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LPC47B277QFP is listed in the Application Specific Microcontrollers range at ChipApex. The manufacturer field lists SMSC. Its product description is SUPER I/O CONTROLLER WITH LPC IN. Review the specifications below when checking this part for your BOM.
Application Specific Microcontrollers specifications for LPC47B277QFP
- Description：SUPER I/O CONTROLLER WITH LPC IN
- Series：*
- Mfr：SMSC
- Package：Bulk
- Applications：-
- Core Processor：-
- Program Memory Type：-
- Controller Series：-
- RAM Size：-
- Interface：-
- Number of I/O：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
Application Specific Microcontrollers datasheet and documents for LPC47B277QFP
Application Specific Microcontrollers Overview
The SMSC LPC47B277QFP is a Low Pin Count (LPC) Super I/O controller designed for PC99 and PC01 compliant systems. It operates at 3.3V with 5V-tolerant SIO block inputs. Key features include ACPI 1.0/2.0 compliance, two fan speed control outputs, two fan tachometer inputs, and a programmable wake-up event interface. The device integrates an ISA Plug-and-Play compatible register set, intelligent auto power management, and system management interrupt support. It provides 37 general-purpose input/output pins and dual game port interfaces with MPU-401 MIDI support.
Application Specific Microcontrollers Feature Summary
- ACPI 1.0/2.0 compliant LPC interface with 3.3V operation
- Integrated floppy disk controller supporting up to two drives
- Dual fan speed control outputs and two tachometer inputs
- 37 General Purpose Input/Output (GPIO) pins
Application Specific Microcontrollers Applications
- PC99 and PC01 compliant motherboard designs
- Notebook computer I/O controllers
- Systems requiring hardware monitoring and fan control
Application Specific Microcontrollers Procurement Notes
Verify the specific package variant, as the model suffix QFP indicates a Quad Flat Package. Confirm pin compatibility and voltage levels against the official datasheet before integration. Ensure the design supports the required LPC interface signals and GPIO configurations specified in the component documentation.
Application Specific Microcontrollers Selection Notes
Select this component for applications requiring a unified Super I/O solution with integrated floppy disk controller and hardware monitoring capabilities. It is suitable for legacy PC architectures needing ACPI compliance and low-pin-count connectivity. Evaluate the need for its specific GPIO count and fan control outputs against alternative Super I/O devices.
Application Specific Microcontrollers Part Context
The LPC47B277 is part of the SMSC LPC47 series of Super I/O chips. These components consolidate multiple legacy I/O functions into a single chip, reducing board space and complexity. The series is widely used in desktop and notebook motherboards from the late 1990s and early 2000s to manage serial ports, parallel ports, keyboard/mouse interfaces, and floppy disk controllers.
Application Specific Microcontrollers Replacement Considerations
Direct replacements may include other SMSC LPC47 series variants or compatible Super I/O controllers from manufacturers like Winbond or ITE. Verify pin-to-pin compatibility and register-level software compatibility when substituting. Ensure the replacement supports the same ACPI version and LPC interface timing requirements.
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