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Microchip Technology AT49F001-70PI
- Part No.:
- AT49F001-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F001-70PI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,257
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Product details
Overview
AT49F001-70PI 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/byte typical 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 AT49F001-70PI datasheet, AT49F001-70PI pinout, AT49F001-70PI application, or AT49F001-70PI 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 end-of-program detection, and compatibility with standard EPROM read timing interfaces.
Technical Context
The AT49F001-70PI implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot-lock enable. Its memory is partitioned into one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB), enabling selective erasure and secure firmware storage.
It operates using standard CE/OE/WE control logic identical to EPROMs, supports hardware reset for operation abort, and includes VCC sense, noise filtering, and input-level inhibition to prevent inadvertent writes. The RESET pin is DC on this variant and does not support 12V override for boot-block reprogramming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - directly replaces 27C010 EPROMs in legacy designs. |
| Read Access Time | 70 ns maximum - ensures compatibility with 14 MHz Z80, 8051, and 68K bus cycles without wait states. |
| Byte Programming Time | 10 µs typical - enables fast field updates of configuration or calibration data without system interruption. |
| Chip Erase Time | 10 seconds - allows full memory reset during manufacturing or recovery without external high-voltage equipment. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed timing delays in host firmware. |
| Power Dissipation | 275 mW active (50 mA @ 5.5 V), 100 µA CMOS standby - suitable for low-power industrial controllers with battery backup. |
| Endurance | 10,000 program/erase cycles - supports firmware update logging and parameter tuning over product lifetime. |
Pinout & Package
AT49F001-70PI is supplied in a 32-lead plastic dual in-line package (PDIP), 0.600" wide (32P6), with standard through-hole mounting and JEDEC MS-001 compliance.
| 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 compatible with 8-bit microcontrollers; 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 control; used with CE to prevent bus contention during shared-memory operation. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | DC pin (no 12V override); halts ongoing program/erase and forces outputs to high-Z on logic low. |
| VCC | Power Supply | +5.0 V ±10% supply; internal regulation enables stable operation across voltage tolerance. |
| GND | Ground Reference | Signal and power ground reference; decoupling capacitor required within 1 cm of VCC pin. |
| NC | No Connect | Pin 32 (DIP package) is unconnected - must remain floating per datasheet; no PCB trace or pull-up/down. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16 KB boot sector (00000H–03FFFH) can be permanently write-protected via command sequence to safeguard bootloader code. |
| 5V-Only Reprogrammability | Eliminates need for +12V or +21V programming supplies - simplifies system power design and enables in-circuit updates. |
| Hardware Data Protection | VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock prevent accidental writes. |
| Fast Sector Erase Capability | Enables independent erasure of 8 KB parameter blocks - ideal for storing calibrated sensor offsets or user preferences. |
| Standard EPROM-Compatible Interface | Uses CE/OE/WE timing identical to 27C010 - allows drop-in replacement without logic or timing redesign. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Code Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed 10,000-cycle endurance and 0°C to 70°C commercial temperature rating. Use Value: Enables field firmware upgrades without removing the module; boot-block protection prevents corruption of core runtime engine. |
Use Scenario: Replacing obsolete 27C010 EPROMs in 8-bit embedded systems (e.g., Z80- or 8051-based instrumentation). IC Role / Device Role / Timing Role: Pin-compatible Flash memory providing 70 ns read access and standard CE/OE/WE control. Use Value: Eliminates UV-eraser dependency and supports in-system reprogramming during production test or calibration. |
| Embedded System Configuration Storage | Bootloader-Protected Secure Boot |
Use Scenario: Holding device-specific calibration coefficients, serial numbers, and network settings in medical diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block (two 8 KB sections) used for field-writable data storage with sector-level erase granularity. Use Value: Allows individual parameter updates without erasing application code; DATA polling confirms write completion for robust logging. |
Use Scenario: Securing boot firmware in safety-critical devices where unauthorized modification must be physically prevented. IC Role / Device Role / Timing Role: Boot block (16 KB) programmed once and locked via command sequence; RESET pin is DC only (no 12V override). Use Value: Prevents malicious or accidental overwrite of bootloader; lock status detectable via software read at address 00002H. |
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 (no sector erase). | Not suitable for secure bootloader storage; requires full-chip erase for any update. | Select only if boot protection is unnecessary and legacy AT29C command compatibility is required. |
| SST39VF010-70-4C-NHE | 1 Mbit, 70 ns, 3.3 V operation (not 5 V); includes single-byte write and uniform 4 KB sectors. | Requires level-shifting for 5 V systems; incompatible voltage domain precludes direct replacement. | Choose only for new 3.3 V designs; not a functional substitute for AT49F001-70PI in 5 V systems. |
Compared with AT29C010A-70PU and SST39VF010-70-4C-NHE, the AT49F001-70PI uniquely delivers 5V-only operation with dedicated boot-block lockout and true sector erase - making it the only option among the three for secure, field-upgradable firmware in legacy 5 V embedded platforms.
Availability
AT49F001-70PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller code memory, and embedded system configuration storage requiring stable component supply across extended product lifecycles.
Supply support for AT49F001-70PI 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 AT49F series Flash memories, including long-term supply assurance and technical documentation.
The AT49F001 product line was designed specifically for 5V embedded systems needing EPROM-compatible, in-system reprogrammable nonvolatile memory with secure boot capabilities and industrial-grade reliability.
FAQ
What is the pin 1 identifier and package type for AT49F001-70PI?
The AT49F001-70PI uses a 32-lead plastic dual in-line package (PDIP), 0.600" wide (32P6). Pin 1 is located at the left end of the top row, marked by a notch or dot on the package body. Pin 32 is NC (no connect) and must remain unconnected on the PCB.
Does AT49F001-70PI support 12V RESET override for boot-block reprogramming?
No. The AT49F001-70PI is the "N" variant (AT49F001N-70PI), and its RESET pin is DC-only - it does not support 12V override for boot-block reprogramming. This capability is reserved for the "T" variant (AT49F001T) only.
What is the boot block address range and lockout behavior for AT49F001-70PI?
The AT49F001-70PI (N variant) has a 16 KB boot block spanning addresses 00000H to 03FFFH. Once the boot block lockout feature is enabled via the six-byte command sequence, the contents become permanently immutable under 5.5 V operation - no erase or program commands affect this region.
How is end-of-program detected on AT49F001-70PI without fixed timing delays?
The AT49F001-70PI supports two hardware methods: DATA polling (read last programmed byte - I/O7 returns complement until complete) and Toggle Bit (I/O6 toggles during operation, stops when complete). Both allow host firmware to poll asynchronously and proceed immediately upon confirmation.
Can AT49F001-70PI be used as a direct replacement for 27C010 EPROMs?
Yes. The AT49F001-70PI uses identical CE/OE/WE timing, pinout, and 5V operation as the 27C010. It requires no hardware changes - only firmware updates to implement command sequences for programming and erase operations instead of UV erasure.
AT49F001-70PI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F001-70PI FAQ
1.How can I place an order for AT49F001-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001-70PI 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 AT49F001-70PI reliable?
The price and inventory of AT49F001-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001-70PI is usually 5 days.
3.What payment methods are accepted for AT49F001-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001-70PI?
AT49F001-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001-70PI 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 AT49F001-70PI?
For technical support, including AT49F001-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001-70PI requirements.
6.How does Aetrix verify that AT49F001-70PI is sourced from the original manufacturer or authorized distributors?
All AT49F001-70PI 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 AT49F001-70PI meets industry standards.
7.What is the process for return or replacement of AT49F001-70PI?
All AT49F001-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001-70PI, 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 AT49F001-70PI part is unused and in its original packaging.
Return procedure for AT49F001-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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