CRE401: Difference between revisions

From NeoGeo Development Wiki
Jump to navigation Jump to search
(Created page with "SIL capacitor/resistor array used for input ports. Also called "CR10-A-*" on late NEO-CDD boards. Drop-in replacements seem hard to find File:Cre401.png [[http://www.b…")
 
mNo edit summary
(3 intermediate revisions by the same user not shown)
Line 1: Line 1:
SIL capacitor/resistor array used for input ports. Also called "CR10-A-*" on late [[NEO-CDD boards]]. Drop-in replacements seem hard to find  
Serial-In-Line capacitor and resistor array used on NeoGeo boards, to protect input ports and auxiliary circuits ([[MV-LED]]). Also found as "CR10-A-*" on late [[NEO-CDD boards]]. Drop-in replacements seem hard to find but using common 1/4W resistors seems to be enough for a quick fix.
 
They are composed of 4 identical circuits. The leftmost pin's net pulls all outputs through 1k resistors. The 330 ohm resistors provide current protection (sometimes as fuses), the capacitors smooth out eventual spikes.


[[File:Cre401.png]]
[[File:Cre401.png]]
Line 5: Line 7:
[[http://www.bitechnologies.com/pdfs/cr.pdf Original manufacturer datasheet ("-A Circuit")]]
[[http://www.bitechnologies.com/pdfs/cr.pdf Original manufacturer datasheet ("-A Circuit")]]


[[Category:Electronics]]
[[Category:Chips]]
[[Category:Repairs]]

Revision as of 01:50, 3 March 2016

Serial-In-Line capacitor and resistor array used on NeoGeo boards, to protect input ports and auxiliary circuits (MV-LED). Also found as "CR10-A-*" on late NEO-CDD boards. Drop-in replacements seem hard to find but using common 1/4W resistors seems to be enough for a quick fix.

They are composed of 4 identical circuits. The leftmost pin's net pulls all outputs through 1k resistors. The 330 ohm resistors provide current protection (sometimes as fuses), the capacitors smooth out eventual spikes.

File:Cre401.png

[Original manufacturer datasheet ("-A Circuit")]