N537A090 controller equivalent, 2-ch speech/dual tone/lcd controller.
....... 4 3. BLOCK DIAGRAM...... 5 4. PIN DESCRIPTION ..... 6 5. ELECTRICAL CHARACTERISTICS......... 8
5.1 ABSOLUTE MAXIMUM RATINGS... 8 5.2 D.C. CHARATERISTICS.
... 3 2. FEATURES ....... 4 3. BLOCK DIAGRAM...... 5 4. PIN DESCRIPTION ..... 6 5. ELECTRICAL CHARACTERISTICS......... 8
5.1 ABSOLUTE MAXIMUM RATINGS... 8 5.2 D.C. CHARATERISTICS..
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