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Microchip Technology AT49F001A-45TI
- Part No.:
- AT49F001A-45TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001A-45TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,672
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Product details
Overview
AT49F001A-45TI from Atmel is a 1 Mbit (128K × 8) 5V-only in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded controllers, BIOS firmware, and industrial control systems. It delivers 45 ns read access time, supports byte-by-byte programming at 30 µs/byte, features sector-based erase architecture with boot block lockout, and operates across the industrial temperature range (–40°C to +85°C).
For engineers reviewing the AT49F001A-45TI datasheet, AT49F001A-45TI pinout, AT49F001A-45TI application, or AT49F001A-45TI equivalent, this page provides verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts for firmware storage design, legacy system replacement, and industrial MCU boot memory selection.
Technical Context
The AT49F001A-45TI implements a CMOS-based Flash memory architecture with dedicated boot block (16K bytes), two parameter blocks (8K bytes each), and two main memory blocks (32K and 64K bytes). Its command-set-driven operation uses standard microprocessor timing with CE/OE/WE control lines and supports hardware reset-triggered boot block override at 12 V.
It integrates internal program control logic, DATA polling and toggle-bit status detection, VCC sense protection (<3.8 V inhibits programming), and noise filtering on WE/CE inputs. The device enters high-impedance output state when CE or OE is high, enabling bus contention avoidance in shared-memory systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for full BIOS images or MCU boot loaders in space-constrained designs. |
| Read Access Time | 45 ns maximum - enables direct execution from flash (XIP) in 20 MHz+ microcontroller systems without wait states. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of configuration parameters or firmware patches without long downtime. |
| Erase Cycle Time | 3 seconds typical for full chip erase - supports efficient firmware revision management during production or service. |
| Operating Voltage | 5.0 V ±10% - compatible with legacy 5V TTL/CMOS buses and eliminates need for voltage translators. |
| Standby Current | 50 µA CMOS - reduces power consumption in always-on industrial monitoring nodes during idle periods. |
| Endurance | 10,000 program/erase cycles - ensures reliable field reprogramming over multi-year product lifecycles. |
| Temperature Range | –40°C to +85°C - qualified for deployment in industrial automation, automotive body control, and telecom infrastructure. |
Pinout & Package
AT49F001A-45TI is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP), Type I, 8 mm × 20 mm footprint (JEDEC MO-142, Variation BD), with gull-wing leads and pin 1 marked by notch or dot.
| 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 sequences. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device selection on shared bus. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, preventing bus contention during multiplexed operation. |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase commands; combined with CE for command sequencing. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; carries command codes, address latches, and data during programming; outputs complemented data during polling. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override (functional on AT49F001A-45TI). |
| VCC | Power Supply | +5.0 V supply; internally regulated for programming; VCC sense circuit disables writes if voltage drops below 3.8 V. |
| GND | Ground | Reference return path for all signals and power; decoupling capacitor required near VCC pin per layout guidelines. |
| NC | No Connect | Pin 9 in TSOP package is unconnected - must remain floating; not bonded internally and has no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | One 16K-byte boot block (1C000H–1FFFFH), two 8K-byte parameter blocks, and two main memory blocks (32K/64K) - enables selective firmware update without erasing critical boot code. |
| Boot Block Lockout | Hardware-enforced write protection for boot sector; activated via 6-cycle command sequence; prevents accidental corruption of startup firmware in deployed systems. |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin temporarily disables boot block lockout - allows emergency reprogramming of protected sectors without hardware modification. |
| Status Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6 toggling) provide software-controlled end-of-program/erase confirmation - eliminates need for fixed delay timers in host firmware. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and triple-line inhibit (OE low / CE high / WE high) prevent spurious writes during power transients or EMI events. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Memory |
|---|---|
|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in programmable logic controllers requiring field-upgradable nonvolatile memory. IC Role / Device Role / Timing Role: Primary boot and application code storage device; accessed via parallel bus during cold start and runtime updates. Use Value: 45 ns read speed enables deterministic scan cycle timing; sector erase allows updating control algorithms without resetting safety-critical I/O modules. |
Use Scenario: Replacing obsolete EPROMs in desktop motherboard BIOS chips where 5V-only operation and in-system reprogrammability are required. IC Role / Device Role / Timing Role: Nonvolatile firmware repository mapped into CPU address space; supports hot-flash capability via chipset-compatible command interface. Use Value: Boot block lockout preserves POST routines while allowing parameter block updates; 10,000-cycle endurance supports multiple BIOS revisions over product lifetime. |
| Automotive Body Control Module | Medical Device Configuration Storage |
|
Use Scenario: Holding calibration data, fault logs, and feature-enable flags in vehicle door modules operating across extended temperature ranges. IC Role / Device Role / Timing Role: Parameter memory accessed by 8-bit microcontroller over parallel interface; erased/rewritten during dealer service procedures. Use Value: Industrial temp rating (–40°C to +85°C) ensures reliability under hood conditions; 50 µA standby current extends battery life in sleep mode. |
Use Scenario: Storing FDA-compliant device settings, user preferences, and audit trail metadata in portable diagnostic equipment with strict data integrity requirements. IC Role / Device Role / Timing Role: Secure configuration store with write-protection enforced at hardware level; accessed only during authorized maintenance sessions. Use Value: 12 V RESET override enables certified recalibration without board removal; hardware lockout prevents unauthorized firmware tampering during clinical use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV001BT-45EI | 1 Mbit, 45 ns, 3.0 V core / 5.0 V I/O; supports 3V read/write; lacks 12 V RESET override and boot block lockout override. | Preferred for mixed-voltage systems; unsuitable where boot block reprogramming under lockout is required. | Select when migrating to lower-power 3V domains; verify compatibility with existing 5V bus timing and command set. |
| MX29LV001CTTI-45G | 1 Mbit, 45 ns, 3.0 V core / 5.0 V I/O; includes CFI-compliant command set; no hardware RESET override for boot block. | Better suited for standardized CFI-based programmers; requires different initialization sequence than AT49F001A-45TI. | Choose for new designs needing CFI compliance and broader toolchain support; avoid for drop-in AT49F001A-45TI replacements. |
Compared with AM29LV001BT-45EI and MX29LV001CTTI-45G, the AT49F001A-45TI uniquely supports 12 V–triggered boot block override and Atmel-specific command sequences - making it irreplaceable in legacy systems relying on that hardware recovery mechanism.
Availability
AT49F001A-45TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS replacement, and automotive body control module applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49F001A-45TI 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, nonvolatile memory, and secure authentication devices.
The AT49F001A series was designed as a 5V-only Flash memory solution for embedded systems requiring in-system reprogrammability, robust boot code protection, and industrial-grade reliability - targeting legacy industrial, computing, and automotive applications.
FAQ
What is the boot block address range for AT49F001A-45TI?
The boot block for AT49F001A-45TI occupies address range 1C000H to 1FFFFH (16K bytes). This differs from the base AT49F001A variant (00000H–03FFFH) and is explicitly defined in the datasheet's sector mapping table. The AT49F001A-45TI uses the "T" suffix designation confirming this top-aligned boot sector layout.
Does AT49F001A-45TI support 12 V programming override on the RESET pin?
Yes, AT49F001A-45TI supports 12 V ±0.5 V applied to the RESET pin to temporarily disable boot block lockout and enable reprogramming. This feature is explicitly documented in the "Boot Block Programming Lockout Override" section and is functional only on "T"-suffix variants - not on "N" or "ANT" versions where RESET is NC.
What package type is used for AT49F001A-45TI?
AT49F001A-45TI uses a 32-lead Plastic Thin Small Outline Package (TSOP), Type I, measuring 8 mm × 20 mm (JEDEC MO-142, Variation BD). Pin 1 is identified by a notch or dot; pin 9 is a no-connect terminal and must remain unconnected on the PCB.
How does DATA polling work on AT49F001A-45TI?
During byte programming, reading the last loaded address returns the complement of the programmed data on I/O7. Once programming completes, true data appears on all I/O lines. This allows host firmware to poll I/O7 without fixed delays - a key timing optimization for real-time embedded systems using AT49F001A-45TI.
Is AT49F001A-45TI compatible with standard EPROM socket footprints?
No, AT49F001A-45TI in TSOP package is not socket-compatible with standard DIP or PLCC EPROMs. It requires a custom PCB footprint matching the 32T mechanical drawing (8 × 20 mm, 0.5 mm pitch). For socket-based upgrades, the PLCC variant AT49F001A-45JI would be required instead of AT49F001A-45TI.
AT49F001A-45TI 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:
- 45 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-45TI FAQ
1.How can I place an order for AT49F001A-45TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001A-45TI 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-45TI reliable?
The price and inventory of AT49F001A-45TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001A-45TI is usually 5 days.
3.What payment methods are accepted for AT49F001A-45TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001A-45TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001A-45TI?
AT49F001A-45TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001A-45TI 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-45TI?
For technical support, including AT49F001A-45TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001A-45TI requirements.
6.How does Aetrix verify that AT49F001A-45TI is sourced from the original manufacturer or authorized distributors?
All AT49F001A-45TI 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-45TI meets industry standards.
7.What is the process for return or replacement of AT49F001A-45TI?
All AT49F001A-45TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001A-45TI, 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-45TI part is unused and in its original packaging.
Return procedure for AT49F001A-45TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001A-45TI Tags
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AT24C02C-XHM-T
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