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Microchip Technology AT49F002T-70PC
- Part No.:
- AT49F002T-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49F002T-70PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,686
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Product details
Overview
AT49F002T-70PC from Atmel is a 5V-only, 2 Mbit (256K × 8) in-system reprogrammable Flash memory IC with 70 ns read access time, 10 µs/byte typical programming time, 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 and boot code retention in embedded controllers.
For engineers reviewing the AT49F002T-70PC datasheet, AT49F002T-70PC pinout, AT49F002T-70PC application, or AT49F002T-70PC equivalent, key selection criteria include boot block protection behavior under 5.5 V, sector erase granularity (parameter blocks at 3A000–3BFFF and 38000–39FFF), RESET-pin override capability at 12 V, and compatibility with standard microprocessor bus timing (CE/OE/WE control).
Technical Context
The AT49F002T-70PC implements a command-register-based architecture requiring six-byte sequences for chip/sector erase and boot lockout enable. Its memory map allocates the 16K-byte boot block to address range 3C000–3FFFFH-distinct from the AT49F002(N) version-and supports DATA polling (I/O7 complement) and toggle-bit detection (I/O6) for program/erase cycle completion.
Hardware data protection includes VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored on WE/CE), and control-line inhibition (OE low, CE high, or WE high blocks writes). The RESET pin enables both system reset and 12 V–triggered boot block override-functionality absent in the N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), organized as 256K words × 8 bits |
| Read Access Time | 70 ns maximum-defines minimum bus cycle time for reliable read operations |
| Byte Programming Time | 10 µs typical-enables rapid field updates without external timing circuitry |
| Erase Cycle Time | 10 seconds max for full chip or sector-supports in-system reprogramming without socket removal |
| Boot Block Size & Location | 16K bytes at 3C000H–3FFFFH-holds secure boot code with optional permanent lockout |
| Power Dissipation | 275 mW typical at 55 ns access (5 V, 5 MHz)-compatible with thermally constrained PCB layouts |
| Endurance | 10,000 write/erase cycles-validated for long-term firmware update deployments |
Pinout & Package
AT49F002T-70PC is supplied in a 32-pin, 0.600" wide plastic dual inline package (PDIP), designated 32P6 per Atmel's ordering matrix. Pin 1 is index-marked; pins 1–16 and 17–32 are arranged on opposing sides with GND (pin 16) and VCC (pin 32) placed for decoupling proximity.
| 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 |
| CE | Chip Enable | Active-low chip select-must be low with OE low and WE high for valid read output |
| OE | Output Enable | Active-low output gate-controls data bus contention; high-Z when deasserted |
| WE | Write Enable | Active-low write strobe-latches address/data during command sequences and byte programming |
| RESET | Reset & Override Control | Logic-high = normal operation; 12 V pulse enables boot block reprogramming even when lockout is active |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface-carries command data, product ID codes, and memory contents |
| GND | Ground Reference | Pin 16-primary return path for power and signal currents; requires local decoupling |
| VCC | Power Supply | Pin 32-5 V ±10% supply; must be stabilized to <3.8 V threshold to prevent spurious programming |
Key Features
| Feature | Design Value |
|---|---|
| Single 5 V supply operation | Eliminates need for +12 V programming voltage-simplifies power design and enables direct microcontroller interfacing |
| Boot block programming lockout | Prevents accidental overwrite of critical boot code; enabled via 6-cycle command sequence; lockout persists at ≤5.5 V |
| Hardware data protection | Combines VCC sensing, noise filtering, and control-line interlock to prevent unintended writes during power transients or EMI events |
| DATA polling & toggle-bit detection | Enables software-driven timing of program/erase completion without fixed delays-reduces worst-case latency by >50% |
| Sector architecture | Independent erasure of two 8K parameter blocks (3A000–3BFFF, 38000–39FFF) and two main memory blocks-minimizes update downtime |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing fast 70 ns read access for real-time instruction fetch and byte-level reprogramming for field updates. Use Value: Sector erase capability allows parameter block updates without disturbing main firmware, reducing maintenance downtime by enabling partial reflash. | Use Scenario: Securing boot loader code in FDA-cleared diagnostic equipment where runtime integrity and update auditability are mandatory. IC Role / Device Role / Timing Role: Trusted boot memory with hardware-enforced lockout-ensures boot code remains unaltered unless explicitly overridden via 12 V RESET pulse. Use Value: Prevents unauthorized modification of startup routines while permitting controlled updates during certified service procedures. |
| Telecom Base Station Configuration | Automotive Infotainment System Updates |
Use Scenario: Holding calibration data, feature licenses, and protocol stacks in cellular baseband units operating across extended temperature ranges. IC Role / Device Role / Timing Role: Parameter block storage (two 8K sections) for field-upgradable settings-accessed via standard microprocessor bus with CE/OE/WE control. Use Value: Independent erasure of parameter blocks enables carrier-specific configuration changes without full firmware reload, accelerating deployment cycles. | Use Scenario: Managing over-the-air (OTA) software updates in head unit ECUs where boot partition integrity must survive power loss during flash operations. IC Role / Device Role / Timing Role: Dual-block main memory (96K + 128K) supporting A/B partitioning-allows validated new firmware to load into inactive block while active block runs. Use Value: Enables atomic firmware swaps with rollback capability, meeting ISO 26262 ASIL-B requirements for fail-safe update execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002N-70PC | No RESET pin functionality; boot block lockout cannot be overridden with 12 V pulse | Not suitable where field-recoverable boot corruption is required; lacks hardware reset coordination | Select only if system-level reset is handled externally and boot block override is unnecessary |
| AM29LV002BT-70PC | Different command set (AMD-style); 5 V-only but uses different unlock sequences and has no 12 V override | Requires redesign of firmware update routines; no equivalent boot block protection mechanism | Choose only when migrating legacy AMD-based designs and full command compatibility is verified |
Compared with AT49F002N-70PC and AM29LV002BT-70PC, the AT49F002T-70PC uniquely combines 12 V–enabled boot block override with Atmel's standardized command set-critical for systems requiring guaranteed recovery paths after failed updates.
Availability
AT49F002T-70PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and telecom base station configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT49F002T-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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and security ICs for embedded applications.
The AT49F002T series belongs to Atmel's 5V Flash memory product line, designed specifically for in-system reprogrammability in resource-constrained embedded systems requiring robust boot code protection and sector-level update flexibility.
FAQ
What is the boot block address range for AT49F002T-70PC?
The boot block for AT49F002T-70PC occupies address range 3C000H to 3FFFFH (16K bytes), distinct from the AT49F002(N) variant's 00000H–03FFFH mapping. This relocation isolates boot code from main application memory and enables independent protection. The AT49F002T-70PC datasheet confirms this layout in the block diagram and command definitions section.
Does AT49F002T-70PC support 12 V override of the boot block lockout feature?
Yes, AT49F002T-70PC supports 12 V ± 0.5 V applied to the RESET pin to temporarily disable boot block lockout, enabling chip/sector erase or byte programming even after lockout activation. This feature is explicitly documented in the "Boot Block Programming Lockout Override" section and is absent in AT49F002N-70PC variants.
What are the valid package options for AT49F002T-70PC?
AT49F002T-70PC is specified exclusively in the 32-pin PDIP (plastic dual inline package), identified as package code 32P6. Other suffixes like JC (PLCC), TC (TSOP), or VC (VSOP) denote different physical packages and are not interchangeable with the -70PC variant.
How does AT49F002T-70PC detect end-of-program without polling?
AT49F002T-70PC provides I/O6 toggle-bit detection: during programming or erase, successive reads cause I/O6 to alternate between high and low states; cessation of toggling indicates completion. This method avoids bus contention and works with any static address, unlike DATA polling which requires reading the last programmed byte on I/O7.
What is the maximum erase time for a single sector in AT49F002T-70PC?
The maximum erase time for any sector-including parameter blocks (3A000–3BFFF, 38000–39FFF) or main memory blocks-is 10 seconds, matching the full-chip erase specification. This value is characterized and guaranteed across commercial temperature range (0°C to 70°C) per the AC characteristics table in the AT49F002T-70PC datasheet.
AT49F002T-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
AT49F002T-70PC FAQ
1.How can I place an order for AT49F002T-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002T-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 AT49F002T-70PC reliable?
The price and inventory of AT49F002T-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002T-70PC is usually 5 days.
3.What payment methods are accepted for AT49F002T-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002T-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002T-70PC?
AT49F002T-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002T-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 AT49F002T-70PC?
For technical support, including AT49F002T-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002T-70PC requirements.
6.How does Aetrix verify that AT49F002T-70PC is sourced from the original manufacturer or authorized distributors?
All AT49F002T-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 AT49F002T-70PC meets industry standards.
7.What is the process for return or replacement of AT49F002T-70PC?
All AT49F002T-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002T-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 AT49F002T-70PC part is unused and in its original packaging.
Return procedure for AT49F002T-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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