90VI implements a command-register-based Flash architecture with software-controlled erase and program operations using six-cycle chip erase and sector erase sequences. Its memory map is partitioned into five distinct sectors: one 16K-byte boot block (3C000H–3FFFFH), two 8K-byte parameter blocks (3A000H–3BFFFH and 38000H–39FFFH), and two main memory blocks (20000H–37FFFH and 00000H–1FFFFH).
It uses standard EPROM-compatible control signals (CE/OE/WE) for read access and supports both DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) for cycle completion detection. The RESET pin enables system-level reset and - when driven to 12 V - overrides boot block lockout during erase/program cycles, a feature absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - sufficient for full bootloader + configuration data in space-constrained designs. |
| Read Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with single-cell Li-ion or regulated 3.3 V rails, eliminating need for dual-voltage support. |
| Program/Erase End Detection | DATA polling (I/O7) and Toggle Bit (I/O6) - enables deterministic firmware update sequencing without fixed delay loops. |
| Endurance | 10,000 write/erase cycles - suitable for field-upgradable firmware with infrequent updates over product lifetime. |
| Operating Temperature | −40°C to +85°C - certified for industrial environments including factory automation and outdoor telemetry units. |
| Standby Current | 50 µA CMOS - enables low-power sleep modes in battery-backed or energy-harvesting systems. |
Pinout & Package
AT49BV002T-90VI is supplied in a 32-lead Very Thin Small Outline Package (VSOP), 8 mm × 14 mm body, 0.5 mm pitch, with gull-wing leads. Pin 1 is marked by a beveled corner or dot; pin numbering follows standard counter-clockwise orientation from pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 select byte location, A17 selects upper/lower half of memory map. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read data output and program data input; 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; controls device activation on shared bus. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during multi-device reads; high = outputs tri-stated. |
| WE | Write Enable | Active-low control for write/erase command latching; falling edge latches address, rising edge latches data per command cycle. |
| RESET | Reset Input | Active-low system reset; drives outputs to high-Z; 12 V pulse enables boot block override - critical for secure firmware recovery. |
| VCC | Power Supply | 2.7–3.6 V primary supply; internal voltage regulation ensures stable core operation across rail variation. |
| GND | Ground Reference | Signal and power return; requires low-impedance connection to minimize noise coupling during fast transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte sector (3C000H–3FFFFH) permanently protected after command sequence; prevents accidental overwrite of bootloader while allowing runtime updates to application code. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes) - eliminates spurious writes in noisy industrial environments. |
| Sector-Erasable Architecture | Independent erasure of boot block, two 8K parameter blocks, and two main memory blocks - enables modular firmware updates without full chip erase. |
| 12 V RESET Override | Applying 12 V ± 0.5 V to RESET pin during erase/program bypasses boot block lockout - provides secure recovery path for corrupted boot code. |
| Standard Command Protocol | 5V-level command sequences (e.g., 5555H/AAH, 2AAAH/55H) executed over 3V supply - simplifies integration with legacy 5V microcontrollers via level-shifting or direct interface. |
Applications
| Industrial PLC Firmware Storage | Legacy Telecom Bootloader |
|---|---|
Use Scenario: Storing boot firmware and configuration parameters in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing deterministic 90 ns read access to initialize CPU and peripherals at power-on. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; 50 µA standby current extends uptime in battery-buffered backup scenarios. |
Use Scenario: Hosting boot code and protocol stacks in discontinued DSLAM line cards requiring long-term maintenance and field upgrades. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory enabling remote firmware patches without hardware replacement. Use Value: Sector erase allows selective update of parameter blocks without disturbing main application code; 12 V RESET override enables emergency bootloader recovery. |
| Medical Device Configuration Memory | Automotive Diagnostic Module Storage |
Use Scenario: Retaining calibration data, user preferences, and safety-critical configuration settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory with hardware write protection preventing unintended data corruption during power transients. Use Value: Hardware data protection (VCC sense, noise filter) guarantees write inhibition during brown-out; industrial temp rating ensures reliability in clinical environments. |
Use Scenario: Storing OBD-II protocol firmware and vehicle-specific adaptation data in aftermarket diagnostic tools subjected to automotive thermal cycling. IC Role / Device Role / Timing Role: Field-upgradable Flash memory interfacing directly with 8-bit microcontrollers via standard CE/OE/WE control. Use Value: 2.7–3.6 V operation matches automotive 3.3 V regulator outputs; 90 ns access supports real-time response to diagnostic request packets. |
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 | 2 Mbit, 3.0–3.6 V, 90 ns access, 32-pin TSOP; no 12 V RESET override; boot block at 00000H–03FFFH. | Lacks boot block lockout override; fixed boot sector location limits flexibility in memory-mapped systems requiring upper-address boot code. | Select when cost sensitivity outweighs need for secure recovery; verify address mapping compatibility with existing bootloader design. |
| MX29LV200CTTI-90G | 2 Mbit, 3.0–3.6 V, 90 ns access, 48-pin TSOP; C-suffix indicates common boot sector (top/bottom configurable); no 12 V RESET function. | Higher pin count increases PCB area; boot sector configuration requires hardware strap or register setting - less deterministic than AT49BV002T-90VI's command-based lockout. | Prefer for new designs needing top/bottom boot flexibility; avoid if migrating legacy AT49BV002T-90VI layout due to incompatible footprint. |
Compared with SST39VF200A-90-4C-NHE and MX29LV200CTTI-90G, the AT49BV002T-90VI uniquely combines industrial temperature rating, VSOP packaging, fixed upper-address boot block (3C000H–3FFFFH), and 12 V RESET override - making it optimal for secure, space-constrained, field-serviceable embedded systems where bootloader integrity is critical.
Availability
AT49BV002T-90VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy telecom bootloader deployment, and medical device configuration memory requiring stable component supply across extended product lifecycles.
Supply support for AT49BV002T-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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products, including datasheets, application notes, and long-term supply commitments.
The AT49BV002T-90VI belongs to Atmel's Battery-Voltage™ Flash memory family, designed specifically for reliable in-system reprogramming in battery-powered and industrial embedded systems requiring single-supply 3V operation and robust data retention.
FAQ
What is the boot block address range for AT49BV002T-90VI?
The boot block for AT49BV002T-90VI occupies addresses 3C000H to 3FFFFH (16 Kbytes), located at the top of the 256K-word memory map. This differs from non-T variants (e.g., AT49BV002N), which place the boot block at 00000H–03FFFH. The upper-address placement avoids conflict with standard reset vector locations in many 8-bit microcontrollers and simplifies memory-mapped boot execution.
Does AT49BV002T-90VI support 5V-tolerant inputs?
No, AT49BV002T-90VI does not support 5V-tolerant inputs. All control inputs (CE, OE, WE, RESET) and address/data lines are rated for −0.6 V to VCC + 0.6 V, with VCC max at 3.6 V. Applying 5 V risks permanent damage. However, its command protocol uses 5V-level logic thresholds (VIH = 2.0 V min) and accepts 5V command sequences - meaning external 5V microcontrollers can drive it directly only if their I/O pins are 3.3 V tolerant or level-shifted.
How is boot block lockout enabled and verified on AT49BV002T-90VI?
Boot block lockout on AT49BV002T-90VI is enabled via a six-cycle command sequence: 5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H. Verification is performed in Software Product Identification mode: reading address 3C002H returns I/O0 = high if lockout is active. Once enabled, programming/erasing the boot block requires 12 V applied to RESET - a hardware-gated security mechanism unique to T-suffix devices.
What package type is used for AT49BV002T-90VI?
AT49BV002T-90VI is packaged in a 32-lead Very Thin Small Outline Package (VSOP), designated as package code 32V, with dimensions 8 mm × 14 mm and 0.5 mm lead pitch. This surface-mount package offers lower profile and better thermal performance than PDIP or PLCC alternatives, making it suitable for compact industrial and telecom modules where board space is constrained.
Can AT49BV002T-90VI be erased sector-by-sector?
Yes, AT49BV002T-90VI supports individual sector erase for all five memory regions: the 16K boot block (3C000H–3FFFFH), two 8K parameter blocks (3A000H–3BFFFH and 38000H–39FFFH), and two main memory blocks (20000H–37FFFH and 00000H–1FFFFH). Each sector erase uses a six-bus-cycle command with sector-specific address (SA) and data 30H, enabling targeted updates without affecting unrelated firmware sections.
AT49BV002T-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
AT49BV002T-90VI FAQ
1.How can I place an order for AT49BV002T-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002T-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 AT49BV002T-90VI reliable?
The price and inventory of AT49BV002T-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002T-90VI is usually 5 days.
3.What payment methods are accepted for AT49BV002T-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002T-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002T-90VI?
AT49BV002T-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002T-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 AT49BV002T-90VI?
For technical support, including AT49BV002T-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002T-90VI requirements.
6.How does Aetrix verify that AT49BV002T-90VI is sourced from the original manufacturer or authorized distributors?
All AT49BV002T-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 AT49BV002T-90VI meets industry standards.
7.What is the process for return or replacement of AT49BV002T-90VI?
All AT49BV002T-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002T-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 AT49BV002T-90VI part is unused and in its original packaging.
Return procedure for AT49BV002T-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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