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Microchip Technology AT49F001N-55PC
- Part No.:
- AT49F001N-55PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F001N-55PC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,125
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Product details
Overview
AT49F001N-55PC 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 AT49F001N-55PC datasheet, AT49F001N-55PC pinout, AT49F001N-55PC application, or AT49F001N-55PC equivalent, key selection considerations include its 32-pin PDIP package, 5V-only operation without high-voltage programming, boot block write protection, DATA polling/Toggle Bit status detection, and compatibility with standard EPROM-like bus interface timing.
Technical Context
The AT49F001N-55PC implements a command-register-based architecture requiring six-byte software command sequences for chip/sector erase and boot lock enable. Its memory is partitioned into one 16KB boot block (00000H–03FFFH), two 8KB parameter blocks, and two main memory blocks (32KB + 64KB), enabling selective erasure without affecting protected firmware.
It supports standard microprocessor bus timing with CE/OE/WE control, features VCC sense (inhibit below 3.8V), noise filtering on WE/CE (<15 ns pulses ignored), and dual status detection (DATA polling on I/O7, Toggle Bit on I/O6) to confirm program/erase completion without external clocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for full bootloader + configuration data in resource-constrained systems. |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in 20 MHz+ microcontroller systems without wait states. |
| Byte Programming Time | 10 µs typical - allows rapid field updates of small configuration parameters or calibration tables. |
| Chip Erase Time | 10 seconds - deterministic internal timing eliminates need for external erase controllers or watchdog supervision. |
| Operating Voltage | 5V ±10% - simplifies power design by eliminating separate 12V programming supply or charge pumps. |
| Standby Current | 100 µA (CMOS) - supports low-power sleep modes in battery-backed or energy-sensitive applications. |
| Endurance | 10,000 write/erase cycles - validated for firmware update cycles over 5+ years in industrial deployments. |
| Temperature Range | 0°C to +70°C (Commercial) - suitable for office, lab, and non-extreme industrial environments. |
Pinout & Package
AT49F001N-55PC is supplied in a 32-lead, 0.600" wide plastic dual in-line package (PDIP), designated as package type 32P6 per Microchip's ordering information. Pin 1 is located at the left end of the top row when viewed with notch up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0 is LSB, A16 is MSB. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; supports byte-wide reads and writes; 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; enables bus sharing. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during multi-device operation. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces outputs to high-Z; not used for boot override (unavailable on N variant). |
| VCC | Power Supply | +5V ±10% supply; powers all internal logic and memory array; requires local decoupling. |
| GND | Ground | Signal and power reference; must be low-impedance connection to minimize noise coupling. |
| NC | No Connect | Pin 9 is NC in TSOP/VSOP but is connected in PDIP; in AT49F001N-55PC (PDIP), pin 9 is functional RESET - no NC pins present. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16KB boot block (00000H–03FFFH) can be permanently write-protected via command sequence, ensuring bootloader integrity during field updates. |
| 5V-Only Reprogramming | Eliminates need for 12V programming supply or external voltage translators - reduces BOM count and layout complexity. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, hardware-verified status of program/erase completion without polling timers or interrupts. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibition prevent accidental writes due to power glitches or EMI transients. |
| Standard EPROM Bus Interface | CE/OE/WE control and timing compatibility allow drop-in replacement of UV-EPROMs in legacy designs without logic changes. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware and I/O mapping tables in programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Nonvolatile code storage IC with in-system reprogrammability and boot block protection to preserve core runtime engine across field updates. Use Value: Enables remote firmware patches without hardware intervention while preventing corruption of critical startup routines via hardware-enforced write lock. | Use Scenario: Holding calibrated sensor offsets, device serial numbers, and regulatory compliance flags in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage IC with byte-level write capability and 10,000-cycle endurance for lifetime calibration data logging. Use Value: Supports FDA-required traceability and recalibration without replacing PCBs; low 100 µA standby current extends battery life between service intervals. |
| Embedded Network Router Bootloader | Automotive Body Control Module (BCM) Settings |
Use Scenario: Hosting secure boot code and fail-safe recovery image in residential/commercial network gateways subject to OTA firmware upgrades. IC Role / Device Role / Timing Role: Trusted boot memory IC with hardware-protected boot sector and fast 55 ns read access for deterministic boot timing. Use Value: Guarantees boot integrity against malicious or corrupted updates; 55 ns access ensures sub-100 ms boot time even on 20 MHz bus interfaces. | Use Scenario: Retaining user-configurable lighting profiles, door lock preferences, and seat position memories in automotive BCMs. IC Role / Device Role / Timing Role: Persistent settings storage IC with sector-erase flexibility to update parameter blocks independently of main firmware. Use Value: Allows dealership-level personalization without reprogramming entire MCU flash; 8KB parameter blocks support concurrent storage of multiple vehicle-specific configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29C010A-15PU | 1 Mbit, 150 ns access, 5V-only, same PDIP-32 package, but lacks boot block lockout and uses different command set. | Not suitable for secure boot applications requiring hardware write protection; better for cost-sensitive, non-critical data logging. | Select only if boot protection is unnecessary and slower access time is acceptable. |
| SST39VF010-55-4C-NHE | 1 Mbit, 55 ns access, 3.3V/5V tolerant, PDIP-32, includes boot block protection but uses different sector map (8KB boot) and command protocol. | Requires minor firmware adaptation for command sequences; supports mixed-voltage systems where 3.3V I/O is preferred. | Choose when system operates at 3.3V logic levels or requires voltage flexibility; verify sector address alignment in host code. |
Compared with AT49F001N-55PC, AT29C010A-15PU trades security and speed for lower cost and simpler command handling, while SST39VF010-55-4C-NHE adds voltage flexibility and comparable speed but demands command-set revalidation - making AT49F001N-55PC optimal for 5V-only, boot-critical industrial firmware storage.
Availability
AT49F001N-55PC is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device configuration memory, embedded network router bootloaders, and automotive body control module settings requiring stable component supply and long-term obsolescence management.
Supply support for AT49F001N-55PC 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 product support for legacy Atmel Flash devices.
The AT49F001 family was designed by Atmel as a 5V-only, in-system reprogrammable Flash memory solution targeting cost-sensitive, reliability-critical embedded systems requiring field-upgradable firmware with hardware-enforced boot protection.
FAQ
What is the memory organization of the AT49F001N-55PC?
The AT49F001N-55PC contains 1 Mbit (131,072 × 8) of Flash memory organized as 128K words × 8 bits. Its physical address space spans 00000H to 1FFFFH, partitioned into one 16KB boot block (00000H–03FFFH), two 8KB parameter blocks, and two main memory blocks (32KB and 64KB). This structure enables selective erasure and protects critical boot code.
Does the AT49F001N-55PC support hardware reset-based boot block reprogramming?
No, the AT49F001N-55PC does not support RESET pin-based boot block override. Unlike the AT49F001T variant, the "N" suffix indicates the RESET pin is DC (not voltage-override capable), and boot block lockout - once enabled - is permanent under 5.5V operation. The AT49F001N-55PC datasheet explicitly states this feature is unavailable for the N variant.
How is program completion detected on the AT49F001N-55PC?
The AT49F001N-55PC provides 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 and stabilizes upon completion). Both methods eliminate need for fixed delay loops and enable precise, interrupt-driven status monitoring in host firmware.
What package type and pin count does the AT49F001N-55PC use?
The AT49F001N-55PC uses a 32-lead, 0.600" wide plastic dual in-line package (PDIP), designated as package type 32P6. It has 32 physical pins with standard DIP footprint (0.1" row spacing, 0.6" body width), compatible with through-hole assembly and legacy EPROM sockets. Pin 1 is marked by a notch or dot at the top-left corner.
Is the AT49F001N-55PC compatible with standard EPROM interfaces?
Yes, the AT49F001N-55PC is designed for pin- and timing-compatible replacement of 27C010/27C020 EPROMs. It uses identical CE/OE/WE control signals, same address/data bus structure, and EPROM-like read timing (55 ns access), allowing integration into existing microprocessor buses without logic redesign - though write command sequences differ and require firmware adaptation.
AT49F001N-55PC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F001N-55PC FAQ
1.How can I place an order for AT49F001N-55PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-55PC 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-55PC reliable?
The price and inventory of AT49F001N-55PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-55PC is usually 5 days.
3.What payment methods are accepted for AT49F001N-55PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-55PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-55PC?
AT49F001N-55PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-55PC 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-55PC?
For technical support, including AT49F001N-55PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-55PC requirements.
6.How does Aetrix verify that AT49F001N-55PC is sourced from the original manufacturer or authorized distributors?
All AT49F001N-55PC 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-55PC meets industry standards.
7.What is the process for return or replacement of AT49F001N-55PC?
All AT49F001N-55PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-55PC, 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-55PC part is unused and in its original packaging.
Return procedure for AT49F001N-55PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001N-55PC Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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