View da108 datasheet:

DA108S1 DA112S1 ? Application Specific Discretes DIODE ARRAY A.S.D.TM APPLICATION Protectionof logic side of ISDN S-interface. Protectionof I/O lines of microcontroller. Signal conditioning. SO8 FUNCTIONAL DIAGRAM : DA108S1 FEATURES ARRAYOF 8 OR12DIODES LOW INPUT CAPACITANCE I/O 1 1 8 REF 1 SUITABLEFOR DIGITAL LINE PROTECTION I/O 2 2 7 REF 1 3 6 REF 2 I/O 3 DESCRIPTION I/O 4 4 5 REF 2 ARRAY of 8 or 12 diodes configured by cells of 2 diodes, each cell being used to protect signal line from transient overvoltagesby clamping action. FUNCTIONAL DIAGRAM : DA112S1 COMPLIESWITH FOLLOWING STANDARDS : IEC1000-4-22level 4: 15kV (air discharge) I/O 1 1 8 REF 1 8kV (contact discharge) 2 7 I/O 6 I/O 2 3 6 REF 2 I/O 3 I/O 5 I/O 4 4 5 1/5 March 1998 - Ed:4 DA108S1 /