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Microchip Technology AT49F001-90TI
- Part No.:
- AT49F001-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001-90TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
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Product details
Overview
AT49F001-90TI from Microchip Technology (formerly Atmel) is a 5V-only, 1 Mbit (128K × 8) in-system reprogrammable Flash memory IC with 90 ns read access time, sector-based architecture (16K boot block + two 8K parameter blocks + two main memory blocks), and hardware data protection. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F001-90TI datasheet, AT49F001-90TI pinout, AT49F001-90TI application, or AT49F001-90TI equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), 50 mA active current, 300 µA CMOS standby current, boot block programming lockout, and TSOP-32 package compatibility with space-constrained PCB layouts.
Technical Context
The AT49F001-90TI implements a command-driven architecture using standard CE/OE/WE control lines and 6-byte software command sequences for chip erase, sector erase, byte programming, and boot block lockout. Its internal program control logic eliminates need for external high-voltage programming circuitry.
Memory organization is partitioned into five distinct sectors: one 16K-byte boot block (address 1C000H–1FFFFH), two 8K-byte parameter blocks (1A000H–1BFFFH and 18000H–19FFFH), and two main memory blocks (10000H–17FFFH and 00000H–0FFFFH), enabling selective erasure and firmware modularization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), providing sufficient space for bootloader + application code in 8-bit microcontroller systems |
| Read Access Time | 90 ns - enables direct execution from flash (XIP) in timing-critical embedded applications |
| Operating Voltage | 5 V ±10% - compatible with legacy 5V logic families and eliminates need for level shifters |
| Erase Cycle Time | 10 seconds per chip or sector - supports rapid firmware updates during manufacturing or field service |
| Byte Programming Time | 10 µs typical (50 µs max) - allows fine-grained patching without full reflash overhead |
| End-of-Program Detection | DATA polling (I/O7 complement) and toggle bit (I/O6 toggling) - enables deterministic host software flow control |
| Write Endurance | 10,000 program/erase cycles - validated for long-term use in industrial control and telecom equipment |
| Temperature Range | −40°C to +85°C - qualified for industrial-grade operation without derating |
Pinout & Package
AT49F001-90TI is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 mm × 20 mm, JEDEC MO-142 BD), pin-compatible with other AT49F001 variants in TSOP-32 format. Pin 9 is NC (no connect) per datasheet Rev. 1008D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 131,072-word addressing; A16 selects upper/lower half of memory map |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write operations; supports byte-level granularity for firmware patching |
| CE | Chip Enable | Active-low chip select; when high, places outputs in high-impedance state to prevent bus contention |
| OE | Output Enable | Active-low output gate; used with CE to implement dual-line read control for flexible bus arbitration |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing |
| RESET | Reset Input | Active-low reset; halts ongoing program/erase and forces high-Z outputs; 12V override enables boot block reprogramming |
| VCC | Power Supply | +5V supply input; internal voltage sensing disables programming if VCC drops below 3.8V |
| GND | Ground | Reference return path for all signals and power; decoupling required within 10 mm of VCC pin |
| NC (Pin 9) | No Connect | Unbonded pin; must remain unconnected on PCB to avoid functional interference |
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 integrity against accidental overwrite |
| Hardware Data Protection | VCC sense (<3.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low / CE high / WE high blocks writes) |
| 5V-Only Reprogrammability | Eliminates need for 12V programming supplies or external charge pumps - simplifies system power design and reduces BOM cost |
| Industrial Temperature Support | Rated for −40°C to +85°C operation with 300 µA max CMOS standby current - suitable for outdoor, factory-floor, and automotive under-hood environments |
| DATA Polling & Toggle Bit | Dual end-of-program detection methods allow host MCU to poll I/O7 (complement mode) or monitor I/O6 (toggle) without fixed timeout delays |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Bootloader |
|---|---|
|
Use Scenario: Storing firmware and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding ladder logic interpreter and I/O mapping tables; accessed via 8-bit parallel bus at ≤11 MHz system clock. Use Value: Sector erase capability allows independent update of control logic (main memory) while preserving calibration data (parameter blocks) and secure startup code (boot block). |
Use Scenario: Hosting boot code for 8051- or Z80-based medical instruments where firmware must survive power loss and support field upgrades. IC Role / Device Role / Timing Role: Primary boot device mapped to CPU reset vector; provides first instructions executed after power-on or reset. Use Value: Boot block lockout prevents corruption of critical initialization routines during routine application updates, ensuring reliable system recovery. |
| Telecom Line Card Configuration | Point-of-Sale Terminal Data Logging |
|
Use Scenario: Storing line provisioning profiles, DSP coefficients, and fault logs in DSLAM or PBX line cards operating in telecom central offices. IC Role / Device Role / Timing Role: Parameter storage device interfaced to microcontroller via shared address/data bus; erased/reprogrammed during remote firmware push. Use Value: Two independent 8K parameter blocks enable A/B versioning - one block active while the other is updated, minimizing service interruption. |
Use Scenario: Recording transaction history, tax tables, and firmware patches in retail POS terminals subject to frequent regulatory updates. IC Role / Device Role / Timing Role: Field-upgradable nonvolatile memory co-located with application MCU; programmed via serial-to-parallel bridge during maintenance mode. Use Value: 10,000 write cycles and 90 ns read speed support daily logging plus quarterly firmware revisions over 5+ year product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F002-90TI | 2 Mbit (256K × 8) density; identical 90 ns access, TSOP-32 package, and command set | Supports larger firmware images; requires no PCB change but needs address line A17 routed | Select when future firmware growth exceeds 1 Mbit; retains same timing, power, and lockout behavior |
| SST39VF010-90-3C-NHE | 1 Mbit, 90 ns, 3.3V core (with 5V I/O tolerance); different command set and no boot block lockout | Lower active power (20 mA vs. 50 mA); incompatible lockout and reset override features | Choose for 3.3V systems prioritizing power efficiency; not drop-in due to voltage and security feature mismatch |
Compared with AT49F002-90TI, the AT49F001-90TI offers proven density for compact bootloaders; versus SST39VF010-90-3C-NHE, it delivers industrial-grade 5V operation and hardware-enforced boot code protection essential for mission-critical firmware.
Availability
AT49F001-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system bootloading, telecom line card configuration, and point-of-sale terminal data logging requiring stable component supply across extended product lifecycles.
Supply support for AT49F001-90TI 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 AT49F family of parallel Flash memories, emphasizing reliability and long-term availability for industrial and automotive applications.
The AT49F001 product line was designed specifically for 5V embedded systems needing in-system reprogrammability without high-voltage programming infrastructure, targeting bootloader, firmware, and configuration storage roles.
FAQ
What is the memory organization of the AT49F001-90TI?
The AT49F001-90TI organizes its 1 Mbit (131,072 × 8) array into five sectors: a 16K-byte boot block (1C000H–1FFFFH), two 8K-byte parameter blocks (1A000H–1BFFFH and 18000H–19FFFH), and two main memory blocks (10000H–17FFFH and 00000H–0FFFFH). This structure enables selective erasure and firmware modularity, and is explicitly defined for the AT49F001(N)T variant in datasheet Rev. 1008D.
Does the AT49F001-90TI support boot block programming lockout?
Yes, the AT49F001-90TI supports boot block programming lockout via a six-cycle command sequence (5555H/AA, 2AAAH/55, 5555H/80, 5555H/AA, 2AAAH/55, 5555H/40). Once enabled, the 16K-byte boot block (1C000H–1FFFFH) cannot be erased or programmed at ≤5.5V. The RESET pin at 12V ±0.5V overrides this lockout, a feature confirmed for AT49F001(N)T in the datasheet.
What package type is used for the AT49F001-90TI?
The AT49F001-90TI uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 mm × 20 mm, JEDEC MO-142 BD). Pin 9 is designated NC (no connect), consistent with the AT49F001(N)(T) family specification. This package is surface-mount compatible and optimized for high-density PCB layouts.
How does the AT49F001-90TI indicate completion of a byte programming cycle?
The AT49F001-90TI provides two hardware-supported methods: DATA polling (reading the programmed byte returns complemented data on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming and stops upon completion). Both are characterized timing parameters, not 100% tested, and allow host software to avoid fixed timeouts.
What is the maximum erase cycle time for the AT49F001-90TI?
The maximum erase cycle time for the AT49F001-90TI is 10 seconds for both chip erase and sector erase operations. This value is specified in the "Program Cycle Characteristics" table (tEC = 10 seconds) and applies across the full industrial temperature range (−40°C to +85°C), with no derating required.
AT49F001-90TI 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
AT49F001-90TI FAQ
1.How can I place an order for AT49F001-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001-90TI 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 AT49F001-90TI reliable?
The price and inventory of AT49F001-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001-90TI is usually 5 days.
3.What payment methods are accepted for AT49F001-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001-90TI?
AT49F001-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001-90TI 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 AT49F001-90TI?
For technical support, including AT49F001-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001-90TI requirements.
6.How does Aetrix verify that AT49F001-90TI is sourced from the original manufacturer or authorized distributors?
All AT49F001-90TI 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 AT49F001-90TI meets industry standards.
7.What is the process for return or replacement of AT49F001-90TI?
All AT49F001-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001-90TI, 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 AT49F001-90TI part is unused and in its original packaging.
Return procedure for AT49F001-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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