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Microchip Technology AT49F001AN-45JI
- Part No.:
- AT49F001AN-45JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001AN-45JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49F001AN-45JI from Atmel is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory with 45 ns read access time, 30 µs typical byte programming time, and sector-based architecture including one 16K-byte boot block with programmable lockout-used for secure firmware storage in industrial microcontroller boot loaders.
For engineers reviewing the AT49F001AN-45JI datasheet, AT49F001AN-45JI pinout, AT49F001AN-45JI application, or AT49F001AN-45JI equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative parts for embedded firmware storage design and legacy system replacement.
Technical Context
The AT49F001AN-45JI implements a CMOS-based Flash memory architecture with internal program control logic and hardware data protection, supporting standard EPROM-like read timing (CE/OE/WE control) and software command sequences for sector erase, chip erase, and byte programming. Its boot block lockout feature is enabled via six-cycle command sequence and permanently disables reprogramming of the 16K-byte boot sector at ≤5.5 V.
It features DATA polling (I/O7 complement detection) and Toggle Bit (I/O6 toggling) for end-of-program/erase cycle detection, operates across –40°C to +85°C, and uses 5V ±10% supply with 20 mA active current and 50 µA CMOS standby current-enabling low-power embedded firmware updates without high-voltage programming circuitry.
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/16-bit MCUs. |
| Read Access Time | 45 ns max-enables direct execution from Flash (XIP) in timing-critical boot code paths. |
| Byte Programming Time | 30 µs typical-allows rapid field firmware patching without external high-voltage generators. |
| Erase Cycle Time | 3 seconds max for full chip erase-supports fast in-system reconfiguration during production or service. |
| Operating Voltage | 5V ±10% only-eliminates need for dual-voltage regulators or charge pumps in legacy 5V systems. |
| Temperature Range | –40°C to +85°C industrial grade-qualified for deployment in industrial controllers and telecom line cards. |
| Boot Block Size | 16K bytes (00000H–03FFFH)-dedicated secure region for bootloader code, protected by lockout command. |
Pinout & Package
AT49F001AN-45JI is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package (JEDEC MS-016, Variation AE), with pin 1 marked by corner notch and lead coplanarity ≤0.102 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; must be low with OE low and WE high for valid read access-prevents bus contention. |
| OE | Output Enable | Active-low output control; used with CE to gate data outputs-enables shared-bus operation with other peripherals. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle-controls all programming/erase operations. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read data output and program data input-compatible with standard microprocessor data buses. |
| RESET | Reset Input | Active-low reset; halts ongoing program/erase and forces high-Z outputs-note: boot block override via 12V on RESET is disabled in AT49F001AN(T) variants. |
| NC | No Connect | Pin 1 (PLCC) is NC-must be left unconnected; no internal bonding or function. |
| VCC | Power Supply | +5V ±10% main supply-powers core logic and I/O buffers; requires local 0.1 µF decoupling. |
| GND | Ground | Signal and power reference-must be connected to system ground plane with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | One 16K-byte boot block + two 8K-byte parameter blocks + two main memory blocks (32K/64K bytes)-enables granular firmware updates without erasing critical bootloader. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filter (rejects <15 ns pulses), and control-line inhibit (OE low/CE high/WE high blocks writes)-prevents accidental corruption during power transients. |
| Boot Block Lockout | Software-enabled permanent write protection for boot sector (00000H–03FFFH) at ≤5.5V-ensures bootloader integrity in deployed systems. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling)-eliminates need for fixed delay timers in firmware drivers. |
| Low-Power Standby | 50 µA CMOS standby current-reduces quiescent power in always-on embedded systems with infrequent firmware updates. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot Loader |
|---|---|
Use Scenario: Storing and updating firmware images in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile program memory providing XIP-capable boot code and field-upgradable application firmware with hardware write protection. Use Value: 45 ns read access enables deterministic boot timing; 16K boot block lockout prevents corruption of safety-critical startup routines during remote updates. |
Use Scenario: Hosting boot code for 8051- or Z80-based embedded systems where firmware must survive power loss and support in-system reprogramming. IC Role / Device Role / Timing Role: Primary Flash memory mapped into CPU address space, accessed via standard CE/OE/WE control lines identical to EPROM interfaces. Use Value: 5V-only operation eliminates level-shifting; sector erase allows patching of application sections without disturbing bootloader stored in protected 16K boot block. |
| Telecom Line Card Configuration | Automotive Diagnostic Module Memory |
Use Scenario: Storing configuration tables, calibration data, and protocol stacks in telecom line cards requiring long-term data retention and occasional field updates. IC Role / Device Role / Timing Role: Parameter memory holding nonvolatile settings and firmware patches, accessed via microcontroller's parallel bus during initialization or maintenance mode. Use Value: Two independent 8K parameter blocks allow A/B configuration swapping; 3-second chip erase enables rapid recovery from corrupted settings. |
Use Scenario: Retaining diagnostic firmware and vehicle-specific calibration data in OBD-II modules subjected to automotive temperature cycling and vibration. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory supporting dealer-level firmware updates via CAN-connected tools without component replacement. Use Value: Industrial temperature rating (–40°C to +85°C) ensures reliability under hood conditions; hardware data protection prevents corruption during ignition transients. |
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 | 3V core with 5V I/O tolerant; 45 ns access; 1 Mbit (128K × 8); supports CFI query; no dedicated boot block lockout. | Requires 3V supply rail; lacks hardware-enforced boot sector protection-relies on software locks or external logic. | Choose when migrating to lower-voltage systems and CFI compatibility is required; verify bootloader protection scheme separately. |
| MX29LV001CTTI-45G | 3V-only operation; 45 ns access; 1 Mbit (128K × 8); top-boot sector (16K); supports JEDEC-standard commands. | Not 5V-compatible; requires level translation in legacy 5V designs; boot sector location differs (top vs. bottom). | Prefer for new 3V designs needing JEDEC compliance; avoid in existing 5V systems without voltage translation. |
Compared with AM29LV001MT-45EI and MX29LV001CTTI-45G, the AT49F001AN-45JI uniquely delivers true 5V-only operation with hardware-enforced boot block lockout-making it irreplaceable in legacy industrial systems where voltage simplification and guaranteed bootloader integrity are mandatory.
Availability
AT49F001AN-45JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot loader replacement, telecom line card configuration, and automotive diagnostic module memory requiring stable component supply over extended product lifecycles.
Supply support for AT49F001AN-45JI 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, with a legacy of robust industrial-grade nonvolatile memory solutions.
The AT49F001A(N)(T) family was designed specifically for 5V embedded systems requiring in-system reprogrammability, deterministic boot timing, and hardware-protected firmware storage-targeting industrial control, telecom infrastructure, and automotive diagnostics.
FAQ
What is the boot block address range for AT49F001AN-45JI?
The AT49F001AN-45JI uses the standard AT49F001AN boot block address range of 00000H to 03FFFH (16K bytes). This bottom-sector layout is fixed for the "N" variant and differs from the "T" variant's top-sector (1C000H–1FFFFH) mapping. The boot block lockout feature applies exclusively to this range once enabled via the six-cycle command sequence.
Does AT49F001AN-45JI support 12V RESET override for boot block reprogramming?
No, AT49F001AN-45JI does not support 12V RESET override. The datasheet explicitly states that the RESET pin boot block programming lockout override feature is unavailable for AT49F001AN(T) variants. Once the boot block lockout is enabled on AT49F001AN-45JI, the 16K-byte region cannot be erased or programmed at any voltage ≤5.5V, and no hardware override exists.
What package type is used for AT49F001AN-45JI?
AT49F001AN-45JI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), designated as package code "32J". It conforms to JEDEC MS-016, Variation AE, with dimensions 12.319–12.573 mm × 14.859–15.113 mm and pin 1 identified by a corner notch. Pin 1 is a no-connect (NC) terminal and must remain unconnected.
How is end-of-program detection implemented in AT49F001AN-45JI?
AT49F001AN-45JI provides two hardware-supported end-of-program detection methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming and stabilizes upon completion). Both methods eliminate reliance on fixed timing delays and enable efficient polling-based firmware drivers.
What is the maximum number of program/erase cycles guaranteed for AT49F001AN-45JI?
The AT49F001AN-45JI is rated for a typical 10,000 write/erase cycles per memory location. This endurance specification applies to all sectors-including the boot block, parameter blocks, and main memory blocks-and is validated across the full industrial temperature range (–40°C to +85°C) under specified 5V ±10% supply conditions.
AT49F001AN-45JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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-PLCC (13.97x11.43)
AT49F001AN-45JI FAQ
1.How can I place an order for AT49F001AN-45JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001AN-45JI 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-45JI reliable?
The price and inventory of AT49F001AN-45JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001AN-45JI is usually 5 days.
3.What payment methods are accepted for AT49F001AN-45JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001AN-45JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001AN-45JI?
AT49F001AN-45JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001AN-45JI 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-45JI?
For technical support, including AT49F001AN-45JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001AN-45JI requirements.
6.How does Aetrix verify that AT49F001AN-45JI is sourced from the original manufacturer or authorized distributors?
All AT49F001AN-45JI 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-45JI meets industry standards.
7.What is the process for return or replacement of AT49F001AN-45JI?
All AT49F001AN-45JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001AN-45JI, 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-45JI part is unused and in its original packaging.
Return procedure for AT49F001AN-45JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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