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Microchip Technology AT49F001N-90TC
- Part No.:
- AT49F001N-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F001N-90TC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,808
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Product details
Overview
AT49F001N-90TC 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 controllers and boot firmware applications. It features 55 ns read access time, 10 µs typical byte programming, 10-second chip erase, hardware data protection, and sector architecture with 16KB boot block, two 8KB parameter blocks, and two main memory blocks (32KB + 64KB).
For engineers reviewing the AT49F001N-90TC datasheet, AT49F001N-90TC pinout, AT49F001N-90TC application, or AT49F001N-90TC equivalent, key selection criteria include 5V-only operation, TSOP-32 package compatibility, boot block lockout capability, DATA polling/Toggle Bit status detection, and industrial temperature range support (-40°C to +85°C) per the -90TC suffix.
Technical Context
The AT49F001N-90TC implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read timing and command-based programming/erasure. Its internal program controller handles byte programming and sector/chip erase without external high-voltage circuitry.
It uses a sector-organized memory map: boot block (1C000H–1FFFFH), two parameter blocks (1A000H–1BFFFH and 18000H–19FFFH), and two main memory blocks (10000H–17FFFH and 00000H–0FFFFH). Boot block lockout is enabled via six-byte command sequence and enforced by on-chip logic.
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 | 90 ns max - ensures compatibility with 11 MHz bus timing in legacy embedded systems. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of configuration parameters or calibration data. |
| Chip Erase Time | 10 seconds - allows predictable firmware recovery during manufacturing or service. |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware. |
| Boot Block Protection | 16 KB (1C000H–1FFFFH) with lockout enable/disable via command sequence - secures bootloader code against accidental overwrite. |
| Operating Voltage | 5.0 V ±10% - simplifies power design; no auxiliary voltage rails required. |
| Temperature Range | -40°C to +85°C (industrial grade) - validated for use in automotive body control modules and industrial HMIs. |
Pinout & Package
AT49F001N-90TC is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP, Type I, 8 mm × 20 mm), JEDEC MO-142 compliant. Pin 1 is marked by a beveled corner; 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 128K-word addressing; A16 selects upper/lower memory banks. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; latched on rising edge of WE/CE during programming; tri-stated when CE or OE high. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; inhibits programming if held high. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention; high disables outputs to high-impedance state. |
| WE | Write Enable | Active-low write strobe; controls latching of addresses and data during programming/erase command cycles. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; not used for boot override (unavailable on N(T) variant). |
| VCC | Power Supply | +5.0 V supply; must be stable ≥3.8 V for programming to be enabled (VCC sense protection). |
| GND | Ground | Reference return path for all signals and power; decoupling capacitor required near VCC pin. |
| NC | No Connect | Pin 9 - must be left unconnected; floating or driven externally may cause undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent erasability of 16KB boot block, two 8KB parameter blocks, and two main memory blocks (32KB/64KB) enables modular firmware updates without full chip erase. |
| 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 reprogramming. |
| Boot Block Lockout | One-time programmable lockout of 16KB boot sector (1C000H–1FFFFH); once enabled, prevents erasure/programming at ≤5.5 V - ensures bootloader integrity. |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 (complement → true data) and I/O6 (toggling → active operation) eliminates polling delays and simplifies host driver implementation. |
| Low Power Standby | 100 µA CMOS standby current (industrial temp) - suitable for battery-backed systems requiring extended retention with minimal quiescent draw. |
| 10,000 Write/Erase Cycles | Endurance rating verified across full temperature range - supports field-upgradable devices deployed for >5 years in industrial environments. |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing and updating firmware for programmable logic controllers in factory automation systems where field upgrades occur quarterly. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides 90 ns read access for real-time scan cycle execution. Use Value: Sector erase allows parameter block updates without disturbing bootloader (16KB lockout), reducing downtime during commissioning and maintenance. |
Use Scenario: Holding calibrated sensor tables and diagnostic routines in vehicle BCMs subject to ECU reflashing via CAN. IC Role / Device Role / Timing Role: Boot-critical Flash memory; stores secure bootloader that validates signed application images before execution. Use Value: Boot block lockout prevents corruption of bootloader during over-the-air updates, meeting ISO 26262 ASIL-B functional safety requirements. |
| Medical Device Configuration Memory | Networking Equipment Bootloader |
Use Scenario: Retaining user-configurable settings (e.g., alarm thresholds, display brightness) across power cycles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage with byte-level write capability; leverages 10 µs/byte programming for rapid setting saves. Use Value: Two independent 8KB parameter blocks allow A/B configuration storage for rollback-safe updates and audit logging. |
Use Scenario: Hosting primary bootloader in enterprise switches/routers that load OS images from external media after power-on self-test. IC Role / Device Role / Timing Role: First-stage boot memory mapped at reset vector; accessed within 90 ns to minimize boot latency. Use Value: 10,000-cycle endurance and industrial temperature rating ensure reliable operation over 10+ year product lifecycles in telecom infrastructure. |
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 | 3.3 V core (5 V tolerant I/O), 90 ns access, same 1 Mbit density and TSOP-32 package; lacks boot block lockout and RESET pin functionality. | Requires level-shifting in 5 V systems; no hardware-protected boot region - relies on software locks only. | Choose for lower-power 3.3 V designs where boot security is managed in firmware; not drop-in compatible due to voltage and feature mismatch. |
| MX29LV160ETTI-90G | 3.0 V operation, 90 ns access, 16 Mbit density (16× larger), same TSOP-48 footprint (not pin-compatible); includes CFI query and enhanced boot block (top/bottom configurable). | Higher density supports complex bootloaders; CFI enables auto-detection in BIOS/UEFI; incompatible pin count and voltage. | Choose for next-generation designs migrating to 3 V and requiring scalable Flash; requires PCB redesign and firmware adaptation. |
Compared with SST39VF010-90-4C-NHE and MX29LV160ETTI-90G, the AT49F001N-90TC delivers guaranteed 5 V-only operation, hardware-enforced boot block lockout, and proven industrial reliability in legacy 5 V embedded platforms - making it the optimal choice where voltage compatibility and bootloader integrity are non-negotiable.
Availability
AT49F001N-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, medical device configuration memory, and networking equipment bootloaders requiring stable component supply across long production lifecycles.
Supply support for AT49F001N-90TC 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 legacy AT49F series Flash memories, ensuring long-term availability and technical documentation continuity.
The AT49F001N-90TC belongs to Atmel's 5V Flash memory product line, designed specifically for cost-sensitive, industrial-grade embedded systems requiring robust in-system reprogrammability without high-voltage programming circuitry.
FAQ
What is the function of the RESET pin on the AT49F001N-90TC?
The RESET pin on the AT49F001N-90TC is an active-low input that halts ongoing operations and places all outputs in high-impedance state. Unlike the AT49F001T variant, the AT49F001N-90TC does not support 12 V RESET override for boot block reprogramming. The pin is functional for system reset coordination but not for unlocking protected sectors.
Does the AT49F001N-90TC support both chip erase and sector erase operations?
Yes, the AT49F001N-90TC supports both chip erase (10 seconds, erases all blocks except locked boot block) and sector erase (same duration, targets specific 8KB parameter or 32KB/64KB main memory blocks). Sector erase uses a six-bus-cycle command with sector address latched on the sixth WE falling edge.
How is boot block lockout enabled and verified on the AT49F001N-90TC?
Boot block lockout is enabled via a six-byte command sequence (5555h/AAh, 2AAAh/55h, 5555h/80h, 5555h/AAh, 2AAAh/55h, 5555h/40h). Verification is performed in Software Product Identification mode: reading address 1C002h returns I/O0 = high if lockout is active, low if inactive - confirming protection status before field deployment.
What are the voltage and timing requirements for reliable programming of the AT49F001N-90TC?
Reliable programming of the AT49F001N-90TC requires VCC = 5.0 V ±10%, with VCC ≥3.8 V (per VCC sense circuit). Valid write pulse width (tWP) is ≥90 ns, address/data setup/hold times meet AC Byte Load specs (e.g., tDS = 50 ns), and OE must remain high during WE-controlled programming cycles to avoid bus contention.
Can the AT49F001N-90TC be used in place of the AT49F001-90TC?
No - the AT49F001N-90TC and AT49F001-90TC differ in boot block location and RESET functionality. The "N" suffix denotes the newer revision with boot block at 1C000H–1FFFFH and no RESET override capability, while the base AT49F001-90TC has boot block at 00000H–03FFFH and supports 12 V RESET unlock. They are not functionally interchangeable without firmware and address map changes.
AT49F001N-90TC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49F001N-90TC FAQ
1.How can I place an order for AT49F001N-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-90TC 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-90TC reliable?
The price and inventory of AT49F001N-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-90TC is usually 5 days.
3.What payment methods are accepted for AT49F001N-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-90TC?
AT49F001N-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-90TC 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-90TC?
For technical support, including AT49F001N-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-90TC requirements.
6.How does Aetrix verify that AT49F001N-90TC is sourced from the original manufacturer or authorized distributors?
All AT49F001N-90TC 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-90TC meets industry standards.
7.What is the process for return or replacement of AT49F001N-90TC?
All AT49F001N-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-90TC, 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-90TC part is unused and in its original packaging.
Return procedure for AT49F001N-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F001N-90TC Tags
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