CF1155 Datasheet, PDF (4/7 Pages) Nippon Precision Circuits Inc – Melody LSIs

CF1155 series
Level hold 2
When LH goes HIGH, a single melody play starts. Melody play continues until the single melody ends or LH
goes open circuit or LOW, whichever occurs first.
LH
OUT
Oscillator
270kΩ
Pull-down resistance
1 TUNE
1MΩ
270kΩ 1MΩ 270kΩ
One-shot
When OSH goes HIGH, a single melody play starts. Melody play continues until the melody ends, even if OSH
goes open circuit or LOW mid melody. However, if the OSH input goes HIGH again during melody play, the
melody play restarts from the beginning.
OSH
OUT
Oscillator
1 TUNE
Pull-down resistance
270kΩ
1MΩ
270kΩ
1 TUNE
From the begining
1MΩ
270kΩ 270kΩ _270kΩ
1MΩ 1MΩ
NIPPON PRECISION CIRCUITS—4