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Microchip Technology AT49BV001AT-55VI
- Part No.:
- AT49BV001AT-55VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49BV001AT-55VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,413
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Product details
Overview
AT49BV001AT-55VI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC with 55 ns read access time, 30 µs/byte programming, and sector-based erase architecture including a 16K-byte boot block with programmable lockout. It operates across the industrial temperature range (−40°C to +85°C) and is used for firmware storage and code execution in embedded controllers and boot loaders.
For engineers reviewing the AT49BV001AT-55VI datasheet, AT49BV001AT-55VI pinout, AT49BV001AT-55VI application, or AT49BV001AT-55VI equivalent, this page delivers verified technical context, package mapping, sector address layout, hardware data protection mechanisms, and real-world use-value for secure boot memory design.
Technical Context
The AT49BV001AT-55VI implements a standard parallel Flash interface with CE/OE/WE control logic, supports EPROM-like read operation, and uses command sequences (e.g., 6-cycle chip erase, 4-cycle byte program) latched on WE/CE edges. Its internal program control includes automatic pulse generation and DATA polling via I/O7 complement detection.
It features a fixed sector map: boot block at 1C000H–1FFFFH (16K bytes), two parameter blocks (1A000H–1BFFFH and 18000H–19FFFH, each 8K bytes), and two main memory blocks (10000H–17FFFH = 32K bytes; 00000H–0FFFFH = 64K bytes). The RESET pin enables boot block override at 12 V but is functional only on the T-suffix variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (128K × 8), enabling full firmware image storage for 8-bit microcontrollers |
| Read Access Time | 55 ns - meets timing requirements for 18 MHz bus interfaces without wait states |
| Byte Programming Time | 30 µs typical - allows rapid field updates of configuration or calibration data |
| Erase Cycle Time | 3 seconds max for full chip - supports in-system reprogramming during maintenance windows |
| Supply Voltage | 2.7–3.6 V - compatible with battery-backed or low-voltage regulated systems |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded applications |
| Endurance | 10,000 write/erase cycles - sufficient for firmware revision management over product lifetime |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in always-on subsystems |
Pinout & Package
AT49BV001AT-55VI is packaged in a 32-lead VSOP (8 × 14 mm), JEDEC MO-142 BA-compliant surface-mount package with gull-wing leads and pin 1 identifier notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A11–A16 are don't-care in some command cycles |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read, program, and identification modes; supports DATA polling on I/O7 and toggle bit on I/O6 |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; controls command latch timing |
| OE | Output Enable | Active-low output gate; enables data bus drivers during read; high during programming to prevent contention |
| WE | Write Enable | Active-low write strobe; latches addresses and data during program/erase command sequences |
| RESET | Reset / Boot Override | Active-low reset; when driven to 12 V ±0.5 V, overrides boot block lockout - unique to T-suffix variants |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage sensing disables programming if below 1.8 V |
| GND | Ground | Reference return for all signals and power; decoupling required per high-speed Flash layout guidelines |
| NC | No Connect | Pin 9 in TSOP/VSOP packages - must remain unconnected; not bonded internally |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte sector (1C000H–1FFFFH) permanently protected after command sequence; prevents accidental overwrite of boot code |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulses rejected), and multi-signal inhibit (OE low/CE high/WE high) prevent spurious writes |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, bus-compatible program/erase completion detection without external timers |
| Sector-Erase Flexibility | Independent erasure of two 8K parameter blocks and two main memory blocks (32K + 64K) enables granular firmware updates |
| 12 V RESET Override | Applying 12 V to RESET pin temporarily disables boot lockout - critical for recovery in locked-field deployments |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Loader |
|---|---|
Use Scenario: Storing and executing boot firmware in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast 55 ns read access and hardware-protected boot sector ensuring deterministic startup under EMI stress. Use Value: Prevents unauthorized or accidental modification of safety-critical boot code while enabling field-upgradable application firmware in main memory blocks. | Use Scenario: Securing bootloader integrity in Class II medical devices requiring FDA-compliant firmware update workflows and audit trails. IC Role / Device Role / Timing Role: Trusted boot memory with 12 V RESET override capability for emergency recovery and software product identification for traceability. Use Value: Enables regulatory-compliant reprogramming via controlled command sequences while maintaining immutable boot code through hardware lockout. |
| Automotive Body Control Module | Telecom Remote Node Configuration |
Use Scenario: Holding calibrated sensor parameters and CAN stack initialization code in body control units operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Low-power (50 µA standby) Flash memory with sector-erase granularity for updating calibration tables without disturbing boot logic. Use Value: Reduces system power budget during sleep mode and supports over-the-air parameter updates via isolated parameter blocks. | Use Scenario: Storing configuration profiles and protocol stacks in remote telecom nodes where physical access is limited and reliability is mission-critical. IC Role / Device Role / Timing Role: In-system reprogrammable memory with DATA polling for autonomous write verification and 10,000-cycle endurance for long-term deployment. Use Value: Eliminates need for external programming hardware; enables remote firmware patching with built-in end-of-program confirmation. |
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 | 512K × 16 organization; 3.0–3.6 V supply; no 12 V RESET override; boot block at 00000H–03FFFH | Lacks 12 V override and has different sector map; requires bus-width adaptation for 8-bit systems | Choose when 16-bit data bus and lower density suffice and boot block location alignment is acceptable. |
| MX29LV001CTTI-55G | 1 Mbit (128K × 8); 3.0–3.6 V; 55 ns access; boot block at 00000H–03FFFH; no 12 V RESET pin function | Boot block resides at bottom of address space instead of top; no hardware override mechanism for lockout | Prefer when legacy board layout uses bottom-aligned boot sectors and 12 V recovery is managed externally. |
Compared with SST39VF010-55-4C-NHE and MX29LV001CTTI-55G, the AT49BV001AT-55VI uniquely provides top-aligned boot block (1C000H–1FFFFH), 12 V RESET override for emergency reprogramming, and native 8-bit bus compatibility - making it optimal for new designs requiring secure, recoverable boot memory.
Availability
AT49BV001AT-55VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot loader implementation, automotive body control module calibration, telecom remote node configuration, and embedded system code execution requiring stable component supply and long-lifecycle support.
Supply support for AT49BV001AT-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, nonvolatile memory, and security ICs, with a legacy of robust Flash technology for embedded systems.
The AT49BV001AT-55VI belongs to Atmel's Battery-Voltage™ Flash memory family, designed specifically for reliable, low-voltage in-system reprogramming in resource-constrained industrial and automotive applications.
FAQ
What is the boot block address range for AT49BV001AT-55VI?
The AT49BV001AT-55VI boot block occupies address range 1C000H to 1FFFFH (16K bytes), distinct from the base-aligned boot block in non-T variants. This top-aligned placement isolates boot code from main application updates and is confirmed in the device's sector map and command definitions table. The AT49BV001AT-55VI datasheet explicitly defines this range for the T-suffix version.
Does AT49BV001AT-55VI support 12 V RESET override for boot block reprogramming?
Yes, AT49BV001AT-55VI supports 12 V ±0.5 V applied to the RESET pin to temporarily disable boot block programming lockout during chip erase, sector erase, or byte programming. This feature is documented as unavailable on AN(T) variants but explicitly enabled for AT49BV001AT-55VI in the "Boot Block Programming Lockout Override" section and pin function table.
What package type is used by AT49BV001AT-55VI?
AT49BV001AT-55VI uses the 32-lead VSOP (8 × 14 mm) package, designated as ordering code suffix "V" and drawing number 32V. This JEDEC MO-142 BA-compliant thin small outline package features gull-wing leads, pin 1 identifier notch, and is distinct from PLCC (J) and TSOP (T) variants listed in the same datasheet.
How does DATA polling work on AT49BV001AT-55VI?
During byte programming, reading the last loaded address returns the complement of the programmed data on I/O7; once programming completes, true data appears. This allows host processors to poll I/O7 without timers or interrupts. The AT49BV001AT-55VI datasheet confirms this behavior in the "DATA Polling" section and specifies tDH and tOEH timing constraints for reliable detection.
What is the maximum erase time for AT49BV001AT-55VI?
The maximum erase cycle time for AT49BV001AT-55VI is 5 seconds, with a typical value of 3 seconds, as specified in the "AC Characteristics" table under tEC. This applies to both full chip erase and sector erase operations and is guaranteed across the industrial temperature range (−40°C to +85°C).
AT49BV001AT-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
AT49BV001AT-55VI FAQ
1.How can I place an order for AT49BV001AT-55VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001AT-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 AT49BV001AT-55VI reliable?
The price and inventory of AT49BV001AT-55VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001AT-55VI is usually 5 days.
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AT49BV001AT-55VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001AT-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 AT49BV001AT-55VI?
For technical support, including AT49BV001AT-55VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001AT-55VI requirements.
6.How does Aetrix verify that AT49BV001AT-55VI is sourced from the original manufacturer or authorized distributors?
All AT49BV001AT-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 AT49BV001AT-55VI meets industry standards.
7.What is the process for return or replacement of AT49BV001AT-55VI?
All AT49BV001AT-55VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001AT-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 AT49BV001AT-55VI part is unused and in its original packaging.
Return procedure for AT49BV001AT-55VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV001AT-55VI Tags
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