TWR-K60N512-KEIL Freescale Semiconductor, TWR-K60N512-KEIL Datasheet - Page 135

• Manufacturer Part Number: TWR-K60N512-KEIL
• Description: K60N512 Keil Tower Kit
• Manufacturer: Freescale Semiconductor
• Series: Kinetisr
• Type: MCUr

Specifications of TWR-K60N512-KEIL

• Rohs Compliant: YES
• Contents: 4 Boards, Documentation, DVD
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Freescale Tower System, K60N512

14.6.3 Layout recommendations
Freescale Semiconductor
• Route the USB D+ and D- signals as parallel 90 Ω differential pairs.
• Match the trace lengths as closely as possible. Matching within 150 mils is a good
• Try to maintain short trace lengths, not longer than 15 cm
• Avoid placing USB differential pairs near signals, such as clocks, periodic signals,
• Minimize vias and corners.
• Route differential pairs on a signal layer, next to the ground plane.
• Avoid signal stubs
guideline
and I/O connectors, that might cause interference.
Figure 14-12. USB layout recommendations
Kinetis Quick Reference User Guide, Rev. 0, 11/2010
Figure 14-11. Components and placement
Chapter 14 Universal Serial Bus OTG Module
135