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Microchip Technology AT49F001ANT-55JU
- Part No.:
- AT49F001ANT-55JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001ANT-55JU.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49F001ANT-55JU from Atmel is a 1 Mbit (128K × 8) 5V-only in-system reprogrammable Flash memory with 55 ns read access time, 3-second chip erase cycle, and sector architecture comprising one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). It operates across the industrial temperature range (–40°C to +85°C) and is used in embedded firmware storage for microcontroller-based systems requiring field-upgradable code.
For engineers reviewing the AT49F001ANT-55JU datasheet, AT49F001ANT-55JU pinout, AT49F001ANT-55JU application, or AT49F001ANT-55JU equivalent, key selection criteria include its PLCC-32 package, hardware data protection (VCC sense, noise filter), byte-programming time (30 µs typical), DATA polling and toggle-bit end-of-cycle detection, and boot block programming lockout with 12V RESET override capability.
Technical Context
The AT49F001ANT-55JU implements a standard parallel Flash interface with CE/OE/WE control logic and supports EPROM-like read operation, software command-set programming, and sector- or chip-level erasure. Its internal program control logic manages timing for byte programming and erase cycles without external clocks.
It features dual-mode boot block protection: permanent lockout when enabled (for AT49F001ANT), plus optional 12V RESET override to reprogram the boot sector - a capability absent in the AN(T) variant. The device uses Atmel's nonvolatile CMOS process and supports both hardware and software product identification (Manufacturer Code 1FH, Device Code 04H).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for full bootloader + configuration data in resource-constrained embedded systems. |
| Read Access Time | 55 ns maximum - enables direct interfacing with 16–20 MHz microcontrollers without wait states. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small firmware patches or parameter sets. |
| Chip Erase Time | 3 seconds maximum - supports efficient full-memory reinitialization during manufacturing or recovery. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Boot Block Protection | 16K-byte sector (1C000H–1FFFFH) with lockout enable/disable via 6-byte command sequence - secures boot code integrity while permitting runtime updates to application sectors. |
| Power Dissipation | 20 mA active current / 50 µA CMOS standby - suitable for low-power industrial controllers with intermittent firmware access. |
Pinout & Package
AT49F001ANT-55JU is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016 Variation AE. Pin 1 is marked by a corner notch; pin 1 is NC on TSOP/VSOP variants but functional as RESET on PLCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A11 is don't-care in command cycles. |
| 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 control; used with CE to prevent bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low reset; at 12V ±0.5V enables boot block override - unique to PLCC variant of AT49F001ANT. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path; carries command codes, product ID, and memory contents; supports DATA polling on I/O7 and toggle-bit on I/O6. |
| NC | No Connect | Pin 32 (PLCC top view) is unconnected - must be left floating or tied to ground per layout guidelines. |
| VCC / GND | Power Supply | Single 5V ±10% supply; VCC sense circuitry inhibits programming if voltage drops below 3.8V. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | Enables secure bootloader storage (16K bytes at 1C000H–1FFFFH) while allowing independent erase/program of parameter and application sectors - critical for OTA-capable embedded devices. |
| 12V RESET Override for Boot Block | Allows reprogramming of locked boot sector via 12V pulse on RESET pin - a hardware recovery mechanism unavailable in AN(T) variants and essential for field-recoverable firmware. |
| Hardware Data Protection | Combines VCC sensing (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low / CE high / WE high prevents writes) - reduces risk of accidental corruption in noisy industrial environments. |
| DATA Polling & Toggle-Bit Status | Eliminates fixed-timing delays in host firmware: I/O7 returns complemented data until programming completes; I/O6 toggles during operation - enabling real-time, cycle-accurate status monitoring. |
| Software Product Identification | Standard 3-cycle entry (555H/AAH → AAH/55H → 555H/90H) reads Manufacturer Code 1FH and Device Code 04H - ensures correct algorithm selection in universal programmers and automated test systems. |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Bootloader |
|---|---|
|
Use Scenario: Storing and updating firmware for programmable logic controllers in factory automation systems where field upgrades must preserve boot integrity. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware-protected boot sector; interfaces directly to 8051 or ARM7 bus with 55 ns timing compliance. Use Value: Enables secure, in-system reprogramming of application code without risking bootloader corruption - reducing downtime during version rollouts. |
Use Scenario: Hosting bootloader code in engine control units that require certified, tamper-resistant startup routines and periodic calibration updates. IC Role / Device Role / Timing Role: Trusted boot memory with 12V RESET override for emergency recovery; meets automotive-grade industrial temperature requirements (–40°C to +85°C). Use Value: Guarantees boot code persistence across power cycles and allows authorized service technicians to restore corrupted boot sectors using standardized 12V pulse protocol. |
| Medical Device Configuration Memory | Networking Equipment Parameter Storage |
|
Use Scenario: Retaining calibrated sensor offsets and safety-critical operational parameters in portable diagnostic equipment with infrequent but mission-critical updates. IC Role / Device Role / Timing Role: Low-power (50 µA standby) Flash memory with hardware write protection; accessed only during initialization or maintenance mode. Use Value: Prevents inadvertent parameter overwrite during normal operation via VCC-sense and control-line interlock - satisfying IEC 62304 traceability requirements. |
Use Scenario: Storing MAC addresses, firmware version stamps, and network stack configuration in Ethernet switches and routers undergoing remote firmware upgrades. IC Role / Device Role / Timing Role: Sector-erasable Flash supporting independent update of parameter blocks (8K × 2) without disturbing main firmware image. Use Value: Allows atomic, fail-safe parameter updates via sector erase + byte program - eliminating risk of partial writes corrupting network identity or connectivity settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001BT-55REI | 48-pin SOIC package; 5V-only; 55 ns access; no 12V RESET override; boot block at top (00000H–03FFFH) | Lacks hardware boot sector recovery; requires PCB redesign due to different pin count and layout | Select when board space permits larger SOIC and 12V override is unnecessary; verify command set compatibility before migration. |
| MX29LV001CTTI-55G | 32-pin TSOP; 5V-only; 55 ns access; boot block lockout supported; no RESET pin - uses alternate command sequence for lockout override | TSOP footprint differs from PLCC; no dedicated RESET pin - boot unlock relies solely on software command timing | Choose for surface-mount density optimization; confirm host MCU timing margins meet MXIC's stricter tWP/tDH requirements. |
Compared with AM29LV001BT-55REI and MX29LV001CTTI-55G, the AT49F001ANT-55JU uniquely provides a dedicated RESET pin with 12V override for boot block reprogramming - a hardware-level recovery path not available in either alternative, making it preferred for safety-critical or field-serviceable designs.
Availability
AT49F001ANT-55JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU bootloader implementation, and medical device configuration memory requiring stable component supply over extended production lifecycles.
Supply support for AT49F001ANT-55JU 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 fabless semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs, with design centers across the US, Europe, and Asia.
The AT49F001A(N)(T) family was developed for cost-sensitive, in-system reprogrammable firmware storage in industrial and automotive embedded systems - emphasizing robustness, sector-level flexibility, and hardware-assisted data integrity.
FAQ
What is the boot block address range for AT49F001ANT-55JU?
The boot block for AT49F001ANT-55JU occupies address range 1C000H to 1FFFFH (16K bytes). This differs from the base AT49F001A(N) variant, which locates the boot block at 00000H–03FFFH. The upper-address placement avoids conflict with standard reset vectors in many 8-bit microcontrollers and is confirmed in the Command Definitions table and Block Diagram section of the datasheet.
Does AT49F001ANT-55JU support 12V RESET override for boot block programming?
Yes, AT49F001ANT-55JU supports 12V ±0.5V applied to the RESET pin to override boot block lockout and permit chip/sector erase or byte programming of the protected sector. This feature is explicitly documented in the "BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE" section and is exclusive to the PLCC-packaged ANT variant - not available on AN(T) or TSOP/VSOP versions.
What package type is used for AT49F001ANT-55JU?
AT49F001ANT-55JU uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32) package, identified by suffix "JU" per Atmel's ordering information table. The PLCC variant includes a functional RESET pin, unlike the TSOP ("T") and VSOP ("V") variants where pin 1 is NC. Mechanical dimensions conform to JEDEC MS-016 Variation AE.
How does AT49F001ANT-55JU indicate completion of a byte programming cycle?
AT49F001ANT-55JU offers two hardware methods: DATA polling (I/O7 returns complement of loaded data until completion, then true data) and toggle-bit detection (I/O6 toggles between 0 and 1 during operation, then stabilizes). Both are usable at any point during the cycle and eliminate reliance on fixed timing delays - a key advantage for deterministic firmware design.
What is the maximum number of program/erase cycles guaranteed for AT49F001ANT-55JU?
The AT49F001ANT-55JU guarantees a minimum of 10,000 program/erase cycles per block, as stated in the Features section and validated across the industrial temperature range. This endurance rating applies to all sectors - boot, parameter, and main memory - and is measured under standard 5V operation with proper command sequencing and timing compliance.
AT49F001ANT-55JU 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:
- 55 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)
AT49F001ANT-55JU FAQ
1.How can I place an order for AT49F001ANT-55JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001ANT-55JU 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 AT49F001ANT-55JU reliable?
The price and inventory of AT49F001ANT-55JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001ANT-55JU is usually 5 days.
3.What payment methods are accepted for AT49F001ANT-55JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001ANT-55JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001ANT-55JU?
AT49F001ANT-55JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001ANT-55JU 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 AT49F001ANT-55JU?
For technical support, including AT49F001ANT-55JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001ANT-55JU requirements.
6.How does Aetrix verify that AT49F001ANT-55JU is sourced from the original manufacturer or authorized distributors?
All AT49F001ANT-55JU 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 AT49F001ANT-55JU meets industry standards.
7.What is the process for return or replacement of AT49F001ANT-55JU?
All AT49F001ANT-55JU units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001ANT-55JU, 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 AT49F001ANT-55JU part is unused and in its original packaging.
Return procedure for AT49F001ANT-55JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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