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Microchip Technology AT49F001N-90TI
- Part No.:
- AT49F001N-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001N-90TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,780
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Product details
Overview
AT49F001N-90TI from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 55 ns read access time, 10 µs typical byte programming, 10-second chip erase, hardware data protection, and sector architecture with 16K-byte boot block, two 8K-byte parameter blocks, and two main memory blocks (32K/64K bytes).
For engineers reviewing the AT49F001N-90TI datasheet, AT49F001N-90TI pinout, AT49F001N-90TI application, or AT49F001N-90TI equivalent, this page delivers verified technical context, real-world use cases, pin-level design meaning, and validated alternative options - all grounded in the official AT49F001(N)(T) Rev. 1008D datasheet and Microchip's ordering documentation.
Technical Context
The AT49F001N-90TI implements a command-based Flash architecture requiring six-byte sequences for chip/sector erase and boot lockout enable, with internal timing eliminating external clocks. Its dual-line control (CE/OE) enables bus contention avoidance during read, while WE-controlled write cycles support standard microprocessor timing.
It uses a sector-organized memory map: boot block at 1C000H–1FFFFH (16 KB), parameter blocks at 1A000H–1BFFFH and 18000H–19FFFH (8 KB each), and main memory blocks at 10000H–17FFFH (32 KB) and 00000H–0FFFFH (64 KB). The RESET pin is DC on this variant and not used for boot override.
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 MCUs. |
| Read Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces without wait states. |
| Byte Programming Time | 10 µs typical - enables fast field updates of configuration parameters or calibration data. |
| Chip Erase Time | 10 seconds - allows full memory reset during production programming or recovery procedures. |
| Endurance | 10,000 program/erase cycles - suitable for applications requiring infrequent but reliable firmware updates. |
| Power Dissipation | 275 mW active (55 ns @ 5 V), 100 µA CMOS standby - enables low-power operation in battery-backed systems. |
| Operating Voltage | 5.0 V ±10% - compatible with legacy 5V logic families and eliminates need for charge pumps or dual supplies. |
Pinout & Package
AT49F001N-90TI is supplied in a 32-lead TSOP (Type I, 8 × 20 mm, package code 32T), industrial temperature range (−40°C to +85°C), with pin 1 located at bottom-left corner marked by beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper/lower 64K region. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; latched on rising edge of WE/CE during programming, driven during read. |
| 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 gate; controls data bus tristate to prevent contention on shared buses. |
| WE | Write Enable | Active-low write strobe; initiates command loading, byte programming, or sector erase on falling/rising edges. |
| RESET | Reset Input | DC input (not functional for boot override); forces outputs to high-Z and halts ongoing operations when pulled low. |
| VCC | Power Supply | +5.0 V ±10% supply; powers core logic and memory array; requires local 0.1 µF decoupling. |
| GND | Ground Reference | Signal and power ground; must be low-impedance connection to minimize noise coupling into data lines. |
| NC | No Connect | Pin 9 in TSOP package - must remain unconnected per datasheet; floating or tied to GND violates spec. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | Enables permanent protection of 16K-byte boot code (1C000H–1FFFFH) via software command, preventing accidental overwrite during field updates. |
| DATA Polling & Toggle Bit | Allows real-time detection of programming/erase completion without polling timers - reduces host CPU overhead and improves update reliability. |
| Hardware Data Protection | VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low/CE high/WE high blocks writes) prevent spurious writes. |
| 5V-Only Operation | Eliminates need for 12V programming voltage or external high-voltage generators - simplifies system power design and PCB layout. |
| Industrial Temperature Range | Rated for −40°C to +85°C case temperature - suitable for automotive body control modules, industrial PLCs, and outdoor metering equipment. |
Applications
| Embedded Boot Memory | Firmware Configuration Storage |
|---|---|
Use Scenario: Storing bootloader code that initializes MCU peripherals and loads application firmware from external media. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to reset vector address space; accessed within first 90 ns after reset assertion. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates, eliminating risk of bricking due to corrupted startup code. |
Use Scenario: Retaining user-configurable parameters (e.g., calibration offsets, network IDs, display brightness) across power cycles. IC Role / Device Role / Timing Role: Parameter block storage (two 8K-byte sectors) updated via byte programming during runtime; erased only when configuration reset is requested. Use Value: 10 µs/byte programming enables sub-millisecond parameter saves, supporting responsive UI feedback and robust state persistence. |
| Legacy System Code Replacement | Industrial Firmware Field Update |
Use Scenario: Replacing obsolete EPROMs (e.g., 27C010) in existing 5V designs without board redesign. IC Role / Device Role / Timing Role: Pin-compatible Flash memory with identical DIP/PLCC/TSOP footprints and EPROM-like read protocol (CE/OE/WE control). Use Value: 90 ns access time and TTL/CMOS-compatible I/O meet timing margins of legacy 8051 and Z80 systems, enabling drop-in replacement. |
Use Scenario: Remote firmware patching in deployed industrial controllers via serial or CAN interface. IC Role / Device Role / Timing Role: In-system reprogrammable memory partitioned into main blocks (32K/64K) allowing A/B firmware swapping without downtime. Use Value: Sector erase capability enables selective update of application sections while preserving boot and parameter data - reducing update window and flash wear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 3.3V operation, 90 ns access, 1 Mbit density, no boot block lockout; requires level-shifting in 5V systems. | Lacks hardware-protected boot sector; unsuitable where bootloader integrity is critical. | Select only if system already uses 3.3V supply and boot protection is managed in software. |
| MX29LV010CTTI-90G | 3.0–3.6V operation, 90 ns access, 1 Mbit, top-boot sector (16K), supports CFI command set; incompatible voltage domain. | Requires external 5V-to-3.3V regulator and voltage translators; no native 5V compatibility. | Choose only for new 3.3V designs needing CFI-standardized programming tools and broader vendor support. |
Compared with SST39VF010-90-4C-NHE and MX29LV010CTTI-90G, the AT49F001N-90TI provides native 5V operation, hardware-enforced boot block lockout, and direct EPROM replacement capability - making it uniquely suited for legacy industrial upgrades and safety-critical bootloader storage where voltage translation and software-only protection are unacceptable.
Availability
AT49F001N-90TI is available at Aetrix Electronics and suitable for industrial automation controllers, legacy embedded instrumentation, and automotive body electronics requiring stable component supply, long-term lifecycle support, and guaranteed TSOP packaging consistency.
Supply support for AT49F001N-90TI 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
Microchip Technology acquired Atmel in 2016 and maintains full support for the AT49F001 family, including datasheets, errata, and legacy programming tools.
The AT49F001N-90TI belongs to Atmel's early-generation 5V Flash memory product line, designed specifically for cost-sensitive, pin-compatible EPROM replacements in industrial and automotive control systems requiring in-system reprogrammability without high-voltage circuitry.
FAQ
What is the operating temperature range for the AT49F001N-90TI?
The AT49F001N-90TI is rated for industrial operation from −40°C to +85°C (case temperature), as confirmed by the "AT49F001N-90TI" ordering code in the Industrial column of the AT49F001N Ordering Information table (page 15). This makes AT49F001N-90TI suitable for under-hood automotive modules and factory-floor programmable logic controllers where ambient thermal stress exceeds commercial-grade limits.
Does the AT49F001N-90TI support boot block programming lockout?
Yes, the AT49F001N-90TI supports boot block programming lockout. Its boot block resides at address range 1C000H–1FFFFH (16 KB), and the lockout feature is enabled via a documented six-command sequence (AAh/55h/80h/AAh/55h/40h). Once activated, programming and erasure of the boot block are inhibited at ≤5.5 V, ensuring bootloader integrity - a key differentiator of AT49F001N-90TI over generic Flash devices.
What package type is used for the AT49F001N-90TI?
The AT49F001N-90TI uses a 32-lead Plastic Thin Small Outline Package (TSOP), Type I, 8 × 20 mm footprint (package code 32T), as specified in the AT49F001N Ordering Information table (page 15). Pin 9 is designated NC (no connect) and must remain unconnected; the RESET pin is DC and non-functional for boot override in this variant.
How does the AT49F001N-90TI handle end-of-program detection?
The AT49F001N-90TI supports two hardware-assisted end-of-program detection methods: DATA polling (I/O7 complements last written byte until completion) and Toggle Bit (I/O6 toggles during operation and stabilizes upon finish). Both methods eliminate software timing loops and allow immediate initiation of subsequent reads or writes - a critical reliability feature implemented directly in AT49F001N-90TI's control logic.
Is the AT49F001N-90TI pin-compatible with standard EPROMs like the 27C010?
Yes, the AT49F001N-90TI is functionally and pin-compatible with 27C010 EPROMs in read mode: identical 32-pin DIP/PLCC/TSOP footprints, same CE/OE/WE control signaling, and EPROM-like output behavior when deselected. However, AT49F001N-90TI requires command sequences for programming - unlike one-time-programmable EPROMs - and retains data without UV exposure.
AT49F001N-90TI 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:
- 90 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
AT49F001N-90TI FAQ
1.How can I place an order for AT49F001N-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-90TI 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 AT49F001N-90TI reliable?
The price and inventory of AT49F001N-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-90TI is usually 5 days.
3.What payment methods are accepted for AT49F001N-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-90TI?
AT49F001N-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-90TI 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 AT49F001N-90TI?
For technical support, including AT49F001N-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-90TI requirements.
6.How does Aetrix verify that AT49F001N-90TI is sourced from the original manufacturer or authorized distributors?
All AT49F001N-90TI 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 AT49F001N-90TI meets industry standards.
7.What is the process for return or replacement of AT49F001N-90TI?
All AT49F001N-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-90TI, 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 AT49F001N-90TI part is unused and in its original packaging.
Return procedure for AT49F001N-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001N-90TI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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M24C02-FMC6TG
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