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Microchip Technology AT49F002N-70PI
- Part No.:
- AT49F002N-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002N-70PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,725
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Product details
Overview
AT49F002N-70PI from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 70 ns read access time, 10 µs typical byte programming, and sector-based architecture including a 16K-byte boot block with programmable lockout. It operates across 0°C to 70°C and delivers 50 mA active current and 100 µA CMOS standby current, used for firmware storage in embedded microcontroller systems.
For engineers reviewing the AT49F002N-70PI datasheet, AT49F002N-70PI pinout, AT49F002N-70PI application, or AT49F002N-70PI equivalent, this page provides verified technical context, pin-level circuit roles, sector erase behavior, boot-block protection logic, and real-world design implications for industrial firmware update architectures.
Technical Context
The AT49F002N-70PI implements a command-driven Flash architecture using standard CE/OE/WE control lines-no high-voltage programming required. Its internal program controller manages byte-by-byte writes and software-triggered sector or chip erase cycles, with DATA polling (I/O7 complement) and toggle-bit (I/O6) methods for cycle completion detection.
Memory is partitioned into five sectors: one 16K-byte boot block (00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). Boot block lockout is enabled via a six-cycle command sequence; once activated, reprogramming requires 12V on RESET-a feature absent in the AT49F002N(T) variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits - supports full firmware image storage for 8-bit microcontrollers. |
| Read Access Time | 70 ns max - enables direct execution from Flash (XIP) in timing-critical 5 MHz bus systems. |
| Byte Programming Time | 10 µs typical - allows rapid field updates of configuration data without system interruption. |
| Erase Cycle Time | 10 seconds max for full chip - deterministic timing simplifies host firmware timeout handling. |
| End-of-Write Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6) - eliminates need for fixed delay loops in bootloader code. |
| Boot Block Protection | 16K-byte sector (00000H–03FFFH) with lockout enable/disable via command sequence - secures boot code integrity during field upgrades. |
| Power Dissipation | 275 mW typical at 55 ns access (5V, commercial temp) - compatible with thermally constrained PCB layouts. |
Pinout & Package
AT49F002N-70PI is supplied in a 32-pin, 0.600" wide plastic dual inline package (PDIP), designated 32P6 per Atmel's ordering guide. Pin 1 is index-marked; pin 32 is VCC; pins 16 and 32 are power rails; pin 17 is GND.
| 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; latched on rising edge of WE/CE during programming; tri-stated 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; inhibits programming if held high. |
| OE | Output Enable | Active-low output gate; controls data bus drive; high-Z state prevents bus contention during multi-device sharing. |
| WE | Write Enable | Active-low write strobe; initiates command latching on falling edge; combined with CE defines bus cycle type (read/write/erase). |
| RESET | Hardware Reset Input | Active-low reset halts ongoing operations and forces high-Z outputs; 12V override enables boot block reprogramming (not available on AT49F002N(T)). |
| VCC | Power Supply | +5V ±10% supply; powers core logic and I/O buffers; decoupling required within 1 cm of pin 32. |
| GND | Ground Reference | Signal and power ground reference; connected to pin 16; must be low-inductance path to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for +12V programming voltage - reduces BOM count and simplifies power design in embedded systems. |
| Sector Erase Architecture | Enables selective erasure of boot, parameter, or main memory blocks - preserves critical firmware while updating application code. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition prevent accidental writes. |
| CMOS Standby Current | 100 µA max at 0°C–70°C - suitable for battery-backed systems requiring low-quiescent power during sleep modes. |
| 10,000 Write/Erase Cycles | Guaranteed endurance supports long-term field deployment in industrial controllers with periodic firmware updates. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Stores boot loader and application firmware in programmable logic controllers with field-upgrade capability via RS-485. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to microcontroller address space; 70 ns access enables zero-wait-state execution. Use Value: Sector architecture allows safe in-field updates: boot block remains locked while main memory is erased/reprogrammed without system downtime. |
Use Scenario: Retains calibrated sensor parameters and safety-critical startup routines in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block (8K × 2) stores calibration coefficients; boot block (16K) holds certified boot code verified at power-on. Use Value: Hardware lockout prevents unauthorized modification of FDA-approved boot routines; DATA polling ensures deterministic update timing for audit logs. |
| Automotive Body Control Module | Networking Equipment Boot ROM |
Use Scenario: Holds vehicle-specific configuration tables and CAN protocol stacks in body control units subject to ECU reflashing. IC Role / Device Role / Timing Role: Main memory blocks store updatable feature sets; RESET pin 12V override allows factory reprogramming of locked boot code. Use Value: 10,000-cycle endurance meets automotive lifecycle requirements; 50 mA active current stays within BCM power budget limits. |
Use Scenario: Serves as primary boot ROM for Ethernet switch ASICs, loading initial firmware before DRAM initialization. IC Role / Device Role / Timing Role: Read-only boot block (00000H–03FFFH) contains secure bootstrap loader; accessed at power-up before peripheral initialization. Use Value: 70 ns tACC ensures fast boot sequence; CMOS standby current <100 µA minimizes power draw during device idle states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002N-70JC | Same die, PLCC-32 package (32J); 1.27 mm pitch; surface-mount compatible | Preferred for automated SMT assembly; requires different footprint and reflow profile vs. through-hole PDIP | Select when board space is constrained and reflow capability exists; pinout identical but mechanical mounting differs. |
| AT49F002T-70PI | Different boot block location (3C000H–3FFFFH); no RESET 12V override; same timing and voltage specs | Used where boot code resides at top of address space; lacks field-recovery capability for locked boot sectors | Choose only if legacy design uses top-aligned boot region and 12V override is unnecessary; not drop-in due to address map change. |
Compared with AT49F002N-70PI, the AT49F002N-70JC offers identical electrical behavior in a surface-mount package for higher-density layouts, while the AT49F002T-70PI shifts boot sector addressing and removes 12V RESET recovery-making it unsuitable for designs requiring post-lockout boot code correction.
Availability
AT49F002N-70PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply and long-lifecycle support.
Supply support for AT49F002N-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, nonvolatile memory, and security ICs for industrial and automotive markets.
The AT49F002N series belongs to Atmel's 5V Flash memory product line, designed specifically for in-system reprogrammability in resource-constrained embedded systems requiring reliable firmware storage without external high-voltage circuitry.
FAQ
What is the boot block address range for AT49F002N-70PI?
The boot block for AT49F002N-70PI occupies addresses 00000H to 03FFFH (16K bytes). This is fixed for the AT49F002N variant and differs from the AT49F002T, which places the boot block at 3C000H–3FFFFH. The AT49F002N-70PI datasheet confirms this mapping in the block diagram and sector erase command table.
Does AT49F002N-70PI support 12V RESET override for boot block reprogramming?
Yes, AT49F002N-70PI supports 12V ±0.5V applied to the RESET pin to override boot block lockout and enable reprogramming-even after lockout activation. This feature is explicitly documented in the "Boot Block Programming Lockout Override" section and is absent in AT49F002N(T) variants.
What is the maximum erase time for a full chip erase on AT49F002N-70PI?
The maximum erase time for a full chip erase on AT49F002N-70PI is 10 seconds, as specified in the "AC Characteristics" table under tEC. This value is guaranteed across the commercial temperature range (0°C to 70°C) and applies whether boot block lockout is enabled or disabled.
How does DATA polling work on AT49F002N-70PI during byte programming?
During byte programming, AT49F002N-70PI asserts the complement of the loaded data on I/O7. Once programming completes, true data appears on all I/O lines. This allows host firmware to poll I/O7 without fixed delays-reducing boot time uncertainty and improving update reliability in AT49F002N-70PI-based systems.
Is AT49F002N-70PI pin-compatible with AT49F002-70PI?
No, AT49F002N-70PI is not pin-compatible with AT49F002-70PI. While both use the 32P6 PDIP package and share identical pin functions, the AT49F002N variant includes the RESET pin functionality and boot block lockout features absent in the base AT49F002. Electrical and timing specs match, but firmware interaction differs.
AT49F002N-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
AT49F002N-70PI FAQ
1.How can I place an order for AT49F002N-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002N-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 AT49F002N-70PI reliable?
The price and inventory of AT49F002N-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002N-70PI is usually 5 days.
3.What payment methods are accepted for AT49F002N-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002N-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002N-70PI?
AT49F002N-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002N-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 AT49F002N-70PI?
For technical support, including AT49F002N-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002N-70PI requirements.
6.How does Aetrix verify that AT49F002N-70PI is sourced from the original manufacturer or authorized distributors?
All AT49F002N-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 AT49F002N-70PI meets industry standards.
7.What is the process for return or replacement of AT49F002N-70PI?
All AT49F002N-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002N-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 AT49F002N-70PI part is unused and in its original packaging.
Return procedure for AT49F002N-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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