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Microchip Technology AT49F001AN-55TI
- Part No.:
- AT49F001AN-55TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001AN-55TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,743
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Product details
Overview
AT49F001AN-55TI 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, and sector architecture comprising one 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). It supports byte-by-byte programming at 30 µs/byte and features hardware data protection, DATA polling, and CMOS standby current of 50 µA - used in embedded firmware storage for industrial controllers requiring field-upgradable code.
For engineers reviewing the AT49F001AN-55TI datasheet, AT49F001AN-55TI pinout, AT49F001AN-55TI application, or AT49F001AN-55TI equivalent, key selection criteria include boot block lockout capability, 55 ns read timing compliance, TSOP-32 package compatibility, sector erase granularity, and 5V-only operation without high-voltage programming circuitry.
Technical Context
The AT49F001AN-55TI implements a standard parallel Flash interface with CE/OE/WE control logic and internal command register-based programming. Its sector architecture isolates boot code (16K bytes at 1C000H–1FFFFH) from parameter and main memory blocks, enabling secure firmware initialization and selective updates.
Hardware data protection includes VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low, CE high, or WE high blocks writes). The device lacks RESET-based boot override - unlike AT49F001A(T) variants - confirming its fixed lockout behavior once enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - supports full firmware images for 8-bit microcontrollers with minimal external address decoding. |
| Read Access Time | 55 ns - meets timing requirements for 18 MHz bus interfaces without wait states in industrial microcontroller systems. |
| Chip Erase Time | 3 seconds maximum - enables rapid firmware recovery during production programming or field updates. |
| Byte Programming Time | 30 µs typical - allows efficient patching of configuration data or small code segments without full-block overhead. |
| Standby Current | 50 µA CMOS - reduces power budget in always-on embedded systems such as remote sensors or HMI panels. |
| End-of-Write Detection | DATA polling on I/O7 - eliminates need for fixed delay timers in host firmware, improving write reliability across voltage/temperature variation. |
| Boot Block Protection | 16K-byte region (1C000H–1FFFFH) with permanent lockout via command sequence - prevents accidental corruption of bootloader code during application updates. |
Pinout & Package
AT49F001AN-55TI is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, 8 × 20 mm, type 1), compliant with JEDEC MO-142 BD. Pin 9 is NC (no connect); all other pins match standard parallel Flash interface mapping.
| 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 per datasheet note. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; controls device participation on shared data bus. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention during reads; high-Z when deasserted. |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences; inhibited if high during read mode. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read, program, and identification operations; supports DATA polling on I/O7 and toggle bit on I/O6. |
| VCC | Power Supply | +5.0 V ±10% supply; powers core logic and I/O buffers; VCC sense disables programming below 3.8 V. |
| GND | Ground Reference | Signal and power return; required for stable read/write margins and noise immunity per AC timing specs. |
| RESET | Reset Input | Active-low reset; forces outputs to high-Z and halts ongoing operations; no boot override capability (NC function per datasheet). |
| NC (Pin 9) | No Connect | Unbonded pin in TSOP package; must be left floating or tied to GND/VCC per board layout best practices - no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | Enables secure bootloader storage (16K bytes at 1C000H–1FFFFH) and independent update of parameter/main memory blocks without risking system startup integrity. |
| 5V-Only Reprogrammability | Eliminates need for external 12V programming supplies or charge pumps - simplifies PCB design and reduces BOM cost in industrial control modules. |
| DATA Polling & Toggle Bit | Provides deterministic end-of-write detection using standard I/O pins (I/O7/I/O6), removing dependency on fixed timing loops or external status signals. |
| Hardware Data Protection | Three-layer safeguard (VCC sense, control-line inhibit, noise filtering) prevents spurious writes during power transients or EMI events in noisy factory environments. |
| Low-Power Standby Mode | 50 µA CMOS standby current extends battery life in backup-powered applications such as real-time clock modules or tamper-detection circuits. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware and calibration tables in programmable logic controllers deployed in factory automation lines with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Nonvolatile code storage with 55 ns read access synchronized to 16-bit microcontroller bus cycles; boot block holds certified safety startup routines. Use Value: Sector erase allows field updates of application logic without overwriting validated bootloader, maintaining functional safety certification (IEC 61508). |
Use Scenario: Retaining patient-specific calibration data and regulatory-compliant firmware versions in portable diagnostic equipment requiring traceable data integrity. IC Role / Device Role / Timing Role: Parameter block (8K × 2) stores user-configurable thresholds and device serial history; boot block contains FDA-cleared boot code. Use Value: Hardware lockout prevents unauthorized modification of boot code during service, satisfying medical device cybersecurity requirements (IEC 82304-1). |
| Automotive Body Control Module | Telecom Base Station Management EEPROM |
Use Scenario: Holding vehicle-specific configuration maps (e.g., door lock timing, lighting profiles) in body control units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Main memory block (96K bytes total) stores adaptive parameters updated via CAN diagnostics; 10,000-cycle endurance supports lifetime recalibration. Use Value: Fast 30 µs byte programming enables real-time tuning during dealer service sessions without full module replacement. |
Use Scenario: Storing FPGA configuration bitstreams and hardware revision metadata in telecom infrastructure cards where hot-swap capability demands fast, reliable nonvolatile storage. IC Role / Device Role / Timing Role: Parallel interface provides higher throughput than I²C/SPI EEPROMs for loading 128K-bit configuration data; TSOP package fits dense PCB layouts. Use Value: 55 ns read access ensures sub-microsecond FPGA startup latency, critical for meeting 5G base station synchronization windows. |
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 | 3.3V core with 5V I/O tolerance; 55 ns read; boot block at top/bottom selectable; no RESET pin. | Requires level-shifting for pure 5V systems; lacks hardware reset control for fail-safe abort during erase. | Choose for mixed-voltage designs where 3.3V logic coexists with 5V peripherals. |
| SST39VF010-55-4C-NHE | 5V-only; 55 ns read; 1 Mbit; single power supply; no boot block lockout feature. | Boot code protection requires external software management; higher risk of accidental overwrite during field updates. | Choose when boot security is handled at application layer and lower cost is prioritized over hardware lockout. |
Compared with AM29LV001BT-55REI and SST39VF010-55-4C-NHE, the AT49F001AN-55TI uniquely combines 5V-only operation, dedicated hardware-enforced boot block lockout, and TSOP-32 packaging - making it optimal for cost-sensitive, safety-critical industrial firmware storage where pin compatibility and deterministic protection are mandatory.
Availability
AT49F001AN-55TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive body control modules, telecom base station management, and embedded bootloader applications requiring stable component supply across extended temperature ranges.
Supply support for AT49F001AN-55TI 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, designs high-reliability nonvolatile memory and microcontroller solutions for industrial, automotive, and communications markets.
The AT49F001A(N)(T) family delivers 5V-only Flash memory optimized for in-system reprogrammability in resource-constrained embedded systems where firmware integrity, low-power standby, and sector-level update flexibility are essential.
FAQ
What is the boot block address range for AT49F001AN-55TI?
The boot block for AT49F001AN-55TI occupies addresses 1C000H to 1FFFFH (16K bytes), as confirmed in the "Notes" section of the datasheet for AT49F001A(N)T variants. This differs from the AT49F001A(N) version, which places the boot block at 00000H–03FFFH. The AT49F001AN-55TI adheres to the T-series mapping, ensuring correct bootloader placement in memory-constrained systems.
Does AT49F001AN-55TI support RESET-based boot block override?
No, AT49F001AN-55TI does not support RESET-based boot block override. The datasheet explicitly states "The RESET feature is not available for the AT49F001AN(T)" and "This feature is not available on the AT49F001AN(T)". Unlike AT49F001A(T) variants, AT49F001AN-55TI lacks the 12V override capability, making boot block lockout irreversible once enabled.
What package type is used for AT49F001AN-55TI?
AT49F001AN-55TI uses the 32-lead Plastic Thin Small Outline Package (TSOP), designated as package code "32T" (8 × 20 mm, Type I, JEDEC MO-142 BD). Pin 9 is NC, consistent with the AT49F001A(N)(T) family specification, and the package supports surface-mount assembly in high-density industrial PCBs.
How many program/erase cycles does AT49F001AN-55TI guarantee?
AT49F001AN-55TI guarantees a minimum of 10,000 program/erase cycles, as stated in the "Features" section and confirmed in the "Device Operation" text: "The typical number of program and erase cycles is in excess of 10,000 cycles." This endurance rating applies to all sectors including boot, parameter, and main memory blocks under specified operating conditions.
Is DATA polling supported on AT49F001AN-55TI, and how is it implemented?
Yes, AT49F001AN-55TI supports DATA polling on I/O7: during byte programming, reading the last loaded address returns the complement of the written data on I/O7; when programming completes, true data appears. This mechanism is documented in the "DATA POLLING" section and verified in the "Data Polling Waveforms" figure, enabling host firmware to detect completion without fixed delays.
AT49F001AN-55TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- 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-TSOP
AT49F001AN-55TI FAQ
1.How can I place an order for AT49F001AN-55TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001AN-55TI 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 AT49F001AN-55TI reliable?
The price and inventory of AT49F001AN-55TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001AN-55TI is usually 5 days.
3.What payment methods are accepted for AT49F001AN-55TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001AN-55TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001AN-55TI?
AT49F001AN-55TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001AN-55TI 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 AT49F001AN-55TI?
For technical support, including AT49F001AN-55TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001AN-55TI requirements.
6.How does Aetrix verify that AT49F001AN-55TI is sourced from the original manufacturer or authorized distributors?
All AT49F001AN-55TI 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 AT49F001AN-55TI meets industry standards.
7.What is the process for return or replacement of AT49F001AN-55TI?
All AT49F001AN-55TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001AN-55TI, 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 AT49F001AN-55TI part is unused and in its original packaging.
Return procedure for AT49F001AN-55TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001AN-55TI Tags
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