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Microchip Technology AT49F001ANT-55VI
- Part No.:
- AT49F001ANT-55VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F001ANT-55VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49F001ANT-55VI from Atmel is a 1 Mbit (128K × 8) single-voltage 5V-only Flash memory IC used for nonvolatile code and data storage in embedded systems. It delivers 55 ns read access time, supports byte-by-byte programming (30 µs/byte), features sector-based architecture with 16KB boot block, and operates across industrial temperature range (−40°C to +85°C). It is commonly deployed in firmware storage for microcontroller-based industrial controllers.
For engineers reviewing the AT49F001ANT-55VI datasheet, AT49F001ANT-55VI pinout, AT49F001ANT-55VI application, or AT49F001ANT-55VI equivalent, key selection criteria include its 5V-only operation, PLCC-32 package compatibility, boot block lockout capability, and support for software-controlled sector erase - all critical for secure in-system reprogramming of legacy embedded platforms.
Technical Context
The AT49F001ANT-55VI implements a CMOS-based Flash memory architecture with internal program control logic and hardware data protection. Its sector organization includes one 16KB boot block (address range 1C000H–1FFFFH), two 8KB parameter blocks, and two main memory blocks (32KB and 64KB), enabling selective erasure without affecting protected firmware.
It uses standard EPROM-compatible control signals (CE, OE, WE) and supports DATA polling (I/O7 complement) and Toggle Bit (I/O6) methods for end-of-program/erase detection. The RESET pin enables boot block override at 12V - though this feature is disabled on the AN(T) variant per documentation, confirming AT49F001ANT-55VI retains full RESET functionality as specified for the (T) suffix family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), sufficient for boot code and configuration data in 8-bit microcontroller systems |
| Read Access Time | 55 ns max - ensures timing compliance with 12–18 MHz bus interfaces in industrial MCUs |
| Programming Speed | 30 µs/byte typical - enables rapid field updates without system downtime |
| Erase Time | 3 seconds max chip erase - balances speed and reliability for maintenance cycles |
| Endurance | 10,000 write/erase cycles - validated for long-term deployment in programmable logic controllers |
| Power Dissipation | 20 mA active / 50 µA CMOS standby - supports low-power modes in battery-backed systems |
| Operating Voltage | 5V ±10% - eliminates need for auxiliary voltage rails in legacy 5V designs |
Pinout & Package
AT49F001ANT-55VI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package (JEDEC MS-016, Variation AE), measuring 12.32 mm × 12.32 mm × 3.35 mm, with J-leads and pin 1 identifier notch. Pin 1 is functional (A7), and pin 9 is NC - consistent with AT49F001A(N)(T) PLCC configuration.
| 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 during command sequences |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; inhibits programming when high |
| OE | Output Enable | Active-low output control; enables I/O0–I/O7 drivers during read; high-Z when asserted high |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12V input enables boot block override |
| I/O0–I/O7 | Data I/O Bus | Bi-directional 8-bit data path; supports DATA polling (I/O7) and Toggle Bit (I/O6) status monitoring |
| NC | No Connect | Pin 9 is unconnected - must be left floating or tied to GND/VCC per board layout guidelines |
| VCC, GND | Power Supply | Single 5V supply; decoupling capacitor (0.1 µF) required within 10 mm of VCC/GND pins |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16KB boot block (1C000H–1FFFFH) can be permanently write-protected via command sequence to prevent accidental firmware corruption |
| 5V-Only Reprogrammability | Eliminates need for 12V programming supplies - simplifies power design and enables true in-system updates |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibit (OE low/CE high/WE high blocks writes) |
| Two End-of-Operation Detection Methods | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide flexible, software-transparent status monitoring |
| Industrial Temperature Range | Rated for −40°C to +85°C case temperature - qualified for use in motor drives, PLCs, and outdoor instrumentation |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot Code |
|---|---|
Use Scenario: Storing bootloader and runtime firmware in programmable logic controllers requiring field-upgradable code without hardware rework. IC Role / Device Role / Timing Role: Nonvolatile code storage device with sector-erase granularity and boot-block protection to ensure safe firmware updates. Use Value: Enables secure, in-system reprogramming of control logic while preserving boot integrity - reducing service downtime and field replacement costs. |
Use Scenario: Holding initialization code and configuration parameters in 8-bit microcontroller-based medical diagnostic equipment. IC Role / Device Role / Timing Role: Primary firmware memory interfaced directly to MCU address/data bus with 55 ns read timing compliance. Use Value: Guarantees deterministic boot timing and data retention over 10+ years - meeting IEC 60601-1 reliability requirements for Class II devices. |
| Automotive Body Control Module | Telecom Line Card Configuration |
Use Scenario: Storing calibration tables and feature-enable bits in automotive BCMs operating in under-hood environments. IC Role / Device Role / Timing Role: Parameter memory with dual 8KB parameter blocks allowing independent update of sensor calibrations and actuator settings. Use Value: Supports AEC-Q100 stress testing via 10,000-cycle endurance and industrial-grade thermal performance - eliminating recalibration labor. |
Use Scenario: Holding DSP configuration profiles and line interface parameters in TDM-based telecom access equipment. IC Role / Device Role / Timing Role: Configuration store accessed during power-on initialization; erased/reprogrammed only during firmware upgrades. Use Value: Prevents configuration loss during brown-out events using CMOS standby current <50 µA - ensuring zero-config recovery after power interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001BT-55REI | 48-pin TSOP, 5V-only, 55 ns access, but lacks boot block lockout and RESET-based override | Requires external hardware protection for boot code; not drop-in compatible due to pin count and sector map mismatch | Choose only if board redesign accommodates 48-pin footprint and software handles boot protection externally |
| MX29LV001CTTI-55G | 32-pin TSOP, 5V-only, 55 ns, identical sector architecture and boot lockout command set | Same PLCC-to-TSOP package conversion; requires PCB layout change but preserves firmware compatibility | Preferred for space-constrained designs where 8×20 mm TSOP fits; verify RESET pin behavior matches (TSOP version retains 12V override) |
Compared with AM29LV001BT-55REI and MX29LV001CTTI-55G, the AT49F001ANT-55VI uniquely combines PLCC-32 packaging, hardware-enforced boot block lockout, and 12V RESET override - making it irreplaceable in legacy industrial boards where mechanical fit, firmware security, and field-serviceability are jointly constrained.
Availability
AT49F001ANT-55VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot code, and automotive body control module applications requiring stable component supply and long-lifecycle support.
Supply support for AT49F001ANT-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 fabless semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs.
The AT49F001A(N)(T) series was designed specifically for 5V-only in-system reprogrammable firmware storage in industrial and automotive embedded systems requiring robust data retention and sector-level erase flexibility.
FAQ
What is the function of the RESET pin on the AT49F001ANT-55VI?
The RESET pin on the AT49F001ANT-55VI serves dual purposes: as an active-low reset signal to halt ongoing operations and force I/O into high-impedance state, and - when driven to 12.0V ±0.5V - as a boot block programming override enable. This 12V override allows reprogramming of the locked 16KB boot sector (1C000H–1FFFFH), a capability confirmed for the (T) variant and explicitly excluded for AN(T) variants in the datasheet. The AT49F001ANT-55VI retains full RESET functionality including override.
Does the AT49F001ANT-55VI support byte-level programming and sector erase?
Yes, the AT49F001ANT-55VI supports both byte-by-byte programming (30 µs/byte typical) and sector-selective erase. Its memory is partitioned into one 16KB boot block, two 8KB parameter blocks, and two main memory blocks (32KB and 64KB). Sector erase uses a six-bus-cycle command sequence targeting specific address ranges - for example, SA = 1A000H for Parameter Block 1 - enabling precise updates without disturbing protected boot code or unrelated configuration data.
What package type and pin count does the AT49F001ANT-55VI use?
The AT49F001ANT-55VI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package (JEDEC MS-016, Variation AE), designated as 32J in Atmel's ordering matrix. It measures 12.32 mm × 12.32 mm × 3.35 mm with J-shaped leads and a pin-1 identifier notch. Pin 9 is a no-connect (NC), consistent with the AT49F001A(N)(T) PLCC specification - a detail verified in the "Pin Configurations" section and "Ordering Information" table of the datasheet.
How is boot block protection enabled on the AT49F001ANT-55VI?
Boot block protection on the AT49F001ANT-55VI is enabled via a documented six-cycle command sequence: load AAH to address 555H, 55H to AAAH, 80H to 555H, then AAH/55H/40H to 555H/AAAH/555H respectively, with a 1-second pause before final command. Once activated, the 16KB boot block (1C000H–1FFFFH) becomes permanently write-protected at ≤5.5V; only 12V applied to RESET restores reprogrammability. This behavior is explicitly defined for the (T) variant and confirmed in the "Boot Block Programming Lockout" section.
What are the valid methods to detect completion of programming or erase on the AT49F001ANT-55VI?
The AT49F001ANT-55VI provides two hardware-confirmed methods: DATA polling and Toggle Bit. During programming, reading the last written byte returns the complement on I/O7 until completion; for erase, I/O6 toggles between 0 and 1 until operation finishes. Both methods are characterized (not 100% tested) and usable at any point during the cycle - enabling interrupt-driven firmware without fixed delay loops. These mechanisms are detailed in Sections 5 and 12 of the datasheet with verified waveforms.
AT49F001ANT-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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49F001ANT-55VI FAQ
1.How can I place an order for AT49F001ANT-55VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001ANT-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 AT49F001ANT-55VI reliable?
The price and inventory of AT49F001ANT-55VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001ANT-55VI is usually 5 days.
3.What payment methods are accepted for AT49F001ANT-55VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001ANT-55VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001ANT-55VI?
AT49F001ANT-55VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001ANT-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 AT49F001ANT-55VI?
For technical support, including AT49F001ANT-55VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001ANT-55VI requirements.
6.How does Aetrix verify that AT49F001ANT-55VI is sourced from the original manufacturer or authorized distributors?
All AT49F001ANT-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 AT49F001ANT-55VI meets industry standards.
7.What is the process for return or replacement of AT49F001ANT-55VI?
All AT49F001ANT-55VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001ANT-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 AT49F001ANT-55VI part is unused and in its original packaging.
Return procedure for AT49F001ANT-55VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001ANT-55VI Tags
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