CF1156 series

NIPPON PRECISION CIRCUITS INC.—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

BO

LH

300k

Ω

90k

Ω

Pull-down resistance

90k

Ω

300k

Ω

90k

Ω

1 TUNE

Oscillator

BO

OSH

300k

Ω

90k

Ω

Pull-down resistance

90k

Ω

300k

Ω

90k

Ω

1 TUNE

90k

Ω 90kΩ

From the begining

300k

Ω 300kΩ