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Microchip Technology AT49F002T-70PI
- Part No.:
- AT49F002T-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002T-70PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,743
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Product details
Overview
AT49F002T-70PI 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 and supports byte-by-byte programming at 10 µs/byte typical for embedded firmware storage in microcontroller-based systems.
For engineers reviewing the AT49F002T-70PI datasheet, AT49F002T-70PI pinout, AT49F002T-70PI application, or AT49F002T-70PI equivalent, key selection considerations include its 70 ns read timing, boot block lockout capability with 12V RESET override, sector erase flexibility, CMOS standby current of 100 µA, and compatibility with standard EPROM-like bus interface (CE/OE/WE).
Technical Context
The AT49F002T-70PI implements a command-driven architecture requiring six-byte sequences for chip/sector erase and boot lockout enable, with internal program control eliminating external high-voltage requirements. Its memory map places the 16K-byte boot block at address 3C000H–3FFFFH, distinct from the AT49F002(N) variant.
It supports DATA polling (I/O7 complement) and toggle-bit detection (I/O6) for end-of-program/erase cycle verification, and integrates VCC sense, noise filtering, and control-line inhibition for hardware write protection - all operating within 5V ±10% supply without auxiliary voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - sufficient for full bootloader + configuration data in resource-constrained systems. |
| Read Access Time | 70 ns maximum - enables direct interfacing with 14 MHz+ microcontrollers without wait states. |
| Byte Programming Time | 10 µs typical - allows rapid field updates of small firmware patches or parameter sets. |
| Erase Cycle Time | 10 seconds maximum for full chip or sector - supports in-system maintenance without external programmers. |
| Endurance | 10,000 program/erase cycles - validated for long-term use in industrial firmware update cycles. |
| Standby Current | 100 µA CMOS - critical for low-power modes in battery-backed or energy-sensitive applications. |
| Operating Voltage | 5V ±10% - single-supply operation simplifies power design versus mixed-voltage Flash devices. |
Pinout & Package
AT49F002T-70PI is supplied in a 32-pin, 0.600" wide plastic dual inline package (PDIP), with 32P6 footprint. Pin 1 is index-marked; pins 1 and 32 are VCC and GND respectively. Pin 9 is NC (not connected) per AT49F002N(T) specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A17 selects upper memory bank. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; supports byte-wide reads/writes and DATA polling on I/O7/I/O6. |
| 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 | Active-low reset; when pulled to 12V, overrides boot block lockout - unique to T-suffix variants. |
| GND / VCC | Power Supply | Ground and 5V supply pins; decoupling required near VCC for stable read/write timing. |
| DC | No Connect | Pin 9 is unconnected - must remain floating; not tied to VCC/GND or driven. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16K-byte boot block (3C000H–3FFFFH) can be permanently write-protected via command sequence; prevents accidental corruption of bootloader code. |
| 12V RESET Override | Applying 12V ±0.5V to RESET pin temporarily disables boot lockout - enables recovery of protected sectors without device replacement. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and multi-control-line inhibit (OE low/CE high/WE high) prevent spurious writes. |
| Two End-of-Operation Detection Methods | DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) provide flexible, software-controllable confirmation of program/erase completion. |
| Standard EPROM Interface | Uses CE/OE/WE control logic identical to EPROMs - allows drop-in replacement in legacy designs without bus controller changes. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating firmware images and calibration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program storage with in-system reprogrammability; 70 ns read access ensures real-time instruction fetch during scan cycles. Use Value: Sector erase enables selective update of logic routines without erasing safety-critical boot code, reducing downtime during field upgrades. | Use Scenario: Holding device-specific configuration parameters (e.g., sensor offsets, alarm thresholds) in portable diagnostic equipment requiring regulatory-compliant data integrity. IC Role / Device Role / Timing Role: Secure parameter storage with hardware-enforced write protection; boot block lockout prevents unauthorized modification of FDA-approved startup routines. Use Value: 12V RESET override allows authorized service personnel to recover corrupted configuration while maintaining locked bootloader compliance. |
| Automotive Body Control Module | Telecom Remote Node Bootloader |
Use Scenario: Hosting bootloader and feature-enabling keys in body control units where ECU firmware must survive vehicle battery disconnects. IC Role / Device Role / Timing Role: Reliable, low-power nonvolatile memory; 100 µA standby current minimizes parasitic drain on 12V battery during sleep mode. Use Value: Hardware data protection (VCC sense, noise filtering) prevents inadvertent writes during electrical transients common in automotive CAN networks. | Use Scenario: Storing secure boot code and encrypted firmware decryption keys in remote base station nodes requiring over-the-air (OTA) updates. IC Role / Device Role / Timing Role: Trusted execution root memory; boot block lockout ensures immutable first-stage loader integrity before OTA payload validation. Use Value: Dual detection (DATA polling + toggle bit) enables robust timing-independent status checking in latency-sensitive OTA update protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002T-70JC | Same die, PLCC-32 package instead of PDIP; 32J footprint with J-leads and different thermal/mounting characteristics. | Preferred for surface-mount PCBs with space constraints and automated assembly; requires reflow-compatible layout. | Select when board-level automation, thermal cycling resilience, or smaller footprint outweighs through-hole mechanical stability. |
| AT49F002NT-70PI | Includes NC pin functionality on RESET (no 12V override); otherwise identical timing, density, and sector map. | Lacks boot block recovery path - unsuitable for applications requiring field-recoverable protected sectors. | Choose only if boot block is never expected to require post-deployment modification and cost sensitivity favors N-suffix variant. |
Compared with AT49F002T-70JC, the AT49F002T-70PI offers through-hole mechanical robustness and simplified prototyping; compared with AT49F002NT-70PI, it uniquely supports 12V RESET override - a critical differentiator for field-serviceable embedded systems requiring guaranteed boot block recovery.
Availability
AT49F002T-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, long-lifecycle support, and verified Flash endurance.
Supply support for AT49F002T-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 embedded systems.
The AT49F002T series belongs to Atmel's 5V-only Flash memory product line, designed specifically for in-system reprogrammability in microcontroller-based applications where reliability, sector-level erase control, and hardware write protection are essential.
FAQ
What is the memory organization of the AT49F002T-70PI?
The AT49F002T-70PI contains 2 Mbit (256K × 8) of Flash memory, organized as 262,144 words by 8 bits. Its sector architecture comprises one 16K-byte boot block (address range 3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). This structure is explicitly defined for the AT49F002T variant in the datasheet's memory map and block diagram sections.
Does the AT49F002T-70PI support 12V programming or reset override?
Yes - the AT49F002T-70PI supports 12V ±0.5V applied to the RESET pin to override the boot block programming lockout feature. This allows reprogramming of the protected boot sector after lockout has been enabled. The AT49F002N(T) and AT49F002NT variants do not support this function, confirming the 12V override is specific to the T-suffix family including the AT49F002T-70PI.
What is the purpose of the NC (No Connect) pin on the AT49F002T-70PI?
Pin 9 on the AT49F002T-70PI (PDIP package) is designated NC (No Connect) and must remain unconnected - neither tied to VCC nor GND nor driven by external circuitry. This is explicitly stated in the datasheet for AT49F002N(T) variants, and the AT49F002T-70PI falls under that designation. Connecting or driving this pin may cause undefined behavior or damage.
How does the AT49F002T-70PI detect end-of-program or end-of-erase operations?
The AT49F002T-70PI provides two independent hardware methods: DATA polling (reading the last programmed byte returns its complement on I/O7 until completion) and toggle-bit detection (I/O6 toggles between 0 and 1 during operation and stabilizes upon completion). Both are fully supported per the AC timing and waveform specifications in the datasheet and require no external components.
Is the AT49F002T-70PI compatible with standard EPROM interfaces?
Yes - the AT49F002T-70PI uses identical CE, OE, and WE control signaling as standard EPROMs, enabling direct replacement in existing designs without bus controller modifications. Its read cycle behaves identically: data appears on I/O0–I/O7 when CE and OE are low and WE is high. This compatibility is confirmed in the "Device Operation" and "READ" sections of the datasheet.
AT49F002T-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
AT49F002T-70PI FAQ
1.How can I place an order for AT49F002T-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002T-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 AT49F002T-70PI reliable?
The price and inventory of AT49F002T-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002T-70PI is usually 5 days.
3.What payment methods are accepted for AT49F002T-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002T-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002T-70PI?
AT49F002T-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002T-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 AT49F002T-70PI?
For technical support, including AT49F002T-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002T-70PI requirements.
6.How does Aetrix verify that AT49F002T-70PI is sourced from the original manufacturer or authorized distributors?
All AT49F002T-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 AT49F002T-70PI meets industry standards.
7.What is the process for return or replacement of AT49F002T-70PI?
All AT49F002T-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002T-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 AT49F002T-70PI part is unused and in its original packaging.
Return procedure for AT49F002T-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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