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Microchip Technology AT49F4096A-90RI
- Part No.:
- AT49F4096A-90RI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-SOIC (0.525", 13.34mm Width)
- Datasheet:
-
AT49F4096A-90RI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 44SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,154
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Product details
Overview
AT49F4096A-90RI from Atmel is a 5V, 4-megabit (524,288 × 8-bit or 256K × 16-bit) parallel Flash memory with 90 ns read access time, sector-based architecture (8K-word boot block + two 4K-word parameter blocks + 240K-word main array), and hardware data protection. It supports byte/word programming (10 µs typical), internal erase control, and operates across –40°C to +85°C for industrial embedded firmware storage.
For engineers reviewing the AT49F4096A-90RI datasheet, AT49F4096A-90RI pinout, AT49F4096A-90RI application, or AT49F4096A-90RI equivalent, this device is selected for in-system reprogrammable boot code storage requiring single-voltage 5V operation, CMOS standby current under 100 µA, and sector-level erase isolation without high-voltage programming inputs.
Technical Context
The AT49F4096A-90RI implements a four-sector Flash architecture with dedicated boot block (00000H–01FFFH), two parameter blocks (02000H–02FFFH and 03000H–03FFFH), and main memory (04000H–3FFFFH), enabling selective erasure and secure firmware partitioning. Its command-set-driven operation uses standard CE/OE/WE controls and supports software product identification (manufacturer code 161FH, device code 1692H).
It features dual-mode I/O configuration via the BYTE pin: logic high or open enables 16-bit word mode (I/O0–I/O15 active); logic low enables 8-bit byte mode (I/O0–I/O7 active, I/O15 repurposed as A−1 LSB address input). Hardware data protection includes VCC sense (<3.8V inhibit), 10 ms power-on delay, and noise filtering on WE/CE inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8-bit or 256K × 16-bit organization) |
| Read Access Time | 90 ns - determines maximum bus clock frequency for reliable read cycles in microcontroller interfaces |
| Programming Time | 10 µs typical per byte/word - enables fast field firmware updates without external timing circuitry |
| Standby Current | 100 µA CMOS - supports low-power hold states in battery-backed or energy-sensitive systems |
| Erase Block Structure | Four independent sectors: 8K-word boot block, two 4K-word parameter blocks, one 240K-word main array - allows granular firmware revision management |
| Write Endurance | 10,000 program/erase cycles - qualifies for long-life embedded applications with periodic field updates |
| Operating Voltage | 5V ±10% - eliminates need for auxiliary voltage rails or level shifters in legacy 5V system designs |
Pinout & Package
AT49F4096A-90RI is packaged in a 44-lead, 0.525" wide plastic gull-wing SOIC (package code 44R), measuring 28.32 mm × 13.46 mm × 2.67 mm with 1.27 mm lead pitch. Pin 1 is marked by a notch or dot; package complies with JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 524,288-word addressing; A−1 function shared with I/O15 in byte mode |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read output; prevents bus contention when deasserted |
| OE | Output Enable | Active-low output gate; used with CE to control data bus drive timing and avoid conflicts during multi-device sharing |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and programming cycles |
| RESET | Reset Input | Active-low halts operations and forces outputs to high-Z; 12V override enables boot block reprogramming even when lockout is active |
| I/O0–I/O15 | Data I/O Bidirectional Bus | 16-bit data path in word mode; I/O0–I/O7 only active in byte mode; I/O15 serves as A−1 LSB address input when BYTE = 0 |
| BYTE | Bus Width Select | Logic high or open → 16-bit word mode; logic low → 8-bit byte mode with I/O15 repurposed as address LSB |
| VCC / GND | Power Supply / Ground | 5V ±10% supply with <100 µA CMOS standby draw; dual GND pins reduce ground bounce in high-speed reads |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | Hardware-enforced write protection for 8K-word boot sector (00000H–01FFFH) via command sequence; prevents accidental corruption of secure startup code |
| Data Polling & Toggle Bit | Real-time programming/erase status feedback via I/O7 complement (data polling) or I/O6 toggling - eliminates need for fixed timeout delays in host firmware |
| Sector Erase Flexibility | Independent erase of boot block, parameter blocks, or main array - enables safe firmware patching without full chip erase or data loss in protected regions |
| Single-Voltage 5V Operation | No external VPP or high-voltage programming supply required - simplifies PCB layout and reduces BOM count in industrial control and telecom systems |
| Hardware Data Protection | VCC sense, 10 ms power-on delay, noise filtering (<15 ns pulses rejected), and control-line gating prevent spurious writes during power transients or EMI events |
Applications
| Industrial PLC Firmware Storage | Telecom Base Station Boot Code |
|---|---|
Use Scenario: Storing boot loader and configuration parameters in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Non-volatile parallel Flash memory providing deterministic 90 ns read access for fast processor initialization and secure sector-locked boot code retention. Use Value: Enables field-upgradable firmware with isolated boot block protection, eliminating risk of bricking devices during remote updates while maintaining <100 µA standby draw for low-power sleep modes. |
Use Scenario: Holding bootloader and FPGA configuration bitstreams in wireless infrastructure equipment requiring high reliability and long-term data retention. IC Role / Device Role / Timing Role: 4-Mbit parallel Flash acting as primary boot source for ARM or PowerPC processors, leveraging sector erase to update parameter blocks without disturbing validated boot images. Use Value: Delivers 10,000-cycle endurance and hardware lockout to ensure carrier-grade firmware integrity across 10+ year deployments with zero tolerance for boot failure. |
| Medical Diagnostic Device Calibration Data | Automotive Engine Control Unit (ECU) Parameter Tables |
Use Scenario: Storing calibrated sensor offsets and diagnostic lookup tables in portable ultrasound or imaging systems where recalibration occurs infrequently but must survive power loss. IC Role / Device Role / Timing Role: Sector-erasable Flash memory with dedicated parameter blocks (two 4K-word sections) allowing independent update of calibration data without rewriting entire firmware image. Use Value: Guarantees data retention over 20 years at 85°C and supports byte-level writes for efficient small-data updates, reducing service downtime during recalibration procedures. |
Use Scenario: Hosting engine mapping tables (fuel, ignition, emissions) in automotive ECUs subject to frequent reflash during development and dealer-level tuning. IC Role / Device Role / Timing Role: Industrial-grade 5V Flash memory with –40°C to +85°C operation and hardware reset override (12V on RESET) enabling safe boot block reprogramming after security lock activation. Use Value: Allows certified parameter updates while preserving immutable bootloader code, meeting ISO 26262 functional safety requirements for ASIL-B systems without requiring external high-voltage circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CBTI-90G | 4 Mbit, 90 ns, 3V core (with 5V I/O tolerance); bottom-boot sector; no BYTE pin for bus-width selection | Requires 3V supply rail; lacks byte/word mode flexibility; uses different command set (AMD-style) | Select when migrating to lower-power 3V systems and existing board supports 3V VCC; verify timing compatibility with CE/OE setup/hold windows. |
| AM29LV400BB-90REI | 4 Mbit, 90 ns, 3V-only operation; top-boot configuration; no RESET pin override for boot lockout | Boot block located at highest addresses (top-boot); no 12V RESET override - boot lockout is permanent once enabled | Choose for cost-sensitive 3V designs where boot block location matches software expectations and irreversible lockout is acceptable. |
Compared with MX29LV400CBTI-90G and AM29LV400BB-90REI, the AT49F4096A-90RI uniquely supports true 5V-only operation with flexible BYTE-selectable bus width, 12V RESET override for boot block recovery, and Atmel-specific command sequences - making it optimal for legacy 5V industrial systems requiring field-serviceable boot code.
Availability
AT49F4096A-90RI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom base station boot code, and medical diagnostic device calibration data requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49F4096A-90RI 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 fabless semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs, with design centers across the US, Europe, and Asia.
The AT49F4096A product line delivers parallel-interface Flash memory optimized for industrial and telecom applications demanding robust in-system reprogrammability, sector-level data protection, and single-supply 5V operation without external high-voltage circuitry.
FAQ
What is the operating temperature range for the AT49F4096A-90RI?
The AT49F4096A-90RI is rated for industrial operation from –40°C to +85°C. This range is confirmed in the DC and AC Operating Range table (page 7 of the datasheet), where the "-90RI" suffix explicitly denotes the Industrial temperature grade with 44-lead SOIC packaging. The device maintains full specification compliance-including 90 ns read access and 100 µA standby current-across this entire range.
Does the AT49F4096A-90RI require a high-voltage programming supply?
No, the AT49F4096A-90RI operates exclusively from a single 5V ±10% supply for both read and programming functions. High-voltage programming (e.g., 12V) is only required on the RESET pin to override boot block lockout-not for standard programming. All byte/word programming and sector erases execute using internal charge pumps powered solely by VCC, eliminating external VPP circuitry.
How does the BYTE pin affect the AT49F4096A-90RI's data interface?
When the BYTE pin is high or open, the AT49F4096A-90RI operates in 16-bit word mode: I/O0–I/O15 are active bidirectional data lines. When BYTE is low, it switches to 8-bit byte mode: only I/O0–I/O7 are driven, while I/O15 becomes the A−1 LSB address input. This dual-mode capability allows seamless integration into both 8-bit and 16-bit microprocessor buses without hardware redesign.
Can the boot block of the AT49F4096A-90RI be erased after programming lockout is enabled?
Yes-but only by applying 12V ±0.5V to the RESET pin during the erase operation. With standard 5V signaling, the boot block is fully protected once lockout is enabled (verified by reading address 00002H, where I/O0 = high indicates lockout active). The 12V RESET override is a hardware feature explicitly documented for chip erase, sector erase, and word programming of the boot block, restoring full reprogrammability when needed for recovery.
What methods does the AT49F4096A-90RI provide to detect programming completion?
The AT49F4096A-90RI offers two hardware-confirmed methods: Data Polling (I/O7 returns complement of loaded data until programming completes, then true data) and Toggle Bit (I/O6 toggles between 0/1 during operation and stabilizes upon completion). Both methods are usable at any time during the cycle and eliminate reliance on fixed software timeouts, ensuring deterministic host firmware behavior across voltage and temperature variations.
AT49F4096A-90RI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-SOIC (0.525", 13.34mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8, 256K x 16
- 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:
- 44-SOIC
AT49F4096A-90RI FAQ
1.How can I place an order for AT49F4096A-90RI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F4096A-90RI 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 AT49F4096A-90RI reliable?
The price and inventory of AT49F4096A-90RI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F4096A-90RI is usually 5 days.
3.What payment methods are accepted for AT49F4096A-90RI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F4096A-90RI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F4096A-90RI?
AT49F4096A-90RI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F4096A-90RI 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 AT49F4096A-90RI?
For technical support, including AT49F4096A-90RI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F4096A-90RI requirements.
6.How does Aetrix verify that AT49F4096A-90RI is sourced from the original manufacturer or authorized distributors?
All AT49F4096A-90RI 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 AT49F4096A-90RI meets industry standards.
7.What is the process for return or replacement of AT49F4096A-90RI?
All AT49F4096A-90RI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F4096A-90RI, 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 AT49F4096A-90RI part is unused and in its original packaging.
Return procedure for AT49F4096A-90RI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F4096A-90RI Tags
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