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Microchip Technology AT49F4096A-90RC
- Part No.:
- AT49F4096A-90RC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-SOIC (0.525", 13.34mm Width)
- Datasheet:
-
AT49F4096A-90RC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 44SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,849
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Product details
Overview
AT49F4096A-90RC from Atmel is a 5V-only, 4-megabit (512K × 8 / 256K × 16) parallel Flash memory IC with 90 ns read access time, sector-based erase architecture (boot + parameter + main blocks), and hardware data protection. It operates in byte or word mode via the BYTE pin and supports in-system reprogramming without high-voltage programming inputs.
For engineers reviewing the AT49F4096A-90RC datasheet, AT49F4096A-90RC pinout, AT49F4096A-90RC application, or AT49F4096A-90RC equivalent, key selection criteria include its bottom-boot block protection, 10 µs typical byte/word programming time, 10-second sector erase, CMOS standby current of 100 µA, and compatibility with standard microprocessor bus timing.
Technical Context
The AT49F4096A-90RC implements a four-sector Flash architecture: one 8K-word boot block (00000H–01FFFH), two 4K-word parameter blocks, and one 240K-word main memory array. Erase and program operations are internally controlled via command sequences written to specific address/data latches using CE/WE/OE timing.
It supports dual-bus-mode operation-byte mode (I/O0–I/O7 active, I/O15 used as A−1) when BYTE = 0, and word mode (I/O0–I/O15 active) when BYTE = 1 or floating. Data Polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide real-time program/erase status detection without polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8 or 256K × 16 organization) |
| Read Access Time | 90 ns - determines maximum sustained read throughput on 5 MHz bus |
| Programming Time | 10 µs typical per byte/word - enables fast field updates without external timing logic |
| Sector Erase Time | 10 seconds - allows selective firmware patching without full chip erase |
| Standby Current | 100 µA CMOS - supports low-power hold states in battery-backed systems |
| Endurance | 10,000 write/erase cycles - qualifies for embedded firmware storage with moderate update frequency |
| Operating Voltage | 5V ±10% - eliminates need for dedicated programming voltage rails |
Pinout & Package
AT49F4096A-90RC is available in 44-lead SOIC (44R) package per JEDEC MS-012, 0.525" wide, gull-wing lead form. Pin count and layout match industry-standard 44-pin Flash memory footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 512K-byte addressing space |
| CE | Chip Enable | Active-low chip select; must be low for read/write; enables bus contention control |
| OE | Output Enable | Active-low output gate; used with CE to tri-state outputs during bus sharing |
| WE | Write Enable | Active-low write strobe; latches addresses and data during command sequences |
| RESET | Reset Input | Halts operations and forces high-Z outputs; 12V override enables boot block reprogramming |
| BYTE | Bus Width Select | Logic 0 = byte mode (I/O0–I/O7); logic 1/floating = word mode (I/O0–I/O15) |
| I/O0–I/O15 | Data I/O | Bidirectional data bus; I/O15 serves as LSB address (A−1) in byte mode |
| VCC / GND | Power Supply | 5V supply and ground pins; decoupling required per high-speed Flash layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector protection | 8K-word (00000H–01FFFH) lockout prevents accidental overwrite of secure boot code |
| Hardware data protection | VCC sense (<3.8V inhibits programming), 10 ms power-on delay, and noise filtering (<15 ns pulses ignored) |
| Embedded command execution | No external controller needed-sector erase, chip erase, and programming execute autonomously after command latch |
| Data Polling & Toggle Bit | Real-time status feedback via I/O7 (complement) or I/O6 (toggle) eliminates fixed-timing delays |
| Flexible bus interface | Single 5V supply, standard CE/OE/WE control, and BYTE-selectable byte/word mode simplify integration |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot Code |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Non-volatile program memory providing reliable boot code and field-upgradable application binaries. Use Value: Sector erase enables partial firmware updates without disrupting operational logic; 10,000-cycle endurance supports multi-year field service intervals. |
Use Scenario: Hosting boot ROM and BIOS extensions in legacy x86 or 8051-based industrial controllers with parallel bus interfaces. IC Role / Device Role / Timing Role: Drop-in EPROM replacement delivering faster 90 ns reads and in-system reprogrammability. Use Value: Eliminates need for UV erasers or socketed EPROM programmers; boot block lockout preserves critical startup routines during field updates. |
| Communications Equipment Parameter Tables | Medical Device Calibration Data |
Use Scenario: Storing channel calibration tables, protocol stacks, and configuration profiles in baseband processors of cellular infrastructure equipment. IC Role / Device Role / Timing Role: Parameter memory block (two 4K-word sections) holding infrequently modified but mission-critical settings. Use Value: Independent sector erase allows safe parameter updates without disturbing main firmware; hardware lockout prevents corruption during power transients. |
Use Scenario: Retaining device-specific calibration coefficients and safety-critical diagnostic flags in FDA-regulated medical instrumentation. IC Role / Device Role / Timing Role: Secure non-volatile storage with verified write integrity and tamper-resistant boot block for regulatory traceability. Use Value: RESET-pin 12V override enables authorized recalibration while maintaining default lockout; 100 µA standby current extends battery backup duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV400BB-90EC | 4 Mbit, 90 ns, 3V core (3.3V I/O), top-boot architecture | Requires level-shifting for 5V systems; boot block at highest addresses | Select if migrating to lower-voltage design or requiring top-boot layout compatibility |
| SST39VF400A-90-4C-NHE | 4 Mbit, 90 ns, 3.3V-only, no 5V operation support | Not pin-compatible; different command set and sector map | Choose only for new 3.3V designs where 5V tolerance is unnecessary |
Compared with AM29LV400BB-90EC and SST39VF400A-90-4C-NHE, the AT49F4096A-90RC offers native 5V operation, bottom-boot alignment matching legacy EPROM layouts, and guaranteed 10,000-cycle endurance-making it optimal for retrofitting 5V industrial systems requiring field-upgradable firmware with secure boot integrity.
Availability
AT49F4096A-90RC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot code, communications equipment parameter tables, and medical device calibration data requiring stable component supply across extended product lifecycles.
Supply support for AT49F4096A-90RC 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 for industrial and embedded markets.
The AT49F4096A-90RC belongs to Atmel's parallel Flash memory product line, designed specifically for drop-in EPROM replacement in 5V systems requiring in-system reprogrammability, sector-level erase granularity, and hardware-based data protection.
FAQ
What is the operating temperature range for the AT49F4096A-90RC?
The AT49F4096A-90RC is rated for commercial operation from 0°C to +70°C. Its ordering code suffix "RC" explicitly denotes the 44-lead SOIC package in the commercial temperature grade. This makes the AT49F4096A-90RC suitable for office, lab, and non-extreme industrial environments where ambient thermal stress remains within this band.
Does the AT49F4096A-90RC support both byte and word data access modes?
Yes, the AT49F4096A-90RC supports configurable bus width via the BYTE pin: logic 0 selects byte mode (I/O0–I/O7 active, I/O15 functions as A−1), while logic 1 or open circuit selects word mode (I/O0–I/O15 active). This dual-mode capability allows the AT49F4096A-90RC to interface seamlessly with either 8-bit or 16-bit microprocessor buses without external glue logic.
How does boot block protection work on the AT49F4096A-90RC?
The AT49F4096A-90RC implements boot block lockout via a six-cycle command sequence that permanently disables programming and erasure of the 8K-word boot sector (00000H–01FFFH) under standard 5V conditions. Once enabled, the AT49F4096A-90RC requires 12V applied to RESET to override protection-ensuring secure, tamper-resistant storage of critical boot code.
What erase methods does the AT49F4096A-90RC support?
The AT49F4096A-90RC supports both chip-erase (entire memory, excluding locked boot block) and sector-erase (individual 8K/4K/240K-word blocks) using standardized six-cycle command sequences. Sector erase completes in ≤10 seconds and enables targeted firmware updates; chip erase uses the same timing but affects all unlocked sectors simultaneously.
Is the AT49F4096A-90RC pin-compatible with standard EPROMs like the 27C400?
The AT49F4096A-90RC shares the same 44-pin SOIC footprint and core signal mapping (A0–A17, CE, OE, WE, I/O0–I/O7) as the 27C400, enabling direct PCB replacement. However, the AT49F4096A-90RC adds RESET and BYTE pins not present on EPROMs-these must be tied to VCC or handled in system firmware to maintain compatibility during read operations.
AT49F4096A-90RC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOIC
AT49F4096A-90RC FAQ
1.How can I place an order for AT49F4096A-90RC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F4096A-90RC 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-90RC reliable?
The price and inventory of AT49F4096A-90RC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F4096A-90RC is usually 5 days.
3.What payment methods are accepted for AT49F4096A-90RC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F4096A-90RC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F4096A-90RC?
AT49F4096A-90RC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F4096A-90RC 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-90RC?
For technical support, including AT49F4096A-90RC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F4096A-90RC requirements.
6.How does Aetrix verify that AT49F4096A-90RC is sourced from the original manufacturer or authorized distributors?
All AT49F4096A-90RC 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-90RC meets industry standards.
7.What is the process for return or replacement of AT49F4096A-90RC?
All AT49F4096A-90RC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F4096A-90RC, 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-90RC part is unused and in its original packaging.
Return procedure for AT49F4096A-90RC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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