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Microchip Technology AT49F001AN-45VI
- Part No.:
- AT49F001AN-45VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F001AN-45VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49F001AN-45VI from Atmel is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory with 45 ns read access time, 3-second chip erase cycle, and sector architecture comprising one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). It operates across the industrial temperature range (−40°C to +85°C) and supports byte-by-byte programming at 30 µs/byte for embedded firmware storage in microcontroller-based systems.
For engineers reviewing the AT49F001AN-45VI datasheet, AT49F001AN-45VI pinout, AT49F001AN-45VI application, or AT49F001AN-45VI equivalent, this device delivers deterministic timing for boot code integrity, hardware data protection via VCC sense and noise filtering, DATA polling and toggle-bit program/erase status detection, and boot block lockout with optional 12V override - all critical for reliable firmware updates in industrial control and legacy system upgrades.
Technical Context
The AT49F001AN-45VI implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based programming/erasure. Its internal program control logic handles autonomous byte programming and sector/chip erase without external clocks, using six-cycle command sequences latched on WE/CE edges.
It features dual-mode boot block protection: software-enabled lockout prevents reprogramming of the 16K-byte boot sector (address range 00000H–03FFFH for AT49F001AN), and hardware override via 12V on RESET (not available on AT49F001AN-45VI per datasheet note). The device uses CMOS standby current <50 µA and active current ≤20 mA, with hardware safeguards including VCC sense (<3.8V inhibits programming) and 15 ns noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for full bootloader + configuration data in resource-constrained systems. |
| Read Access Time | 45 ns max - enables direct execution from Flash (XIP) in 20 MHz+ bus systems without wait states. |
| Erase Cycle Time | 3 seconds typical for full chip erase - supports rapid field firmware recovery without extended downtime. |
| Byte Programming Time | 30 µs typical - allows fine-grained patching of firmware images without bulk rewrites. |
| Operating Voltage | 5.0 V ±10% - eliminates need for auxiliary high-voltage programming supplies; compatible with legacy 5V logic buses. |
| Temperature Range | −40°C to +85°C (industrial) - validated for deployment in factory automation, telecom line cards, and transportation electronics. |
| Standby Current | 50 µA CMOS - reduces power budget in always-on embedded controllers during idle periods. |
Pinout & Package
AT49F001AN-45VI is supplied in a 32-lead Plastic Thin Small Outline Package (VSOP), 8 mm × 14 mm footprint (JEDEC MO-142 BA), with gull-wing leads and pin 1 identifier marked on top surface. Pin 9 is no-connect (NC) per datasheet specification for TSOP/VSOP variants.
| 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. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; inhibits programming when high. |
| OE | Output Enable | Active-low output gate; controls data bus tristate; high disables outputs to prevent bus contention. |
| WE | Write Enable | Active-low write strobe; latches addresses/data during programming/erase command sequences; noise-filtered (15 ns). |
| I/O0–I/O7 | Data Bus | Bidirectional 8-bit data path; supports DATA polling (I/O7 complement) and toggle-bit detection (I/O6 toggling) for cycle completion. |
| VCC | Power Supply | +5.0 V ±10% supply; internal VCC sense circuitry disables programming if voltage drops below ~3.8 V. |
| GND | Ground | Reference return for all signals; decoupling required within 10 mm of VCC pin per layout guidelines. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-impedance outputs; 12V override capability is not present on AT49F001AN-45VI. |
| NC (Pin 9) | No Connect | Unbonded terminal; must remain unconnected on PCB; not usable as spare I/O or ground. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent erasability of boot (16K), parameter (2×8K), and main memory (32K+64K) blocks enables modular firmware updates without full chip erase. |
| Boot Block Lockout | Software-enabled permanent write protection for boot code (00000H–03FFFH); prevents accidental corruption during field upgrades. |
| DATA Polling & Toggle Bit | Real-time, bus-compatible status reporting via I/O7 (complement) or I/O6 (toggle) eliminates need for fixed delay timers in host firmware. |
| Hardware Data Protection | VCC sense, WE/CE noise filtering, and control-line interlock (OE low/CE high/WE high inhibits programming) prevent spurious writes. |
| 5V-Only Operation | Eliminates requirement for 12V programming supply or charge pumps - simplifies power design and reduces BOM cost. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot Memory |
|---|---|
|
Use Scenario: Storing boot loader and real-time control firmware in programmable logic controllers deployed in factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 45 ns read access to initialize CPU and peripherals before runtime code execution. Use Value: Sector erase capability allows field updates to application firmware while preserving locked boot code, ensuring system recoverability after failed updates. |
Use Scenario: Replacing obsolete EPROMs in aging medical diagnostic equipment where board space and 5V compatibility are constraints. IC Role / Device Role / Timing Role: Drop-in Flash replacement for 27C010 EPROMs, leveraging identical pinout and read protocol with added in-system reprogrammability. Use Value: Eliminates need for UV erasers and socket programmers; enables remote firmware patches via existing JTAG or serial interfaces. |
| Telecom Line Card Configuration | Automotive Body Control Module Storage |
|
Use Scenario: Holding configuration tables and calibration data in DSLAM line cards requiring infrequent but critical updates over 10+ year service life. IC Role / Device Role / Timing Role: Parameter block storage (2×8K) for field-serviceable settings, isolated from main firmware to avoid accidental overwrite. Use Value: Hardware lockout and 10,000-cycle endurance ensure data integrity across decades of thermal cycling and power interruptions. |
Use Scenario: Storing vehicle-specific initialization routines and sensor calibration maps in body control modules operating in under-hood environments. IC Role / Device Role / Timing Role: Industrial-grade Flash memory with −40°C to +85°C operation and 50 µA standby current for always-on subsystems. Use Value: Low active power (20 mA) and robust erase/write reliability reduce thermal load and extend module lifetime in constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001BT-45EI | 45 ns access, 1 Mbit, 3.0 V core (3.3 V I/O), bottom-boot sector (00000H–00FFFH), no 12V RESET override. | Requires level-shifting for 5V bus systems; boot sector size and location differ - may require firmware address remapping. | Select when migrating to 3.3 V systems or when smaller boot sector suffices; verify command set compatibility before redesign. |
| SST39VF010-45-4C-NHE | 45 ns access, 1 Mbit, 3.3 V only, uniform 4K sectors, no boot-block lockout, supports 3-byte command sequences. | Lacks dedicated boot protection; requires external logic or software checks to safeguard startup code. | Prefer for cost-sensitive 3.3 V designs where full-sector flexibility outweighs boot security; not suitable for legacy 5V platforms. |
Compared with AM29LV001BT-45EI and SST39VF010-45-4C-NHE, the AT49F001AN-45VI uniquely provides 5V-native operation with hardware-enforced boot block lockout and 12V override capability (though disabled on this variant), making it optimal for maintaining legacy 5V infrastructure with robust firmware integrity requirements.
Availability
AT49F001AN-45VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot memory, and telecom line card configuration requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AT49F001AN-45VI 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, with a legacy of robust nonvolatile memory solutions for industrial and automotive markets.
The AT49F001A(N)(T) family was designed specifically for in-system reprogrammable firmware storage in 5V microcontroller platforms, emphasizing boot code protection, deterministic timing, and compatibility with legacy EPROM sockets and programmers.
FAQ
What is the memory organization of the AT49F001AN-45VI?
The AT49F001AN-45VI contains 1 Mbit (131,072 × 8) of Flash memory organized as 128K words by 8 bits. Its sector architecture includes one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks totaling 96K bytes (32K + 64K). This layout enables selective erasure and programming without affecting protected boot code in the AT49F001AN-45VI.
Does the AT49F001AN-45VI support 12V RESET override for boot block reprogramming?
No, the AT49F001AN-45VI does not support 12V RESET override. Datasheet Note 6 explicitly states that the RESET feature - including 12V override for boot block reprogramming - is not available on AT49F001AN(T) variants. The AT49F001AN-45VI relies solely on software-enabled boot block lockout, which becomes permanent once activated.
What package type is used for the AT49F001AN-45VI?
The AT49F001AN-45VI uses a 32-lead Plastic Thin Small Outline Package (VSOP), 8 mm × 14 mm footprint (JEDEC MO-142 BA). Pin 9 is designated as no-connect (NC), consistent with TSOP/VSOP variants of the AT49F001A(N)(T) family. The VSOP package offers compact board area and gull-wing leads compatible with standard SMT reflow profiles.
How does the AT49F001AN-45VI indicate completion of a programming cycle?
The AT49F001AN-45VI provides two hardware methods: DATA polling (I/O7 returns complement of written data until complete, then true data) and toggle-bit detection (I/O6 toggles between 0 and 1 during programming, then stabilizes). Both operate asynchronously and require no external clocks, enabling efficient host firmware polling without fixed delays in the AT49F001AN-45VI.
What is the maximum number of program/erase cycles rated for the AT49F001AN-45VI?
The AT49F001AN-45VI is rated for a typical 10,000 program/erase cycles per memory location. This endurance rating applies across all sectors - boot, parameter, and main memory - and is validated over the full industrial temperature range (−40°C to +85°C), ensuring long-term reliability in field-upgradable systems using the AT49F001AN-45VI.
AT49F001AN-45VI 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:
- 45 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49F001AN-45VI FAQ
1.How can I place an order for AT49F001AN-45VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001AN-45VI 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 AT49F001AN-45VI reliable?
The price and inventory of AT49F001AN-45VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001AN-45VI is usually 5 days.
3.What payment methods are accepted for AT49F001AN-45VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001AN-45VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001AN-45VI?
AT49F001AN-45VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001AN-45VI 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 AT49F001AN-45VI?
For technical support, including AT49F001AN-45VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001AN-45VI requirements.
6.How does Aetrix verify that AT49F001AN-45VI is sourced from the original manufacturer or authorized distributors?
All AT49F001AN-45VI 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 AT49F001AN-45VI meets industry standards.
7.What is the process for return or replacement of AT49F001AN-45VI?
All AT49F001AN-45VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001AN-45VI, 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 AT49F001AN-45VI part is unused and in its original packaging.
Return procedure for AT49F001AN-45VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001AN-45VI Tags
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M24C02-WMN6TP
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