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Microchip Technology AT49F001-70JI
- Part No.:
- AT49F001-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001-70JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,381
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Product details
Overview
AT49F001-70JI from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 55 ns read access time, 10 µs/byte typical programming, 10-second chip erase, hardware data protection, and sector architecture with 16KB boot block lockout. It is commonly deployed in industrial firmware update modules requiring field-reprogrammable boot code integrity.
For engineers reviewing the AT49F001-70JI datasheet, AT49F001-70JI pinout, AT49F001-70JI application, or AT49F001-70JI equivalent, key selection considerations include its industrial temperature range (−40°C to +85°C), PLCC-32 package, 5V-only operation without high-voltage programming, DATA polling/Toggle Bit end-of-write detection, and boot block write-protection enforcement via command sequence.
Technical Context
The AT49F001-70JI implements a command-based Flash architecture with internal program control logic and autonomous erase timing. Its sector organization includes one 16KB boot block (address 1C000H–1FFFFH), two 8KB parameter blocks, and two main memory blocks (32KB and 64KB), enabling selective erasure without full-chip reset.
It uses standard EPROM-compatible control signals (CE/OE/WE) for read access and supports software command sequences-including Chip Erase (6-cycle 5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/10H) and Byte Program (4-cycle)-all executed at 5V with no external high-voltage supply required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits); provides sufficient space for bootloader + configuration data in resource-constrained MCU systems. |
| Read Access Time | 70 ns max; ensures compatibility with 14 MHz bus timing in legacy 8-bit microcontrollers. |
| Byte Programming Time | 10 µs typical (50 µs max); enables rapid field updates of small firmware patches without system downtime. |
| Erase Cycle Time | 10 seconds max for full chip; allows predictable maintenance windows during firmware upgrades. |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling); eliminates need for fixed delay timers in host firmware. |
| Operating Voltage | 5.0 V ±10%; eliminates requirement for dedicated programming voltage rails or charge pumps. |
| Temperature Range | −40°C to +85°C (industrial grade); validated for use in factory automation, motor drives, and outdoor telemetry units. |
Pinout & Package
AT49F001-70JI is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016 Variation AE. Pin 1 is marked by a corner notch; pins are numbered counterclockwise starting from the notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 is active for top 64KB region (10000H–1FFFFH). |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K family microcontrollers; supports byte-level reads/writes. |
| CE | Chip Enable | Active-low chip select; when high, device enters CMOS standby (<300 µA), isolating bus drivers. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during multi-device sharing. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing. |
| RESET | Reset Input | Active-low reset; halts ongoing program/erase and forces high-Z outputs; 12V override enables boot block reprogramming. |
| VCC / GND | Power Supply | Single 5V supply; decoupling capacitor (0.1 µF) required within 1 cm of VCC/GND pins for noise immunity. |
| NC | No Connect | Pin 32 (PLCC); must remain unconnected-no internal bonding or function. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16KB boot sector (1C000H–1FFFFH) can be permanently write-protected via 6-byte command sequence, safeguarding bootloader integrity against accidental overwrite. |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low/CE high/WE high blocks writes) prevent spurious writes during power transients. |
| 5V-Only Reprogrammability | Eliminates need for 12V programming supplies or external charge pumps-reduces BOM cost and PCB complexity in field-upgradeable designs. |
| DATA Polling & Toggle Bit | Enables host MCU to poll I/O7 or monitor I/O6 toggling to detect write completion without fixed delays or external clocks-improves firmware determinism. |
| 10,000 Write/Erase Cycles | Guaranteed endurance supports >5 years of quarterly firmware updates in industrial monitoring equipment with logging functionality. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; executes boot code directly from XIP-capable address space (00000H–1FFFFH). Use Value: Enables remote firmware patching without hardware replacement; boot block lockout prevents corruption of safety-critical startup routines during update. |
Use Scenario: Retaining device-specific calibration coefficients, user preferences, and regulatory audit logs in portable diagnostic instruments. IC Role / Device Role / Timing Role: Parameter storage with sector-erasable 8KB blocks; allows independent update of calibration data without disturbing application firmware. Use Value: Supports FDA 21 CFR Part 11 compliance via write-protected boot sector and deterministic erase/program cycles traceable in device logs. |
| Automotive Body Control Module | Telecom Remote Node Bootloader |
Use Scenario: Hosting bootloader and feature-enabling keys in body control units operating across −40°C to +85°C under ESD-prone vehicle harness conditions. IC Role / Device Role / Timing Role: Secure boot memory with RESET-pin 12V override for factory reflash; withstands automotive load dump transients via VCC-sense protection. Use Value: Meets AEC-Q100 stress test requirements for data retention (>20 years) and write endurance in harsh electrical environments. |
Use Scenario: Storing primary bootloader and fail-safe recovery image in cellular base station remote radio units requiring zero-downtime field upgrades. IC Role / Device Role / Timing Role: Dual-block main memory (32KB + 64KB) enables A/B firmware partitioning; sector erase allows atomic swap without runtime interruption. Use Value: Reduces upgrade window from minutes to seconds by eliminating full-chip erase; Toggle Bit polling enables precise timing control in real-time upgrade protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-70-4C-NHE | 5V-only 1Mbit Flash; 70 ns access; 32-pin TSOP; lacks RESET pin and 12V boot override. | No hardware boot lockout override; relies solely on software lock; less suitable for safety-critical bootloader recovery. | Preferred where TSOP footprint and lower profile are prioritized over field-serviceable boot reflash capability. |
| MX29LV160CBTI-70G | 3V/5V tolerant; 70 ns access; 48-pin TSOP; CFI-compliant; includes SRAM-like write buffer. | Requires voltage translation for pure 5V systems; boot block layout differs (16KB at bottom); no 12V RESET override. | Chosen when migrating to 3.3V core logic or requiring Common Flash Interface compatibility for standardized driver stacks. |
Compared with SST39VF010-70-4C-NHE and MX29LV160CBTI-70G, the AT49F001-70JI uniquely combines industrial-grade PLCC packaging, dedicated RESET-pin 12V boot override, and explicit 16KB top-address boot block lockout-making it optimal for legacy 5V systems requiring certified field-recoverable boot firmware.
Availability
AT49F001-70JI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body control applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for AT49F001-70JI 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 the AT49F001 series. The company specializes in secure, reliable microcontrollers and nonvolatile memory solutions for industrial and automotive markets.
The AT49F001 product line was designed for embedded systems requiring field-upgradable firmware with hardware-enforced boot code protection-targeting applications where data integrity, long-term reliability, and 5V system compatibility are critical.
FAQ
What is the exact memory organization of the AT49F001-70JI?
The AT49F001-70JI contains 1 Mbit (131,072 words × 8 bits) of Flash memory organized into five sectors: one 16KB boot block (1C000H–1FFFFH), two 8KB parameter blocks (1A000H–1BFFFH and 18000H–19FFFH), and two main memory blocks (10000H–17FFFH = 32KB; 00000H–0FFFFH = 64KB). This layout enables selective erasure and protects boot code independently.
Does the AT49F001-70JI require high-voltage programming?
No, the AT49F001-70JI operates at 5V only for both read and programming functions. It does not require 12V or higher voltages for standard byte programming or sector erasure. Only the RESET pin accepts 12V ±0.5V to override boot block lockout-a feature not used during normal operation.
How is boot block protection enabled on the AT49F001-70JI?
Boot block protection is enabled by executing a six-cycle command sequence: write AAH to 5555H, 55H to 2AAAH, 80H to 5555H, AAH to 5555H, 55H to 2AAAH, then 40H to 5555H. Once activated, the 16KB boot block (1C000H–1FFFFH) becomes permanently write-protected at ≤5.5V, ensuring bootloader integrity in deployed systems.
What package type is used for the AT49F001-70JI?
The AT49F001-70JI uses a 32-lead Plastic Leaded Chip Carrier (PLCC-32) package, per JEDEC MS-016 Variation AE. It measures 12.5 mm × 15.1 mm × 3.5 mm (max height), with J-leads and pin 1 identified by a corner notch. This package offers robust thermal and mechanical performance for industrial reflow and hand-soldering.
Can the AT49F001-70JI be used in a 3.3V system?
No-the AT49F001-70JI is specified for 5.0 V ±10% operation only. Its input thresholds (VIL = 0.8 V, VIH = 2.0 V), output drive strength, and internal charge pump design are optimized for 5V logic families. Interfacing with 3.3V microcontrollers requires level-shifting on all control and data lines to avoid functional failure or accelerated wear.
AT49F001-70JI 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)
AT49F001-70JI FAQ
1.How can I place an order for AT49F001-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001-70JI 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 AT49F001-70JI reliable?
The price and inventory of AT49F001-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001-70JI is usually 5 days.
3.What payment methods are accepted for AT49F001-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001-70JI?
AT49F001-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001-70JI 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 AT49F001-70JI?
For technical support, including AT49F001-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001-70JI requirements.
6.How does Aetrix verify that AT49F001-70JI is sourced from the original manufacturer or authorized distributors?
All AT49F001-70JI 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 AT49F001-70JI meets industry standards.
7.What is the process for return or replacement of AT49F001-70JI?
All AT49F001-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001-70JI, 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 AT49F001-70JI part is unused and in its original packaging.
Return procedure for AT49F001-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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