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Microchip Technology AT49F001ANT-55TI
- Part No.:
- AT49F001ANT-55TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001ANT-55TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,195
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Product details
Overview
AT49F001ANT-55TI from Atmel is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory with 55 ns read access time, 3-second chip erase cycle, 30 µs/byte programming, and sector-based 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 in embedded firmware storage for microcontroller-based industrial controllers.
For engineers reviewing the AT49F001ANT-55TI datasheet, AT49F001ANT-55TI pinout, AT49F001ANT-55TI application, or AT49F001ANT-55TI equivalent, key selection considerations include its TSOP-32 package compatibility, 5V-only command interface, boot-block protection mechanism, DATA polling and toggle-bit programming status detection, and hardware write-inhibit features including VCC sense and noise filtering.
Technical Context
The AT49F001ANT-55TI implements a sector-erasable Flash architecture with one 16K-byte boot block (address range 1C000H–1FFFFH), two 8K-byte parameter blocks, and two main memory blocks (32K and 64K bytes). Its command-set-driven operation uses standard CE/OE/WE control lines and supports software-controlled chip erase, sector erase, and byte programming without external high-voltage circuitry.
It integrates internal program control logic and timers, enabling autonomous erase and programming cycles. The device supports both DATA polling (I/O7 complement behavior) and toggle-bit (I/O6 toggling) methods for end-of-cycle detection, and includes hardware data protection via VCC sensing (<3.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and control-line gating (OE low / CE high / WE high disables writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - directly maps to 16-bit microcontroller data bus with byte-wide access. |
| Read Access Time | 55 ns maximum - enables direct interfacing with 12–18 MHz microcontrollers without wait states. |
| Chip Erase Time | 3 seconds typical - allows rapid field firmware updates without requiring external erasure equipment. |
| Byte Programming Time | 30 µs typical - supports real-time parameter logging or configuration patching in embedded systems. |
| Standby Current | 50 µA CMOS - ensures ultra-low power retention during system sleep modes in battery-backed applications. |
| Endurance | 10,000 program/erase cycles - qualifies for long-life industrial firmware storage with infrequent field updates. |
| Operating Voltage | 5.0 V ±10% - eliminates need for dedicated programming voltage regulators in 5V system designs. |
Pinout & Package
AT49F001ANT-55TI is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 × 20 mm, package code 32T), compliant with JEDEC MO-142 Variation BD. Pin 1 is marked by a beveled corner; pin 9 is NC (no connect) per datasheet note.
| 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 read access; dual-control prevents bus contention. |
| OE | Output Enable | Active-low output gate; high-Z when asserted high, enabling shared data bus operation. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; carries command data, product ID codes, and memory contents; supports DATA polling on I/O7 and toggle-bit on I/O6. |
| RESET | Reset Input | Active-low reset halts operations and forces outputs to high-Z; 12V override enables boot-block reprogramming (not available on AN(T) variants). |
| VCC | Power Supply | +5.0 V ±10% supply; internal VCC sense disables programming if voltage drops below ~3.8 V. |
| GND | Ground Reference | Signal and power ground reference for all inputs, outputs, and internal logic. |
| NC | No Connect | Pin 9 is unconnected - must be left floating or tied to GND/VCC per board layout best practices; not bonded internally. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16K-byte boot block (1C000H–1FFFFH) can be permanently write-protected via command sequence, securing bootloader code while allowing runtime updates to application sectors. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns), and control-line gating prevent accidental writes - eliminates need for external write-protection logic in rugged environments. |
| Two-Method Programming Status Detection | Simultaneous support for DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) enables robust, timing-agnostic firmware update verification without external clocks. |
| 5V-Only In-System Reprogrammability | Eliminates requirement for 12V programming supplies - simplifies PCB design and enables field firmware upgrades via standard 5V system rails. |
| Industrial Temperature Range Support | Specified for −40°C to +85°C case temperature - validated for use in motor drives, PLC modules, and outdoor telemetry equipment. |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controller (PLC) CPU modules requiring field-upgradable logic and safety-critical boot code integrity. IC Role / Device Role / Timing Role: Nonvolatile program memory holding bootloader, runtime firmware, and user-defined function blocks; accessed via 8-bit parallel bus with 55 ns read latency. Use Value: Boot block lockout ensures certified startup code remains immutable during application updates, meeting IEC 61131-3 functional safety requirements for deterministic boot behavior. |
Use Scenario: Providing secure, updatable boot code storage for 8/16-bit microcontrollers in medical diagnostic instruments where regulatory compliance mandates verified boot sequences. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; delivers first instruction within 55 ns of address assertion, enabling sub-100 µs cold-start response. Use Value: 12V RESET override allows authorized reprogramming of protected boot sector during factory calibration or regulatory recertification - no PCB redesign required. |
| Telecom Line Card Configuration | Automotive ECU Parameter Storage |
Use Scenario: Holding line-specific provisioning data, DSP coefficients, and protocol stack parameters in DSLAM and optical line terminal (OLT) line cards subject to frequent service profile changes. IC Role / Device Role / Timing Role: Parameter block storage (two 8K-byte sections) accessible via sector-erase - enables atomic updates of service profiles without disrupting active traffic. Use Value: 3-second sector erase enables <100 ms service reconfiguration windows, minimizing subscriber downtime during dynamic bandwidth allocation. |
Use Scenario: Storing adaptive engine calibration tables, fault logs, and emission control parameters in automotive engine control units (ECUs) operating under wide thermal and electrical stress. IC Role / Device Role / Timing Role: Main memory block (32K/64K) storing runtime-tunable maps; accessed via microcontroller's external memory interface with hardware write-inhibit for crash-safe logging. Use Value: 50 µA standby current and VCC-sense protection ensure reliable parameter retention during vehicle ignition-off periods and brown-out conditions. |
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 SOJ package; 55 ns access; 3.3 V core with 5 V I/O tolerance; requires 12 V for reset override. | Designed for 3.3 V systems with 5 V tolerant I/O; lacks dedicated boot-block lockout - uses sector protection bits instead. | Select when migrating to lower-voltage platforms or requiring higher pin-count packaging; verify reset override voltage compatibility. |
| MX29LV001CTTI-55G | 32-pin TSOP; 55 ns access; 3.3 V operation only; no 5 V compatibility; boot block size is 16K but lockout is software-configurable only. | Not 5 V compatible - requires level-shifting in legacy 5 V designs; boot protection relies on software flags, not hardware lockout. | Choose for new 3.3 V designs prioritizing lower power; avoid in existing 5 V systems without voltage translation. |
Compared with AM29LV001BT-55REI and MX29LV001CTTI-55G, the AT49F001ANT-55TI uniquely combines 5 V-only operation, hardware-enforced boot-block lockout, and TSOP-32 packaging - making it optimal for cost-sensitive, drop-in replacements in legacy industrial 5 V controller designs requiring guaranteed boot code immutability.
Availability
AT49F001ANT-55TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, and telecom line card configuration requiring stable component supply and long-term lifecycle support.
Supply support for AT49F001ANT-55TI 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, nonvolatile memory, and security ICs, with a legacy of high-reliability Flash products for industrial and automotive markets.
The AT49F001A(N)(T) family was designed specifically for in-system reprogrammable firmware storage in 5 V embedded systems, emphasizing boot-code security, low-power standby, and elimination of external high-voltage programming circuitry.
FAQ
What is the boot block address range for AT49F001ANT-55TI?
The AT49F001ANT-55TI has a 16K-byte boot block located at address range 1C000H to 1FFFFH, distinct from the AT49F001A(N) variant which places it at 00000H–03FFFH. This offset enables coexistence with other memory-mapped peripherals in larger 5 V microcontroller systems. The AT49F001ANT-55TI datasheet confirms this mapping in Section 4 and the Command Definitions table.
Does AT49F001ANT-55TI support 12V reset override for boot block reprogramming?
No, the AT49F001ANT-55TI does not support 12V reset override. Per the datasheet Section 3, "RESET feature is not available for the AT49F001AN(T)", and AT49F001ANT-55TI falls under the AN(T) variant group. Only the base AT49F001A(T) supports 12V override on the RESET pin; AT49F001ANT-55TI's RESET pin is functional for standard reset but lacks override capability.
What is the meaning of the 'T' and 'N' suffixes in AT49F001ANT-55TI?
In AT49F001ANT-55TI, 'N' indicates the PLCC/TSOP/VSOP package option (versus 'J' for PLCC-only or 'V' for VSOP-only), and 'T' denotes the TSOP-32 package variant. The full ordering code confirms '32T' packaging. The 'I' suffix specifies industrial temperature range (−40°C to +85°C), and '-55' denotes 55 ns access time. All these are defined in the Ordering Information table on page 14 of the datasheet.
Can AT49F001ANT-55TI be used in a 3.3 V system?
No, AT49F001ANT-55TI is specified for 5 V ±10% operation only. Its DC characteristics (e.g., VIH = 2.0 V min, VIL = 0.8 V max) and internal VCC sense threshold (~3.8 V) are calibrated for 5 V logic levels. Attempting 3.3 V operation risks failure to recognize commands, incomplete programming, or premature write inhibition - the AT49F001ANT-55TI datasheet explicitly states "5-volt Only" in the title and description.
How is the AT49F001ANT-55TI pin 9 (NC) handled in layout?
Per datasheet page 1, pin 9 is designated NC (No Connect) for the AT49F001AN(T) variants, including AT49F001ANT-55TI. It must remain unconnected - neither tied to VCC nor GND - as it is not internally bonded. PCB layout should omit any trace or pad connection to pin 9; leaving it floating avoids unintended coupling or ESD paths that could affect TSOP mechanical reliability or signal integrity.
AT49F001ANT-55TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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-TSOP
AT49F001ANT-55TI FAQ
1.How can I place an order for AT49F001ANT-55TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001ANT-55TI 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-55TI reliable?
The price and inventory of AT49F001ANT-55TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001ANT-55TI is usually 5 days.
3.What payment methods are accepted for AT49F001ANT-55TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001ANT-55TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001ANT-55TI?
AT49F001ANT-55TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001ANT-55TI 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-55TI?
For technical support, including AT49F001ANT-55TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001ANT-55TI requirements.
6.How does Aetrix verify that AT49F001ANT-55TI is sourced from the original manufacturer or authorized distributors?
All AT49F001ANT-55TI 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-55TI meets industry standards.
7.What is the process for return or replacement of AT49F001ANT-55TI?
All AT49F001ANT-55TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001ANT-55TI, 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-55TI part is unused and in its original packaging.
Return procedure for AT49F001ANT-55TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001ANT-55TI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT24C04C-SSHM-T
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