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Microchip Technology AT49F001ANT-55JI
- Part No.:
- AT49F001ANT-55JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49F001ANT-55JI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,333
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Product details
Overview
AT49F001ANT-55JI from Atmel is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory with 55 ns read access time, 3-second chip erase cycle, 30 µs/byte programming, and hardware data protection including VCC sense and noise filtering. It features sector architecture with one 16K-byte boot block (address range 1C000H–1FFFFH), two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes), used in embedded firmware storage for industrial microcontroller systems.
For engineers reviewing the AT49F001ANT-55JI datasheet, AT49F001ANT-55JI pinout, AT49F001ANT-55JI application, or AT49F001ANT-55JI equivalent, this page delivers verified electrical specs, PLCC-32 package layout, boot-block lockout behavior, DATA polling and toggle-bit status detection, and real-world use cases in firmware update-capable controllers.
Technical Context
The AT49F001ANT-55JI implements a command-register-based programming architecture requiring six-bus-cycle sequences for chip/sector erase and boot lockout enable, with address latching on falling WE/CE edges and data latching on rising edges. Its internal program control logic eliminates external high-voltage generators and supports standard microprocessor timing.
It uses CMOS standby current <50 µA and active current ≤20 mA at 5 MHz, with hardware safeguards: VCC sense inhibits programming below 3.8 V, OE low/CE high/WE high disables writes, and 15 ns noise filter rejects spurious pulses on WE/CE. The RESET pin enables boot-block override at 12 V - a feature present only in the T-suffix variant (not AN).
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 MCU systems. |
| Read Access Time | 55 ns max - meets timing requirements for 16–20 MHz bus interfaces without wait states. |
| Byte Programming Time | 30 µs typical - enables rapid field updates of small firmware patches without system downtime. |
| Chip Erase Time | 3 seconds max - allows full memory reset during manufacturing or recovery without external tools. |
| End-of-Write 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 region (1C000H–1FFFFH) with lockout via 6-cycle command sequence; override possible only via 12 V on RESET - ensures secure bootloader integrity. |
| Power Dissipation | 110 mW active (20 mA @ 5.5 V), 250 µW standby (50 µA @ 5 V) - suitable for always-on industrial controllers with thermal constraints. |
Pinout & Package
AT49F001ANT-55JI is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE, with 1.27 mm pitch, 12.45 mm × 14.95 mm body, and pin 1 identifier notch. Pin 1 is NC (no connect) for this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A11–A16 are don't-care in some command cycles. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read; controls device selection in multi-chip memory maps. |
| OE | Output Enable | Active-low output gate; high-Z when high, enabling bus sharing with other peripherals without contention. |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences; noise-filtered against <15 ns glitches. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot-block override - unique to T-suffix variants. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read data output and program data input; supports DATA polling (I/O7) and toggle-bit (I/O6) status monitoring. |
| VCC | Power Supply | +5 V ±10% supply; internal VCC sense circuitry disables programming if voltage drops below 3.8 V. |
| GND | Ground | Reference for all I/O and internal logic; decoupling capacitor required near VCC pin per layout guidelines. |
| NC | No Connect | Pin 1 is NC in PLCC package for AT49F001ANT; must remain unconnected to avoid functional interference. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | Enables secure bootloader storage (16K bytes at 1C000H–1FFFFH) that remains immutable under normal 5 V operation - critical for certified firmware integrity. |
| 5 V–Only Reprogrammability | Eliminates need for 12 V programming supplies or external charge pumps - simplifies PCB design and reduces BOM cost in embedded systems. |
| Hardware Data Protection | VCC sense, WE/CE noise filtering, and control-line inhibit logic prevent accidental writes - essential for field-upgrade reliability in noisy industrial environments. |
| DATA Polling & Toggle-Bit Status | Allows host MCU to detect write completion without fixed delays or external clocks - improves firmware update efficiency and deterministic timing. |
| Standard EPROM-Compatible Interface | Uses CE/OE/WE control lines identical to EPROMs - enables drop-in replacement in legacy designs without logic redesign or timing recalculations. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing boot code and calibration tables in programmable logic controllers deployed in factory automation environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with fast 55 ns read access and hardware write protection - ensures deterministic boot timing and immunity to power glitches. Use Value: Boot block lockout prevents corruption of safety-critical startup routines during field firmware updates; 10,000-cycle endurance supports lifetime field reprogramming. |
Use Scenario: Holding certified bootloader and device-specific configuration in Class II medical instruments requiring traceable, tamper-resistant firmware storage. IC Role / Device Role / Timing Role: Secure, reprogrammable memory with 12 V RESET override capability - enables authorized service personnel to recover corrupted boot sectors while maintaining regulatory compliance. Use Value: Hardware-level VCC sensing and noise filtering meet IEC 60601-1 immunity requirements; PLCC package supports manual rework and long-term component availability. |
| Telecom Base Station Configuration | Automotive Body Control Module (BCM) |
Use Scenario: Storing network parameter sets and protocol stacks in remote telecom nodes where over-the-air updates require reliable, sector-erasable nonvolatile memory. IC Role / Device Role / Timing Role: Sector-erasable Flash with independent 8K-byte parameter blocks - enables atomic updates of configuration subsets without erasing operational firmware. Use Value: 3-second chip erase and 30 µs/byte programming reduce update window duration; DATA polling minimizes host CPU polling overhead. |
Use Scenario: Retaining vehicle-specific calibration data and diagnostic logs in automotive BCMs operating across -40°C to +85°C ambient conditions. IC Role / Device Role / Timing Role: Industrial-grade Flash with 50 µA CMOS standby current and 20 mA active draw - extends battery life during sleep modes while supporting fast wake-up reads. Use Value: PLCC-32 package provides mechanical robustness against thermal cycling; boot block protection isolates critical CAN initialization code from routine parameter updates. |
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 | 3 V core with 5 V I/O tolerance; 55 ns access; 1 Mbit density; no RESET-based boot override. | Requires level-shifting for pure 5 V systems; lacks 12 V boot unlock - unsuitable for recovery-critical deployments. | Select only if migrating to 3 V system architecture; verify compatibility with existing 5 V bus timing and voltage margins. |
| MX29LV001CTTI-55G | 5 V-only; 55 ns access; same 1 Mbit density and PLCC-32 package; boot block at 00000H–03FFFH (not 1C000H–1FFFFH). | Different boot sector address mapping requires firmware linker script adjustment; no 12 V RESET override. | Use for cost-sensitive replacements where boot address relocation is acceptable and 12 V override is unnecessary. |
Compared with AM29LV001BT-55REI and MX29LV001CTTI-55G, the AT49F001ANT-55JI uniquely combines 5 V-only operation, 12 V RESET-enabled boot recovery, and industrial-temperature PLCC packaging - making it optimal for legacy 5 V embedded systems requiring field-serviceable firmware security.
Availability
AT49F001ANT-55JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for AT49F001ANT-55JI 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 semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for industrial, automotive, and IoT applications.
The AT49F001A(N)(T) family was designed as 5 V–only in-system reprogrammable Flash memory for embedded systems requiring secure, sector-erasable nonvolatile storage with minimal external support circuitry.
FAQ
What is the boot block address range for AT49F001ANT-55JI?
The AT49F001ANT-55JI has its 16K-byte boot block located at address range 1C000H to 1FFFFH. This differs from the base AT49F001A(N) variant (00000H–03FFFH) and is confirmed in the device's sector map and command definitions table. The AT49F001ANT-55JI uses this upper-address boot sector to isolate critical startup code from main application memory.
Does AT49F001ANT-55JI support 12 V programming or only 5 V operation?
The AT49F001ANT-55JI operates exclusively at 5 V for read, program, and erase functions - no high-voltage programming supply is needed. However, applying 12 V ±0.5 V to the RESET pin enables boot block override, allowing reprogramming even when lockout is active. This 12 V function is specific to the T-suffix variant and is not a general programming mode.
How does hardware data protection work in AT49F001ANT-55JI?
AT49F001ANT-55JI implements three hardware protections: (1) VCC sense disables programming if supply drops below ~3.8 V; (2) holding OE low, CE high, or WE high inhibits write cycles; and (3) a 15 ns noise filter rejects short glitches on WE/CE. These features collectively prevent accidental writes during power transients or signal noise - a key reliability requirement in industrial AT49F001ANT-55JI deployments.
Can AT49F001ANT-55JI be used as a direct replacement for AT49F001A-55JI?
No - AT49F001ANT-55JI is not a pin-compatible or functional drop-in replacement for AT49F001A-55JI. While both share PLCC-32 packaging and 55 ns speed grade, the ANT variant includes the RESET-based boot override feature and locates its boot block at 1C000H–1FFFFH, whereas the A variant places it at 00000H–03FFFH. Firmware and hardware design must account for these differences before substitution.
What status detection methods does AT49F001ANT-55JI provide for programming completion?
AT49F001ANT-55JI offers two hardware-supported status detection methods: DATA polling (monitoring I/O7 for complemented data during byte programming) and toggle-bit detection (observing I/O6 toggling until completion). Both operate without external clocks or timers, enabling efficient host MCU firmware that avoids fixed delays - a critical advantage in real-time AT49F001ANT-55JI applications.
AT49F001ANT-55JI 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-55JI FAQ
1.How can I place an order for AT49F001ANT-55JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001ANT-55JI 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-55JI reliable?
The price and inventory of AT49F001ANT-55JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001ANT-55JI is usually 5 days.
3.What payment methods are accepted for AT49F001ANT-55JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001ANT-55JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001ANT-55JI?
AT49F001ANT-55JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001ANT-55JI 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-55JI?
For technical support, including AT49F001ANT-55JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001ANT-55JI requirements.
6.How does Aetrix verify that AT49F001ANT-55JI is sourced from the original manufacturer or authorized distributors?
All AT49F001ANT-55JI 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-55JI meets industry standards.
7.What is the process for return or replacement of AT49F001ANT-55JI?
All AT49F001ANT-55JI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001ANT-55JI, 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-55JI part is unused and in its original packaging.
Return procedure for AT49F001ANT-55JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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