My Inquiry
My Account
Microchip Technology AT49LW080-33JX
- Part No.:
- AT49LW080-33JX
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LW080-33JX.pdf
- Description:
- IC FLASH 8MBIT PAR 33MHZ 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,924
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49LW080-33JX from Microchip Technology is a 8-Mbit Firmware Hub (FWH) Flash memory IC designed for BIOS/firmware storage in Intel 8xx/E7xx/E8xx chipset platforms. It delivers uniform 64-Kbyte sectors, supports dual interfaces (FWH and A/A Mux), operates at 33 MHz with 3.3V I/O, and integrates hardware write-protection via TBL and WP pins for secure platform boot code storage.
For engineers reviewing the AT49LW080-33JX datasheet, AT49LW080-33JX pinout, AT49LW080-33JX application, or AT49LW080-33JX equivalent, key selection criteria include FWH interface compliance with Intel ICH, sector-level hardware/software lock control, 33 MHz synchronous operation, VPP flexibility (3.3V/12V), and PLCC/TSOP package compatibility in legacy PC motherboard designs.
Technical Context
The AT49LW080-33JX implements a dual-mode interface architecture: Firmware Hub (FWH) for in-system runtime access and Address/Address Multiplexed (A/A Mux) for manufacturing programming. Its Command User Interface (CUI) arbitrates between these modes and initiates automated byte-program and sector-erase operations.
FWH mode uses a 5-signal PCI-compliant interface (FWH[4:0], CLK, RST/INIT) with 28-bit address decoding and single-byte transfers; A/A Mux mode employs 11-pin multiplexed addressing (A[10:0]) and 8-bit data (I/O[7:0]), with R/C pin controlling row/column latching and RY/BY indicating readiness during erase/program cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbits (1 Mbyte) organized as sixteen 64-Kbyte uniform sectors - enables granular firmware updates without full chip erase. |
| Interface Modes | Firmware Hub (FWH): 5-signal, 33 MHz synchronous, PCI-compliant; A/A Mux: 11+8-pin multiplexed address/data - separates runtime security from factory programming. |
| Supply Voltages | VCC = 3.3 V ± 0.3 V; VPP = 3.3 V or 12 V - 12 V enables fastest factory programming; 3.3 V VPP allows simplified single-rail 3V system design. |
| Hardware Write Protection | Dedicated TBL (Top Boot Sector) and WP (All Other Sectors) pins - provides physical, non-volatile lock independent of register state. |
| Timing Interface | CLK input synchronized to 33 MHz PCI clock; supports TAR/SYNC protocol with wait-state insertion - ensures deterministic timing in x86 platform environments. |
| Identification & Select | ID[3:0] strapping inputs (with internal 20–100 kΩ pull-downs) - enables multi-device FWH bus configuration with unique device addressing. |
| General-purpose Inputs | FGPI[4:0] (5 pins) readable via FWH registers - provides board-level status signaling (e.g., jumper settings, revision ID) without additional GPIO controllers. |
Pinout & Package
AT49LW080-33JX is available in two industry-standard packages: 32-lead PLCC and 40-lead TSOP. The JX suffix denotes the 32-lead PLCC variant with lead-free (Pb/Halide-free) green packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IC | Interface Configuration Input | Selects FWH (low) or A/A Mux (high) mode at power-up/reset - determines functional interface before initialization. |
| RST / INIT | Reset Inputs | Active-low dual reset (RST and INIT internally OR'd); forces high-impedance outputs and resets sector locks - ensures safe boot state after power cycle. |
| CLK | FWH Clock Input | 33 MHz PCI-synchronous clock - defines timing for all FWH transactions including preamble, TAR, and SYNC fields. |
| FWH[4:0] | FWH Communication Signals | FWH[3:0]: multiplexed address/control/data; FWH4: cycle start/abort indicator - implements LPC-compatible FWH protocol per Intel specification. |
| TBL / WP | Hardware Write-protect Inputs | TBL: locks top sector (sector 15); WP: locks sectors 0–14 - physical protection active regardless of software lock register state. |
| ID[3:0] | Device Identification Inputs | Strapped 4-bit ID for multi-FWH bus arbitration - boot device must be 0000; enables up to 16 uniquely addressed FWH devices on same bus. |
| FGPI[4:0] | General-purpose Inputs | Board-level status inputs readable via FWH registers - supports flexible platform design (e.g., SKU detection, revision encoding). |
| VPP | Erase/Program Supply | Accepts 3.3 V or 12 V - 12 V enables fastest factory throughput; 3.3 V allows tie-to-VCC for low-power in-system use. |
Key Features
| Feature | Design Value |
|---|---|
| Firmware Hub (FWH) Compliance | Fully compatible with Intel 82802AC/AB and ICH-based platforms - enables drop-in replacement in legacy BIOS architectures without firmware or hardware redesign. |
| Dual-Mode Interface Architecture | Separates secure runtime access (FWH) from high-speed manufacturing programming (A/A Mux) - eliminates need for external programmers in production while preserving in-system update capability. |
| Hardware + Software Sector Locking | TBL/WP pins enforce physical write-protection; sector-lock registers provide fine-grained software control - layered security prevents accidental or malicious corruption of boot code. |
| PCI-Compliant Timing & Signaling | 33 MHz synchronous operation with TAR/SYNC handshake and wait-state support - guarantees interoperability with Intel I/O Controller Hub (ICH) and avoids timing margin violations. |
| Green Packaging | Pb/Halide-free 32-lead PLCC (JX suffix) - meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 2a standards for lead-free assembly. |
Applications
| Desktop Motherboard BIOS Storage | Industrial Control System Firmware |
|---|---|
|
Use Scenario: Storing and executing core boot firmware on ATX motherboards using Intel 8xx/E7xx chipsets. IC Role / Device Role / Timing Role: Firmware Hub (FWH) Flash memory providing nonvolatile BIOS code storage with 33 MHz synchronous read access via LPC bus. Use Value: Enables secure, fast boot with hardware sector locking (TBL/WP) to protect critical boot vectors and recovery code from overwrite. |
Use Scenario: Hosting field-upgradable firmware in ruggedized industrial PCs deployed in factory automation systems. IC Role / Device Role / Timing Role: Primary firmware storage device interfacing with Intel E8xxx-series chipsets via FWH protocol under extended temperature conditions. Use Value: Dual-interface support allows factory pre-programming (A/A Mux) and in-field updates (FWH), while FGPI inputs enable hardware revision tracking. |
| Embedded Server Platform Initialization | Legacy Embedded PC BIOS Replacement |
|
Use Scenario: Providing boot firmware for entry-level rack-mounted servers based on Intel E7xxx chipsets with integrated graphics. IC Role / Device Role / Timing Role: Nonvolatile memory mapped into system memory space via FWH interface; accessed during Power-On Self-Test (POST). Use Value: Uniform 64-Kbyte sectors allow partial firmware updates without erasing entire image, reducing downtime during maintenance windows. |
Use Scenario: Replacing obsolete Intel 82802AB devices in long-lifecycle embedded PCs used in medical diagnostics equipment. IC Role / Device Role / Timing Role: Pin- and function-compatible Firmware Hub Flash memory supporting identical FWH command set and timing parameters. Use Value: Direct drop-in replacement with identical PLCC-32 footprint, eliminating PCB redesign and qualification effort for legacy product sustainment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Firmware Hub Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W39L080PZ | Same 8-Mbit density, PLCC-32, FWH-compatible; lacks FGPI inputs and dual VPP support - only 3.3V VPP capable. | Supports basic FWH boot but cannot implement board-level strapping or high-speed 12V factory programming. | Choose when cost sensitivity outweighs need for manufacturing flexibility or platform identification features. |
| SST39VF800A-70-4C-NHE | Parallel NOR Flash (not FWH-compliant); 44-pin TSOP; requires external address latching and glue logic for LPC integration. | Requires significant hardware redesign to replace AT49LW080-33JX - not suitable for drop-in BIOS replacement. | Consider only for new designs where FWH interface is unnecessary and parallel interface simplifies controller integration. |
Compared with W39L080PZ and SST39VF800A-70-4C-NHE, the AT49LW080-33JX uniquely combines Intel FWH protocol compliance, hardware write-protection pins, FGPI inputs, and dual VPP support in a single 32-lead PLCC package - making it the only option that preserves both platform security and manufacturing efficiency in legacy Intel chipset designs.
Availability
AT49LW080-33JX is available at Aetrix Electronics and suitable for desktop motherboard BIOS storage, industrial control system firmware, embedded server platform initialization, and legacy embedded PC BIOS replacement requiring stable component supply across extended product lifecycles.
Supply support for AT49LW080-33JX 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 is a global semiconductor company specializing in microcontrollers, analog components, and memory solutions, with a strong focus on embedded control and secure firmware technologies.
The AT49LW080-33JX belongs to Microchip's Firmware Hub Flash memory product line, engineered specifically to meet Intel's FWH specification for BIOS/firmware storage in x86 platforms - prioritizing security, reliability, and backward compatibility in PC and industrial computing applications.
FAQ
What is the primary interface protocol supported by the AT49LW080-33JX?
The AT49LW080-33JX primarily supports the Intel Firmware Hub (FWH) interface - a 5-signal, 33 MHz synchronous protocol compliant with LPC bus specifications. This interface enables secure in-system read/write access to BIOS firmware and register space. The device also supports an Address/Address Multiplexed (A/A Mux) interface for high-speed manufacturing programming, selected via the IC pin at power-up.
Does the AT49LW080-33JX require a 12V supply for normal operation?
No, the AT49LW080-33JX does not require 12V for normal operation. Its VCC supply is strictly 3.3V ± 0.3V. The VPP pin accepts either 3.3V or 12V: 3.3V VPP enables in-system programming with simplified power design (VPP tied to VCC), while 12V VPP is optional and used only to accelerate factory programming throughput - it is not recommended for runtime FWH operation.
How does hardware write protection work on the AT49LW080-33JX?
The AT49LW080-33JX implements two dedicated hardware write-protection pins: TBL (Top Boot Sector Lock) and WP (Write Protect). When TBL is low, sector 15 (top 64 Kbytes) is locked against program/erase regardless of software register state. When WP is low, sectors 0–14 are locked. Both pins are sampled at the start of each operation and override corresponding sector-lock register bits - ensuring physical protection even if firmware is compromised.
Can the AT49LW080-33JX be used as a direct replacement for Intel 82802AB devices?
Yes, the AT49LW080-33JX is explicitly designed as a functionally and pin-compatible replacement for Intel 82802AB and 82802AC Firmware Hub devices. It matches the same 32-lead PLCC package, FWH timing parameters, command set, and interface behavior - enabling drop-in replacement in existing motherboard designs without PCB or firmware modifications.
What is the role of the FGPI pins on the AT49LW080-33JX?
The five FGPI[4:0] (Firmware General Purpose Input) pins on the AT49LW080-33JX provide board-level status signals readable via FWH registers - such as jumper configurations, hardware revision codes, or feature-enable settings. These inputs support platform design flexibility without requiring additional GPIO controllers, and must be held at stable logic levels before and during FWH read cycles to ensure reliable sampling.
AT49LW080-33JX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- 33 MHz
- Write Cycle Time - Word, Page:
- 300µs
- Access Time:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49LW080-33JX FAQ
1.How can I place an order for AT49LW080-33JX through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LW080-33JX 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 AT49LW080-33JX reliable?
The price and inventory of AT49LW080-33JX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LW080-33JX is usually 5 days.
3.What payment methods are accepted for AT49LW080-33JX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LW080-33JX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LW080-33JX?
AT49LW080-33JX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LW080-33JX 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 AT49LW080-33JX?
For technical support, including AT49LW080-33JX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LW080-33JX requirements.
6.How does Aetrix verify that AT49LW080-33JX is sourced from the original manufacturer or authorized distributors?
All AT49LW080-33JX 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 AT49LW080-33JX meets industry standards.
7.What is the process for return or replacement of AT49LW080-33JX?
All AT49LW080-33JX units undergo pre-shipment inspection (PSI). If there is an issue with AT49LW080-33JX, 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 AT49LW080-33JX part is unused and in its original packaging.
Return procedure for AT49LW080-33JX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LW080-33JX Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
