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Microchip Technology AT49F001T-70JI
- Part No.:
- AT49F001T-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001T-70JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,244
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Product details
Overview
AT49F001T-70JI from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC with 70 ns read access time, sector-based architecture (16K boot block + two 8K parameter blocks + 32K/64K main memory), and hardware data protection. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F001T-70JI datasheet, AT49F001T-70JI pinout, AT49F001T-70JI application, or AT49F001T-70JI equivalent, key selection considerations include boot block lockout behavior (1C000H–1FFFFH), 10 µs/byte typical programming time, 10-second erase cycle, CMOS standby current of 100 µA, and PLCC-32 package compatibility with industrial temperature range (−40°C to +85°C).
Technical Context
The AT49F001T-70JI implements a command-register-based architecture for byte programming, sector erase, and chip erase using standard 5V-only write cycles (no high-voltage programming required). Its sector map assigns the 16K boot block to address range 1C000H–1FFFFH - distinct from the AT49F001(N) variant - enabling secure bootloader storage.
Hardware protection includes VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored on WE/CE), and control-line gating (OE low, CE high, or WE high disables writes). Data polling (I/O7 complement) and toggle-bit (I/O6) methods support end-of-program/erase detection without external timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full firmware images for 8-bit/16-bit MCUs. |
| Read Access Time | 70 ns max - enables direct execution from flash in systems with ≤14 MHz bus clocks. |
| Byte Programming Time | 10 µs typical - allows rapid field updates of configuration parameters or small code patches. |
| Erase Cycle Time | 10 seconds max - supports full-chip or sector-level erasure without external high-voltage circuitry. |
| Standby Current | 100 µA at VCC = 5V - meets low-power requirements for battery-backed or always-on embedded controllers. |
| Endurance | 10,000 write/erase cycles - validated for applications requiring infrequent but reliable firmware revisions over product lifetime. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including motor drives, PLCs, and instrumentation. |
| Supply Voltage | 5.0 V ±10% - compatible with legacy 5V logic systems without level-shifting. |
Pinout & Package
AT49F001T-70JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE, with dimensions 12.57 mm × 15.11 mm × 3.56 mm (max height). Pin 1 identifier is a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 directly map to memory locations 00000H–1FFFFH. |
| I/O0–I/O7 | Data Bus | Bi-directional 8-bit data path; supports byte-wide reads/writes and complies with standard EPROM timing protocols. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high - enables shared data bus operation. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequences - central to all programming/erase operations. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12V override enables boot block reprogramming when lockout is active. |
| VCC | Power Supply | +5V supply input; internal VCC sense circuitry disables programming if voltage drops below ~3.8V. |
| GND | Ground | Reference ground for all signals and power; decoupling capacitor placement near this pin is critical for stable read/write margins. |
| NC | No Connect | Pin 32 in PLCC package - must remain unconnected; floating or driven states may cause undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent 16K boot block (1C000H–1FFFFH), two 8K parameter blocks (1A000H–1BFFFH, 18000H–19FFFH), and two main memory blocks (10000H–17FFFH, 00000H–0FFFFH) enable selective firmware updates without full-chip erase. |
| Boot Block Lockout | Software-enabled write protection for boot sector; once activated, prevents reprogramming at ≤5.5V - ensures bootloader integrity during field upgrades. |
| Hardware Data Protection | VCC sensing, noise filtering, and control-line gating eliminate unintended writes due to power transients, EMI, or software glitches - critical for mission-critical firmware storage. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, hardware-verified completion signaling for program/erase cycles - eliminates need for fixed delay timers in host firmware. |
| 5V-Only Operation | Eliminates requirement for 12V programming supplies or charge pumps - simplifies board design and reduces BOM cost versus older EPROM/EEPROM solutions. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing direct execution capability and field-upgradable code via RS-485 or Ethernet interfaces. Use Value: Boot block lockout preserves core runtime engine while allowing parameter block updates - reducing downtime during version rollouts. | Use Scenario: Retaining calibration coefficients, device serial numbers, and safety-critical configuration settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant data storage with guaranteed 10,000-cycle endurance and industrial temperature operation. Use Value: Hardware data protection prevents corruption during power brownouts common in battery-operated medical devices. |
| Automotive Body Control Module | Telecom Base Station Bootloader |
Use Scenario: Hosting firmware for door lock controllers, lighting modules, and window lift ECUs in passenger vehicles. IC Role / Device Role / Timing Role: In-system reprogrammable flash memory interfaced to 8051 or ARM7-based microcontrollers via parallel bus. Use Value: 70 ns read access supports real-time response to CAN bus commands without external cache. | Use Scenario: Storing primary bootloader code that initializes FPGA configuration and loads application firmware over PCIe or SPI. IC Role / Device Role / Timing Role: Trusted boot memory with verified integrity - boot block lockout prevents unauthorized modification of secure boot chain. Use Value: RESET pin 12V override allows factory recovery of corrupted boot code without PCB rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002T-70JI | 2 Mbit density (256K × 8), same 70 ns access, identical PLCC-32 package and command set. | Supports larger firmware images; requires no layout change but needs updated address decoding for A17. | Select when future firmware growth exceeds 1 Mbit or dual-bank operation is needed. |
| SST39VF020-70-4C-NHE | 2 Mbit, 70 ns, 3.3V core (with 5V I/O tolerance), TSOP-32 package, different command protocol (SST-specific). | Lower active power (25 mA vs. 50 mA); incompatible pinout and timing - requires PCB redesign and firmware driver update. | Choose only for new designs targeting lower power or 3.3V system integration; not drop-in replaceable. |
Compared with AT49F001T-70JI, AT49F002T-70JI offers double capacity with identical footprint and interface, while SST39VF020 demands hardware and software changes but delivers reduced power and modern voltage compatibility.
Availability
AT49F001T-70JI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49F001T-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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products, including manufacturing, documentation, and technical assistance.
The AT49F001T series belongs to Atmel's parallel-interface Flash memory product line, designed specifically for 5V embedded systems needing in-system reprogrammability, robust data retention, and industrial-grade reliability without external high-voltage circuitry.
FAQ
What is the boot block address range for AT49F001T-70JI?
The boot block for AT49F001T-70JI occupies address range 1C000H to 1FFFFH (16 Kbytes). This differs from the AT49F001(N) variant, which uses 00000H–03FFFH. The AT49F001T-70JI's relocated boot block supports memory-mapped execution in systems where lower addresses are reserved for RAM or peripherals.
Does AT49F001T-70JI support 12V reset override for boot block reprogramming?
Yes, AT49F001T-70JI supports 12V ±0.5V applied to the RESET pin to override boot block lockout and permit reprogramming even after lockout activation. This feature is explicitly documented for the AT49F001(N)T family and is not available on the AT49F001N(T) variant.
What package type is used for AT49F001T-70JI?
AT49F001T-70JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package, designated as 32J per Atmel's ordering information. Its dimensions conform to JEDEC MS-016, Variation AE, with a body size of 12.57 mm × 15.11 mm and maximum height of 3.56 mm.
How does hardware data protection work in AT49F001T-70JI?
AT49F001T-70JI implements three hardware protections: (1) VCC sense disables programming if supply drops below ~3.8V; (2) any of OE low, CE high, or WE high inhibits write cycles; (3) noise filters reject sub-15 ns pulses on WE/CE. These prevent spurious writes during power-up, EMI events, or software errors.
What is the difference between AT49F001T-70JI and AT49F001-70JI?
AT49F001T-70JI features a relocated 16K boot block (1C000H–1FFFFH) and RESET pin 12V override capability, whereas AT49F001-70JI uses the standard boot block (00000H–03FFFH) and lacks RESET override. Both share identical timing (70 ns), packaging (PLCC-32), and industrial temperature rating.
AT49F001T-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:
- 1Mbit
- Memory Organization:
- 128K 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)
AT49F001T-70JI FAQ
1.How can I place an order for AT49F001T-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001T-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 AT49F001T-70JI reliable?
The price and inventory of AT49F001T-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001T-70JI is usually 5 days.
3.What payment methods are accepted for AT49F001T-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001T-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001T-70JI?
AT49F001T-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001T-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 AT49F001T-70JI?
For technical support, including AT49F001T-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001T-70JI requirements.
6.How does Aetrix verify that AT49F001T-70JI is sourced from the original manufacturer or authorized distributors?
All AT49F001T-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 AT49F001T-70JI meets industry standards.
7.What is the process for return or replacement of AT49F001T-70JI?
All AT49F001T-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001T-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 AT49F001T-70JI part is unused and in its original packaging.
Return procedure for AT49F001T-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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