SCH3223I-7U-TR

Application Specific Microcontrollers Overview

The SCH3223I-7U-TR is a 3.3V Super I/O controller featuring an LPC interface, compliant with PC99/PC2001 and ACPI 2.0 standards. It integrates two high-speed NS16C550A-compatible UARTs supporting baud rates up to 1.5 Mbps, hardware monitoring for voltage and temperature, and power management logic. The device operates within an industrial temperature range of -40°C to +85°C and is housed in a 64-ball WFBGA package.

Application Specific Microcontrollers Feature Summary

• LPC Bus Interface: Supports frequencies from 19MHz to 33MHz with ISA Plug-and-Play compatibility.
• Dual Serial Ports: Two full-function UARTs with 16-byte FIFOs and RS485 auto-direction control.
• Hardware Monitoring: Monitors multiple voltages (+2.5V, +5V, +12V, Vccp) and includes remote thermal diode sensing.
• Power Management: Includes programmable wake-up events (PME), system management interrupts (SMI), and AC power failure recovery.

Application Specific Microcontrollers Applications

• Industrial PC motherboard designs requiring robust I/O control.
• Embedded systems needing integrated hardware monitoring and fan control.
• Legacy peripheral interfacing via LPC bus and serial ports.

Application Specific Microcontrollers Procurement Notes

Verify the specific suffix 'TR' against official Microchip documentation to confirm tape-and-reel packaging status, as datasheets may primarily reference tray configurations. Confirm current availability and lifecycle status directly with the manufacturer or authorized distributors, as component supply can change without immediate public notice.

Application Specific Microcontrollers Selection Notes

Select this component for applications requiring a 3.3V operating voltage with 5V-tolerant SIO blocks. Ensure the design accommodates the 64-ball WFBGA package with 0.5mm pitch. Verify that the required LPC bus frequency falls within the 19MHz to 33MHz support range and that industrial temperature ratings (-40°C to +85°C) meet environmental specifications.

Application Specific Microcontrollers Part Context

The SCH3223 series serves as a low-pin-count input/output controller for PC architectures. It consolidates functions typically handled by multiple discrete chips, including Super I/O, hardware monitoring, and reset generation, into a single integrated circuit to reduce board space and complexity.

Application Specific Microcontrollers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Microchip Technology for current alternative components or family replacements if discontinuation is a concern.

Application Specific Microcontrollers FAQ

What is the maximum baud rate supported by the serial ports?

The SCH3223 supports data rates up to 1.5 Mbps on its two NS16C550A-compatible UARTs.

How does the device handle wake-up events when VCC is removed?

The device uses a trickle supply (VTR) to maintain functionality for programmable wake-up events (PME) and other logic when the main VCC power is removed.

Is the SIO block compatible with 5V signals?

Yes, while the device operates at 3.3V, the SIO Block inputs are 5V tolerant.