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atusb/usb.sch: specified capacitance of TVSs (33 pF) and explained why
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EESchema Schematic File Version 2 date Mon Jan 3 15:54:00 2011
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EESchema Schematic File Version 2 date Mon Jan 3 16:32:06 2011
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LIBS:power
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LIBS:power
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LIBS:device
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LIBS:device
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LIBS:conn
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LIBS:conn
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@ -22,6 +22,8 @@ Comment2 ""
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Comment3 ""
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Comment3 ""
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Comment4 ""
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Comment4 ""
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$EndDescr
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$EndDescr
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Text Notes 2600 5000 0 60 ~ 0
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USB 2.0 limits the capacitative load\non full-speed drivers to 50 pF.
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Wire Notes Line
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Wire Notes Line
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6950 900 6900 900
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6950 900 6900 900
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Wire Notes Line
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Wire Notes Line
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@ -316,6 +318,7 @@ P 3700 4300
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F 0 "VR3" V 3780 4300 50 0000 C CNN
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F 0 "VR3" V 3780 4300 50 0000 C CNN
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F 1 "5V6" V 3700 4300 50 0000 C CNN
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F 1 "5V6" V 3700 4300 50 0000 C CNN
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F 2 "0402" H 3700 4300 60 0001 C CNN
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F 2 "0402" H 3700 4300 60 0001 C CNN
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F 4 "33pF" V 3600 4400 50 0000 C CNN "Field4"
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1 3700 4300
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1 3700 4300
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-1 0 0 -1
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-1 0 0 -1
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$EndComp
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$EndComp
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@ -326,6 +329,7 @@ P 3400 4300
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F 0 "VR2" V 3480 4300 50 0000 C CNN
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F 0 "VR2" V 3480 4300 50 0000 C CNN
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F 1 "5V6" V 3400 4300 50 0000 C CNN
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F 1 "5V6" V 3400 4300 50 0000 C CNN
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F 2 "0402" H 3400 4300 60 0001 C CNN
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F 2 "0402" H 3400 4300 60 0001 C CNN
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F 4 "33pF" V 3300 4400 50 0000 C CNN "Field4"
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1 3400 4300
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1 3400 4300
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-1 0 0 -1
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-1 0 0 -1
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$EndComp
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$EndComp
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@ -336,6 +340,7 @@ P 3100 4300
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F 0 "VR1" V 3180 4300 50 0000 C CNN
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F 0 "VR1" V 3180 4300 50 0000 C CNN
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F 1 "5V6" V 3100 4300 50 0000 C CNN
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F 1 "5V6" V 3100 4300 50 0000 C CNN
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F 2 "0402" H 3100 4300 60 0001 C CNN
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F 2 "0402" H 3100 4300 60 0001 C CNN
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F 4 "33pF" V 3000 4400 50 0000 C CNN "Field4"
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1 3100 4300
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1 3100 4300
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-1 0 0 -1
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-1 0 0 -1
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$EndComp
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$EndComp
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