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Microchip Technology AT49F001NT-90JC
- Part No.:
- AT49F001NT-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001NT-90JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,170
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Product details
Overview
AT49F001NT-90JC 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 90 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 featuring programmable lockout. It is deployed in industrial control firmware storage where field-upgradable secure boot code is required.
For engineers reviewing the AT49F001NT-90JC datasheet, AT49F001NT-90JC pinout, AT49F001NT-90JC application, or AT49F001NT-90JC equivalent, this page provides verified technical context, package-specific pin mapping, real-world use scenarios, and validated alternative parts - all grounded in the official AT49F001(N)(T) Rev. 1008D datasheet and Microchip's ordering documentation.
Technical Context
The AT49F001NT-90JC implements a command-driven Flash architecture requiring no high-voltage programming supply: all operations (read, byte program, sector/whole-chip erase, boot lock enable) are initiated via six-byte software command sequences written to specific address/data latches (e.g., 5555H/AAH → 2AAAH/55H → 5555H/80H). Its internal logic handles timing, eliminating external clocks during erase.
It features dual-mode operation: standard EPROM-like read mode (CE/OE low, WE high) and command-execution mode (OE high, CE/WE toggled per timing specs). The RESET pin supports both system reset and, on non-N(T) variants, 12 V override of boot block lockout - though AT49F001NT-90JC excludes this 12 V RESET functionality per datasheet Note * on page 2 and "RESET feature is not available for the AT49F001N(T)" on page 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for full bootloader + parameter tables in resource-constrained MCU systems. |
| Read Access Time | 90 ns max - enables direct execution from Flash (XIP) in 8-bit/16-bit bus microcontrollers without wait states at moderate clock speeds. |
| Byte Programming Time | 10 µs typical - allows rapid field updates of small configuration blocks or calibration data without system downtime. |
| Erase Cycle Time | 10 seconds max for full chip erase - deterministic timing simplifies host firmware timeout handling during firmware upgrades. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delays; enables pipelined read/program cycles. |
| Power Dissipation | 50 mA active current, 100 µA CMOS standby - suitable for battery-backed or low-power industrial nodes requiring persistent storage. |
| Endurance | 10,000 write/erase cycles - supports multi-year field update cycles in telemetry gateways and PLC modules. |
Pinout & Package
AT49F001NT-90JC is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package (JEDEC MS-016, Variation AE), with lead pitch 1.27 mm, body size 12.4–12.6 mm × 14.9–15.1 mm, and coplanarity ≤ 0.102 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 map directly to physical memory locations (e.g., boot block = 1C000H–1FFFFH). |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output and program data input; compatible with standard 8-bit microprocessor buses. |
| CE | Chip Enable | Active-low chip select; must be low with OE low for read access; used with WE to latch command addresses during programming/erase. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high - prevents bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches data during programming; controls command sequence timing (falling/rising edge sensitive per AC waveforms). |
| RESET | Reset Input | Active-low system reset; halts ongoing operations and forces high-Z outputs; on AT49F001NT-90JC, no 12 V override capability (per datasheet Note * and page 3). |
| VCC | Power Supply | +5.0 V ±10% supply; internal voltage sensing disables programming if VCC < 3.8 V (typical), preventing corruption during brown-out. |
| GND | Ground Reference | Signal and power ground return; decoupling capacitor (0.1 µF) required near VCC pin per layout guidelines. |
| NC | No Connect | Pin 1 in PLCC package is NC - must remain unconnected; not bonded internally (confirmed in DIP/PLCC/TSOP pin descriptions, page 4). |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables permanent storage of secure boot code (16 KB at 1C000H–1FFFFH) while allowing field updates to parameter blocks (2 × 8 KB) and main memory (32 KB + 64 KB); lockout activated via 6-byte command sequence. |
| Hardware Data Protection | VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low / CE high / WE high blocks writes) prevent accidental erasure in noisy industrial environments. |
| DATA Polling & Toggle Bit | Allows host firmware to poll I/O7 (complement-to-data) or I/O6 (toggle) to detect completion of program/erase - eliminates fixed delays and improves throughput in real-time systems. |
| 5V-Only Operation | Eliminates need for 12 V programming supplies or charge pumps; simplifies power design and reduces BOM cost in embedded controllers using single 5 V rail. |
| CMOS Standby Current | 100 µA max (commercial temp) - enables ultra-low-power sleep modes in battery-operated devices such as remote sensors and smart meters. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing and updating firmware for programmable logic controllers in factory automation, where firmware patches must preserve boot integrity across power cycles. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware-protected boot sector; 90 ns read access supports deterministic scan-cycle timing in real-time control loops. Use Value: Boot block lockout ensures bootloader remains uncorrupted during field updates; sector erase allows selective reprogramming of I/O driver modules without reloading entire firmware image. |
Use Scenario: Holding certified bootloader and safety-critical initialization routines in Class II medical equipment requiring FDA-compliant firmware traceability and tamper resistance. IC Role / Device Role / Timing Role: Secure, field-upgradable firmware repository; DATA polling enables precise timing control during boot validation sequences. Use Value: 10,000-cycle endurance supports multi-year device lifecycle with periodic regulatory-mandated firmware revisions; 5V-only operation simplifies compliance with low-voltage medical power standards. |
| Telecom Remote Node Configuration | Automotive Diagnostic Module |
Use Scenario: Storing network configuration parameters, encryption keys, and protocol stacks in cellular base station remote radio units exposed to wide temperature swings. IC Role / Device Role / Timing Role: Parameter block storage (2 × 8 KB) with independent sector erase; operates across -40°C to +85°C industrial range (AT49F001NT-90JI variant). Use Value: Low 100 µA standby current extends backup battery life during network outages; hardware protection prevents corruption from ESD events common in outdoor telecom enclosures. |
Use Scenario: Hosting OBD-II diagnostic firmware and vehicle-specific calibration maps in aftermarket engine control modules requiring field updates via CAN-based flash tools. IC Role / Device Role / Timing Role: In-system reprogrammable code memory interfaced to 8-bit MCU; 90 ns access enables fast response to diagnostic query commands. Use Value: Command-based architecture allows safe over-the-air updates without dedicated programming headers; sector erase isolates calibration data updates from core diagnostic logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 3.3 V core (5 V tolerant I/O), 90 ns access, 1 Mbit, PLCC32; lacks boot block lockout and RESET pin. | Requires level-shifting in pure 5 V systems; no hardware-protected boot region - relies on software-only protection schemes. | Choose for lower power and newer 3.3 V designs; avoid where boot integrity enforcement is mandatory. |
| MX29LV160CBTI-90G | 3.0 V core (5 V tolerant), 90 ns, 16 Mbit (2 MB), TSOP48; includes CFI-compliant command set and 16 KB boot sectors with lock bits. | Higher density and industry-standard CFI interface; pinout and voltage differ - requires PCB redesign and firmware adaptation. | Choose for scalability beyond 1 Mbit or CFI toolchain compatibility; not drop-in for AT49F001NT-90JC. |
Compared with SST39VF010-90-4C-NHE and MX29LV160CBTI-90G, the AT49F001NT-90JC uniquely combines 5 V native operation, hardware-enforced boot block lockout, and PLCC32 packaging - making it irreplaceable in legacy 5 V industrial controllers where board space, voltage compatibility, and boot security are jointly constrained.
Availability
AT49F001NT-90JC is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device bootloader retention, telecom remote node configuration, and automotive diagnostic module updates requiring stable component supply across extended product lifecycles.
Supply support for AT49F001NT-90JC 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products.
The AT49F001NT-90JC belongs to Atmel's 5 V Flash memory family, designed specifically for in-system reprogrammability in cost-sensitive, reliability-critical embedded systems where field firmware updates and boot code protection are essential.
FAQ
What is the boot block address range for AT49F001NT-90JC?
The boot block for AT49F001NT-90JC occupies address range 1C000H to 1FFFFH (16 KB), as confirmed in the datasheet Notes section (page 6) and Block Diagram (page 2). This differs from the base AT49F001(N) variant, which locates the boot block at 00000H–03FFFH. The AT49F001NT-90JC uses the "T" suffix configuration, aligning with the AT49F001(N)T family specification.
Does AT49F001NT-90JC support 12 V RESET override for boot block reprogramming?
No, AT49F001NT-90JC does not support 12 V RESET override. The datasheet explicitly states "The RESET feature is not available for the AT49F001N(T)" on page 3 and notes "*This pin is a DC on the AT49F001N(T)" on page 4 - confirming RESET is a static DC input only, with no high-voltage override function. This distinguishes it from non-(N)(T) variants like AT49F001.
What package type is used for AT49F001NT-90JC?
AT49F001NT-90JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as "32J" in Microchip's ordering information (page 17). Physical dimensions conform to JEDEC MS-016, Variation AE, with body size ~12.5 mm × 15.0 mm and 1.27 mm lead pitch - verified in the Packaging Information drawing (page 18).
How is end-of-program detection implemented in AT49F001NT-90JC?
AT49F001NT-90JC supports two hardware methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion, then true data) and Toggle Bit (I/O6 toggles between 0 and 1 during operation, stops toggling upon completion). Both are defined in the AC characteristics tables (pages 12–13) and require no external timing components.
Is AT49F001NT-90JC compatible with standard EPROM socket footprints?
Yes, AT49F001NT-90JC in PLCC32 (32J) package is pin-compatible with industry-standard 32-pin PLCC EPROM sockets (e.g., 27C512 footprint), as confirmed by identical pin count, lead pitch, and signal assignment (A0–A16, I/O0–I/O7, CE/OE/WE, VCC/GND). However, electrical behavior differs: it requires command sequences for programming, unlike UV-erasable EPROMs.
AT49F001NT-90JC 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:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49F001NT-90JC FAQ
1.How can I place an order for AT49F001NT-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001NT-90JC 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-90JC reliable?
The price and inventory of AT49F001NT-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001NT-90JC is usually 5 days.
3.What payment methods are accepted for AT49F001NT-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001NT-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001NT-90JC?
AT49F001NT-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001NT-90JC 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-90JC?
For technical support, including AT49F001NT-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001NT-90JC requirements.
6.How does Aetrix verify that AT49F001NT-90JC is sourced from the original manufacturer or authorized distributors?
All AT49F001NT-90JC 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-90JC meets industry standards.
7.What is the process for return or replacement of AT49F001NT-90JC?
All AT49F001NT-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001NT-90JC, 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-90JC part is unused and in its original packaging.
Return procedure for AT49F001NT-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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