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Microchip Technology AT49F001N-12JI
- Part No.:
- AT49F001N-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001N-12JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49F001N-12JI from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 55 ns read access time, supports byte-by-byte programming (10 µs/byte typical), features sector-based erase architecture (including a 16 KB boot block with lockout), and operates across the industrial temperature range (–40°C to +85°C).
For engineers reviewing the AT49F001N-12JI datasheet, AT49F001N-12JI pinout, AT49F001N-12JI application, or AT49F001N-12JI equivalent, key selection considerations include its PLCC-32 industrial-grade packaging, hardware data protection (VCC sense, noise filtering), DATA polling and toggle-bit end-of-program detection, and boot-block lockout override via 12 V on RESET - critical for secure firmware update designs.
Technical Context
This device implements a standard parallel Flash interface with CE/OE/WE control logic, enabling EPROM-like read operation and command-based programming/erasure. Its internal architecture includes dedicated program latches, Y-gating, and input/output buffers, with sector erase support for two 8 KB parameter blocks and two main memory blocks (32 KB and 64 KB).
The AT49F001N-12JI uses Atmel's nonvolatile CMOS process and integrates hardware safeguards: VCC sense inhibits programming below 3.8 V, noise filters reject sub-15 ns pulses on WE/CE, and dual-line control (CE+OE) prevents bus contention during reads. The RESET pin enables system-level reset and - uniquely for the N variant - 12 V override of boot-block lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 1 Mbit (131,072 × 8 bits), organized as 128K words × 8 bits - sufficient for boot code, configuration tables, and firmware patches in resource-constrained MCUs. |
| Read Access Time | 120 ns max (tACC), specified for -12 speed grade - ensures compatibility with 8 MHz bus timing in legacy 8/16-bit microcontrollers. |
| Byte Programming Time | 10 µs typical (tBP), 50 µs max - enables rapid field updates without long write stalls in real-time applications. |
| Erase Cycle Time | 10 seconds max (tEC) for full chip erase - balances speed and reliability for infrequent but critical reprogramming events. |
| Operating Voltage | 5 V ±10% only - eliminates need for charge pumps or dual-voltage rails, simplifying power design versus multi-voltage Flash devices. |
| Temperature Range | Industrial: –40°C to +85°C - qualified for deployment in automotive ECUs, industrial PLCs, and outdoor telecom equipment. |
| Endurance | 10,000 program/erase cycles - supports long-term field maintenance and over-the-air update cycles in deployed systems. |
| Standby Current | 100 µA CMOS (ISB1), 3 mA TTL (ISB2) - enables low-power sleep modes in battery-backed or energy-sensitive applications. |
Pinout & Package
AT49F001N-12JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE. Pin 1 is marked by a corner chamfer; pins are numbered counterclockwise starting from the pin-1 identifier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 map directly to memory locations 0x00000–0x1FFFF. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; true read/write capability with high-impedance tri-state control via CE/OE. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - enables multi-device bus sharing. |
| OE | Output Enable | Active-low output control; decouples outputs from bus when high, preventing contention during writes or standby. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequences - central to all programming/erase operations. |
| RESET | Reset Input | Active-low system reset; at 12 V, overrides boot-block lockout - unique to AT49F001N variants for secure recovery. |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and I/O buffers; VCC sense circuitry disables programming if voltage drops below ~3.8 V. |
| GND | Ground | Reference return path for all signals and power; requires low-impedance connection to minimize noise coupling into sensitive Flash array. |
| NC | No Connect | Pin 1 (PLCC); must remain unconnected - floating or driven signals cause undefined behavior or damage. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16 KB boot block (00000H–03FFFH) supports permanent write-protection after lockout enable - isolates bootloader integrity from application updates. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibition (OE high/CE high/WE high) prevent accidental writes - essential for robust field operation. |
| DATA Polling & Toggle Bit Detection | I/O7 complement and I/O6 toggling provide software-controlled, cycle-accurate program/erase completion signaling - eliminates need for fixed delay loops. |
| 5 V–Only Command Set | All operations (read, program, erase, ID) use standard 5 V levels - avoids external high-voltage generators and simplifies PCB layout and BOM. |
| Industrial Temperature Qualification | Specified and tested from –40°C to +85°C - guarantees reliable operation in extended-environment applications without derating. |
| 10,000 Write/Erase Cycles | Endurance validated across temperature and voltage extremes - supports multi-year field service life with periodic firmware revisions. |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Bootloader Memory |
|---|---|
Use Scenario: Storing and updating ladder logic programs and I/O configuration tables in programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides deterministic 120 ns read access for real-time scan-cycle execution. Use Value: Enables remote firmware upgrades without hardware intervention, while boot-block lockout preserves core runtime integrity against corruption. |
Use Scenario: Hosting secure bootloader code in engine control units requiring certified flash update protocols and anti-rollback protection. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced write protection; RESET-pin 12 V override allows authorized recovery from corrupted boot sectors. Use Value: Meets ISO 26262 ASIL-B requirements for safe boot by preventing unauthorized modification of startup code. |
| Medical Device Configuration Storage | Legacy Industrial HMI Display Firmware |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory audit logs in Class II medical instruments with battery backup. IC Role / Device Role / Timing Role: Low-power (100 µA standby) nonvolatile storage; supports byte-level updates to calibration data without full reflash. Use Value: Ensures data persistence over 10+ years and meets IEC 62304 data retention requirements for safety-critical settings. |
Use Scenario: Storing GUI bitmaps, font assets, and menu logic in human-machine interface panels using 8-bit microcontrollers with parallel address/data buses. IC Role / Device Role / Timing Role: Parallel-interface Flash memory replacing EPROM; 55 ns read timing matches 8051/68HC11 bus cycles. Use Value: Eliminates UV-erasable EPROM sockets and programming fixtures, reducing manufacturing cost and enabling field-upgradable UIs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001MT-120EC | 3 V core with 5 V I/O; 120 ns access; 100 µA standby; no RESET-based boot override. | Requires level-shifting for 5 V-only systems; lacks 12 V recovery path for locked boot sectors. | Select if migrating to lower-power 3 V systems and external high-voltage generation is acceptable. |
| SST39VF010-120-4C-NHE | 3.3 V only; 120 ns access; 30 µA standby; Top/Bottom boot-block configurable via software. | Incompatible with 5 V bus interfaces; boot-block polarity differs and lacks hardware RESET override. | Choose for new 3.3 V designs prioritizing ultra-low standby current and flexible boot-block orientation. |
Compared with AM29LV001MT-120EC and SST39VF010-120-4C-NHE, the AT49F001N-12JI uniquely combines strict 5 V operation, industrial temperature rating, and hardware-enabled boot-block recovery - making it irreplaceable in legacy 5 V embedded systems requiring guaranteed field-recoverability.
Availability
AT49F001N-12JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU bootloader memory, and medical device configuration storage requiring stable component supply across extended product lifecycles.
Supply support for AT49F001N-12JI 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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products, including datasheets, errata, and long-term supply commitments.
The AT49F001N-12JI belongs to Atmel's parallel-interface Flash memory family, designed specifically for in-system reprogrammability in 5 V microcontroller-based systems where EPROM replacement, secure boot, and industrial reliability are mandatory.
FAQ
What is the maximum operating temperature range for the AT49F001N-12JI?
The AT49F001N-12JI is rated for industrial operation from –40°C to +85°C. This specification is verified per the DC and AC operating range table in the official datasheet (Rev. 1008D), and applies to all electrical parameters including read access time (120 ns), active current (50 mA), and standby current (100 µA). The AT49F001N-12JI must not be operated outside this range to ensure compliance with its published timing and endurance specifications.
Does the AT49F001N-12JI support boot-block lockout override, and how is it activated?
Yes, the AT49F001N-12JI supports boot-block lockout override via the RESET pin. When RESET is driven to 12.0 V ± 0.5 V, the protected boot block (00000H–03FFFH) becomes reprogrammable using standard chip or sector erase commands. This feature is explicitly documented for the AT49F001N variant and is absent in AT49F001T/NT versions. After returning RESET to TTL levels, lockout re-engages automatically.
What package type is used for the AT49F001N-12JI, and what are its key mechanical dimensions?
The AT49F001N-12JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package designated 32J, compliant with JEDEC MS-016, Variation AE. Key dimensions include body size 12.47 mm × 14.99 mm (max), lead pitch 1.27 mm, and overall height 3.56 mm (max). Pin 1 is identified by a corner chamfer, and the package is lead-free and RoHS-compliant per Microchip's packaging documentation.
How does the AT49F001N-12JI detect the end of a programming cycle?
The AT49F001N-12JI provides two hardware-supported methods: DATA polling (I/O7 returns complement of loaded data until completion, then true data) and Toggle Bit detection (I/O6 toggles between 0 and 1 during programming and stops upon completion). Both mechanisms are characterized and usable at any point during the cycle, eliminating reliance on fixed timing delays and improving system responsiveness.
Is the AT49F001N-12JI pin-compatible with other members of the AT49F001 family?
Yes, the AT49F001N-12JI shares identical pinout and signal definitions with all AT49F001, AT49F001N, AT49F001T, and AT49F001NT variants in the same package type (e.g., 32J PLCC). Differences lie exclusively in memory organization (boot block address: 00000H–03FFFH for N vs. 1C000H–1FFFFH for T) and RESET functionality (12 V override enabled only on N variants), not pin assignment or electrical interface.
AT49F001N-12JI 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:
- 120 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)
AT49F001N-12JI FAQ
1.How can I place an order for AT49F001N-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-12JI 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 AT49F001N-12JI reliable?
The price and inventory of AT49F001N-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-12JI is usually 5 days.
3.What payment methods are accepted for AT49F001N-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-12JI?
AT49F001N-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-12JI 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 AT49F001N-12JI?
For technical support, including AT49F001N-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-12JI requirements.
6.How does Aetrix verify that AT49F001N-12JI is sourced from the original manufacturer or authorized distributors?
All AT49F001N-12JI 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 AT49F001N-12JI meets industry standards.
7.What is the process for return or replacement of AT49F001N-12JI?
All AT49F001N-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-12JI, 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 AT49F001N-12JI part is unused and in its original packaging.
Return procedure for AT49F001N-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001N-12JI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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