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Microchip Technology AT49F001-70JC
- Part No.:
- AT49F001-70JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001-70JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,667
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Product details
Overview
AT49F001-70JC 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 delivers 70 ns read access time, 10 µs typical byte programming, 10-second chip erase, hardware data protection, and sector-based architecture with 16K-byte boot block lockout.
For engineers reviewing the AT49F001-70JC datasheet, AT49F001-70JC pinout, AT49F001-70JC application, or AT49F001-70JC equivalent, key selection criteria include commercial temperature range (0°C to 70°C), PLCC-32 package compatibility, 5V single-supply operation, boot-sector write protection, and DATA polling/Toggle Bit end-of-program detection.
Technical Context
The AT49F001-70JC implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read timing and command-based programming/erasure. Its internal state machine executes 6-cycle software command sequences (e.g., Chip Erase at 5555h/AAh → 2AAAh/55h → 5555h/80h → …) without external high-voltage circuitry.
Memory organization includes one 16K-byte boot block (address 00000h–03FFFh for AT49F001, confirmed for AT49F001-70JC per ordering table), two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). Boot block lockout is enabled via a 6-command sequence and enforced by VCC sense (inhibit below 3.8V) and noise filtering (rejects <15 ns pulses on WE/CE).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - supports full firmware image storage for 8-bit MCUs with space for parameter tables and dual-bank updates. |
| Read Access Time | 70 ns - enables direct execution from Flash (XIP) in systems with ≤14 MHz bus clocks without wait states. |
| Byte Programming Time | 10 µs typical - allows rapid field updates of configuration data or calibration values without system interruption. |
| Chip Erase Time | 10 seconds - deterministic full-memory reset for secure firmware recovery or factory reprogramming. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Write Endurance | 10,000 program/erase cycles - sufficient for >5 years of daily parameter logging in industrial controllers. |
| Power Dissipation | 275 mW active (50 mA @ 5.5V), 100 µA CMOS standby - suitable for low-power battery-backed applications. |
Pinout & Package
AT49F001-70JC is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE, with pin 1 identifier and 1.27 mm lead pitch. Dimensions: 12.47 mm × 14.99 mm × 3.35 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 131,072-word addressing; A0 least significant bit. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K family buses; high-impedance when CE or OE high. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables bus contention avoidance. |
| OE | Output Enable | Active-low output control; used with CE to gate data output independently of write operations. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming cycles. |
| RESET | Reset Input | Active-low hardware reset; halts ongoing program/erase and forces outputs to high-Z; 12V override enables boot block reprogramming. |
| VCC | Power Supply | +5V ±10% supply; internal VCC sense disables programming if voltage drops below 3.8V. |
| GND | Ground | Reference return for all signals and power; decoupling capacitor required within 1 cm of VCC/GND pins. |
| NC | No Connect | Pin 1 in PLCC package is NC - must remain unconnected per datasheet Note on page 2. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16K-byte boot sector (00000h–03FFFh) can be permanently write-protected to preserve bootloader integrity during field firmware updates. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibition (OE low/CE high/WE high blocks writes) prevent accidental reprogramming. |
| Two End-of-Operation Detection Methods | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide flexible, timer-free host firmware synchronization for program/erase completion. |
| 5V-Only Reprogrammability | Eliminates need for 12V programming supplies or external charge pumps - simplifies PCB design and reduces BOM cost. |
| CMOS Standby Current | 100 µA max at 0°C–70°C - enables use in always-on systems with battery backup or energy harvesting power sources. |
Applications
| Industrial PLC Firmware Storage | Automotive Instrument Cluster Code Memory |
|---|---|
Use Scenario: Storing boot loader and application firmware in programmable logic controllers requiring field-upgradable code without hardware rework. IC Role / Device Role / Timing Role: Nonvolatile code storage with 70 ns read access enabling zero-wait-state execution from Flash in ARM7 or 8051-based control CPUs. Use Value: Boot block lockout prevents corruption of critical startup routines during over-the-air updates of application code in main memory blocks. |
Use Scenario: Holding calibrated display driver firmware and vehicle-specific configuration data in digital dashboards subject to ESD and temperature cycling. IC Role / Device Role / Timing Role: Reliable, high-endurance (10,000 cycles) Flash memory operating across -40°C to +85°C ambient with 5V supply tolerance. Use Value: Hardware data protection (VCC sense, noise filtering) ensures immunity to automotive power rail transients during ignition switching. |
| Medical Device Parameter Logging | Networking Equipment Boot Image |
Use Scenario: Recording calibration coefficients and usage logs in portable diagnostic equipment with battery backup and infrequent firmware updates. IC Role / Device Role / Timing Role: Low-power (100 µA standby) nonvolatile memory supporting long-term data retention (>20 years) and secure parameter storage. Use Value: Sector erase capability allows independent updating of parameter blocks without disturbing boot code or application firmware. |
Use Scenario: Storing primary and fallback boot images in Ethernet switches and routers requiring fail-safe firmware recovery after corrupted updates. IC Role / Device Role / Timing Role: Dual-main-memory-block architecture (32K + 64K) enables A/B firmware partitioning for atomic update rollbacks. Use Value: 10-second chip erase provides deterministic recovery path when both boot images are invalid, meeting telecom carrier reboot SLAs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001MT-70EC | 48-pin TSOP package, 5V/3.3V selectable I/O, 70 ns access, no RESET pin; requires 12V for boot block unlock. | Lacks PLCC-32 footprint and 12V RESET override; better suited for space-constrained surface-mount designs. | Select if board layout uses TSOP and 12V override is not required; verify VCC tolerance matches system rail. |
| SST39VF010-70-4C-NHE | 32-pin PLCC, 5V-only, 70 ns access, 1 Mbit density, but no boot block lockout feature; uses different command set. | Cannot protect boot sector - unsuitable where bootloader integrity is mandatory per safety standards (IEC 62304). | Choose only for cost-sensitive applications where boot code resides in separate ROM or is never updated in-field. |
Compared with AM29LV001MT-70EC and SST39VF010-70-4C-NHE, the AT49F001-70JC uniquely combines PLCC-32 compatibility, hardware-enforced boot block lockout, and 12V RESET override - making it the only option among the three that guarantees bootloader immutability while allowing emergency reprogramming.
Availability
AT49F001-70JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive instrument cluster code memory, and medical device parameter logging requiring stable component supply across extended product lifecycles.
Supply support for AT49F001-70JC 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, ensuring long-term documentation, reliability data, and cross-reference guidance.
The AT49F001 product line was designed for 5V embedded systems needing in-system reprogrammable nonvolatile memory with robust data integrity features - especially where bootloader protection and deterministic erase times are critical.
FAQ
What is the memory organization of the AT49F001-70JC?
The AT49F001-70JC contains 1 Mbit (131,072 × 8) of Flash memory organized into one 16K-byte boot block (00000h–03FFFh), two 8K-byte parameter blocks, and two main memory blocks (32K and 64K bytes). This sector architecture enables selective erasure and protects critical boot code while allowing flexible firmware updates in other regions. The AT49F001-70JC uses this exact layout per its AT49F001(N) designation.
Does the AT49F001-70JC support 5V-only programming?
Yes, the AT49F001-70JC operates exclusively at 5V for both read and reprogramming functions - no external high-voltage generator or 12V supply is needed for standard byte programming or sector erasure. The 12V RESET pin is solely for overriding boot block lockout and is not used during normal operation. This 5V-only capability is a core specification of the AT49F001-70JC.
How is boot block protection implemented on the AT49F001-70JC?
The AT49F001-70JC implements boot block lockout via a 6-command software sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once enabled, the 16K-byte boot block (00000h–03FFFh) becomes permanently write-protected at ≤5.5V. The AT49F001-70JC supports 12V RESET override to temporarily disable protection for recovery - a feature confirmed in the datasheet's "Boot Block Programming Lockout Override" section.
What package type does the AT49F001-70JC use?
The AT49F001-70JC uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as 32J per Atmel's ordering information table. Pin 1 is marked with a corner notch, and pin 1 itself is a no-connect (NC) terminal - a requirement explicitly stated for the AT49F001N(T) variants and confirmed for AT49F001-70JC in the PLCC top view diagram and packaging notes.
Can the AT49F001-70JC be used in industrial temperature applications?
No - the AT49F001-70JC is rated for the commercial temperature range (0°C to 70°C) only, as indicated by the "C" suffix in its ordering code and the "Commercial (0° to 70°C)" entry in the AT49F001 Ordering Information table. For industrial operation (-40°C to +85°C), the correct variant is AT49F001-70JI (PLCC package) or AT49F001-70PI (PDIP), not the AT49F001-70JC.
AT49F001-70JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49F001-70JC FAQ
1.How can I place an order for AT49F001-70JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001-70JC 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 AT49F001-70JC reliable?
The price and inventory of AT49F001-70JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001-70JC is usually 5 days.
3.What payment methods are accepted for AT49F001-70JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001-70JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001-70JC?
AT49F001-70JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001-70JC 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 AT49F001-70JC?
For technical support, including AT49F001-70JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001-70JC requirements.
6.How does Aetrix verify that AT49F001-70JC is sourced from the original manufacturer or authorized distributors?
All AT49F001-70JC 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 AT49F001-70JC meets industry standards.
7.What is the process for return or replacement of AT49F001-70JC?
All AT49F001-70JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001-70JC, 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 AT49F001-70JC part is unused and in its original packaging.
Return procedure for AT49F001-70JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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