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Microchip Technology AT49F001AT-45TI
- Part No.:
- AT49F001AT-45TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001AT-45TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,607
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Product details
Overview
AT49F001AT-45TI 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, byte programming at 30 µs/byte, and hardware data protection including VCC sense and noise filtering. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F001AT-45TI datasheet, AT49F001AT-45TI pinout, AT49F001AT-45TI application, or AT49F001AT-45TI equivalent, key selection considerations include boot block lockout behavior (1C000H–1FFFFH), sector architecture (16K boot + two 8K parameter + 32K/64K main blocks), 50 µA CMOS standby current, RESET pin functionality for boot override (12V), and TSOP-32 package compatibility with industrial temperature range (−40°C to +85°C).
Technical Context
The AT49F001AT-45TI implements a command-based architecture using standard CE/OE/WE control lines and supports hardware reset-driven boot block reprogramming via 12V on RESET - a feature absent in AN(T) variants. Its internal program control logic manages erase timing autonomously without external clocks.
Memory organization is split into five sectors: one 16K-byte boot block (1C000H–1FFFFH), two 8K-byte parameter blocks (1A000H–1BFFFH and 18000H–19FFFH), and two main memory blocks (10000H–17FFFH and 00000H–0FFFFH), enabling selective erasure and byte-level programming after full or sector erase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for firmware images or configuration tables in resource-constrained controllers. |
| 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 firmware updates during manufacturing or field service. |
| Byte Programming Time | 30 µs typical - allows efficient patching of individual parameters or calibration data without full reflash. |
| Standby Current | 50 µA CMOS - critical for battery-backed or low-power sleep modes in portable or remote devices. |
| Operating Voltage | 5.0 V ±10% - eliminates need for dedicated programming voltage rails; compatible with legacy 5V logic interfaces. |
| Temperature Range | −40°C to +85°C industrial grade - validated for deployment in automotive body control modules and industrial PLCs. |
Pinout & Package
AT49F001AT-45TI 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 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, enabling aliasing (e.g., AAA → 2AA). |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; dual-line control prevents bus contention. |
| OE | Output Enable | Active-low output gate; high-Z state when asserted high, allowing shared data bus operation with other peripherals. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing (e.g., byte program = 4-cycle). |
| RESET | Reset Input | Logic-high = normal operation; low = high-Z outputs; 12V pulse enables boot block override - unique to AT/ANT variants. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; supports DATA polling (I/O7 complement) and toggle bit detection (I/O6 toggling) for end-of-program/erase signaling. |
| VCC | Power Supply | +5.0 V supply; internal VCC sense disables programming if voltage drops below 3.8 V (typical). |
| GND | Ground Reference | Signal and power ground; pin 20 in TSOP layout - critical return path for active current (20 mA) and standby leakage (50 µA). |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte region (1C000H–1FFFFH) permanently protected after command sequence; prevents accidental overwrite of bootloader code. |
| Hardware Boot Override | 12V applied to RESET pin unlocks boot block for chip/sector erase or byte programming - enables secure recovery without external HV programmers. |
| Sector-Erasable Architecture | Five independent sectors (boot + 2×parameter + 2×main) allow granular updates - e.g., retain calibration data while refreshing application firmware. |
| DATA Polling & Toggle Bit | Dual software-detectable completion methods: I/O7 complement indicates program finish; I/O6 toggling signals ongoing erase/program - no timer polling required. |
| Hardware Data Protection | Triple-layer safeguard: VCC sense (<3.8 V inhibits write), control-line inhibition (OE high/CE high/WE high blocks programming), and 15 ns noise filter on WE/CE inputs. |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing ladder logic programs and I/O mapping tables in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; 45 ns access supports real-time scan cycle execution without CPU wait states. Use Value: Enables remote firmware updates over Modbus RTU without controller replacement; boot lockout ensures bootloader integrity during field upgrades. |
Use Scenario: Holding door lock actuation logic, window lift profiles, and lighting control algorithms in vehicle body domain controllers. IC Role / Device Role / Timing Role: Primary firmware repository interfaced directly to 8-bit microcontroller address/data bus; RESET-driven boot override supports dealer-level recalibration. Use Value: 50 µA standby current extends battery life during vehicle sleep mode; sector erase permits updating lighting firmware without resetting door lock settings. |
| Medical Device Configuration Memory | Networking Equipment Bootloader |
Use Scenario: Retaining calibration coefficients, user preferences, and safety-critical operational limits in portable diagnostic instruments. IC Role / Device Role / Timing Role: Parameter storage with hardware write protection; 3-second erase allows rapid recalibration between patient sessions. Use Value: Boot block lockout prevents corruption of FDA-mandated safety routines; DATA polling ensures deterministic update completion for audit logging. |
Use Scenario: Hosting primary bootloader code that initializes Ethernet PHY, loads FPGA bitstreams, and validates application image signatures in managed switches. IC Role / Device Role / Timing Role: Secure boot memory with 12V RESET override - used during RMA to recover bricked units without JTAG debuggers. Use Value: 10,000 write cycles exceed lifetime requirements for infrequent firmware patches; TSOP-32 footprint simplifies PCB layout in space-constrained switch modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002AT-45TI | 2 Mbit density (256K × 8), same 45 ns access, identical TSOP-32 package and command set. | Supports larger firmware images; requires no PCB change but doubles memory cost and power during active erase/program. | Select when future firmware growth exceeds 1 Mbit; verify bootloader compatibility with extended address range (A17 added). |
| MX29LV001CTTI-45G | 1 Mbit, 3.0 V core (5 V tolerant I/O), 45 ns access, PLCC-32 only - no TSOP option; lacks RESET-based boot override. | Lower active power (15 mA vs. 20 mA); suited for mixed-voltage designs but incompatible pinout and missing 12V boot recovery. | Choose for 3.3 V system integration where boot override is unnecessary; requires PCB redesign due to PLCC vs. TSOP footprint mismatch. |
Compared with AT49F002AT-45TI, the AT49F001AT-45TI offers optimal cost and power for fixed-size firmware, while MX29LV001CTTI-45G trades boot security and package compatibility for lower voltage operation - making AT49F001AT-45TI the preferred choice for 5V industrial systems requiring field-recoverable boot code.
Availability
AT49F001AT-45TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, and medical device configuration memory requiring stable component supply across long production lifecycles.
Supply support for AT49F001AT-45TI 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 secure authentication ICs for industrial, automotive, and consumer applications.
The AT49F001A(T) series was designed as a drop-in EPROM replacement offering in-system reprogrammability for legacy 5V embedded systems - prioritizing command compatibility, industrial temperature resilience, and hardware-protected boot code integrity.
FAQ
What is the boot block address range for AT49F001AT-45TI?
The boot block for AT49F001AT-45TI occupies addresses 1C000H to 1FFFFH (16K bytes), distinct from the AT49F001A(N) variant's 00000H–03FFFH range. This relocation isolates bootloader code in upper memory, reducing collision risk with application firmware stored in lower blocks. The AT49F001AT-45TI datasheet confirms this mapping in Section 4 and the Command Definitions table.
Does AT49F001AT-45TI support 12V programming on the RESET pin?
Yes, AT49F001AT-45TI supports 12V ±0.5V applied to the RESET pin to override boot block programming lockout - enabling chip erase, sector erase, or byte programming of the protected 16K-byte region. This feature is explicitly documented in the "BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE" section and is unavailable on AT49F001AN(T) variants.
What package type does AT49F001AT-45TI use?
AT49F001AT-45TI uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 × 20 mm), designated as package code 32T per Atmel's ordering information table. Pin 9 is NC (no connect), and mechanical dimensions comply with JEDEC MO-142 Variation BD - confirmed in the "Packaging Information" section (page 16).
How many write/erase cycles is AT49F001AT-45TI rated for?
AT49F001AT-45TI is rated for a typical 10,000 write/erase cycles, as stated in the "Features" section and verified in the "Device Operation" description. This endurance applies to all sectors (boot, parameter, and main memory blocks) and is measured under standard industrial conditions (−40°C to +85°C, VCC = 5.0 V ±10%).
Can AT49F001AT-45TI be used in place of AT49F001A-45TI?
No - AT49F001AT-45TI and AT49F001A-45TI differ in boot block location (1C000H–1FFFFH vs. 00000H–03FFFH) and RESET pin functionality (12V override enabled vs. not available). Software relying on boot block address or 12V recovery will fail. They share pinout and command set but are not functionally interchangeable without firmware and system-level validation.
AT49F001AT-45TI 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:
- 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-TSOP
AT49F001AT-45TI FAQ
1.How can I place an order for AT49F001AT-45TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001AT-45TI 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-45TI reliable?
The price and inventory of AT49F001AT-45TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001AT-45TI is usually 5 days.
3.What payment methods are accepted for AT49F001AT-45TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001AT-45TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001AT-45TI?
AT49F001AT-45TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001AT-45TI 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-45TI?
For technical support, including AT49F001AT-45TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001AT-45TI requirements.
6.How does Aetrix verify that AT49F001AT-45TI is sourced from the original manufacturer or authorized distributors?
All AT49F001AT-45TI 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-45TI meets industry standards.
7.What is the process for return or replacement of AT49F001AT-45TI?
All AT49F001AT-45TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001AT-45TI, 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-45TI part is unused and in its original packaging.
Return procedure for AT49F001AT-45TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001AT-45TI Tags
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