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Microchip Technology AT49F001N-70JI
- Part No.:
- AT49F001N-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001N-70JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,140
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Product details
Overview
AT49F001N-70JI 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 typical byte programming, 10-second chip erase, hardware data protection, and sector-based architecture with a 16 KB boot block supporting programming lockout.
For engineers reviewing the AT49F001N-70JI datasheet, AT49F001N-70JI pinout, AT49F001N-70JI application, or AT49F001N-70JI equivalent, key selection considerations include industrial temperature operation (−40°C to +85°C), PLCC-32 package compatibility, 5V single-supply reprogramming, boot-sector write protection, and DATA polling/Toggle Bit end-of-program detection.
Technical Context
The AT49F001N-70JI implements a command-based software-controlled architecture for read, byte program, sector erase, and chip erase operations using standard microprocessor timing with CE/OE/WE control lines. Its internal logic handles erase timing autonomously without external clocks, and supports both hardware and software product identification modes.
It uses a sector-organized memory map: one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB). The RESET pin enables system-level reset and - on non-N(T) variants - 12 V override of boot block lockout, though this feature is explicitly disabled on the AT49F001N-70JI per datasheet Note * and Section 3.
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 | 70 ns maximum - meets timing requirements for 14 MHz bus interfaces in industrial microcontroller applications. |
| Byte Programming Time | 10 µs typical - enables fast field updates of small data segments without full-block erasure overhead. |
| Erase Cycle Time | 10 seconds max for full chip erase - deterministic internal timing eliminates need for external erase controllers. |
| Operating Voltage | 5.0 V ±10% - compatible with legacy 5V logic families and eliminates need for dual-supply voltage translation. |
| Temperature Range | −40°C to +85°C - qualified for industrial environments including factory automation and motor control systems. |
| Standby Current | 300 µA max - reduces power consumption during idle periods in battery-backed or energy-sensitive systems. |
Pinout & Package
AT49F001N-70JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package, JEDEC MS-016 compliant, with pin 1 identifier at corner and body dimensions 12.47 mm × 14.99 mm × 3.35 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 directly map to memory locations 00000H–1FFFFH. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read data output and program data input; high-impedance when CE or OE is inactive. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; inhibits programming if held high. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention; high disables outputs to high-Z state. |
| WE | Write Enable | Active-low write strobe; initiates command latching and byte programming; held high to inhibit all write/erase functions. |
| RESET | Reset Input | Active-low system reset; halts ongoing operations and forces outputs to high-Z; no 12 V override capability on AT49F001N-70JI. |
| VCC | Power Supply | +5 V supply pin; internal voltage sensing disables programming if VCC drops below ~3.8 V. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal circuitry. |
| NC | No Connect | Pin 1 on PLCC package is NC - must remain unconnected per datasheet Note * and ordering table. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables secure firmware storage: 16 KB boot block (00000H–03FFFH) can be permanently write-protected via command sequence, preventing accidental corruption of startup code. |
| DATA Polling & Toggle Bit Detection | Eliminates need for fixed delay timers during programming/erasing: I/O7 complement or I/O6 toggling provides real-time status feedback for precise cycle management. |
| Hardware Data Protection | Three-layer safeguard: VCC sense (<3.8 V inhibits programming), control-line inhibition (OE low / CE high / WE high blocks writes), and noise filtering (<15 ns pulses ignored). |
| 5V-Only Reprogrammability | Removes requirement for 12 V programming supplies or external high-voltage generators - simplifies board design and reduces BOM cost. |
| Industrial Temperature Rating | Qualified from −40°C to +85°C with guaranteed 70 ns read timing and 300 µA standby current - suitable for under-hood automotive modules and industrial PLCs. |
Applications
| Industrial HMI Firmware Storage | Legacy PLC Configuration Memory |
|---|---|
Use Scenario: Storing boot code and UI assets in panel-mounted HMIs operating in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing 70 ns read access to support real-time display refresh and button response latency. Use Value: Boot block lockout prevents unauthorized modification of bootloader, while sector erase allows safe field updates of application firmware without risking core system integrity. |
Use Scenario: Retaining ladder logic configuration and I/O mapping data in programmable logic controllers deployed in manufacturing lines. IC Role / Device Role / Timing Role: Field-upgradable data storage device interfacing directly to 8-bit microcontrollers via standard parallel bus. Use Value: 10 µs byte programming enables rapid parameter adjustment during commissioning; 10,000 write cycles ensure longevity across decades of maintenance cycles. |
| Embedded Network Gateway Bootloader | Medical Device Calibration Data Storage |
Use Scenario: Hosting secure bootloader in Ethernet/Wi-Fi gateways that require authenticated firmware updates over network links. IC Role / Device Role / Timing Role: Trusted code execution anchor with hardware-enforced write protection for first-stage boot code. Use Value: RESET pin integration allows clean recovery from failed update attempts; 5V-only operation avoids complexity of level-shifting in mixed-voltage designs. |
Use Scenario: Storing calibrated sensor offsets and gain coefficients in portable diagnostic equipment requiring traceable, tamper-resistant settings. IC Role / Device Role / Timing Role: High-reliability nonvolatile memory with guaranteed 10,000 write endurance and industrial-grade retention. Use Value: Hardware data protection prevents corruption during power brownouts; sector architecture isolates calibration data from application logs to minimize erase wear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001BT-70EC | 3.3 V core with 5 V tolerant I/O; 70 ns read; 1 Mbit; TSOP-32 package only - no PLCC option. | Requires level-shifting or dual-supply design; lacks boot block lockout command set; uses different command sequences. | Select only if migrating to 3.3 V systems and redesigning PCB layout to accommodate TSOP footprint. |
| SST39VF010-70-4C-NHE | 3.3 V operation; 70 ns read; 1 Mbit; PLCC-32 available; supports both Top and Bottom boot sectors. | Lower VCC increases risk of noise-induced errors in noisy industrial environments; no 12 V RESET override but offers flexible boot sector placement. | Prefer for new 3.3 V designs where power efficiency outweighs industrial temperature margin and 5 V compatibility. |
Compared with AM29LV001BT-70EC and SST39VF010-70-4C-NHE, the AT49F001N-70JI delivers native 5 V operation, guaranteed industrial temperature performance, and a dedicated 16 KB boot block with explicit lockout - making it uniquely suited for legacy 5 V controller upgrades where pinout and voltage compatibility are mandatory.
Availability
AT49F001N-70JI is available at Aetrix Electronics and suitable for industrial HMI firmware storage, legacy PLC configuration memory, and embedded network gateway bootloader applications requiring stable component supply, long-term lifecycle support, and consistent PLCC-32 packaging.
Supply support for AT49F001N-70JI 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 the AT49F001 family, including datasheets, application notes, and legacy product change notifications.
The AT49F001N series belongs to Atmel's early-generation 5 V Flash memory product line, designed specifically for drop-in replacement of EPROMs in industrial and automotive control systems requiring in-system reprogrammability without high-voltage programming circuits.
FAQ
What is the memory organization of the AT49F001N-70JI?
The AT49F001N-70JI contains 1 Mbit (131,072 × 8) of Flash memory organized as 128K words by 8 bits. Its physical address space spans 00000H to 1FFFFH, partitioned into a 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB). This structure is fixed and documented in the AT49F001N-70JI datasheet Figure 2 and Section 6.
Does the AT49F001N-70JI support 12 V RESET override for boot block reprogramming?
No. The AT49F001N-70JI explicitly does not support 12 V RESET override. Datasheet Note * on page 2 and Section 3 state: "The RESET feature is not available for the AT49F001N(T)" - and the "N" suffix in AT49F001N-70JI confirms it belongs to the N(T) variant group. Therefore, once boot block lockout is enabled on the AT49F001N-70JI, the boot sector becomes permanently protected under all voltage conditions ≤5.5 V, with no hardware override path.
What package type is used for the AT49F001N-70JI?
The AT49F001N-70JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J in Atmel/Microchip ordering nomenclature. Its mechanical drawing conforms to JEDEC MS-016, Variation AE, with body dimensions 12.47 mm × 14.99 mm and maximum height 3.35 mm. Pin 1 is marked by a corner notch and is a no-connect (NC) terminal per datasheet specification.
How is end-of-program detection implemented in the AT49F001N-70JI?
The AT49F001N-70JI supports two hardware-supported end-of-program detection methods: DATA polling (monitoring I/O7 for complemented data) and Toggle Bit (observing I/O6 toggling state). Both operate asynchronously during byte programming and erase cycles. These mechanisms eliminate reliance on fixed software delays and enable precise timing control - a critical feature confirmed in AT49F001N-70JI datasheet Sections 5 and 12.
What is the maximum number of program/erase cycles guaranteed for the AT49F001N-70JI?
The AT49F001N-70JI is rated for a minimum of 10,000 program/erase cycles per memory location, as specified in the "Features" section (page 1) and confirmed in the "DC and AC Operating Range" table (page 7) of its official datasheet. This endurance applies across all sectors - boot block, parameter blocks, and main memory - provided operating conditions (VCC, temperature, timing) remain within datasheet limits.
AT49F001N-70JI 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:
- 70 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-70JI FAQ
1.How can I place an order for AT49F001N-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-70JI 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-70JI reliable?
The price and inventory of AT49F001N-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-70JI is usually 5 days.
3.What payment methods are accepted for AT49F001N-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-70JI?
AT49F001N-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-70JI 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-70JI?
For technical support, including AT49F001N-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-70JI requirements.
6.How does Aetrix verify that AT49F001N-70JI is sourced from the original manufacturer or authorized distributors?
All AT49F001N-70JI 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-70JI meets industry standards.
7.What is the process for return or replacement of AT49F001N-70JI?
All AT49F001N-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-70JI, 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-70JI part is unused and in its original packaging.
Return procedure for AT49F001N-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001N-70JI Tags
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M24C02-WMN6TP
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AT21CS01-STUM10-T
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