YTD428_07 Datasheet, PDF (3/28 Pages) YAMAHA CORPORATION – IDSU ISDN DSU for Terminal Equipment

CONTENTS
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Contents
1. INTRODUCTION ..................................................................................... 2
1.1 Features ................................................................................................................................ 3
2. BLOCK DIAGRAM .................................................................................. 4
2.1 Internal Block Diagram .......................................................................................................... 4
2.2 DSU Configuration Example ................................................................................................. 5
3. PIN DESCRIPTIONS .............................................................................. 7
3.1 Pin Assignments .................................................................................................................... 7
3.2 Pin Functions ........................................................................................................................ 8
4. DETAILS OF FUNCTIONS.................................................................... 13
4.1 U Reference Point Section .................................................................................................. 13
4.2 Circuit Termination / Line Termination Section .................................................................... 13
4.3 Interface Switch Section ...................................................................................................... 14
4.4 T Reference Interface Section ............................................................................................ 15
5. ELECTRICAL CHARACTERISTICS ..................................................... 16
5.1 Absolute Maximum Ratings ................................................................................................. 16
5.2 Recommended Operating Conditions ................................................................................. 16
5.3 DC Characteristics .............................................................................................................. 17
5.4 AC Characteristics ............................................................................................................... 18
6. PIN DESCRIPTIONS ............................................................................ 22
REFERENCE CIRCUIT ............................................................................ 23