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Microchip Technology AT49BV001AN-55VI
- Part No.:
- AT49BV001AN-55VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV001AN-55VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,593
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Product details
Overview
AT49BV001AN-55VI from Atmel is a 1 Mbit (128K × 8) single-supply Flash memory IC designed for in-system reprogrammability in embedded boot code storage. It operates from 2.7V to 3.6V, delivers 55 ns read access time, supports byte-by-byte programming (30 µs/byte typical), and features hardware data protection with 10,000 write cycles endurance. It is used in industrial microcontroller boot loaders requiring reliable nonvolatile code retention.
For engineers reviewing the AT49BV001AN-55VI datasheet, AT49BV001AN-55VI pinout, AT49BV001AN-55VI application, or AT49BV001AN-55VI equivalent, this page provides verified technical context, sector architecture details, boot block lockout behavior, PLCC-32 package mapping, and real-world design implications for secure firmware storage and field-upgradable systems.
Technical Context
The AT49BV001AN-55VI implements a sector-erasable Flash architecture with one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). Its command-set-driven operation uses standard CE/OE/WE control lines and requires no high-voltage programming inputs - all functions execute via 5V-compatible software command sequences.
It supports DATA polling (I/O7 complement) and Toggle Bit (I/O6) methods for program/erase cycle completion detection. The RESET pin is NC on this variant, eliminating reset-triggered boot block override capability present in other family members like the AT49BV001AT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits), organized as 128K words × 8 bits |
| Read Access Time | 55 ns - enables direct replacement of EPROMs in legacy 8-bit bus systems without timing redesign |
| Supply Voltage | 2.7 V to 3.6 V - compatible with battery-backed or low-voltage industrial power rails |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small firmware patches without system downtime |
| Erase Cycle Time | 3 seconds max for full chip erase - supports fast reconfiguration during manufacturing or service |
| Endurance | 10,000 program/erase cycles - sufficient for infrequent boot code updates over product lifetime |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
AT49BV001AN-55VI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package (JEDEC MS-016, Variation AE), with pin 1 marked by corner chamfer. Pin 1 is NC (No Connect) per datasheet specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A11 is don't-care in command cycles |
| 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 reads |
| WE | Write Enable | Active-low write strobe; latches address/data during command and programming cycles |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read data output and program data input; supports DATA polling on I/O7 |
| RESET | No Connect (NC) | Pin 1 on PLCC package is unconnected - boot block override via 12V on RESET is not available |
| VCC / GND | Power Supply | Single 2.7–3.6V supply; CMOS standby current ≤ 50 µA minimizes quiescent power draw |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte sector (00000H–03FFFH) permanently protected after enable - prevents accidental corruption of boot loader code |
| Sector Erase Flexibility | Independent erasure of two 8K-byte parameter blocks and two main memory blocks - enables selective firmware updates without full chip erase |
| Hardware Data Protection | VCC sense (<1.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibit logic - eliminates spurious writes in noisy environments |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling - eliminates need for fixed delay timers in host firmware |
| Standard Microprocessor Interface | CE/OE/WE timing compliant with common 8-bit MPU buses - drop-in replacement for EPROMs without glue logic changes |
Applications
| Industrial PLC Boot Memory | Medical Device Firmware Storage |
|---|---|
Use Scenario: Storing immutable boot loader and configuration parameters in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile boot code storage with hardware write protection; executes on power-up before main MCU firmware loads. Use Value: Prevents unauthorized or accidental modification of startup routines; 55 ns access ensures deterministic boot timing within tight real-time constraints. |
Use Scenario: Holding certified firmware images and calibration data in portable diagnostic equipment requiring regulatory traceability and field update capability. IC Role / Device Role / Timing Role: Secure, sector-protected Flash memory for FDA-compliant firmware storage with audit-ready write-cycle logging. Use Value: Sector erase enables safe patch deployment without risking boot integrity; 10,000-cycle endurance supports multi-year device lifecycle with periodic updates. |
| Telecom Base Station Control | Automotive ECU Calibration Storage |
Use Scenario: Retaining baseband processor initialization code and RF calibration tables in outdoor telecom infrastructure operating across extended temperature ranges. IC Role / Device Role / Timing Role: Industrial-temperature Flash memory interfacing directly to ARM9-based control processors via 8-bit parallel bus. Use Value: -40°C to +85°C rating ensures reliability in uncontrolled enclosures; 2.7–3.6V operation matches telecom DC-DC converter outputs. |
Use Scenario: Storing engine control unit calibration maps and safety-critical boot routines in automotive subsystems where firmware integrity is mandated by ISO 26262 ASIL-B requirements. IC Role / Device Role / Timing Role: Write-protected boot sector memory co-located with MCU on same PCB; accessed during cold start sequence. Use Value: Boot block lockout guarantees boot code immutability post-certification; hardware protection prevents EMI-induced corruption during vehicle cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-55-4C-NHE | 512 Kbit density (64K × 8), 55 ns access, same PLCC-32 package and 3V supply | Lacks boot block lockout and sector erase; only supports full-chip erase | Select when lower density suffices and simplified erase control is preferred over security features |
| MX29LV010TC-55G | 1 Mbit density, 55 ns access, TSOP-32 package, 3.0–3.6V supply, includes CFI query support | Supports Common Flash Interface but lacks dedicated boot block lockout command sequence | Choose for standardized CFI-based flash management in new designs where vendor-agnostic tooling is required |
Compared with SST39VF010-55-4C-NHE and MX29LV010TC-55G, the AT49BV001AN-55VI uniquely combines 1 Mbit capacity, hardware-enforced boot block protection, and flexible sector erase in a PLCC-32 industrial package - making it optimal for legacy-replacement and safety-critical boot memory roles where write-integrity assurance is mandatory.
Availability
AT49BV001AN-55VI is available at Aetrix Electronics and suitable for industrial PLC boot memory, medical device firmware storage, telecom base station control, automotive ECU calibration storage, and embedded system recovery image retention requiring stable component supply across long production lifecycles.
Supply support for AT49BV001AN-55VI 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 devices for industrial and embedded markets.
The AT49BV001AN-55VI belongs to Atmel's Battery-Voltage™ Flash memory product line, engineered for reliable in-system reprogramming in resource-constrained, low-power, and safety-aware embedded systems.
FAQ
What is the function of the RESET pin on the AT49BV001AN-55VI?
The RESET pin on the AT49BV001AN-55VI is designated as No Connect (NC) per the official datasheet. Unlike the AT49BV001AT variant, this pin is unconnected internally and serves no functional purpose. It cannot be used for reset assertion or boot block override. The AT49BV001AN-55VI relies solely on CE/OE/WE control sequencing for all operations, and its boot block lockout feature - once enabled - cannot be overridden via voltage injection on RESET because the pin is physically inactive.
Does the AT49BV001AN-55VI support sector erase, and what are the sector boundaries?
Yes, the AT49BV001AN-55VI supports independent sector erase. Its memory is divided into: one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks (04000H–05FFFH and 06000H–07FFFH), and two main memory blocks (08000H–0FFFFH = 32K bytes; 10000H–1FFFFH = 64K bytes). Each sector can be erased individually using the six-cycle sector erase command with appropriate address and data values. This enables targeted firmware updates without disturbing boot or calibration data stored elsewhere.
How does the boot block programming lockout work on the AT49BV001AN-55VI?
The AT49BV001AN-55VI implements a permanent boot block lockout feature that, once enabled via a six-cycle command sequence (555H/AAH → AAH/55H → 555H/80H → 555H/AAH → AAH/55H → 555H/40H), prevents any further programming or erasure of the 16K-byte boot sector (00000H–03FFFH). Unlike variants with RESET-based override, this lockout is irreversible on the AT49BV001AN-55VI due to the NC RESET pin. The lockout state can be verified by reading bit I/O0 at address 00002H in software product identification mode.
What package type is used for the AT49BV001AN-55VI, and are there footprint alternatives?
The AT49BV001AN-55VI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package (JEDEC MS-016, Variation AE), identified as package code "32J". Pin 1 is marked by a corner chamfer and is NC. While the same die is offered in TSOP-32 (32T) and VSOP-32 (32V) packages under different order codes (e.g., AT49BV001AN-55TI), the AT49BV001AN-55VI specifically denotes the PLCC variant - no footprint compatibility exists between PLCC and surface-mount TSOP/VSOP packages due to differing land patterns, lead pitch, and mounting requirements.
Can the AT49BV001AN-55VI be used as a direct replacement for standard EPROMs like the 27C010?
Yes, the AT49BV001AN-55VI is designed as a functional and pin-compatible replacement for 1 Mbit EPROMs such as the 27C010 in 8-bit parallel bus systems. It shares identical pinout (A0–A16, I/O0–I/O7, CE, OE, WE, VCC, GND), 55 ns access timing, and standard read protocol (CE+OE low, WE high). However, unlike EPROMs, it requires no UV erasure and supports in-system reprogramming via software commands - enabling field updates without socket removal or external programmers.
AT49BV001AN-55VI 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:
- 55 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
AT49BV001AN-55VI FAQ
1.How can I place an order for AT49BV001AN-55VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001AN-55VI 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 AT49BV001AN-55VI reliable?
The price and inventory of AT49BV001AN-55VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001AN-55VI is usually 5 days.
3.What payment methods are accepted for AT49BV001AN-55VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001AN-55VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001AN-55VI?
AT49BV001AN-55VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001AN-55VI 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 AT49BV001AN-55VI?
For technical support, including AT49BV001AN-55VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001AN-55VI requirements.
6.How does Aetrix verify that AT49BV001AN-55VI is sourced from the original manufacturer or authorized distributors?
All AT49BV001AN-55VI 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 AT49BV001AN-55VI meets industry standards.
7.What is the process for return or replacement of AT49BV001AN-55VI?
All AT49BV001AN-55VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001AN-55VI, 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 AT49BV001AN-55VI part is unused and in its original packaging.
Return procedure for AT49BV001AN-55VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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