CF1155 series

NIPPON PRECISION CIRCUITS—4

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.

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.

1 TUNE

Oscillator

OUT

LH

1M

Ω

270k

Ω

Pull-down resistance

270k

Ω

1M

Ω

270k

Ω

1 TUNE

Oscillator

OUT

OSH

1M

Ω

270k

Ω

Pull-down resistance

270k

Ω

1M

Ω

270k

Ω

1 TUNE

1M

Ω 1MΩ

270k

Ω 270kΩ

From the begining