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Microchip Technology AT49F002-70PI
- Part No.:
- AT49F002-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002-70PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,346
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Product details
Overview
AT49F002-70PI from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 70 ns read access time, 10 µs/byte typical programming, 10-second chip erase, 10,000 write cycles, and features hardware data protection with boot block lockout - deployed in industrial control firmware storage and BIOS update modules.
For engineers reviewing the AT49F002-70PI datasheet, AT49F002-70PI pinout, AT49F002-70PI application, or AT49F002-70PI equivalent, key selection criteria include its 70 ns read timing, sector-based erase architecture (16K boot + dual 8K parameter + dual main blocks), CMOS standby current of 100 µA, RESET-enabled boot override, and compatibility with standard microprocessor bus interfaces using CE/OE/WE control.
Technical Context
The AT49F002-70PI implements a command-register-based Flash architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its internal program timer eliminates external timing components, and DATA polling (I/O7 complement) or toggle-bit (I/O6) detection confirms operation completion without polling overhead.
It supports three operating modes: Read (CE/OE low, WE high), Program/Erase (CE low, OE high, WE low), and Standby (CE high). The RESET pin enables system-level reset and - when driven to 12 V - overrides boot block lockout, a feature absent in N(T) variants. Boot block address mapping differs between AT49F002(N) (00000–03FFF) and AT49F002(N)T (3C000–3FFFF); AT49F002-70PI belongs to the base AT49F002 family with 00000–03FFF boot range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - sufficient for full firmware images in 8-bit/16-bit MCU systems. |
| Read Access Time | 70 ns max - meets timing requirements for 14 MHz Z80 or 20 MHz 8051 bus interfaces without wait states. |
| Byte Programming Time | 10 µs typical (50 µs max) - enables fast field updates of configuration parameters or calibration data. |
| Erase Cycle Time | 10 seconds max for full chip erase - deterministic internal timing avoids external watchdog coordination. |
| End-of-Operation Detection | DATA polling (I/O7 complement) or toggle-bit (I/O6) - allows real-time status monitoring without dedicated status registers. |
| Boot Block Protection | 16K-byte sector (00000–03FFF) with lockout via 6-byte command sequence - prevents accidental overwrite of bootloader code. |
| Power Dissipation | 50 mA active current / 100 µA CMOS standby - suitable for low-power industrial controllers with sleep/wake cycles. |
Pinout & Package
AT49F002-70PI is supplied in a 32-pin, 0.600" wide plastic DIP (PDIP) package (package code P6), with 0.1" lead pitch and through-hole mounting. Pin 1 is marked by a notch or dot; pin 16 is GND and pin 32 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A15 used for byte selection within 64K pages. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8-bit microcontrollers; high-impedance during deselect or reset. |
| CE | Chip Enable | Active-low chip select; must be low for read/write; enables bus sharing with other peripherals on same data/address lines. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during read operations. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing. |
| RESET | Reset Input | Active-low system reset; drives outputs to high-Z; 12 V input overrides boot lockout - critical for recovery firmware updates. |
| DC | No Connect | Pin 1 on DIP package is unconnected - must be left floating or tied to ground per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for +12V programming voltage - simplifies power design and enables in-system reprogramming via standard logic rails. |
| Sector Architecture with Boot Lockout | 16K boot block + dual 8K parameter blocks + dual main memory blocks (96K/128K) - enables secure bootloader storage and modular firmware partitioning. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low/CE high/WE high blocks writes) - prevents spurious writes during power transients. |
| DATA Polling & Toggle Bit | Real-time operation status via I/O7 complement or I/O6 toggling - removes dependency on fixed delay loops or external timers in host firmware. |
| 12V RESET Override | Applying 12 V ±0.5 V to RESET pin unlocks boot block for erase/program even after lockout - provides guaranteed recovery path for corrupted firmware. |
Applications
| Industrial PLC Firmware Storage | Embedded BIOS Update Module |
|---|---|
Use Scenario: Storing ladder logic programs and I/O configuration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with 70 ns read access enabling real-time scan-cycle execution; boot block holds safety-critical startup routines. Use Value: 10,000 write cycles and 100 µA standby current support long-term field deployment with infrequent firmware updates and low energy consumption during idle periods. |
Use Scenario: Hosting boot firmware and hardware initialization code in x86-compatible embedded motherboards requiring field-upgradable BIOS. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; 16K boot block protected against accidental overwrite ensures reliable cold-start behavior. Use Value: 12V RESET override enables forced reprogramming of locked boot sector during BIOS recovery - eliminating need for external programmers in service depots. |
| Medical Device Configuration Memory | Automotive ECU Calibration Storage |
Use Scenario: Retaining user-adjustable therapy parameters and device calibration constants in portable diagnostic equipment with battery-backed operation. IC Role / Device Role / Timing Role: Parameter storage with dual 8K parameter blocks allowing A/B versioning; sector erase enables safe overwriting without disturbing operational code. Use Value: Hardware data protection (VCC sense, noise filtering) prevents corruption during brown-out events common in battery-powered medical devices. |
Use Scenario: Storing engine calibration maps and sensor compensation coefficients in automotive engine control units subject to wide temperature ranges. IC Role / Device Role / Timing Role: Nonvolatile data storage rated for -40°C to +85°C industrial operation; 10-second erase supports rapid recalibration during vehicle service. Use Value: 50 mA active current and 70 ns access meet stringent ECU timing budgets while maintaining compatibility with 5V CAN/LIN subsystem power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV002BT-70EC | 3V/5V dual-voltage operation; 70 ns access; 16K boot sector; no 12V RESET override. | Lacks hardware boot unlock - requires full chip erase to recover locked boot code. | Select when system already supports 3V logic or needs lower active power; avoid if guaranteed boot recovery is required. |
| SST39VF020-70-4C-NHE | 3.3V only; 70 ns access; 8K boot sector; TTL-compatible inputs; no RESET pin. | Missing RESET functionality and boot override - limits use in systems requiring field-recoverable bootloaders. | Prefer for cost-sensitive 3.3V designs where boot protection is managed in software; not drop-in compatible due to voltage and pinout differences. |
Compared with AM29LV002BT-70EC and SST39VF020-70-4C-NHE, the AT49F002-70PI uniquely combines 5V-only simplicity, deterministic 10-second erase, and 12V RESET-based boot recovery - making it optimal for industrial systems where firmware integrity and field serviceability are prioritized over multi-voltage flexibility.
Availability
AT49F002-70PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded BIOS update modules, medical device configuration memory, automotive ECU calibration storage, and legacy 5V microcontroller boot applications requiring stable component supply and long-lifecycle support.
Supply support for AT49F002-70PI 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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49F002 product line was designed as a 5V-only, in-system reprogrammable Flash memory solution targeting cost-sensitive embedded systems requiring robust firmware storage with hardware-enforced boot protection and field-upgrade capability.
FAQ
What is the memory organization of the AT49F002-70PI?
The AT49F002-70PI contains 2 Mbit (262,144 × 8) of Flash memory organized as 256K words × 8 bits. Its sector architecture comprises one 16K-byte boot block (address 00000–03FFF), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This layout supports secure bootloader storage and modular firmware updates. The AT49F002-70PI uses this exact configuration as specified in Atmel's datasheet Rev. 1017D.
Does the AT49F002-70PI support 3V operation?
No, the AT49F002-70PI is a 5V-only Flash memory device. It requires VCC = 5V ±10% and does not support 3V or mixed-voltage operation. Its command set, timing, and hardware protection circuits (e.g., VCC sense threshold at ~3.8V) are designed exclusively for 5V systems. Using the AT49F002-70PI outside its 5V specification risks failed programming or data corruption.
How is boot block protection enabled and overridden on the AT49F002-70PI?
Boot block protection on the AT49F002-70PI is enabled via a six-byte command sequence (AAh, 55h, 80h, AAh, 55h, 40h) written to address 5555h. Once enabled, the 16K boot block (00000–03FFF) becomes permanently write-protected at ≤5.5V. To override, apply 12.0V ±0.5V to the RESET pin - a feature unique to the base AT49F002 series and present on the AT49F002-70PI.
What package type is used for the AT49F002-70PI?
The AT49F002-70PI uses a 32-pin, 0.600" wide plastic dual in-line package (PDIP), designated as package code P6. It has through-hole mounting, 0.1" lead pitch, and pin 1 identified by a notch or dot. This package is RoHS-compliant and rated for commercial temperature operation (0°C to +70°C), matching the "-70" speed grade and "-PI" suffix in the AT49F002-70PI ordering code.
Can the AT49F002-70PI be used interchangeably with the AT49F002N-70PI or AT49F002T-70PI?
No - the AT49F002-70PI is not interchangeable with AT49F002N-70PI or AT49F002T-70PI. The "N" variant lacks the RESET pin functionality entirely; the "T" variant relocates the boot block to address 3C000–3FFFF and omits RESET-based override. Only the base AT49F002-70PI provides the 00000–03FFF boot block with 12V RESET override, as confirmed in Atmel's ordering information and functional descriptions.
AT49F002-70PI 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:
- 2Mbit
- Memory Organization:
- 256K 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
AT49F002-70PI FAQ
1.How can I place an order for AT49F002-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002-70PI 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 AT49F002-70PI reliable?
The price and inventory of AT49F002-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002-70PI is usually 5 days.
3.What payment methods are accepted for AT49F002-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002-70PI?
AT49F002-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002-70PI 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 AT49F002-70PI?
For technical support, including AT49F002-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002-70PI requirements.
6.How does Aetrix verify that AT49F002-70PI is sourced from the original manufacturer or authorized distributors?
All AT49F002-70PI 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 AT49F002-70PI meets industry standards.
7.What is the process for return or replacement of AT49F002-70PI?
All AT49F002-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002-70PI, 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 AT49F002-70PI part is unused and in its original packaging.
Return procedure for AT49F002-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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