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Microchip Technology AT49F001N-70PC
- Part No.:
- AT49F001N-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F001N-70PC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,213
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Product details
Overview
AT49F001N-70PC 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 architecture with 16K-byte 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-70PC datasheet, AT49F001N-70PC pinout, AT49F001N-70PC application, or AT49F001N-70PC equivalent, key selection considerations include its 32-pin PDIP package, 5V-only operation without high-voltage programming, boot block write protection logic, DATA polling/Toggle Bit end-of-program detection, and compatibility with standard EPROM-like bus interface timing.
Technical Context
The AT49F001N-70PC implements a command-based Flash architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its internal program control logic handles pulse generation and timing autonomously, eliminating external high-voltage circuitry. Sector organization includes one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (32K/64K bytes).
It operates in standard EPROM read mode (CE/OE low, WE high) and supports hardware reset-driven boot override (12V on RESET pin - though not functional on the N variant). The device uses VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and dual-line control (CE/OE) to prevent bus contention during active and standby states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for small MCU bootloaders and configuration tables. |
| Read Access Time | 70 ns max - ensures compatibility with 14 MHz system buses without wait states. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of individual configuration registers or calibration data. |
| Chip Erase Time | 10 seconds - allows full memory reset during manufacturing or recovery without external programmer dependency. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Boot Block Protection | 16K-byte region (00000H–03FFFH) with lockout via 6-byte command sequence - preserves secure boot code integrity across field updates. |
| Power Dissipation | 275 mW active (55 ns), <100 µA CMOS standby - suitable for low-power industrial nodes with intermittent firmware access. |
Pinout & Package
AT49F001N-70PC is supplied in a 32-lead, 0.600" wide plastic dual in-line package (PDIP), designated 32P6 per Microchip ordering nomenclature. Pin 1 is index corner, with no-connect (NC) on pin 32 per datasheet Note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 directly map to memory locations 00000H–1FFFFH. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device selection on shared data bus. |
| OE | Output Enable | Active-low output gate; used with CE to avoid bus contention; high-Z when deasserted even if CE is low. |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences; inhibits writes if held high. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read data output and program data input; supports byte-level granularity for partial updates. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces outputs to high-Z; 12V override capability is disabled on AT49F001N variants. |
| VCC | Power Supply | +5V ±10% supply; internal VCC sense disables programming if voltage drops below ~3.8V. |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal logic; decoupling near VCC pin is mandatory for stable operation. |
| NC | No Connect | Pin 32 is unconnected - must remain floating; no PCB trace or pull-up/down required. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for +12V programming voltage rails, simplifying power design and enabling direct MCU GPIO control. |
| Sector Architecture with Boot Lockout | Enables secure firmware partitioning: protected 16K boot sector remains immutable while parameter and application sectors are updated independently. |
| Hardware Data Protection | VCC sensing, noise filtering, and multi-signal inhibit (OE high / CE high / WE high) prevent accidental writes during power transients or EMI events. |
| DATA Polling & Toggle Bit | Allows host processor to poll status in real time without fixed delays - reduces firmware overhead and improves update reliability. |
| 10,000 Program/Erase Cycles | Supports long-term field maintenance of calibration data, logging buffers, or user-configurable parameters over product lifetime. |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in factory-floor environments with temperature cycling and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage IC interfaced directly to an 8-bit microcontroller bus; provides 70 ns read access for deterministic boot execution. Use Value: Boot block lockout prevents corruption of safety-critical startup routines during remote firmware updates over Modbus or CAN. |
Use Scenario: Holding bootloader code in microcontroller-based medical devices requiring FDA-compliant field upgrades without hardware rework. IC Role / Device Role / Timing Role: Standalone Flash memory mapped into MCU address space; accessed via standard CE/OE/WE control signals during power-on initialization. Use Value: 5V-only operation avoids high-voltage programming circuitry, reducing BOM cost and board area while maintaining 10,000-cycle endurance for regulatory audit logs. |
| Automotive Diagnostic Module Storage | Point-of-Sale Terminal Configuration |
Use Scenario: Retaining diagnostic fault codes and calibration offsets in OBD-II modules exposed to automotive temperature ranges (-40°C to +85°C). IC Role / Device Role / Timing Role: Industrial-grade Flash memory with 70 ns access and 300 µA standby current; selected for extended temperature support per AT49F001N-70PI equivalent family. Use Value: Sector erase capability allows selective clearing of DTC history without erasing permanent calibration data stored in parameter blocks. |
Use Scenario: Storing localized language packs, tax rate tables, and merchant-specific settings in retail payment terminals deployed globally. IC Role / Device Role / Timing Role: Field-upgradable nonvolatile memory connected to an 8-bit MPU; leverages DATA polling to confirm write completion before transaction commit. Use Value: 16K boot block lockout ensures core payment stack integrity while allowing dynamic updates to jurisdictional compliance data in main memory blocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29C010A-70PU | Same 1 Mbit density, 70 ns access, but lacks boot block lockout and uses different command set; requires 12V VPP for programming. | Not suitable for secure boot applications; requires external high-voltage generator and additional PCB routing. | Select only if legacy 12V infrastructure exists and boot protection is unnecessary. |
| SST39SF010A-70-4C-NHE | 1 Mbit, 70 ns, 5V-only, but uses single-power-supply byte-programming with no boot sector protection; supports only full-chip or uniform-sector erase. | Lacks dedicated boot block - cannot isolate critical startup code from field updates; higher risk of bricking during partial reprogramming. | Prefer for cost-sensitive designs where firmware immutability is not required and simpler command protocol is advantageous. |
Compared with AT29C010A-70PU and SST39SF010A-70-4C-NHE, the AT49F001N-70PC uniquely delivers 5V-only operation *with* hardware-enforced boot block write protection and flexible sector erase - making it the only option among the three that guarantees secure, field-upgradable firmware architecture without external high-voltage components.
Availability
AT49F001N-70PC is available at Aetrix Electronics and suitable for industrial control systems, embedded bootloader implementations, and automotive diagnostic modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49F001N-70PC 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 the legacy AT49F series Flash memories, including datasheets, application notes, and long-term supply commitments.
The AT49F001N product line was designed for cost-effective, 5V-only in-system reprogrammability in resource-constrained embedded systems - prioritizing simplicity of integration, robustness against inadvertent writes, and secure firmware partitioning.
FAQ
What is the function of the RESET pin on the AT49F001N-70PC?
The RESET pin on the AT49F001N-70PC is an active-low input that halts ongoing program or erase operations and places all outputs in high-impedance state. Unlike the T variant, the AT49F001N-70PC does not support 12V override of boot block lockout via RESET - this feature is explicitly disabled per datasheet Note. Standard TTL-level reset signaling is used solely for operational interruption and safe bus release.
Does the AT49F001N-70PC require high-voltage programming?
No, the AT49F001N-70PC operates exclusively at 5V for both read and programming functions. It uses internally generated programming pulses triggered by standard 5V command sequences - no external +12V VPP supply or high-voltage charge pump circuitry is needed. This simplifies PCB layout and eliminates risks associated with high-voltage routing and regulation.
How is boot block protection enabled on the AT49F001N-70PC?
Boot block protection on the AT49F001N-70PC is enabled by executing a precise six-byte command sequence: load 0x5555/0xAA, 0x2AAA/0x55, 0x5555/0x80, 0x5555/0xAA, 0x2AAA/0x55, then 0x5555/0x40. Once activated, the 16K-byte boot sector (00000H–03FFFH) becomes permanently write-protected under 5.5V operation - no further erases or writes are possible without hardware reset or replacement.
What package type is used for the AT49F001N-70PC?
The AT49F001N-70PC uses a 32-lead, 0.600" wide plastic dual in-line package (PDIP), designated as 32P6 in Microchip's packaging nomenclature. Pin 1 is located at the index corner; pin 32 is a no-connect (NC) terminal and must remain unconnected on the PCB.
Can the AT49F001N-70PC be used in industrial temperature applications?
Yes - the "-70" speed grade suffix indicates guaranteed 70 ns read access time, and the "PC" suffix denotes commercial temperature range (0°C to +70°C). For industrial applications (-40°C to +85°C), the correct variant is AT49F001N-70PI (same speed, industrial temp, PDIP package). Using AT49F001N-70PC outside its rated range may result in timing violations or data retention failure.
AT49F001N-70PC 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:
- 70 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-70PC FAQ
1.How can I place an order for AT49F001N-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-70PC 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-70PC reliable?
The price and inventory of AT49F001N-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-70PC is usually 5 days.
3.What payment methods are accepted for AT49F001N-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-70PC?
AT49F001N-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-70PC 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-70PC?
For technical support, including AT49F001N-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-70PC requirements.
6.How does Aetrix verify that AT49F001N-70PC is sourced from the original manufacturer or authorized distributors?
All AT49F001N-70PC 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-70PC meets industry standards.
7.What is the process for return or replacement of AT49F001N-70PC?
All AT49F001N-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-70PC, 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-70PC part is unused and in its original packaging.
Return procedure for AT49F001N-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001N-70PC Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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