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Microchip Technology AT49F001A-55TI
- Part No.:
- AT49F001A-55TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001A-55TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49F001A-55TI from Atmel is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory with 55 ns read access time, 30 µs typical byte programming, and sector-based erase architecture including a 16K-byte boot block with programmable lockout. 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 AT49F001A-55TI datasheet, AT49F001A-55TI pinout, AT49F001A-55TI application, or AT49F001A-55TI equivalent, key selection considerations include its 55 ns read timing, boot-block write protection, 3-second chip erase, CMOS standby current of 50 µA, and compatibility with standard EPROM-like bus interface (CE/OE/WE control).
Technical Context
The AT49F001A-55TI implements a sector-architected Flash array with one 16K-byte boot block (address range 1C000H–1FFFFH), two 8K-byte parameter blocks, and two main memory blocks (32K + 64K bytes). Its command-set-driven operation uses six-byte sequences for chip/sector erase and four-byte sequences for byte programming, all executed with 5V-only signaling.
Hardware data protection includes VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low, CE high, or WE high blocks writes). End-of-program detection is supported via DATA polling (I/O7 complement toggle) and Toggle Bit (I/O6 toggling).
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 microcontrollers. |
| Read Access Time | 55 ns max - enables direct execution from Flash in systems with ≤18 MHz bus clocks. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small configuration or calibration data segments. |
| Chip Erase Time | 3 seconds max - enables full reprogramming within tight production or service window constraints. |
| Standby Current | 50 µA CMOS - suitable for battery-backed or low-power sleep-mode applications. |
| Endurance | 10,000 program/erase cycles - validated for long-term use in industrial firmware update cycles. |
| Operating Voltage | 5.0 V ±10% - eliminates need for external voltage translators in legacy 5V logic systems. |
Pinout & Package
AT49F001A-55TI is packaged in a 32-lead TSOP (Type I, 8 × 20 mm, package code 32T), compliant with JEDEC MO-142 Variation BD. Pin 1 is marked by a notch or dot; pin 9 is NC (no connect) per datasheet note.
| 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 during command entry. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access; dual-control prevents bus contention. |
| OE | Output Enable | Active-low output gate; high-Z state when high, enabling shared data bus operation. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit multiplexed data path for reads, byte programming, and command/data loading; supports DATA polling on I/O7 and Toggle Bit on I/O6. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12V pulse overrides boot-block lockout (enabled on AT49F001A-55TI). |
| VCC / GND | Power Supply | 5V supply and ground pins; decoupling required near VCC pin to maintain <3.8V VCC-sense threshold during fast transitions. |
| NC | No Connect | Pin 9 is unconnected - must be left floating or tied to GND; not usable as control or signal line. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16K-byte boot sector (1C000H–1FFFFH) can be permanently write-protected via command sequence, securing bootloader code while allowing runtime updates to application sectors. |
| 5V-Only In-System Reprogrammability | Eliminates need for 12V programming supplies or external programmers; supports field firmware upgrades using standard system bus signals. |
| DATA Polling & Toggle Bit Detection | Enables software-driven end-of-program/erase verification without timers or external hardware - reduces host CPU overhead and simplifies driver design. |
| Hardware Data Protection | VCC sensing, noise filtering, and control-line inhibit prevent accidental writes during power transients or EMI events - critical for reliability in industrial environments. |
| Standard EPROM-Compatible Interface | Uses CE/OE/WE control logic identical to EPROMs, enabling drop-in replacement in legacy designs without bus controller modification. |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Storing boot loader and application firmware in programmable logic controllers deployed in factory automation systems. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed boot integrity; 55 ns read access supports real-time instruction fetch from Flash. Use Value: Boot block lockout prevents corruption of safety-critical startup routines during over-the-air updates to application partitions. |
Use Scenario: Holding configuration data and diagnostic firmware in automotive BCMs operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Field-upgradable parameter memory; sector erase enables independent update of lighting profiles vs. door-lock logic. Use Value: 50 µA standby current extends battery life during vehicle sleep mode; 10,000-cycle endurance matches vehicle lifetime requirements. |
| Medical Device Boot Image | Networking Equipment Configuration |
|
Use Scenario: Secure storage of certified boot images in FDA-regulated medical instruments requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Write-protected boot memory; RESET pin 12V override allows authorized reprogramming during service calibration. Use Value: Hardware-enforced boot block lockout meets IEC 62304 software safety requirements for locked bootloader integrity. |
Use Scenario: Storing MAC addresses, VLAN tables, and feature license keys in enterprise switches and routers. IC Role / Device Role / Timing Role: Parameter block storage (two 8K-byte sections); independent sector erase avoids full device reflash during minor config changes. Use Value: 30 µs byte programming enables rapid key updates during provisioning; 5V-only operation simplifies power domain design. |
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; 55 ns access; 3.0–3.6V core, 5V I/O; no boot-block lockout; requires 12V for reset override. | Lacks dedicated boot sector protection; requires level-shifting for 5V bus interfacing. | Choose if migrating to 3.3V core systems with mixed-voltage I/O; avoid when boot-block security is mandatory. |
| SST39VF010-55-4C-NHE | 32-pin TSOP; 55 ns access; 3.3V only; no RESET pin; boot-block lockout implemented via software command only. | No hardware RESET override; incompatible with 5V-only systems; smaller 64K × 16 organization. | Select for cost-sensitive 3.3V designs where 12V override is unnecessary and pin count must match AT49F001A-55TI. |
Compared with AM29LV001BT-55REI and SST39VF010-55-4C-NHE, the AT49F001A-55TI uniquely combines 5V-only operation, hardware-reset-enabled boot-block override, and TSOP-32 pinout - making it optimal for legacy 5V industrial systems requiring secure, field-upgradable firmware storage.
Availability
AT49F001A-55TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, medical device boot image retention, networking equipment configuration, and embedded system BIOS applications requiring stable component supply and long-term lifecycle support.
Supply support for AT49F001A-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) is a semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication devices.
The AT49F001A product line delivers 5V-only Flash memory optimized for in-system reprogrammability in industrial and automotive applications where robustness, boot-code security, and legacy 5V bus compatibility are essential.
FAQ
What is the boot block address range for AT49F001A-55TI?
The boot block for AT49F001A-55TI occupies address range 1C000H to 1FFFFH (16K bytes), distinct from the AT49F001A(N) variant which uses 00000H–03FFFH. This layout places the protected region at the top of the memory map, facilitating secure bootloader placement. The AT49F001A-55TI datasheet confirms this mapping in the "Sector Erase" and "Boot Block Programming Lockout" sections.
Does AT49F001A-55TI support hardware reset override of boot block lockout?
Yes, AT49F001A-55TI supports hardware override: applying 12.0V ± 0.5V to the RESET pin temporarily disables boot block protection, enabling chip/sector erase or byte programming of the locked region. This feature is explicitly documented for the AT49F001A(N)T family and is not available on the AN(T) variants. The AT49F001A-55TI implements this capability per its ordering code suffix "T".
What is the maximum erase time for a full chip erase on AT49F001A-55TI?
The maximum chip erase time for AT49F001A-55TI is 5 seconds, with a typical value of 3 seconds. This is specified in the "Program Cycle Characteristics" table under parameter tEC. During erase, ICC rises to 70 mA, and all commands are ignored until completion. The AT49F001A-55TI datasheet confirms this timing applies to both chip and sector erase operations.
How does AT49F001A-55TI detect end-of-program without external timing?
AT49F001A-55TI provides two hardware-supported detection methods: DATA polling (reading the programmed byte returns its complement on I/O7 until complete) and Toggle Bit (I/O6 toggles between 0 and 1 during programming and stops upon completion). Both are usable at any point during the cycle and eliminate need for fixed delay loops. These mechanisms are defined in the "DATA POLLING" and "TOGGLE BIT" sections of the AT49F001A-55TI datasheet.
Is pin 9 on AT49F001A-55TI functional or no-connect?
Pin 9 on AT49F001A-55TI is a no-connect (NC) terminal, as confirmed in the "Pin Configurations" section and footnote * on page 1 of the AT49F001A(N)(T) datasheet. It must remain unconnected or tied to GND - driving or loading this pin may cause undefined behavior. This NC status applies specifically to the TSOP (32T) package used by AT49F001A-55TI.
AT49F001A-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
AT49F001A-55TI FAQ
1.How can I place an order for AT49F001A-55TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001A-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 AT49F001A-55TI reliable?
The price and inventory of AT49F001A-55TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001A-55TI is usually 5 days.
3.What payment methods are accepted for AT49F001A-55TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001A-55TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001A-55TI?
AT49F001A-55TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001A-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 AT49F001A-55TI?
For technical support, including AT49F001A-55TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001A-55TI requirements.
6.How does Aetrix verify that AT49F001A-55TI is sourced from the original manufacturer or authorized distributors?
All AT49F001A-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 AT49F001A-55TI meets industry standards.
7.What is the process for return or replacement of AT49F001A-55TI?
All AT49F001A-55TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001A-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 AT49F001A-55TI part is unused and in its original packaging.
Return procedure for AT49F001A-55TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001A-55TI Tags
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