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Microchip Technology AT49F002NT-70PC
- Part No.:
- AT49F002NT-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002NT-70PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,323
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Product details
Overview
AT49F002NT-70PC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 70 ns read access time, sector-based architecture (16K-byte boot block + two 8K-byte parameter blocks + two main memory blocks), and hardware data protection. It operates across 0°C to 70°C, supports byte-by-byte programming (10 µs/byte typical), and delivers 50 mA active current with 100 µA CMOS standby current - used for firmware storage and boot code retention in embedded controllers.
For engineers reviewing the AT49F002NT-70PC datasheet, AT49F002NT-70PC pinout, AT49F002NT-70PC application, or AT49F002NT-70PC equivalent, key selection criteria include boot block lockout capability, 5V-only command interface, sector erase granularity, DATA polling/Toggle Bit end-of-program detection, and compatibility with standard microprocessor bus timing (CE/OE/WE control).
Technical Context
The AT49F002NT-70PC implements a command-register-based architecture requiring six-bus-cycle sequences for chip/sector erase and boot lockout enable, with address latching on falling WE/CE edges and data latching on rising edges. Its internal program control logic eliminates external high-voltage programming signals.
It features dual-mode operation: standard EPROM-like read mode (CE/OE low, WE high) and command-initiated programming/erase modes, with RESET pin enabling both system reset and 12V override of boot block lockout - a capability absent in AT49F002N(T) variants.
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 - meets timing requirements for 14 MHz Z80 or 8051 bus interfaces without wait states. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of configuration parameters or calibration data. |
| Erase Cycle Time | 10 seconds max for full chip or sector - allows predictable in-system maintenance windows. |
| 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 (3C000H–3FFFFH) with lockout enabled via 6-cycle command sequence - ensures secure bootloader persistence during field upgrades. |
| Power Dissipation | 275 mW typical at 55 ns access (5V, 5 MHz), 50 mA active / 100 µA standby - suitable for battery-backed or low-power industrial systems. |
Pinout & Package
AT49F002NT-70PC is supplied in a 32-pin, 0.600" wide plastic DIP (PDIP) package (package code 32P6), with 0.1" lead pitch and through-hole mounting. Pin 1 is index-marked; pins 16 (GND) and 32 (VCC) provide power return and supply.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A14 used for software ID mode. |
| 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 gate; controls data bus drive to prevent contention during shared-bus operation. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset & Lockout Override | Logic-high = normal operation; logic-low = outputs tri-stated; 12V pulse = unlocks boot block for reprogramming. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; carries command data, product ID codes, and memory contents during read/write cycles. |
| GND / VCC | Power Supply | Ground reference (pin 16) and 5V ±10% supply (pin 32); decoupling required within 1 cm per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for +12V or +25V programming voltage rails - simplifies power design and enables direct microcontroller interfacing. |
| Sector Architecture with Boot Lockout | Enables independent update of application code (main blocks) while preserving immutable bootloader in protected 16K region - critical for fail-safe firmware recovery. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes) - prevents accidental corruption during power transients. |
| DATA Polling & Toggle Bit | Allows host processor to poll status without halting execution or relying on fixed timeouts - improves system responsiveness during flash updates. |
| 10,000 Program/Erase Cycles | Supports long-term field deployment in applications requiring periodic firmware or parameter updates over 10+ year product lifecycles. |
Applications
| Industrial PLC Firmware Storage | Embedded Instrument Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers subject to factory reprogramming and remote updates. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into microcontroller address space; accessed via synchronous 8-bit parallel bus with CE/OE/WE handshaking. Use Value: Sector erase enables selective update of motion control algorithms without disturbing I/O driver code; boot lockout guarantees safe restart after partial update failure. | Use Scenario: Hosting secure boot code and calibration data in handheld test equipment with field-upgradable measurement firmware. IC Role / Device Role / Timing Role: Primary boot memory providing first-stage initialization code; accessed during cold start before RAM initialization. Use Value: 16K protected boot block prevents corruption during brown-out events; 70 ns access ensures fast boot times under 50 ms. |
| Medical Device Parameter Archive | Automotive ECU Configuration Storage |
Use Scenario: Retaining device-specific calibration constants, usage logs, and safety-critical thresholds in portable diagnostic tools. IC Role / Device Role / Timing Role: Parameter memory bank accessed via microcontroller SPI-to-parallel bridge or direct GPIO-controlled bus. Use Value: Two 8K parameter blocks allow A/B versioning for rollback capability; byte programming enables single-parameter edits without full sector erase. | Use Scenario: Storing vehicle-specific tuning maps and diagnostic trouble code history in engine control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Secondary nonvolatile memory supplementing main MCU flash; interfaced via dedicated address/data bus with hardware wait-state generation. Use Value: 10,000-cycle endurance supports lifetime recalibration; hardware data protection prevents corruption during load dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002T-70PC | Same density, timing, and pinout; boot block located at 3C000H–3FFFFH (vs. AT49F002N's 00000H–03FFFH); includes RESET-based boot override. | Designed for systems requiring top-address boot region and 12V unlock capability - not compatible where legacy bottom-boot layout is fixed. | Select AT49F002T-70PC when board layout reserves upper memory map for bootloader and requires field-recoverable lockout override. |
| AM29LV002BT-70JC | 32-pin PLCC package; 70 ns access; 2 Mbit; supports AMD-style command sets; no RESET-based boot override; 3V/5V tolerant inputs. | Requires different command sequences and lacks 12V RESET unlock; better suited for mixed-voltage systems but incompatible with Atmel-specific lockout workflows. | Choose AM29LV002BT-70JC only if migrating from AMD-compatible designs or requiring 3V input tolerance - not drop-in for existing AT49F002NT layouts. |
Compared with AT49F002T-70PC, the AT49F002NT-70PC shares identical boot block location and RESET override behavior; versus AM29LV002BT-70JC, it offers tighter integration with Atmel's lockout and identification protocols but lacks 3V input compatibility - making it optimal for cost-sensitive 5V-only industrial controllers.
Availability
AT49F002NT-70PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded instrument bootloaders, and medical device parameter archiving requiring stable component supply and long-lifecycle support.
Supply support for AT49F002NT-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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and security ICs for industrial, automotive, and consumer applications.
The AT49F002(N)(T) family was designed as cost-optimized, 5V-only Flash memory for embedded systems requiring in-system reprogrammability without high-voltage programming circuitry - targeting legacy 8-bit controller platforms with strict BOM constraints.
FAQ
What is the boot block address range for AT49F002NT-70PC?
The AT49F002NT-70PC uses the AT49F002(N)T variant architecture, placing its 16K-byte boot block at address range 3C000H to 3FFFFH. This top-aligned layout distinguishes it from the AT49F002N variant (00000H–03FFFH) and enables separation of bootloader from application code in upper memory space. The AT49F002NT-70PC datasheet confirms this mapping in the block diagram and sector erase command table.
Does AT49F002NT-70PC support 12V RESET-based boot block reprogramming?
Yes, AT49F002NT-70PC supports 12V ±0.5V applied to the RESET pin to override enabled boot block lockout, allowing chip/sector erase or byte programming of the protected region. This feature is explicitly documented for AT49F002(N)T devices and excluded only for AT49F002N(T) - a designation not applicable to AT49F002NT-70PC. The 12V pulse must be applied after lockout enable and before returning to TTL levels.
What are the valid package options for AT49F002NT-70PC?
AT49F002NT-70PC is specifically packaged in a 32-pin, 0.600" wide plastic DIP (PDIP) with package code 32P6. Other variants like AT49F002NT-70JC use PLCC (32J), AT49F002NT-70TC use TSOP (32T), and AT49F002NT-70VC use VSOP (32V). The "PC" suffix in AT49F002NT-70PC unambiguously denotes the PDIP package per Atmel's ordering information tables.
How does DATA polling work on AT49F002NT-70PC during byte programming?
During byte programming, AT49F002NT-70PC asserts the complement of the loaded data on I/O7; once programming completes, true data appears on all I/O lines. Host firmware reads the target address repeatedly - when I/O7 transitions from complement to true value, programming is confirmed. This mechanism avoids fixed delays and works independently of tBP (10 µs typical), enabling deterministic host-side synchronization without oscilloscope validation.
Is AT49F002NT-70PC compatible with standard EPROM read timing?
Yes, AT49F002NT-70PC operates identically to EPROMs in read mode: CE and OE low with WE high places valid data on I/O0–I/O7 within 70 ns. Its tCE (70 ns) and tOE (35 ns max) match industry-standard EPROM timing, allowing direct replacement in legacy sockets without timing adapter logic - provided VCC remains at 5V ±10% and address setup/hold times meet AC specifications.
AT49F002NT-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:
- 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49F002NT-70PC FAQ
1.How can I place an order for AT49F002NT-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002NT-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 AT49F002NT-70PC reliable?
The price and inventory of AT49F002NT-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002NT-70PC is usually 5 days.
3.What payment methods are accepted for AT49F002NT-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002NT-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002NT-70PC?
AT49F002NT-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002NT-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 AT49F002NT-70PC?
For technical support, including AT49F002NT-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002NT-70PC requirements.
6.How does Aetrix verify that AT49F002NT-70PC is sourced from the original manufacturer or authorized distributors?
All AT49F002NT-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 AT49F002NT-70PC meets industry standards.
7.What is the process for return or replacement of AT49F002NT-70PC?
All AT49F002NT-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002NT-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 AT49F002NT-70PC part is unused and in its original packaging.
Return procedure for AT49F002NT-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F002NT-70PC Tags
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