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Microchip Technology AT49F002T-70JI
- Part No.:
- AT49F002T-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F002T-70JI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,078
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Product details
Overview
AT49F002T-70JI 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 programming, 10-second erase cycle, and industrial temperature range (−40°C to +85°C). It features sector architecture including a 16K-byte boot block with programmable lockout, used for secure firmware storage in embedded controllers and BIOS applications.
For engineers reviewing the AT49F002T-70JI datasheet, AT49F002T-70JI pinout, AT49F002T-70JI application, or AT49F002T-70JI equivalent, this page delivers verified electrical specs, validated PLCC-32 pin mapping, boot-block protection behavior, DATA polling and toggle-bit status detection, and direct alternatives for industrial-grade Flash replacement.
Technical Context
The AT49F002T-70JI implements a command-based software-controlled architecture requiring no high-voltage programming inputs. Its internal control logic interprets six-cycle command sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h) to initiate chip erase, sector erase, byte programming, or boot-block lockout - all executed autonomously without external timing clocks.
It supports standard EPROM-like read operation via CE/OE/WE control with dual-line bus contention prevention, and includes hardware data protection via VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and active inhibit conditions (OE low, CE high, or WE high blocks writes). The RESET pin enables system-level reset and - uniquely on the T variant - 12 V override of boot-block lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 2 Mbit (262,144 × 8), organized as 256K bytes |
| Read Access Time | 70 ns - determines maximum bus clock rate in microcontroller interfaces |
| Byte Programming Time | 10 µs typical - enables fast field updates of small configuration data |
| Erase Cycle Time | 10 seconds max - defines minimum latency for full-sector reinitialization |
| Operating Voltage | 5 V ±10% - compatible with legacy 5 V logic systems without level shifting |
| Temperature Range | −40°C to +85°C - qualified for industrial control and automotive under-hood environments |
| Standby Current | 100 µA CMOS - enables low-power sleep modes in battery-backed systems |
| Write End Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) - eliminates need for fixed timing delays in firmware |
Pinout & Package
AT49F002T-70JI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-016 AE compliant, with 1.27 mm pitch and surface-mount footprint. Pin 1 is marked by index notch; pin 9 is NC (no connect) per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-byte addressing (A0–A15 for byte, A16–A17 for block selection) |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write operations; high-impedance when deselected |
| 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 during read, prevents bus contention |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command cycles |
| RESET | Reset Input | Active-low system reset; 12 V input enables boot-block override - unique to T variant |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and I/O buffers |
| GND | Ground Reference | Signal and power return path; decoupling required within 1 cm of VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte sector (3C000h–3FFFFh) permanently protected after command sequence; prevents accidental overwrite of bootloader code |
| Software-Controlled Erase | Chip or sector erase initiated via 6-cycle command - no external high-voltage generator needed |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibit prevent spurious writes during power transients or EMI events |
| End-of-Program Detection | Dual methods: DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) - simplifies firmware timing logic |
| Industrial Temperature Rating | −40°C to +85°C operation with guaranteed 70 ns access - suitable for factory automation and motor drives |
| Single 5 V Supply | Eliminates need for dedicated 12 V programming voltage - reduces BOM count and layout complexity |
Applications
| Industrial PLC Firmware Storage | Embedded System Bootloader Memory |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile program memory holding startup routines and real-time control logic; accessed at ≤14 MHz bus speed due to 70 ns tACC. Use Value: Boot block lockout ensures bootloader integrity across thousands of field updates; 10 µs/byte programming enables rapid parameter tuning without full reflash. |
Use Scenario: Hosting secure boot code in network-connected edge devices where firmware authenticity and update resilience are critical. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; provides deterministic 70 ns read latency for first instruction fetch. Use Value: 12 V RESET override allows recovery from corrupted boot sectors without device replacement; DATA polling avoids fixed delay loops in boot ROM. |
| Legacy Industrial Instrumentation | Automotive Diagnostic Module Memory |
Use Scenario: Replacing EPROMs in aging test equipment requiring field-upgradable calibration tables and measurement algorithms. IC Role / Device Role / Timing Role: Drop-in 5 V-compatible Flash replacing UV-erasable EPROMs; uses identical CE/OE/WE timing interface. Use Value: 10,000 write cycles and industrial temp rating extend service life beyond EPROM limits; no UV window or socket required. |
Use Scenario: Storing diagnostic firmware and vehicle-specific configuration in OBD-II modules deployed in engine compartments. IC Role / Device Role / Timing Role: In-system reprogrammable memory supporting dealer-level firmware updates over CAN; operates reliably at 85°C ambient. Use Value: Sector architecture isolates boot code (protected) from application code (field-updatable); 100 µA standby current minimizes battery drain during vehicle sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-NHE | 3.3 V supply, 70 ns access, 2 Mbit, PLCC-32; lacks RESET-based boot override | Requires 3.3 V system design; no 12 V boot unlock - unsuitable for legacy 5 V recovery workflows | Select only if migrating to 3.3 V architecture and boot protection via software-only methods is acceptable |
| MX29LV200CBTI-70G | 3.0–3.6 V supply, 70 ns, 2 Mbit, TSOP-48; boot block at top address, no RESET override | Lower voltage, different package and pinout; incompatible with PLCC-32 footprint and 5 V logic levels | Choose for space-constrained designs needing TSOP; requires PCB redesign and level-shifting for 5 V systems |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CBTI-70G, the AT49F002T-70JI uniquely retains full 5 V compatibility, PLCC-32 drop-in fit, and hardware-enabled boot recovery - making it irreplaceable in legacy industrial upgrades where voltage and form factor constraints are fixed.
Availability
AT49F002T-70JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded system bootloader memory, legacy instrumentation recalibration, and automotive diagnostic module memory requiring stable component supply across extended product lifecycles.
Supply support for AT49F002T-70JI 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, with deep expertise in nonvolatile memory process technology.
The AT49F002T series belongs to Atmel's 5 V Flash memory product line, designed specifically for industrial and automotive applications requiring in-system reprogrammability, robust data retention, and hardware-assisted boot security without external high-voltage circuitry.
FAQ
What is the boot block address range for AT49F002T-70JI?
The boot block for AT49F002T-70JI occupies addresses 3C000h to 3FFFFh (16 KB). This differs from the base AT49F002(N) variant, which locates the boot block at 00000h–03FFFh. The upper-address placement in the T variant avoids conflict with standard reset vectors in many 8051 and Z80-based systems, and is confirmed in the datasheet's memory map and boot lockout detection section (read from 3C002h).
Does AT49F002T-70JI support 12 V RESET override of boot block lockout?
Yes, AT49F002T-70JI supports 12 V ±0.5 V applied to the RESET pin to temporarily disable boot block programming lockout - enabling chip erase, sector erase, or byte programming of the protected region. This feature is explicitly documented as unavailable on the N(T) variant and is a defining characteristic of the T suffix, per the "Boot Block Programming Lockout Override" section.
What package type is used for AT49F002T-70JI?
AT49F002T-70JI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC), designated as package code "32J" in Atmel's ordering information. The datasheet confirms pin 9 is NC (no connect) for this variant, and mechanical dimensions align with JEDEC MS-016 AE standard - verified in the Packaging Information section (page 16).
How is end-of-program detected on AT49F002T-70JI?
AT49F002T-70JI provides two hardware-supported methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and toggle-bit detection (I/O6 toggles between 0 and 1 during programming and stabilizes upon completion). Both are specified in AC characteristics and require no external timing components - confirmed in the "DATA Polling" and "Toggle Bit" subsections.
Is AT49F002T-70JI pin-compatible with AT49F002N-70JI?
No - AT49F002T-70JI and AT49F002N-70JI are not pin-compatible. While both use PLCC-32 packaging, the RESET pin on the T variant supports 12 V override and functions as an active-low reset input, whereas the N(T) variant explicitly states RESET is not available. Datasheet Section 3 ("RESET") and Ordering Information (page 13) confirm functional and electrical incompatibility at the RESET terminal.
AT49F002T-70JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- 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:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49F002T-70JI FAQ
1.How can I place an order for AT49F002T-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F002T-70JI 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-70JI reliable?
The price and inventory of AT49F002T-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F002T-70JI is usually 5 days.
3.What payment methods are accepted for AT49F002T-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F002T-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F002T-70JI?
AT49F002T-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F002T-70JI 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-70JI?
For technical support, including AT49F002T-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F002T-70JI requirements.
6.How does Aetrix verify that AT49F002T-70JI is sourced from the original manufacturer or authorized distributors?
All AT49F002T-70JI 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-70JI meets industry standards.
7.What is the process for return or replacement of AT49F002T-70JI?
All AT49F002T-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F002T-70JI, 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-70JI part is unused and in its original packaging.
Return procedure for AT49F002T-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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