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Microchip Technology AT49F001AN-45TI
- Part No.:
- AT49F001AN-45TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001AN-45TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,540
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Product details
Overview
AT49F001AN-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, and sector-based 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-45TI datasheet, AT49F001AN-45TI pinout, AT49F001AN-45TI application, or AT49F001AN-45TI equivalent, this device serves as a drop-in replacement for legacy EPROM-based boot code storage where 5V-only operation, hardware data protection, DATA polling, and boot-block lockout are required - especially in industrial control, telecom line cards, and legacy BIOS modules.
Technical Context
The AT49F001AN-45TI implements a standard parallel Flash interface with CE/OE/WE control logic and internal command register sequencing for erase and program operations. Its sector architecture enables selective erasure of parameter blocks (8K × 2) and main memory blocks (32K + 64K), while the boot block (16K) supports programmable lockout via six-cycle command sequence.
Hardware data protection includes VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low, CE high, or WE high blocks writes). The RESET pin is NC on this variant, disabling both reset functionality and boot-block override capability - distinguishing it from the T-suffix versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for full boot loader + configuration data in 8-bit microcontroller systems. |
| Read Access Time | 45 ns max - enables direct interfacing with 20 MHz+ 8051 or Z80 derivatives without wait states. |
| Erase Cycle Time | 3 seconds typical for full chip erase - allows field firmware updates within tight maintenance windows. |
| Byte Programming Time | 30 µs typical - supports incremental patching of runtime-modifiable parameters without full sector erase. |
| Operating Voltage | 5.0 V ±10% - eliminates need for charge pumps or dual-voltage rails in legacy 5V designs. |
| Standby Current | 50 µA CMOS - meets low-power requirements for always-on system management controllers. |
| Endurance | 10,000 write/erase cycles - validated for firmware update cycles over 5+ years in industrial deployments. |
| Temperature Range | −40°C to +85°C - qualified for use in uncontrolled industrial enclosures and outdoor telecom cabinets. |
Pinout & Package
AT49F001AN-45TI is supplied in a 32-lead TSOP (Type I, 8 × 20 mm, package code 32T), compliant with JEDEC MO-142 BD. Pin 9 is NC; all other pins match standard parallel Flash pinout.
| 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. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; supports DATA polling on I/O7 and toggle-bit detection on I/O6 during program/erase. |
| CE | Chip Enable | Active-low chip select; must be stable before address setup to meet tCS = 0 ns requirement. |
| OE | Output Enable | Active-low output control; used with CE for bus contention avoidance in shared-memory systems. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing. |
| RESET | No Connect (NC) | Pin 9 is unconnected - disables hardware reset and boot-block override (12V feature absent). |
| VCC / GND | Power Supply | Single 5V supply; decoupling required within 1 cm due to 20 mA active current and fast edge rates. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | Independent erasure of two 8K parameter blocks and two main memory blocks (32K/64K) - enables partial firmware updates without disrupting boot code or calibration tables. |
| Boot Block Lockout | 16K-byte boot sector (address 1C000H–1FFFFH) protected via 6-cycle command; once enabled, contents are permanent under 5.5V - ensures bootloader integrity in unattended systems. |
| DATA Polling & Toggle Bit | I/O7 complement feedback and I/O6 toggling provide real-time, software-driven program/erase completion detection - eliminates need for fixed delay timers in host firmware. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit prevent spurious writes during power transients or EMI events - critical for reliability in factory-floor environments. |
| 5V-Only Operation | No external high-voltage programming supply required; all commands executed using standard 5V logic levels - simplifies PCB design and reduces BOM count. |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot Memory |
|---|---|
|
Use Scenario: Storing boot firmware and field-upgradable protocol stacks in programmable logic controllers deployed in manufacturing cells. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU address space; provides 45 ns read latency for deterministic startup timing. Use Value: Sector architecture allows independent update of communication stack (parameter blocks) without erasing safety-critical boot code (locked boot block). |
Use Scenario: Holding initialization code and DSP configuration data in T1/E1 line interface units operating in central office environments. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced directly to TI C54x DSP's EMIF; supports burst reads during cold start. Use Value: 10,000-cycle endurance and −40°C to +85°C rating ensure reliable operation over 10+ year service life with periodic firmware patches. |
| Legacy BIOS Module | Embedded HMI Configuration Storage |
|
Use Scenario: Replacing UV-erasable EPROM in PC-compatible motherboard BIOS modules requiring field reprogramming. IC Role / Device Role / Timing Role: Drop-in EPROM replacement with identical pinout and CE/OE/WE control; 45 ns access matches original timing budgets. Use Value: Hardware lockout prevents accidental corruption of boot vector table while permitting runtime update of user settings stored in parameter blocks. |
Use Scenario: Storing calibrated touch-screen offsets, language packs, and operator profiles in medical device HMIs with infrequent firmware updates. IC Role / Device Role / Timing Role: Standalone configuration store accessed via 8051 MCU's external memory interface; 50 µA standby current extends battery backup duration. Use Value: Byte-programming (30 µs) enables single-parameter edits without full sector erase - reducing update time and flash wear in low-duty-cycle applications. |
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 | 4 Mbit density, 3V core (5V I/O), 45 ns access, boot-block architecture with reset-pin override. | Higher density and lower voltage operation; requires level-shifting for pure 5V systems. | Select when future-proofing for larger firmware images or migrating toward 3.3V system architecture. |
| MX29LV001CTTI-45G | 1 Mbit, 3V core (5V tolerant), 45 ns, boot-block with software lockout only (no RESET override). | Same density and speed; lacks hardware RESET override but offers better 3V compatibility. | Prefer for mixed-voltage designs where 3.3V I/O margin is needed, and boot-block override is not required. |
Compared with AT49F001AN-45TI, AM29LV001BT-45EI offers higher density and 3V operation but demands voltage translation, while MX29LV001CTTI-45G matches density and speed with improved 3V tolerance but omits hardware reset-based boot override - making AT49F001AN-45TI optimal for cost-sensitive, pure 5V industrial retrofits.
Availability
AT49F001AN-45TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card boot memory, and legacy BIOS modules requiring stable component supply and long-term obsolescence support.
Supply support for AT49F001AN-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.
The AT49F001A(N)(T) series was designed as a 5V-only Flash memory solution for legacy system upgrades, targeting applications needing EPROM drop-in replacement with in-system reprogrammability and robust boot-code protection.
FAQ
What is the boot block address range for AT49F001AN-45TI?
The boot block for AT49F001AN-45TI occupies addresses 1C000H to 1FFFFH (16K bytes). This differs from the base AT49F001A(N) variant, which locates the boot block at 00000H–03FFFH. The upper-address mapping is confirmed in the Command Definitions table and sector address listing for AT49F001A(N)T variants.
Does AT49F001AN-45TI support hardware reset-based boot block override?
No. AT49F001AN-45TI has RESET pin 9 designated as NC (No Connect), explicitly disabling both reset functionality and the 12V boot-block override feature. This is documented in the Pin Configurations note and the RESET section, which states "The RESET feature is not available for the AT49F001AN(T)."
What package type is used for AT49F001AN-45TI?
AT49F001AN-45TI uses the 32-lead TSOP (Thin Small Outline Package), Type I, 8 × 20 mm footprint (JEDEC MO-142 BD), designated as package code 32T. This is specified in the AT49F001AN Ordering Information table and confirmed in the Packaging Information section.
How does DATA polling work on AT49F001AN-45TI?
During byte programming, reading the last written address returns the complement of the loaded data on I/O7. Once programming completes, true data appears on all outputs. This allows host firmware to poll I/O7 without fixed delays - a feature confirmed in the DATA POLLING section and waveforms on page 12 of the datasheet.
Is AT49F001AN-45TI compatible with standard EPROM socket footprints?
AT49F001AN-45TI uses a 32-lead TSOP package, which is physically incompatible with DIP or PLCC EPROM sockets. However, its parallel interface timing (CE/OE/WE control, 45 ns access) and command-set behavior are designed for EPROM-style integration - requiring adapter PCBs or socket-to-TSOP carriers for retrofit use.
AT49F001AN-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
AT49F001AN-45TI FAQ
1.How can I place an order for AT49F001AN-45TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001AN-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 AT49F001AN-45TI reliable?
The price and inventory of AT49F001AN-45TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001AN-45TI is usually 5 days.
3.What payment methods are accepted for AT49F001AN-45TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001AN-45TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001AN-45TI?
AT49F001AN-45TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001AN-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 AT49F001AN-45TI?
For technical support, including AT49F001AN-45TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001AN-45TI requirements.
6.How does Aetrix verify that AT49F001AN-45TI is sourced from the original manufacturer or authorized distributors?
All AT49F001AN-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 AT49F001AN-45TI meets industry standards.
7.What is the process for return or replacement of AT49F001AN-45TI?
All AT49F001AN-45TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001AN-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 AT49F001AN-45TI part is unused and in its original packaging.
Return procedure for AT49F001AN-45TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001AN-45TI Tags
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