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Microchip Technology AT49BV001T-90VI
- Part No.:
- AT49BV001T-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV001T-90VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,292
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Product details
Overview
AT49BV001T-90VI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory with 90 ns read access time, sector-based architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), and hardware data protection. It supports byte-by-byte programming (30 µs/byte typical), chip/sector erase (10 s max), and operates across –40°C to +85°C for industrial embedded firmware storage.
For engineers reviewing the AT49BV001T-90VI datasheet, AT49BV001T-90VI pinout, AT49BV001T-90VI application, or AT49BV001T-90VI equivalent, key selection considerations include boot block lockout behavior (1C000H–1FFFFH address range), RESET-pin-based override capability (12 V required), and compatibility with standard CE/OE/WE microprocessor bus timing.
Technical Context
The AT49BV001T-90VI implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its sector map places the 16 KB boot block at 1C000H–1FFFFH - distinct from non-T variants - and supports DATA polling (I/O7 complement) and toggle-bit detection (I/O6) for program/erase completion.
Hardware protection includes VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low, CE high, or WE high blocks writes). The RESET pin enables both system reset and boot block reprogramming override when driven to 12 V ± 0.5 V - a feature absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Read Access Time | 90 ns maximum - determines minimum CPU wait-state insertion for 8-bit parallel bus interfacing |
| Supply Voltage | 2.7 V to 3.6 V - enables direct connection to 3.3 V logic rails without level shifting |
| Boot Block Address Range | 1C000H–1FFFFH (16 KB) - fixed location for secure bootloader code storage |
| Byte Programming Time | 30 µs typical - defines worst-case firmware update latency per byte during field reprogramming |
| Erase Cycle Time | 10 seconds maximum for full chip - constrains total firmware update duration in production or field service |
| Endurance | 10,000 program/erase cycles - specifies usable lifetime for frequently updated configuration or logging sectors |
Pinout & Package
AT49BV001T-90VI is available in 32-lead VSOP (8 × 14 mm) package, compliant with industrial temperature range (–40°C to +85°C) and rated for 90 ns access time.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing (A0–A16) |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus compatible with standard microprocessor data bus protocols |
| 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 control; used with CE to prevent bus contention during shared-memory operation |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing |
| RESET | Reset & Override Control | Logic-high = normal operation; 12 V pulse enables boot block reprogramming even when lockout is active |
| VCC | Power Supply | 2.7–3.6 V supply input; internal regulation supports stable core voltage across rail variation |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal circuitry |
| NC | No Connect | Pin 31 (VSOP) is unconnected - must remain floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | Enables permanent write protection of 16 KB boot code region (1C000H–1FFFFH); prevents accidental corruption during field updates |
| 12 V RESET Override | Allows reprogramming of locked boot block via 12 V pulse on RESET pin - critical for recovery after failed firmware load |
| DATA Polling & Toggle Bit | Dual asynchronous status reporting (I/O7 complement / I/O6 toggle) eliminates need for fixed delay timers in host firmware |
| Sector-Erasable Architecture | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) enables modular firmware partitioning |
| Hardware Write Inhibit | VCC sense, noise filtering, and control-line gating prevent spurious writes during power transients or EMI events |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code, runtime firmware, and calibration data; accessed via 8-bit parallel bus with 90 ns timing compliance. Use Value: Sector architecture allows independent update of application firmware without erasing bootloader, while industrial temperature rating ensures reliability across ambient extremes. | Use Scenario: Securing certified bootloader code in FDA-regulated diagnostic equipment requiring immutable startup routines. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection on 16 KB boot block (1C000H–1FFFFH) to prevent unauthorized modification. Use Value: RESET-pin override enables controlled recovery of corrupted boot code during service - satisfying regulatory traceability and fail-safe requirements. |
| Telecom Base Station Configuration | Automotive Infotainment Update Cache |
Use Scenario: Holding field-upgradable configuration tables and protocol stacks in cellular base station remote units. IC Role / Device Role / Timing Role: Parameter block storage (two 8 KB sectors) for network-specific settings; erased/reprogrammed independently of main firmware. Use Value: Fast 30 µs/byte programming and 10 s chip erase support rapid remote configuration deployment without full system reboot. | Use Scenario: Caching over-the-air (OTA) firmware patches prior to validated installation in vehicle infotainment head units. IC Role / Device Role / Timing Role: High-endurance (10,000-cycle) temporary storage for patch binaries; main memory blocks used for staged write/verify operations. Use Value: Hardware data protection prevents corruption during vehicle ignition transients, ensuring OTA integrity in automotive 12 V electrical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001T-90JI | Same die, PDIP package (32P6), 90 ns access, industrial temp - no VSOP footprint | Through-hole assembly only; incompatible with surface-mount PCB layouts requiring 8×14 mm VSOP | Select when legacy through-hole manufacturing or prototyping with breadboard-friendly DIP is required |
| SST39VF010-90-4C-NHE | 1 Mbit, 90 ns, 3.0–3.6 V; lacks RESET-based boot override and uses different command set | Boot block protection is software-only; no 12 V recovery path - increases risk of unrecoverable boot corruption | Choose only if board design already uses SST39VF010 pinout and firmware avoids reliance on hardware override |
Compared with AT49BV001T-90JI and SST39VF010-90-4C-NHE, the AT49BV001T-90VI uniquely combines VSOP packaging, industrial temperature rating, and hardware-enabled boot block recovery - making it optimal for space-constrained, field-serviceable embedded systems.
Availability
AT49BV001T-90VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader, telecom configuration, and automotive infotainment update cache requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV001T-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/LV series was designed specifically for in-system reprogrammable firmware and configuration storage in resource-constrained industrial and automotive applications, emphasizing robustness, sector granularity, and hardware-level data integrity.
FAQ
What is the boot block address range for AT49BV001T-90VI?
The AT49BV001T-90VI has its 16 KB boot block located at address range 1C000H to 1FFFFH - distinct from non-T variants (which use 00000H–03FFFH). This fixed mapping ensures consistent bootloader placement across designs using the T-suffix family, and is verified in the device's sector erase command table and boot lockout detection address (1C002H).
Does AT49BV001T-90VI support 12 V override of boot block lockout?
Yes, AT49BV001T-90VI supports 12 V ± 0.5 V applied to the RESET pin during chip/sector erase or byte programming to temporarily disable boot block lockout. This feature is explicitly documented in the Boot Block Programming Lockout Override section and is unavailable on N-suffix variants like AT49BV001N(T).
What package type is used by AT49BV001T-90VI?
AT49BV001T-90VI uses a 32-lead Plastic Thin Small Outline Package (VSOP) measuring 8 mm × 14 mm. This is confirmed in the Ordering Information table (page 18), where "AT49BV001T-90VI" maps to package code "32V", defined as "32-lead, Plastic Thin Small Outline Package (VSOP) (8 x 14 mm)".
How does AT49BV001T-90VI indicate end-of-program status?
AT49BV001T-90VI provides two hardware methods: DATA polling (I/O7 returns complement of loaded data until completion, then true data) and toggle-bit detection (I/O6 toggles between 0/1 during operation, stops when complete). Both are specified in AC timing tables and require no external clock or timer - enabling deterministic host firmware flow control.
What is the maximum erase time for AT49BV001T-90VI?
The maximum erase cycle time for AT49BV001T-90VI is 10 seconds for full chip erase, as stated in the Features list and Program Cycle Characteristics table. Sector erase times are not individually specified but fall within this bound; the device internally manages timing without external clocks, ensuring predictable worst-case update windows.
AT49BV001T-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:
- 1Mbit
- Memory Organization:
- 128K 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
AT49BV001T-90VI FAQ
1.How can I place an order for AT49BV001T-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001T-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 AT49BV001T-90VI reliable?
The price and inventory of AT49BV001T-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001T-90VI is usually 5 days.
3.What payment methods are accepted for AT49BV001T-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001T-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001T-90VI?
AT49BV001T-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001T-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 AT49BV001T-90VI?
For technical support, including AT49BV001T-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001T-90VI requirements.
6.How does Aetrix verify that AT49BV001T-90VI is sourced from the original manufacturer or authorized distributors?
All AT49BV001T-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 AT49BV001T-90VI meets industry standards.
7.What is the process for return or replacement of AT49BV001T-90VI?
All AT49BV001T-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001T-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 AT49BV001T-90VI part is unused and in its original packaging.
Return procedure for AT49BV001T-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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