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Microchip Technology AT49F001N-70JC
- Part No.:
- AT49F001N-70JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001N-70JC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,679
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Product details
Overview
AT49F001N-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 16KB boot block lockout. It is commonly deployed in firmware update-capable industrial controllers and legacy BIOS modules.
For engineers reviewing the AT49F001N-70JC datasheet, AT49F001N-70JC pinout, AT49F001N-70JC application, or AT49F001N-70JC equivalent, key selection considerations include its PLCC-32 package, 5V-only operation without high-voltage programming, boot-sector write protection, DATA polling/Toggle Bit status detection, and compatibility with standard EPROM-like bus timing (CE/OE/WE control).
Technical Context
The AT49F001N-70JC implements a command-register-based architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its internal logic handles timing-critical operations-including erase verification and program pulse generation-without external clocks or timers.
Memory organization is fixed: 16KB boot block (00000H–03FFFH), two 8KB parameter blocks, and two main memory blocks (32KB + 64KB). The RESET pin is DC-connected (not functional for reset or boot override), distinguishing it from the T-suffix variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full firmware image storage for 8-bit/16-bit MCUs. |
| Read Access Time | 70 ns max - ensures compatibility with 14 MHz Z80, 8051, and similar legacy bus systems without wait states. |
| Byte Programming Time | 10 µs typical - enables fast field updates of configuration parameters or calibration data. |
| Chip Erase Time | 10 seconds - allows predictable firmware recovery during manufacturing or service without external timing circuitry. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay loops in host firmware. |
| Write Endurance | 10,000 program/erase cycles - validated for applications requiring infrequent but reliable field updates over 10+ year product lifecycles. |
| Power Dissipation | 50 mA active current / 100 µA CMOS standby - suitable for low-power industrial systems with battery-backed operation. |
Pinout & Package
AT49F001N-70JC is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE. Pin 1 is marked by a corner chamfer; pins are numbered counterclockwise starting from the pin-1 identifier.
| 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 | Bidirectional Data Bus | 8-bit parallel interface compatible with standard microprocessor data buses; supports byte-wide reads/writes without multiplexing. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in shared-memory systems. |
| OE | Output Enable | Active-low output control; used with CE to gate data onto bus - enables interleaved memory-mapped I/O and flash access. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - critical for entering programming/erase modes. |
| RESET | DC Input (No Reset Function) | DC-connected pin (no reset capability); not used for reset or boot override - differs from AT49F001T where RESET enables 12V boot reprogramming. |
| NC | No Connect | Pin 32 in PLCC package - electrically isolated; must remain unconnected per datasheet to avoid latch-up or timing violations. |
| VCC | Power Supply | +5.0 V ±10% supply; internal voltage sensing disables programming if VCC < 3.8 V - prevents corruption during brown-out conditions. |
| GND | Ground Reference | Signal and power ground reference for all inputs/outputs; decoupling capacitor required within 1 cm of VCC/GND pins. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16KB boot block (00000H–03FFFH) can be permanently write-protected via 6-byte command sequence - secures bootloader code against accidental overwrite. |
| 5V-Only Reprogrammability | No external 12V programming voltage required; all commands executed using standard 5V logic levels - simplifies system power design and eliminates HV charge pumps. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibition (OE low/CE high/WE high blocks writes) - prevents spurious writes during EMI events or power transients. |
| Two Status Detection Methods | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - provides host firmware flexibility in determining program/erase completion without fixed delays. |
| CMOS Standby Current | 100 µA maximum at 0°C–70°C - enables low-power sleep modes in battery-operated instrumentation and remote sensors. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Modules |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O mapping tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; interfaces directly to 80C32 or 80C188 CPU buses using CE/OE/WE handshaking. Use Value: Enables remote firmware patches without hardware replacement; boot block lockout preserves core runtime engine integrity across updates. |
Use Scenario: Holding POST routines, hardware initialization code, and CMOS setup data in desktop motherboards from the late 1990s through early 2000s. IC Role / Device Role / Timing Role: Drop-in EPROM replacement providing faster 70 ns read access and in-circuit reflash capability via ISA-bus programmer. Use Value: Eliminates need for socketed UV-EPROMs and manual chip swapping; supports BIOS version rollbacks and vendor-specific feature activation. |
| Embedded Telemetry Controller Memory | Point-of-Sale Terminal Configuration Storage |
Use Scenario: Retaining calibrated sensor coefficients, communication protocol stacks, and event logs in remote environmental monitoring units powered by solar/battery hybrid systems. IC Role / Device Role / Timing Role: Low-power nonvolatile data repository; programmed via UART-to-parallel adapter during commissioning or maintenance visits. Use Value: 100 µA standby current extends battery life; sector erase allows selective update of calibration data without disturbing firmware. |
Use Scenario: Storing localized language strings, tax rate tables, and peripheral driver configurations in retail POS terminals deployed globally across diverse regulatory jurisdictions. IC Role / Device Role / Timing Role: Field-serviceable memory device accessible via JTAG or dedicated service port; supports regional firmware variants via parameter block updates. Use Value: Two independent 8KB parameter blocks allow simultaneous storage of multiple regional datasets; boot lockout prevents corruption of core payment processing code. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001BT-70EC | 3V/5V dual-voltage operation; 70 ns access; 32-pin TSOP package; no boot block lockout - uses sector protection bits instead. | Requires separate 3.3V supply rail; lacks dedicated boot-sector hardware lockout; relies on software-controlled sector protection. | Select when migrating to lower-voltage systems or needing TSOP footprint; verify host firmware supports AMD-style command set. |
| MX29LV001CTTI-70G | 5V-only; 70 ns access; PLCC-32; boot sector protection (top/bottom configurable); 100 µA standby; supports CFI query mode. | CFI compliance enables automatic ID and parameter detection in modern programmers; boot sector location is configurable (top 16KB or bottom 16KB). | Preferred for new designs requiring standardized flash interrogation; identical PLCC-32 pinout and timing - drop-in replacement with firmware minor updates. |
Compared with AM29LV001BT-70EC and MX29LV001CTTI-70G, the AT49F001N-70JC offers fixed-location boot block lockout with simpler command sequencing, making it more robust for legacy systems where CFI support or voltage flexibility is unnecessary.
Availability
AT49F001N-70JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS modules, and embedded telemetry controller memory requiring stable component supply across extended product lifecycles.
Supply support for AT49F001N-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. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT49F001 family was designed as a direct EPROM-replacement Flash memory for 8-bit and 16-bit embedded systems requiring in-system reprogrammability without high-voltage programming infrastructure.
FAQ
What is the function of the RESET pin on the AT49F001N-70JC?
The RESET pin on the AT49F001N-70JC is a DC-connected (non-functional) input per the datasheet - it does not provide reset functionality nor boot block override capability. Unlike the AT49F001T variant, this pin remains unused and must be left unconnected or tied to VCC/GND per board-level noise requirements. The AT49F001N-70JC relies solely on CE/OE/WE command sequences for all operations.
Does the AT49F001N-70JC support both chip erase and sector erase?
Yes, the AT49F001N-70JC supports both chip erase (10 seconds, erases all blocks except protected boot sector) and sector erase (targeted erasure of individual 8KB parameter blocks or 32KB/64KB main memory blocks). Sector erase uses a six-cycle command sequence with sector address latched on the final WE edge, enabling granular updates without affecting firmware integrity.
How is boot block protection enabled on the AT49F001N-70JC?
Boot block protection is enabled via a precise six-byte command sequence: load AAH to address 5555H, 55H to 2AAAH, 80H to 5555H, then AAH/55H/40H to 5555H/2AAAH/5555H. After execution, the 16KB boot block (00000H–03FFFH) becomes permanently write-protected at ≤5.5V - subsequent attempts to program or erase it will fail silently unless 12V is applied (not supported on N-suffix parts).
What packaging and temperature range does the AT49F001N-70JC specify?
The AT49F001N-70JC uses a 32-lead PLCC (Plastic Leaded Chip Carrier) package (JEDEC MS-016, Variation AE) and is rated for commercial temperature operation (0°C to +70°C). Its 70 ns access time, 50 mA active current, and 100 µA standby current are guaranteed across this range, making it suitable for office, lab, and controlled-industrial environments.
Can the AT49F001N-70JC be used as a direct replacement for standard EPROMs like the 27C010?
Yes, the AT49F001N-70JC is pin-compatible and functionally compatible with 27C010 EPROMs in read mode (CE/OE/WE timing matches), but requires command-based programming instead of UV erasure. Host systems must implement the six-byte software command sequences for erase/write - no hardware changes are needed, but firmware must be updated to manage Flash-specific operations.
AT49F001N-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)
AT49F001N-70JC FAQ
1.How can I place an order for AT49F001N-70JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-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 AT49F001N-70JC reliable?
The price and inventory of AT49F001N-70JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-70JC is usually 5 days.
3.What payment methods are accepted for AT49F001N-70JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-70JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-70JC?
AT49F001N-70JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-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 AT49F001N-70JC?
For technical support, including AT49F001N-70JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-70JC requirements.
6.How does Aetrix verify that AT49F001N-70JC is sourced from the original manufacturer or authorized distributors?
All AT49F001N-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 AT49F001N-70JC meets industry standards.
7.What is the process for return or replacement of AT49F001N-70JC?
All AT49F001N-70JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-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 AT49F001N-70JC part is unused and in its original packaging.
Return procedure for AT49F001N-70JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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