FreeCalypso > hg > fc-small-hw

diff duart28/src/MCL @ 28:bd7eec55ebc0

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duart28: new design ideas * added input buffers (LVC with Ioff feature) to prevent high current flow from powered-up target into powered-down FT2232D inputs; * added series resistors on outputs to limit current flow from powered-up adapter into powered-down Calypso target; * buffer IC changed from 74LVC125A to 74LVC541A.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 28 Jun 2020 22:06:24 +0000
parents b58388f57c16
children ccb544045646
line wrap: on
line diff
--- a/duart28/src/MCL	Sat Jun 13 18:12:28 2020 +0000
+++ b/duart28/src/MCL	Sun Jun 28 22:06:24 2020 +0000
@@ -99,16 +99,23 @@
  footprint=file:TLV702xxDBV
  npins=5
 
+part 74LVC541A:
+ device=74LVC541A
+ manufacturer=Nexperia
+ manufacturer_part_number=74LVC541APW
+ description=Octal buffer IC, TSSOP20 package
+ vendor=Digi-Key
+ vendor_part_number=1727-6370-1-ND
+ footprint=file:TSSOP20_MNF
+ npins=20
+
 # buffer for driving outputs from the adapter
 U5:
- device=74LVC125A
- manufacturer=Nexperia
- manufacturer_part_number=74LVC125APW
- description=Quad buffer IC, TSSOP14 package
- vendor=Digi-Key
- vendor_part_number=1727-2868-ND
- footprint=file:TSSOP14_MNF
- npins=14
+ part=74LVC541A
+
+# buffer for inputs coming into the adapter
+U6:
+ part=74LVC541A
 
 # Crystal