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Microchip Technology AT49F001AT-45VI
- Part No.:
- AT49F001AT-45VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F001AT-45VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,108
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Product details
Overview
AT49F001AT-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 (address range 1C000H–1FFFFH), two 8K-byte parameter blocks, and two main memory blocks (32K/64K bytes). It supports byte-by-byte programming at 30 µs/byte and operates across the industrial temperature range (−40°C to +85°C) in a 32-lead VSOP package.
For engineers reviewing the AT49F001AT-45VI datasheet, AT49F001AT-45VI pinout, AT49F001AT-45VI application, or AT49F001AT-45VI equivalent, this device serves as a drop-in replacement for legacy EPROM-based boot code storage in embedded controllers, offering hardware data protection, DATA polling, and toggle-bit programming status detection without requiring high-voltage programming circuitry.
Technical Context
The AT49F001AT-45VI implements a standard parallel Flash interface with CE/OE/WE control logic and internal command register architecture. Its sector erase capability targets discrete 8K-byte parameter blocks and 32K/64K main memory blocks independently, while the boot block (1C000H–1FFFFH) supports optional lockout via six-cycle command sequence.
Programming and erase operations are internally timed-no external clocks required-and feature hardware safeguards including VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and write-inhibit conditions (OE low, CE high, or WE high). The RESET pin enables boot block override at 12 V but is NC on AN(T) variants; for AT49F001AT-45VI, it is functional and supports both reset and lockout override.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full firmware image storage for 8-bit microcontrollers. |
| Read Access Time | 45 ns maximum - enables direct execution from Flash (XIP) in timing-critical boot loaders. |
| Chip Erase Time | 3 seconds typical - allows rapid field firmware updates without extended downtime. |
| Byte Programming Time | 30 µs typical - supports efficient runtime parameter updates in data logging or calibration applications. |
| Operating Voltage | 5 V ±10% - eliminates need for dedicated programming voltage regulators in 5V systems. |
| Standby Current | 50 µA CMOS - ensures ultra-low power retention during system sleep modes. |
| Endurance | 10,000 program/erase cycles - validated for long-term use in industrial control firmware revision cycles. |
| Temperature Range | −40°C to +85°C - qualified for deployment in automotive body control modules and industrial PLCs. |
Pinout & Package
AT49F001AT-45VI is housed in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm footprint, JEDEC MO-142 BA compliant, with gull-wing leads and pin 1 identifier notch. Package height is 1.20 mm max, lead coplanarity ≤0.10 mm.
| 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; when high, places outputs in high-impedance state to prevent bus contention. |
| OE | Output Enable | Active-low output control; used with CE to implement dual-line read gating for flexible bus arbitration. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing. |
| RESET | Reset / Lockout Override | Logic-high = normal operation; TTL-low = reset to read/standby mode; 12 V = unlock protected boot block. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for reads, byte programming, and command/data loading; supports DATA polling on I/O7 and toggle-bit detection on I/O6. |
| VCC | Power Supply | +5 V ±10% supply; internal regulation ensures stable core voltage during programming. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal logic; decoupling required per layout guidelines. |
| NC | No Connect | Pin 29 (VSOP) is unconnected - must be left floating or tied to GND per board design rules. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16K-byte boot block (1C000H–1FFFFH) can be permanently write-protected to preserve secure boot code while allowing field updates to application sectors. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit logic prevent accidental writes during power transients or EMI events. |
| DATA Polling & Toggle-Bit Status | I/O7 complement feedback and I/O6 toggling provide real-time, software-driven confirmation of programming/erase completion without timer overhead. |
| 5V-Only Command Set | All operations-including chip/sector erase and byte programming-execute using standard 5V logic levels, eliminating HV pump circuitry. |
| Industrial Temperature Qualification | Guaranteed 45 ns read access and full functionality across −40°C to +85°C ambient, suitable for under-hood or factory-floor deployment. |
Applications
| Embedded Boot Memory | Firmware Update Storage |
|---|---|
Use Scenario: Storing initial boot code for 8-bit microcontrollers in industrial HMIs where firmware integrity is critical. IC Role / Device Role / Timing Role: Nonvolatile boot ROM providing first-instruction fetch at power-on reset with deterministic 45 ns access latency. Use Value: Boot block lockout prevents corruption of startup routines during over-the-air updates to application sectors. |
Use Scenario: Field-upgradable parameter tables in programmable logic controllers requiring infrequent but reliable reprogramming. IC Role / Device Role / Timing Role: Sector-erasable Flash memory enabling selective update of configuration data without erasing entire firmware image. Use Value: Two independent 8K-byte parameter blocks allow A/B swapping for atomic configuration commits with rollback capability. |
| Legacy EPROM Replacement | Secure Code Vault |
Use Scenario: Drop-in upgrade of obsolete 27C010 EPROMs in medical device diagnostic subsystems. IC Role / Device Role / Timing Role: Pin-compatible parallel Flash with identical CE/OE/WE timing and 5V-only operation. Use Value: Eliminates UV-erasure step and socket programming; supports in-circuit reprogramming via standard JTAG or ISP interfaces. |
Use Scenario: Storing cryptographic keys and secure bootloader signatures in payment terminal secure elements. IC Role / Device Role / Timing Role: Write-protected boot block acting as immutable root-of-trust storage with 12 V override only accessible during factory provisioning. Use Value: Prevents runtime tampering while enabling controlled key revocation via hardware-secured override path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001MT-45EI | 45 ns access, 1 Mbit, 3.0 V core (with 5 V I/O), 12 V RESET not supported | Lacks 12 V boot block override; uses different command set and sector map | Preferred where lower active power (15 mA vs. 20 mA) and 3 V compatibility are prioritized over legacy 5 V simplicity. |
| SST39VF010-45-4C-NHE | 45 ns access, 1 Mbit, 3.3 V only, no 12 V RESET, top-boot sector (00000H–03FFFH) | Boot block located at lowest address; no 12 V override; requires 3.3 V supply and level-shifting in 5 V systems | Best suited for new 3.3 V designs needing higher endurance (100K cycles) and faster sector erase (18 ms), but incompatible with existing 5 V AT49F001AT-45VI layouts. |
Compared with AM29LV001MT-45EI and SST39VF010-45-4C-NHE, the AT49F001AT-45VI uniquely supports 5 V-only operation with hardware-protected boot block override via 12 V RESET-critical for secure field recovery in legacy 5 V embedded systems where voltage translation or firmware redesign is prohibited.
Availability
AT49F001AT-45VI is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical diagnostic equipment requiring stable component supply and long-term obsolescence management.
Supply support for AT49F001AT-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 industrial-grade nonvolatile memory solutions.
The AT49F001A(T) series was designed specifically for 5V embedded systems requiring in-system reprogrammability, secure boot code isolation, and drop-in EPROM replacement-targeting industrial automation, telecom infrastructure, and legacy automotive ECUs.
FAQ
What is the boot block address range for AT49F001AT-45VI?
The boot block for AT49F001AT-45VI occupies addresses 1C000H to 1FFFFH (16K bytes), distinct from the AT49F001A(N) variant's 00000H–03FFFH range. This high-address placement isolates boot code from main application memory, reducing collision risk during firmware updates. The AT49F001AT-45VI's sector map is confirmed in the "Command Definition" table and "Sector Erase" section of the datasheet.
Does AT49F001AT-45VI support 12 V RESET for boot block override?
Yes, AT49F001AT-45VI supports 12 V ±0.5 V applied to the RESET pin to temporarily disable boot block lockout, enabling chip/sector erase or byte programming of protected regions. This feature is explicitly documented in the "Boot Block Programming Lockout Override" section and is unavailable on AT49F001AN(T) variants. The AT49F001AT-45VI's RESET pin is functional and electrically rated per Absolute Maximum Ratings.
What package type does AT49F001AT-45VI use?
AT49F001AT-45VI uses a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm footprint, designated as package code "32V". Its mechanical dimensions, pin pitch (0.50 mm), and gull-wing lead profile comply with JEDEC MO-142 Variation BA. Pin 1 is marked by a notch, and pin 29 is NC-verified in the "Packaging Information" section and PLCC/TSOP/VSOP drawings.
How is programming completion detected on AT49F001AT-45VI?
AT49F001AT-45VI supports two hardware-confirmed methods: DATA polling (I/O7 returns complement of loaded data until completion, then true data) and toggle-bit detection (I/O6 toggles during operation, stops when complete). Both are usable at any point during programming and require no external timing-details are specified in the "DATA Polling Waveforms" and "Toggle Bit Waveforms" sections of the datasheet.
What is the minimum VCC required to enable programming on AT49F001AT-45VI?
Programming is inhibited if VCC falls below 3.8 V (typical), as enforced by internal VCC sense circuitry. This hardware protection prevents partial writes during brown-out conditions. The AT49F001AT-45VI's DC Characteristics table specifies VCC = 5 V ±10%, and the "Hardware Data Protection" section confirms the 3.8 V threshold is a design-enforced safety margin-not a recommended operating point.
AT49F001AT-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
AT49F001AT-45VI FAQ
1.How can I place an order for AT49F001AT-45VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001AT-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 AT49F001AT-45VI reliable?
The price and inventory of AT49F001AT-45VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001AT-45VI is usually 5 days.
3.What payment methods are accepted for AT49F001AT-45VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001AT-45VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001AT-45VI?
AT49F001AT-45VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001AT-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 AT49F001AT-45VI?
For technical support, including AT49F001AT-45VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001AT-45VI requirements.
6.How does Aetrix verify that AT49F001AT-45VI is sourced from the original manufacturer or authorized distributors?
All AT49F001AT-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 AT49F001AT-45VI meets industry standards.
7.What is the process for return or replacement of AT49F001AT-45VI?
All AT49F001AT-45VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001AT-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 AT49F001AT-45VI part is unused and in its original packaging.
Return procedure for AT49F001AT-45VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001AT-45VI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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