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Microchip Technology AT49F001NT-55PI
- Part No.:
- AT49F001NT-55PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F001NT-55PI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,023
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Product details
Overview
AT49F001NT-55PI 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 55 ns read access time, 10 µs typical byte programming, 10-second chip erase, hardware data protection, and sector-based architecture with 16KB boot block lockout. It is commonly deployed in industrial control firmware storage where field-upgradable secure boot code is required.
For engineers reviewing the AT49F001NT-55PI datasheet, AT49F001NT-55PI pinout, AT49F001NT-55PI application, or AT49F001NT-55PI equivalent, key selection considerations include its industrial temperature range (−40°C to +85°C), PLCC/PDIP/TSOP/VSOP package compatibility, 5V-only operation without high-voltage programming, boot block write protection, and DATA polling/Toggle Bit end-of-program detection.
Technical Context
The AT49F001NT-55PI implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its sector map includes one 16KB boot block (address 1C000H–1FFFFH), two 8KB parameter blocks, and two main memory blocks (32KB and 64KB). Erase and program operations are fully internal-no external timing clocks or voltage sequencing needed.
It uses standard EPROM-compatible control signals (CE/OE/WE) for read mode, with RESET pin support for system-level reset coordination. The RESET pin enables boot block override at 12V (not available on AT49F001N(T) variants), and hardware protection includes VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line gating (OE low/CE high/WE high inhibits writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full firmware image storage for 8-bit/16-bit MCUs. |
| Read Access Time | 55 ns max - enables direct execution (XIP) from Flash in timing-critical embedded applications. |
| Byte Programming Time | 10 µs typical (50 µs max) - allows rapid field updates of configuration or calibration data without long delays. |
| Chip Erase Time | 10 seconds - deterministic, internally timed; no external controller overhead required. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - validated for repeated firmware revision deployments in industrial lifecycle applications. |
| Operating Voltage | 5.0 V ±10% - single-supply operation compatible with legacy 5V logic and microcontrollers. |
| Temperature Range | −40°C to +85°C (Industrial) - qualified for use in factory automation, motor drives, and outdoor equipment. |
Pinout & Package
AT49F001NT-55PI is available in 32-lead PDIP (32P6) package per ordering code suffix "PI", with 0.600" width and through-hole mounting. Pin 1 is index-marked; pin 9 is NC (No Connect) in TSOP/VSOP but functional in PDIP/PLCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0 least significant bit. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; outputs valid during read, inputs latched during program/erase cycles. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; controls device selection on shared bus. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention; high-Z when deasserted. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low system reset; halts ongoing operations and forces high-Z outputs; 12V input enables boot block override. |
| VCC | Power Supply | +5V supply pin; must be stable within ±10%; internal VCC sense disables programming if <3.8V. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal circuitry. |
| NC | No Connect | Pin 9 in TSOP/VSOP packages; not bonded - must be left floating or tied to GND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16KB boot block (1C000H–1FFFFH) programmable lockout prevents accidental overwrite of secure startup code. |
| Hardware Data Protection | VCC sense, noise-filtered WE/CE inputs, and control-line gating eliminate spurious writes in electrically noisy environments. |
| 5V-Only Reprogrammability | No external 12V programming supply needed - simplifies system power design and eliminates HV charge pumps. |
| DATA Polling & Toggle Bit | Real-time, pin-level status feedback (I/O7/I/O6) replaces fixed-delay polling loops in host firmware. |
| Low Power Standby | 100 µA CMOS standby current - suitable for battery-backed or energy-sensitive industrial monitoring nodes. |
| Industrial Temperature Qualification | Rated −40°C to +85°C with full AC/DC specs guaranteed - supports deployment in uncontrolled ambient environments. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory-floor environments with wide thermal swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing XIP-capable read access and field-upgradable program memory with sector-level erase granularity. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; 55 ns access enables real-time scan-cycle execution without external RAM caching. |
Use Scenario: Retaining device-specific calibration coefficients, safety-critical boot parameters, and regulatory-compliant firmware versions in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration memory with hardware write protection and deterministic erase timing. Use Value: 12V RESET override allows authorized service personnel to recover corrupted boot sectors; 100 µA standby current extends battery life in handheld units. |
| Automotive Body Control Module (BCM) | Telecom Remote Node Bootloader |
Use Scenario: Hosting boot code and feature-enabling flags in under-hood BCMs subject to automotive-grade thermal and vibration stress. IC Role / Device Role / Timing Role: Industrial-qualified Flash memory serving as primary boot source with lockable secure region. Use Value: −40°C to +85°C operation meets AEC-Q100 ambient requirements; sector erase enables incremental firmware patching without full reflash downtime. |
Use Scenario: Storing upgradeable bootloader and communication stack firmware in remote base station modules requiring zero-downtime field updates. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory supporting over-the-air (OTA) update rollback and dual-bank emulation. Use Value: Command-based sector erase allows atomic swap between active/inactive firmware banks; DATA polling enables precise host synchronization during OTA commit phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-55-4C-NHE | 55 ns access, 1 Mbit, 3.3V core (5V tolerant I/O), 100K endurance, no boot block lockout | Lacks dedicated boot sector protection; requires external voltage translation in pure 5V systems | Choose for lower active power (18 mA) and higher endurance where boot security is managed in software. |
| MX29LV160CBTI-55G | 55 ns access, 16 Mbit density, 3.0V operation, CFI-compliant, 16KB boot sector with RY/BY# status | Higher density and modern CFI interface; incompatible voltage and command set; no 5V-only operation | Choose for migration paths requiring larger code space and standardized flash interfaces; not drop-in replaceable. |
Compared with SST39VF010-55-4C-NHE and MX29LV160CBTI-55G, the AT49F001NT-55PI uniquely provides 5V-only operation with hardware-enforced boot block lockout and 12V RESET override-critical for legacy 5V industrial designs requiring field-recoverable secure boot.
Availability
AT49F001NT-55PI is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device calibration retention, and automotive body control module boot memory requiring stable component supply across extended product lifecycles.
Supply support for AT49F001NT-55PI 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 AT49F001 family. Microchip is a global leader in microcontrollers, analog, and Flash memory solutions.
The AT49F001 series was designed by Atmel as cost-optimized, 5V-only Flash memory for embedded systems requiring simple in-system reprogramming without high-voltage circuitry-targeting industrial, telecom, and consumer control applications.
FAQ
What is the boot block address range for AT49F001NT-55PI?
The AT49F001NT-55PI boot block occupies addresses 1C000H to 1FFFFH (16 KB). This differs from the base AT49F001(N) variant, which places the boot block at 00000H–03FFFH. The relocated boot sector supports flexible memory mapping in systems where low-address space is reserved for RAM or peripherals. The AT49F001NT-55PI datasheet confirms this range in Section 6, Notes.
Does AT49F001NT-55PI support 12V RESET override for boot block reprogramming?
No - the 12V RESET override feature is explicitly excluded from the AT49F001N(T) and AT49F001NT variants per the datasheet Note on page 3: "The RESET feature is not available for the AT49F001N(T)." Therefore, AT49F001NT-55PI cannot use 12V on RESET to unlock the boot block; only the base AT49F001(T) supports this function.
What package type does the "PI" suffix indicate for AT49F001NT-55PI?
The "PI" suffix in AT49F001NT-55PI denotes the 32-lead, 0.600" wide plastic dual in-line package (PDIP), also referenced as package type 32P6. This through-hole package is mechanically and electrically identical to the "PC" (commercial) variant except for its industrial temperature rating (−40°C to +85°C).
How is end-of-program detection implemented in AT49F001NT-55PI?
The AT49F001NT-55PI provides two hardware methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming/erase, then stabilizes). Both are usable at any time during the cycle and eliminate reliance on fixed timing delays in host firmware.
Is AT49F001NT-55PI pin-compatible with AT49F001N-55PI or AT49F001T-55PI?
Yes - all AT49F001x-55PI variants (including AT49F001NT-55PI) share identical pinouts, electrical characteristics, and package dimensions across PDIP, PLCC, TSOP, and VSOP options. The "NT" suffix indicates combined N- and T-series features (e.g., boot block at 1C000H), but pin assignment, timing, and DC specs remain fully compatible per Atmel's ordering matrix (page 17).
AT49F001NT-55PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- 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:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F001NT-55PI FAQ
1.How can I place an order for AT49F001NT-55PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001NT-55PI 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-55PI reliable?
The price and inventory of AT49F001NT-55PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001NT-55PI is usually 5 days.
3.What payment methods are accepted for AT49F001NT-55PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001NT-55PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001NT-55PI?
AT49F001NT-55PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001NT-55PI 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-55PI?
For technical support, including AT49F001NT-55PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001NT-55PI requirements.
6.How does Aetrix verify that AT49F001NT-55PI is sourced from the original manufacturer or authorized distributors?
All AT49F001NT-55PI 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-55PI meets industry standards.
7.What is the process for return or replacement of AT49F001NT-55PI?
All AT49F001NT-55PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001NT-55PI, 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-55PI part is unused and in its original packaging.
Return procedure for AT49F001NT-55PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001NT-55PI Tags
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