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Home >> Products >> I/O Connectivity ICs >> USB Bridge >> MCS7780

 MCS7780 -- USB 1.1 to IrDA Controller

The MCS7780 controller provides bridging between the Universal Serial Bus (USB) input and an IrDA wireless data communication port. This device contains all the necessary logic to communicate with the host computer via the USB Bus.

The MCS7780 operates in Bus-Powered mode, and uses a reduced frequency (12MHz) crystal oscillator. This combination of features allows significant cost savings in system design along with straight forward implementation of IrDA port functionality into PC peripherals using the host's USB port.


  • USB Specification 1.1 Compliant
  • Supports all USB Standard Commands
  • Full Compliance to IrDA 1.4
  • WHQL Certified
  • Low-Power CMOS Design
  • Powered from USB port
  • Single 12 MHz Crystal
  • IrDA Data Rates from 2.4 Kbps to 115.2 Kbps in SIR mode
  • Supports MIR (Medium IR) at 1.152 Mbps
  • Supports FIR (Fast IR) mode with Data Rate of 4 Mbps
  • Uses Standard IrDA Transceivers
  • LED Driver capable of 650 mA @ 5V, 25% Duty Cycle
  • Low-Profile 28-Pin SSOP Package RoHS compliant
  • Operating temperature range: 0°C to +70°C
Target Applications:
  • High-Speed IrDA Communications
  • Cell Phone Interface Cable

 Block Diagram


 Selection Guide


Technical Documentation

 Product Brief, Product Introduction and Datasheet

MCS7780 Product Brief96.8 KB2006-01-03
MCS7780 Datasheet 436.7 KB2011-11-01
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MCS7780 Reliability Report 193 KB2011-12-15
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MCS7780 RoHS Report   
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Hardware Design Documentation

 Reference Schematics

MCS7780 USB 1.1 IrDA Reference Schematic for Protel 144.2 KBv1.002011-08-18

 Bill of Materials, Application Notes and Layout Guides

MCS7780 PCB Layout Guide 213.1 KBv1.002011-09-28
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 PCB Layout, Gerber and IBIS Model

MCS7780 IBIS Model 100.1 KB2011-11-14
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Driver TypeRevision Release DateDescriptionFile Size
Apple Mac OS X 10.5 to 10.10 Drivers Installer V3.1.02015-07-06 For Apple x86/Power PC, 32-bit/64-bit platforms585.2 KB
Linux kernel 2.6.x/3.x driver v2.1.02014-01-23 For Android 1.x/2.x/3.x/4.x, up to Linux kernel 3.x13.8 KB
Windows 8.1/8.0/7/Vista/XP 32-bit Driver v1.3.2.02013-07-01 For 32-bit x86 CPU platform, WHCK certified20.6 KB
Windows 8.1/8.0/7/Vista/XP 64-bit Driver v1.3.2.02013-07-01 For 64-bit x86 CPU platform, WHCK certified22.6 KB
Windows 8.1/8.0/7/Vista/XP 32-bit/64-bit Drivers Setup Program v1.0.1.02013-07-29 For 32-bit/64-bit x86 CPU platform, WHCK certified8.7 MB
Windows CE 6.0 Driver v0.0.0.22015-03-04 For CEPC x86 platform37.9 KB
Windows CE 5.0 / Mobile 5 / Mobile 6 Driver v0.0.0.22005-12-20 For CEPC x86 platform43.6 KB
Windows CE 5.0 / Mobile 5 / Mobile 6 Driver v0.0.0.12005-10-07 For XSCALE ARM platform40 KB


click here for more MCS7780 FAQs....
Q0001: Where can I obtain the latest MCS7780 datasheet, reference schematic and other hardware design archives?
A0001: Please register MyASIX membership ( and then download the latest MCS7780 datasheet, reference schematic, PCB layout guide, etc. from ASIX I/O Connectivity Product web pages ( directly.

Q0002: Can ASIX help me to review my own MCS7780 schematic and PCB layout?
A0002: Yes, please deliver your own MCS7780 schematic and PCB layout files to ASIX's Support ( for further review before making your own MCS7780 PCB board.

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