Microchip SCH3114-NU, IO Controller, 128-Pin VTQFP

  • RS stock no. 672-6878
  • Mfr. Part No. SCH3114-NU
  • Manufacturer Microchip
Technical data sheets
Legislation and Compliance
COO (Country of Origin): MY
Product Details

SCH311x Super I/O Controllers

The SCH3114 Super I/O Controller chip integrates many standard PC motherboard hardware functions into a single device.


• Watchdog Timer • Resume and Main Power-Good Generator
• Programmable Clock Output to 16Hz
• 2.88MB Floppy Disk Controller for 2 x drives
• Enhanced Digital Data Separator
• Keyboard Controller, 8042 software compatible
• 4 x Multiple Full Function Serial Ports
• Infrared Port, Multiprotocol, IrDA 1.0 Compliant
• Multi-Mode™ Parallel Port with ChiProtect™
• Hardware monitor for power supplies and temperature with fan control
• IDE Reset Output and 3 x PCI Reset Buffers with Software Control Capability
• Power Button Control and AC Power-Failure Recovery

Common Features

• Low Pin Count Bus (LPC) Interface • Programmable Wake-up Event (PME) Interface
• PC99, PC2001 Compliant
• ACPI 2.0 Compliant
• Serial IRQ Interface compatible with Serialized IRQ support for PCI Systems
• ISA Plug-and-Play compatible Register Set
• 4 x Address Options for Power-On Configuration Port
• System Management Interrupt (SMI)
• 40 x GPIO pins
• 6 x GPIO pins with VID compatible inputs
• Support for Power Button on PS/2 Keyboard
• Security Key Register (32 byte) for Device Authentication
• +3.3Vdc operation (SIO block is +5V tolerant)
• Operating temperature range: 0 to +70°C

RS Product Codes

672-6878 SCH3114-NU Super I/O Controller, 4 x serial ports 912-6861 SCH3114-NU Super I/O Controller, 4 x serial ports (Pack of 90)

Super I/O Controllers

The Super I/O Controller is a single chip that performs many functions that used to take several pieces of hardware in the past. This standardizes and simplifies the design, and thus reduces cost. The Super I/O chip typically is responsible for controlling the slower-speed, mundane peripherals found in every PC. Since these devices have been mostly standardized, they are virtually the same on every PC and it is easier to integrate these into a commodity chip instead of worrying about them for each motherboard design.

Attribute Value
Mounting Type Surface Mount
Package Type VTQFP
Pin Count 128
Dimensions 14 x 14 x 1mm
Height 1mm
Length 14mm
Maximum Operating Temperature +70 °C
Minimum Operating Temperature 0 °C
Width 14mm
532 Available from UK/Europe in 4–6 working days (Covid-19 flight delays could impact quoted delivery times) for collection or delivery to major cities (Heavy, hazardous or lithium product excluded. Delivery T&C's apply)
Price (Excl VAT) Each
R 135.80
(exc. VAT)
R 156.17
(inc. VAT)
Per unit
1 - 4
R 135.80
5 - 19
R 133.08
20 - 49
R 129.09
50 - 99
R 123.93
100 +
R 118.97
Not Available for premium delivery
Packaging Options: