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Microchip Technology AT49F001N-90VC
- Part No.:
- AT49F001N-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F001N-90VC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
AT49F001N-90VC 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 AT49F001N-90VC datasheet, AT49F001N-90VC pinout, AT49F001N-90VC application, or AT49F001N-90VC equivalent, key selection considerations include its 5V-only operation, boot block programming lockout capability, 10 µs/byte typical programming time, 10-second erase cycle, and VSOP-32 (8 × 14 mm) package compatibility with space-constrained industrial control and legacy system upgrades.
Technical Context
The AT49F001N-90VC implements a command-register-based architecture for byte programming, sector erasure, and chip erasure using standard 5V logic levels-no high-voltage programming supply required. Its internal timing logic manages erase and program cycles autonomously after command sequence execution.
It supports dual-line control (CE/OE) for bus contention avoidance during read operations and features DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) for end-of-operation detection. The RESET pin enables system-level reset but does not support boot block override on the N variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - provides sufficient code storage for 8-bit/16-bit MCU bootloaders and configuration data. |
| Read Access Time | 90 ns max - ensures compatibility with 10 MHz–12 MHz microprocessor buses without wait states. |
| Byte Programming Time | 10 µs typical - enables fast incremental firmware updates without system downtime. |
| Erase Cycle Time | 10 seconds max (full chip or sector) - balances speed and reliability for field reprogramming in industrial environments. |
| End-of-Operation Detection | DATA polling (I/O7) and Toggle Bit (I/O6) - eliminates need for fixed timing delays in host firmware. |
| Write Endurance | 10,000 program/erase cycles - supports long-term field maintenance of embedded devices over 5+ years. |
| Power Dissipation | 275 mW active (50 mA @ 5V), 100 µA CMOS standby - suitable for low-power and thermally constrained applications. |
Pinout & Package
AT49F001N-90VC is packaged in a 32-lead Plastic Thin Small Outline Package (VSOP), 8 mm × 14 mm body, JEDEC-compliant, with gull-wing leads and pin 1 identifier marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 directly map to memory locations 0x00000–0x1FFFF. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; supports byte-wide reads, writes, and command loading per JEDEC-standard Flash protocols. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables multi-device bus sharing. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, preventing bus contention during shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence timing; inhibits programming if held high. |
| RESET | Reset Input | Active-low system reset; halts ongoing program/erase and forces high-Z outputs; no boot block override capability on AT49F001N variant. |
| VCC | Power Supply | +5.0 V ±10% supply; powers core logic and memory array; VCC sense circuitry disables programming if voltage drops below 3.8 V. |
| GND | Ground | Reference ground for all signals and power; requires low-impedance connection to minimize noise-induced command errors. |
| NC | No Connect | Pin 9 in VSOP package is unconnected; must remain floating - no external tie required or permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16K-byte boot block (0x00000–0x03FFF) supports permanent firmware protection via software command; prevents accidental overwrite of bootloader code. |
| 5V-Only In-System Reprogrammability | Eliminates need for 12V programming supplies or socketed programmers - enables field firmware updates via standard microcontroller GPIOs. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibition (OE low/CE high/WE high) prevent spurious writes during power transients or EMI events. |
| Standard EPROM-Compatible Read Interface | Uses CE/OE/WE control signals identical to EPROMs - allows drop-in replacement in legacy designs without bus interface redesign. |
| Two Erase Methods | Full-chip erase (6-byte command) and sector erase (6-cycle command) provide flexibility: chip erase clears all except locked boot block; sector erase targets specific 8K/32K/64K regions. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Upgrade |
|---|---|
|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage with 90 ns read access enabling real-time scan cycle execution; boot block lockout preserves certified safety firmware. Use Value: Enables secure, field-upgradable firmware without hardware modification or system shutdown - critical for minimizing production line downtime. |
Use Scenario: Replacing obsolete EPROMs (e.g., 27C010) in aging medical instrumentation or telecom infrastructure where PCB layout cannot be changed. IC Role / Device Role / Timing Role: Pin-compatible Flash memory with identical DIP/VSOP footprints and EPROM-style read protocol; supports same address/data bus timing. Use Value: Extends product lifecycle by enabling firmware patches and regulatory compliance updates without board redesign or requalification. |
| Bootloader Memory for 8-bit MCUs | Parameter Storage in Test Equipment |
|
Use Scenario: Hosting secure bootloader code that validates and loads application firmware from external media in resource-constrained microcontrollers (e.g., ATmega, PIC16). IC Role / Device Role / Timing Role: Dedicated boot memory region (0x00000–0x03FFF) with hardware-enforced write lock; accessed at power-on reset before main application runs. Use Value: Ensures bootloader integrity against corruption or malicious overwrite - foundational for secure boot and firmware authentication chains. |
Use Scenario: Storing calibration coefficients, sensor compensation tables, and user-defined test profiles in automated test equipment requiring persistent, field-modifiable settings. IC Role / Device Role / Timing Role: Two independent 8K parameter blocks allow atomic update of calibration data while preserving operational firmware in main memory. Use Value: Supports zero-downtime calibration updates and customer-specific configuration without replacing hardware or re-flashing entire memory image. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F001N-90TC | Identical electrical specs and command set; differs only in TSOP-32 (8 × 20 mm) package vs. VSOP-32 (8 × 14 mm). | Requires PCB footprint change; TSOP offers better thermal dissipation but larger board area. | Select AT49F001N-90TC if board layout accommodates 20 mm length and thermal management is prioritized over compactness. |
| AT49F001-90VC | Lacks boot block lockout feature; boot sector (0x00000–0x03FFF) remains fully reprogrammable under all conditions. | Not suitable for safety-critical bootloader storage where permanent write protection is mandated. | Choose AT49F001-90VC only for applications requiring full memory flexibility and no secure boot requirements. |
Compared with AT49F001N-90TC and AT49F001-90VC, the AT49F001N-90VC uniquely delivers boot block write protection in the smallest VSOP footprint - making it optimal for space-constrained, safety-aware embedded upgrades where physical size and firmware integrity are both critical.
Availability
AT49F001N-90VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system upgrades, and bootloader memory applications requiring stable component supply across extended product lifecycles.
Supply support for AT49F001N-90VC 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, application notes, and long-term manufacturing commitment for industrial-grade Flash memory.
The AT49F001 series was designed specifically for 5V embedded systems needing reliable, in-system reprogrammable nonvolatile storage - targeting industrial control, medical devices, and telecommunications infrastructure where legacy compatibility and firmware security are essential.
FAQ
What is the boot block address range for AT49F001N-90VC?
The boot block for AT49F001N-90VC occupies addresses 0x00000 to 0x03FFF (16 Kbytes). This region supports the programming lockout feature, which - once enabled - permanently prevents erasure or reprogramming of data stored within this range using standard 5V commands.
Does AT49F001N-90VC support 12V RESET-based boot block override?
No. The AT49F001N-90VC does not support 12V override of the boot block lockout feature. That capability is explicitly reserved for the AT49F001T variant. On AT49F001N-90VC, once boot block lockout is enabled, the protected region remains immutable under all 5V operating conditions.
What package type is used by AT49F001N-90VC?
AT49F001N-90VC uses a 32-lead Plastic Thin Small Outline Package (VSOP) with dimensions 8 mm × 14 mm. It conforms to JEDEC MO-142 standards and features gull-wing leads, pin 1 identifier, and a no-connect (NC) pin at position 9.
How is end-of-program detection implemented in AT49F001N-90VC?
AT49F001N-90VC supports two hardware methods: DATA polling (reading the programmed byte returns its complement on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during operation and stabilizes upon completion). Both methods eliminate reliance on fixed timing delays in host firmware.
Can AT49F001N-90VC be used as a direct replacement for EPROMs like 27C010?
Yes - AT49F001N-90VC provides EPROM-compatible read operation (CE/OE/WE control, same pinout in VSOP/DIP variants) and matches the 1 Mbit density of 27C010. However, it requires minor firmware changes to implement command sequences for programming/erasure, unlike one-time-programmable EPROMs.
AT49F001N-90VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm 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-VSOP
AT49F001N-90VC FAQ
1.How can I place an order for AT49F001N-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F001N-90VC 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-90VC reliable?
The price and inventory of AT49F001N-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F001N-90VC is usually 5 days.
3.What payment methods are accepted for AT49F001N-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F001N-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F001N-90VC?
AT49F001N-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F001N-90VC 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-90VC?
For technical support, including AT49F001N-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F001N-90VC requirements.
6.How does Aetrix verify that AT49F001N-90VC is sourced from the original manufacturer or authorized distributors?
All AT49F001N-90VC 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-90VC meets industry standards.
7.What is the process for return or replacement of AT49F001N-90VC?
All AT49F001N-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F001N-90VC, 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-90VC part is unused and in its original packaging.
Return procedure for AT49F001N-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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