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Microchip Technology AT49F001NT-12JI
- Part No.:
- AT49F001NT-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001NT-12JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,882
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Product details
Overview
AT49F001NT-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 features 55 ns read access time, 10 µs/byte typical programming, 10-second chip erase, hardware data protection, and sector architecture with 16KB boot block, two 8KB parameter blocks, and two main memory blocks (32KB + 64KB).
For engineers reviewing the AT49F001NT-12JI datasheet, AT49F001NT-12JI pinout, AT49F001NT-12JI application, or AT49F001NT-12JI equivalent, key selection considerations include industrial temperature range (–40°C to +85°C), PLCC-32 package compatibility, boot block lockout functionality, DATA polling/Toggle Bit end-of-program detection, and 5V-only command interface without high-voltage programming.
Technical Context
The AT49F001NT-12JI implements a standard parallel Flash architecture with CE/OE/WE control logic, supporting EPROM-like read timing and software-commanded erase/program cycles. Its sector-based organization enables selective erasure of parameter blocks (8KB each) and main memory blocks (32KB and 64KB), while the boot block (16KB, address range 1C000H–1FFFFH) supports optional reprogramming lockout via six-byte command sequence.
Internal program control includes automatic pulse generation, VCC sense (inhibit below 3.8V), noise filtering (<15 ns pulses ignored), and dual end-of-operation detection: DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling). The RESET pin is DC-only on this variant and does not support 12V override for boot block reprogramming.
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 buses with byte-wide access. |
| Read Access Time | 120 ns max (tACC) - compatible with 8 MHz system clocks and legacy 8051/68K-based designs requiring fast instruction fetch. |
| Byte Programming Time | 10 µs typical (tBP) - enables rapid field updates of configuration parameters without interrupting real-time operation. |
| Chip Erase Time | 10 seconds max (tEC) - allows full firmware replacement during maintenance windows without external high-voltage programmers. |
| Operating Voltage | 5.0 V ±10% - eliminates need for dedicated 12V programming supplies; integrates cleanly into 5V logic systems. |
| Temperature Range | –40°C to +85°C (Industrial) - qualified for use in industrial controllers, motor drives, and outdoor telemetry equipment. |
| Standby Current | 300 µA max (ISB1) - supports low-power sleep modes in battery-backed applications like smart meters. |
Pinout & Package
AT49F001NT-12JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE, with lead pitch 1.27 mm, body size 12.45 × 14.95 mm, and pin 1 identifier at corner with 45° chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 required for accessing upper 64KB block (10000H–1FFFFH). |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; supports true read/write data transfer without external transceivers. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables bus sharing in multi-device systems. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during shared-memory access or partial decoding. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle; controls all program/erase operations. |
| RESET | Reset Input | DC-only input (no 12V override); forces outputs to high-impedance and halts ongoing operations; returns device to read/standby mode on high-to-low transition. |
| VCC | Power Supply | +5V ±10% supply; powers internal charge pumps and logic; requires local 0.1 µF ceramic decoupling. |
| GND | Ground Reference | Signal and power ground reference; must be low-inductance connection to minimize noise coupling during programming. |
| NC | No Connect | Pin 1 (PLCC top view) is unconnected; must remain floating - no pull-up/down or routing allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables secure firmware boot code storage (16KB at 1C000H–1FFFFH) that remains immutable after lockout activation, preventing accidental corruption during field updates. |
| DATA Polling & Toggle Bit Detection | Allows host processor to poll I/O7 or monitor I/O6 without timers or external status lines - reduces software overhead and eliminates need for fixed delay loops during programming. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit (OE high / CE high / WE high) prevent spurious writes due to power glitches or EMI, improving field reliability. |
| 5V-Only Reprogramming | Eliminates requirement for 12V programming voltage; simplifies PCB design, reduces BOM count, and avoids high-voltage safety compliance issues. |
| 10,000 Program/Erase Cycles | Supports long-term field serviceability - sufficient for >5 years of daily configuration updates in industrial HMI or PLC modules. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast read access for instruction fetch and sector-erasable parameter storage for runtime configuration. Use Value: Boot block lockout ensures bootloader integrity across firmware upgrades; 120 ns tACC meets timing budgets of 8 MHz 8051-based control CPUs. | Use Scenario: Retaining calibration data, user preferences, and diagnostic logs in portable ultrasound and infusion pump systems. IC Role / Device Role / Timing Role: Parameter block (8KB ×2) stores calibrated sensor offsets and audit trails; main memory blocks hold firmware patches. Use Value: 300 µA standby current extends battery life in battery-backed operation; DATA polling enables deterministic update completion without watchdog resets. |
| Telecom Line Card Bootloader | Automotive Body Control Module EEPROM Replacement |
Use Scenario: Hosting secure boot code and field-upgradable protocol stacks in carrier-grade DSLAM and ONU line cards. IC Role / Device Role / Timing Role: Boot block (16KB) stores signed bootloader; parameter blocks store MAC addresses and provisioning keys. Use Value: Industrial temperature rating ensures reliability in uncooled telecom cabinets; sector erase allows independent update of protocol stack without touching bootloader. | Use Scenario: Replacing serial EEPROM in automotive BCMs for storing window position limits, mirror presets, and seat memory profiles. IC Role / Device Role / Timing Role: Parallel interface provides faster write throughput than I²C/SPI EEPROMs; boot block protects critical safety initialization code. Use Value: 10 µs/byte programming enables sub-100ms profile saves; hardware write protection prevents corruption during vehicle battery transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F001N-12JI | Same density, timing, and package; boot block address range is 00000H–03FFFH (lower memory map) instead of 1C000H–1FFFFH. | Requires PCB-level address decoding changes to accommodate lower boot block location; unsuitable for systems relying on upper 16KB for boot code. | Select only if legacy design uses lower-address boot region and no migration to AT49F001NT-12JI's relocated boot block is feasible. |
| SST39VF010-70-4C-NHE | 5V-only 1 Mbit Flash; 70 ns access; 32-pin TSOP; lacks boot block lockout and RESET pin; uses different command set (SST proprietary). | No hardware-protected boot sector; requires software-managed write protection; incompatible command sequences prevent drop-in replacement. | Choose when TSOP footprint is preferred and boot security is managed in firmware; verify command translation layer compatibility before integration. |
Compared with AT49F001N-12JI, the AT49F001NT-12JI relocates the boot block to upper memory for improved memory layout flexibility, while SST39VF010 offers faster access but sacrifices hardware lockout and requires redesign of programming firmware.
Availability
AT49F001NT-12JI is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, telecom infrastructure, and automotive body electronics requiring stable component supply across extended product lifecycles.
Supply support for AT49F001NT-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 the AT49F series.
The AT49F001 family was designed for cost-sensitive, 5V-based embedded systems needing reliable in-system reprogrammability without high-voltage programming circuitry.
FAQ
What is the boot block address range for AT49F001NT-12JI?
The AT49F001NT-12JI boot block occupies address range 1C000H to 1FFFFH (16 KB), distinct from the AT49F001N variant's 00000H–03FFFH range. This upper-memory placement avoids conflict with typical reset vector locations in 8051 and 68K architectures and enables cleaner separation of bootloader and application code. The AT49F001NT-12JI datasheet confirms this mapping in Section 6, "Notes".
Does AT49F001NT-12JI support 12V RESET override for boot block reprogramming?
No, AT49F001NT-12JI does not support 12V RESET override. The datasheet explicitly states "The RESET feature is not available for the AT49F001N(T)" and notes that the RESET pin is DC-only on this variant. Boot block reprogramming after lockout activation is permanently disabled unless the device is replaced. This differs from earlier AT49F001T versions which supported 12V override.
What package type is used by AT49F001NT-12JI?
AT49F001NT-12JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J per Atmel's ordering information table. The package conforms to JEDEC MS-016, Variation AE, with dimensions 12.45 mm × 14.95 mm and 1.27 mm lead pitch. Pin 1 is identified by a corner chamfer, and pin 1 is NC (no connect).
How is end-of-program detection implemented in AT49F001NT-12JI?
AT49F001NT-12JI supports two hardware-assisted end-of-program detection methods: DATA polling (monitoring I/O7 for complemented data) and Toggle Bit (observing I/O6 toggling state). Both methods allow the host processor to detect completion without fixed delays or external status lines. The AT49F001NT-12JI datasheet specifies these in Sections 5 and 12, with tDH = 10 ns minimum hold time.
What is the maximum erase cycle time for AT49F001NT-12JI?
The maximum chip erase cycle time for AT49F001NT-12JI is 10 seconds (tEC), as specified in the "Program Cycle Characteristics" table (Section 11). Sector erase times are not individually specified but fall within the same 10-second maximum bound. This value is guaranteed across the industrial temperature range (–40°C to +85°C) and applies whether erasing the full chip or individual sectors.
AT49F001NT-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)
AT49F001NT-12JI FAQ
1.How can I place an order for AT49F001NT-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001NT-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 AT49F001NT-12JI reliable?
The price and inventory of AT49F001NT-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001NT-12JI is usually 5 days.
3.What payment methods are accepted for AT49F001NT-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001NT-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001NT-12JI?
AT49F001NT-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001NT-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 AT49F001NT-12JI?
For technical support, including AT49F001NT-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001NT-12JI requirements.
6.How does Aetrix verify that AT49F001NT-12JI is sourced from the original manufacturer or authorized distributors?
All AT49F001NT-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 AT49F001NT-12JI meets industry standards.
7.What is the process for return or replacement of AT49F001NT-12JI?
All AT49F001NT-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001NT-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 AT49F001NT-12JI part is unused and in its original packaging.
Return procedure for AT49F001NT-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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