•  BC-Link™ Slave Interface to Host EC
• 3-pin point-to-point communication link to Embedded Controller
•  Optional SMBus Slave Interface to Host EC
• BC-Link/SMBus protocol autodetect
• Strap pin selects between two slave addresses at POR
• Dynamically programmed slave address after POR
•  BC-Link Companion Switch, ECE1119 only
• 3 External Downstream Ports for additional BC-Link companion connectivity
• SMBus Switch, ECE1119 only
• External Ports for connectivity to additional 3 Bus segments
• Keyboard Scan Matrix
• Up to 23x8 Keyboard Scan Matrix in ECE1119
• Up to 19x8 Keyboard Scan Matrix in ECE1117
• LED Output Pins
• 9 LED Output Pins in ECE1119 – 6 with 20mA current sink – 3 with 4mA current sink
• 7 LED Output Pins in ECE1117 – 4 with 20mA current sink – 3 with 4mA current sink
• Multiple Clock Rates
• Breathe capability
• Open Drain
• 5V tolerant
• All can be synchronized
• General Purpose I/O Pins
• 20 General Purpose I/O Pins ECE1119
• 16 General Purpose I/O Pins ECE1117
• All are BC Bus addressable I/O Pins
• All are Maskable Hardware Wake-Event Capable
• All are Programmable Open-Drain/Push-Pull

The typical usage model is to locate the ECE1119/ECE1117 in the keyboard assembly.

By mounting the ECE1119/ECE1117 onto the keyboard assembly, the keyboard and touchpad/point stick PS/2 signals and the backlight PWMs are routed from the keyboard to the motherboard over a single BC-Link connection. In all other notebook designs without BC companion device, the signals from the keyboard matrix, PS/2 and LED are routed to the motherboard via a wide ribbon extension for the keyboard switch circuit. 

ECE1119 communicates to the upstream host via BC-Link or SMBus and provides up to three downstream BC-LinkTM or SMBus ports to permit communication between the upstream host and downstream companion devices.

Family parts
ECE1117-HZH
ECE1117-HZH-1
ECE1117-HZH-1-TR
ECE1117-HZH-TR
ECE1117-Y3-1-TR