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Microchip Technology AT49F001NT-12JC
- Part No.:
- AT49F001NT-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001NT-12JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,843
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Product details
Overview
AT49F001NT-12JC from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC with 120 ns read access time, 10 µs/byte typical programming time, 10-second chip erase cycle, and sector-based architecture including a 16 KB boot block with programmable lockout. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F001NT-12JC datasheet, AT49F001NT-12JC pinout, AT49F001NT-12JC application, or AT49F001NT-12JC equivalent, key selection criteria include its PLCC-32 package, industrial temperature range (–40°C to +85°C), 5V single-supply operation, hardware data protection features, and boot-block write-protection capability for secure bootloader storage.
Technical Context
The AT49F001NT-12JC implements a command-driven architecture using standard CE/OE/WE control lines and six-byte software command sequences for chip erase, sector erase, byte programming, and boot block lockout. Its internal logic handles timing without external clocks, supporting both hardware and software product identification modes.
It features dual erase mechanisms-full chip erase (excluding locked boot block) and individual sector erase across two 8 KB parameter blocks and two main memory blocks (32 KB and 64 KB). The boot block resides at address 1C000H–1FFFFH and supports 12 V RESET override for reprogramming when lockout is enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - provides sufficient space for firmware images and configuration data in resource-constrained embedded hosts. |
| Read Access Time | 120 ns max - ensures compatibility with 8 MHz bus timing in legacy microcontroller systems without wait-state insertion. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of small code patches or parameter sets without system downtime. |
| Erase Cycle Time | 10 seconds max for full chip erase - balances speed and reliability for infrequent but critical firmware upgrades. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers during programming, improving host software robustness. |
| Power Dissipation | 275 mW active (55 ns grade), 100 µA CMOS standby - reduces thermal load and extends battery life in always-on industrial controllers. |
| Endurance | 10,000 program/erase cycles - supports multi-year field update cycles in deployed equipment with scheduled maintenance windows. |
| Operating Voltage | 5.0 V ±10% - simplifies power design by eliminating dedicated programming voltage rails or charge pumps. |
Pinout & Package
AT49F001NT-12JC is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 Variation AE, with dimensions 12.47 mm × 14.99 mm × 3.35 mm (max height), pin 1 identifier 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; A0–A16 map directly to memory location bits 0–16. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with standard microprocessor data buses; supports byte-wide reads and writes. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables bus contention avoidance. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, allowing shared bus operation. |
| WE | Write Enable | Active-low write strobe; latches address and data on falling/rising edges per command sequence timing requirements. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override (not available on N(T) variants). |
| VCC | Power Supply | +5 V supply pin; internally regulated for programming; VCC sense circuitry inhibits programming if voltage drops below 3.8 V. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal logic; requires low-inductance connection for noise immunity. |
| NC | No Connect | Pin 1 in PLCC package is NC - must remain unconnected per datasheet; not usable as spare I/O or tie point. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16 KB boot block (1C000H–1FFFFH) supports permanent lockout via 6-byte command sequence, enabling secure bootloader storage immune to accidental overwrite. |
| Hardware Data Protection | VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE high/CE high/WE high blocks writes) prevent spurious reprogramming. |
| Two End-of-Operation Detection Methods | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) allow flexible, deterministic host firmware synchronization without fixed delays or external timers. |
| 5V-Only Reprogrammability | Eliminates need for 12 V programming supplies or external high-voltage generators - simplifies PCB layout and reduces BOM count in embedded designs. |
| Industrial Temperature Range Support | Rated for –40°C to +85°C operation - suitable for deployment in factory automation, motor drives, and outdoor telemetry equipment without derating. |
| Standard Microprocessor Interface Timing | Complies with common 8051/68K/Z80 bus timing models (tWP ≥ 90 ns, tAS = 0 ns, tAH ≥ 50 ns), easing integration into legacy controller platforms. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware and calibration tables in programmable logic controllers operating in harsh factory environments with frequent power cycling. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot loader and application code; accessed via parallel bus during cold start and field updates. Use Value: 10,000-cycle endurance and industrial temperature rating ensure reliable operation over 10+ years; boot block lockout prevents corruption of safety-critical startup routines. |
Use Scenario: Retaining device-specific calibration coefficients and regulatory-compliant operational parameters in portable diagnostic instruments. IC Role / Device Role / Timing Role: Parameter storage element updated only during service calibration; read during power-on self-test and runtime sensor compensation. Use Value: Sector architecture allows independent erasure of parameter blocks without disturbing main firmware; DATA polling ensures deterministic update completion before clinical use. |
| Automotive Body Control Module (BCM) | Telecom Remote Node Boot Image |
Use Scenario: Hosting configurable lighting, door lock, and window control logic in automotive BCMs subject to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: In-system reprogrammable flash memory storing application firmware and vehicle-specific configuration maps. Use Value: 5V-only operation avoids high-voltage generation circuitry; hardware protection features guard against electrical transients on CAN/LIN bus-powered systems. |
Use Scenario: Storing primary boot image and fail-safe recovery firmware in remote base station nodes requiring zero-touch field upgrades over backhaul links. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; supports dual-image update schemes where one block remains active while the other is reprogrammed. Use Value: 120 ns read access meets timing budgets of ARM7/ARM9 host processors; sector erase enables atomic firmware swaps without system interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-70-4C-NHE | 5V-only, 1 Mbit, 70 ns access, PLCC-32; lacks boot block lockout and RESET-based override; uses different command set. | No hardware-enforced boot sector protection; requires external logic or software discipline to safeguard bootloader. | Select when lower access time is critical and boot security is managed at system level. |
| MX29LV160CBTI-70G | 3V/5V tolerant, 16 Mbit, 70 ns, TSOP-48; includes CFI-compliant command set and wider voltage range; incompatible pinout and density. | Higher density and dual-boot sector support, but requires PCB redesign and firmware adaptation for command interface. | Select for new designs needing scalability beyond 1 Mbit and future-proof 3V compatibility. |
Compared with SST39VF010-70-4C-NHE and MX29LV160CBTI-70G, the AT49F001NT-12JC offers unique boot block lockout with 12 V RESET override - a hardware-enforced security feature absent in both alternatives - making it preferable for legacy industrial systems where bootloader integrity is non-negotiable and board layout changes are prohibited.
Availability
AT49F001NT-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for AT49F001NT-12JC 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 memory products, including datasheets, application notes, and long-term supply commitments.
The AT49F001NT-12JC belongs to Atmel's 5V Flash memory family designed specifically for cost-sensitive, in-system reprogrammable applications in industrial control, instrumentation, and embedded computing where simplicity, reliability, and field upgradeability are essential.
FAQ
What is the maximum operating temperature range for the AT49F001NT-12JC?
The AT49F001NT-12JC is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the "DC and AC Operating Range" table of the datasheet, where the "-12" speed grade suffix denotes 120 ns access time and "I" suffix indicates industrial temperature range - explicitly assigned to ordering codes ending in "JI", such as AT49F001NT-12JI. The "JC" suffix in AT49F001NT-12JC confirms PLCC-32 packaging and commercial temperature range; however, the "-12JC" variant shown in the AT49F001NT Ordering Information table on page 17 is listed under Commercial (0° to 70°C). Therefore, AT49F001NT-12JC operates from 0°C to 70°C. For industrial range, the correct part is AT49F001NT-12JI.
Does the AT49F001NT-12JC support hardware reset-based boot block reprogramming?
No, the AT49F001NT-12JC does not support 12 V RESET-based boot block reprogramming. Per the datasheet note on page 3: "The RESET feature is not available for the AT49F001N(T)", and the "NT" suffix denotes the same variant family as "N(T)". Page 5 explicitly states the RESET override feature is unavailable on AT49F001N(T). Since AT49F001NT-12JC is an "NT" variant, it inherits this limitation. Boot block reprogramming is only possible before lockout activation or via standard 5 V command sequences if lockout is disabled.
What is the exact memory organization and address mapping of the boot block in AT49F001NT-12JC?
The AT49F001NT-12JC boot block occupies 16 KB (131,072 bits ÷ 8 = 16,384 bytes) and is located at address range 1C000H to 1FFFFH, as specified in Note 2 on page 6 and the "AT49F001(N)T" block diagram on page 2. This differs from the base AT49F001(N) variant, whose boot block resides at 00000H–03FFFH. The "T" suffix in AT49F001NT-12JC confirms it follows the AT49F001(N)T memory map, placing the protected boot sector at the top of the 128K address space.
Can the AT49F001NT-12JC be used as a direct replacement for EPROMs like the 27C010?
Yes, the AT49F001NT-12JC is functionally compatible with 27C010 EPROMs in read mode: it uses identical pinout (PLCC-32), same CE/OE/WE control signals, and standard microprocessor timing. However, unlike EPROMs, it requires no UV erasure and supports in-system reprogramming via 5 V commands. Write operations demand specific 6-byte command sequences and DATA polling or Toggle Bit verification - firmware must be adapted accordingly. Pin-for-pin replacement is feasible, but programming infrastructure must be updated.
What are the DC supply current specifications for AT49F001NT-12JC during active and standby operation?
The AT49F001NT-12JC draws 50 mA typical active current (ICC) at 5 MHz and 0.1 mA (100 µA) CMOS standby current (ISB1) under commercial temperature conditions, per the "AT49F001NT Ordering Information" table on page 17. These values are measured at VCC = 5.0 V ±10% and confirm low-power operation suitable for thermally constrained or battery-backed systems. Standby current increases to 300 µA in industrial grade variants (e.g., AT49F001NT-12JI), but AT49F001NT-12JC remains at 100 µA.
AT49F001NT-12JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49F001NT-12JC FAQ
1.How can I place an order for AT49F001NT-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001NT-12JC 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-12JC reliable?
The price and inventory of AT49F001NT-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001NT-12JC is usually 5 days.
3.What payment methods are accepted for AT49F001NT-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001NT-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001NT-12JC?
AT49F001NT-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001NT-12JC 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-12JC?
For technical support, including AT49F001NT-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001NT-12JC requirements.
6.How does Aetrix verify that AT49F001NT-12JC is sourced from the original manufacturer or authorized distributors?
All AT49F001NT-12JC 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-12JC meets industry standards.
7.What is the process for return or replacement of AT49F001NT-12JC?
All AT49F001NT-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001NT-12JC, 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-12JC part is unused and in its original packaging.
Return procedure for AT49F001NT-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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