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Microchip Technology AT49F001N-12JC
- Part No.:
- AT49F001N-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001N-12JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,269
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Product details
Overview
AT49F001N-12JC 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-12JC datasheet, AT49F001N-12JC pinout, AT49F001N-12JC application, or AT49F001N-12JC equivalent, this page delivers verified electrical specs, PLCC-32 package layout, boot-block security behavior, timing waveforms, and real-world use cases in firmware update, BIOS storage, and industrial controller configuration.
Technical Context
The AT49F001N-12JC implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based programming/erasure. Its internal architecture includes separate boot, parameter, and main memory blocks-each independently erasable-and integrates DATA polling and toggle-bit status detection for cycle completion monitoring.
It operates exclusively at 5V ±10%, uses CMOS-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V), and enforces hardware safeguards including VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and multi-level command sequencing to prevent accidental writes. The RESET pin is DC-connected but not functional for boot override in the N variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full firmware images or large configuration tables. |
| Read Access Time | 120 ns max (tACC) - compatible with 8 MHz bus timing in legacy microcontroller systems. |
| Byte Programming Time | 10 µs typical (tBP) - enables rapid field updates without long write stalls. |
| Chip Erase Time | 10 seconds max (tEC) - deterministic bulk reset of user memory while preserving boot integrity when lockout enabled. |
| Endurance | 10,000 program/erase cycles - validated lifetime for infrequent firmware revision deployments. |
| Power Dissipation | 275 mW active (50 mA @ 5.5 V), <100 µA standby - suitable for low-power industrial controllers during sleep modes. |
| Operating Temperature | 0°C to +70°C (Commercial grade) - qualified for office, lab, and non-extreme industrial environments. |
Pinout & Package
AT49F001N-12JC is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE, with lead pitch 1.27 mm and body size 12.45 × 14.95 mm. Pin 1 is marked by a corner notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0 LSB, A16 MSB. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; high-impedance when CE or OE high. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output gate; controls data bus drive; dual-line control prevents bus contention. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence. |
| RESET | Reset Input | DC-connected (not 12 V capable); forces outputs to high-Z; halts ongoing operations on low assertion. |
| NC | No Connect | Pin 1 (PLCC): unused; must remain unconnected per datasheet Note *. |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and I/O buffers. |
| GND | Ground | Reference return path for all signals and power. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | One 16 KB boot block (00000–03FFFh), two 8 KB parameter blocks, and two main memory blocks (32 KB + 64 KB) - enables selective firmware updates without full chip erase. |
| Boot Block Lockout | Software-enabled permanent write protection for boot sector; prevents corruption of startup code during field upgrades. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibition (OE high / CE high / WE high) eliminate spurious writes under EMI or brown-out conditions. |
| Status Monitoring | DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) provide software-visible, cycle-accurate program/erase completion detection. |
| 5V-Only Operation | No external high-voltage programming supply required - simplifies system power design and eliminates HV charge pumps. |
Applications
| Embedded Firmware Storage | Industrial Controller Configuration |
|---|---|
Use Scenario: Storing boot loader and application firmware for 8/16-bit microcontrollers in factory automation PLCs. IC Role / Device Role / Timing Role: Nonvolatile code memory mapped into CPU address space; accessed via parallel bus with 120 ns tACC timing. Use Value: Enables field-upgradable firmware without removing the device; boot block lockout ensures bootloader integrity across multiple revisions. |
Use Scenario: Holding calibration data, I/O mapping tables, and operational parameters in programmable logic controllers. IC Role / Device Role / Timing Role: Parameter block (8 KB × 2) provides dedicated, fast-erasable storage for runtime-configurable settings. Use Value: Sector erase allows independent update of configuration without disturbing firmware or boot code - reducing downtime during commissioning. |
| BIOS/UEFI Module | Legacy PC Peripheral Firmware |
Use Scenario: BIOS storage in embedded x86 platforms where compatibility with ISA/PCI legacy interfaces is required. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced directly to chipset address/data buses; supports standard EPROM read protocol. Use Value: 5V-only operation and 120 ns access meet legacy timing budgets; boot lockout prevents accidental BIOS overwrite during POST. |
Use Scenario: Firmware storage for add-in cards such as SCSI host adapters or network interface controllers. IC Role / Device Role / Timing Role: Standalone Flash memory providing initialization code and driver descriptors to host system during enumeration. Use Value: Hardware data protection ensures reliability in electrically noisy backplane environments; 10,000-cycle endurance supports decades of field service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001BT-120EC | 3.3 V core with 5 V tolerant I/O; 120 ns access; 1 Mbit; boot-block architecture; no RESET pin. | Requires level-shifting or mixed-voltage design; lacks hardware reset control; different command set. | Choose if migrating to lower-power 3.3 V systems; verify command compatibility and voltage translation. |
| SST39VF010-120-4C-NHE | 3.3 V only; 120 ns access; 1 Mbit; single power supply; no boot-block lockout; supports byte-write without pre-erase. | Not 5 V compatible; no hardware-protected boot region; simpler command set but less secure for firmware storage. | Prefer for cost-sensitive, low-voltage designs where boot integrity is managed externally. |
Compared with AM29LV001BT-120EC and SST39VF010-120-4C-NHE, the AT49F001N-12JC uniquely delivers 5V-only operation, integrated boot-block lockout, and a functional RESET pin - making it optimal for legacy 5V embedded systems requiring robust firmware partitioning and in-system reprogrammability.
Availability
AT49F001N-12JC is available at Aetrix Electronics and suitable for embedded firmware storage, industrial controller configuration, and legacy BIOS modules requiring stable component supply across commercial temperature range (0°C to +70°C).
Supply support for AT49F001N-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 its Flash memory portfolio, emphasizing reliability, longevity, and industrial-grade qualification for legacy and migration-critical applications.
The AT49F001N-12JC belongs to Atmel's parallel Flash family designed for drop-in replacement of EPROMs in 5V microcontroller systems - prioritizing in-system reprogrammability, sector-level flexibility, and hardware-level data integrity.
FAQ
What is the function of the RESET pin on the AT49F001N-12JC?
The RESET pin on the AT49F001N-12JC is a DC-connected input that forces the device into high-impedance output state and halts ongoing operations when driven low. Unlike the T variant, it does not support 12 V override for boot block reprogramming. Its primary role is system-level synchronization and safe interruption of erase/program cycles in the AT49F001N-12JC.
Does the AT49F001N-12JC support true byte programming without prior sector erase?
No. The AT49F001N-12JC requires a sector or chip erase before byte programming - erased bits are logical "1", and programming sets bits to "0". Reverting a "0" to "1" is only possible via erase. This constraint applies uniformly across all memory regions in the AT49F001N-12JC, including parameter and main memory blocks.
How is boot block programming lockout enabled and verified on the AT49F001N-12JC?
Boot block lockout on the AT49F001N-12JC is enabled via a six-cycle command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Verification is performed in Software Product Identification mode: reading address 00002h returns I/O0 = high if lockout is active. This behavior is fixed for the AT49F001N-12JC.
What package type does the AT49F001N-12JC use, and is it pin-compatible with other variants?
The AT49F001N-12JC uses a 32-lead PLCC (32J) package per JEDEC MS-016. It shares identical pinout and signal definitions with all AT49F001x-12x variants (e.g., AT49F001-12JC, AT49F001T-12JC) in the same package - enabling direct substitution where voltage, timing, and feature requirements align. Pin 1 is NC and must remain unconnected.
Can the AT49F001N-12JC be used in industrial temperature applications?
No. The AT49F001N-12JC is rated for commercial temperature range (0°C to +70°C) only. For industrial (-40°C to +85°C) operation, the correct part is AT49F001N-12JI (PLCC) or AT49F001N-12TI (TSOP). Using the -12JC outside its specified range may result in timing violations, data retention loss, or premature wear - the AT49F001N-12JC is not qualified for extended thermal stress.
AT49F001N-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)
AT49F001N-12JC FAQ
1.How can I place an order for AT49F001N-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-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 AT49F001N-12JC reliable?
The price and inventory of AT49F001N-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-12JC is usually 5 days.
3.What payment methods are accepted for AT49F001N-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-12JC?
AT49F001N-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-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 AT49F001N-12JC?
For technical support, including AT49F001N-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-12JC requirements.
6.How does Aetrix verify that AT49F001N-12JC is sourced from the original manufacturer or authorized distributors?
All AT49F001N-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 AT49F001N-12JC meets industry standards.
7.What is the process for return or replacement of AT49F001N-12JC?
All AT49F001N-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-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 AT49F001N-12JC part is unused and in its original packaging.
Return procedure for AT49F001N-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001N-12JC Tags
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