CF1155 series

NIPPON PRECISION CIRCUITS—2

PAD DESCRIPTION

SPECIFICATIONS

Absolute Maximum Ratings

Electrical Characteristics

Name

Function

OSH, LH

Melody mode control inputs. Built-in pull-down resistors mean LOW -level signals are obtained when inputs are open circuit. The

resistance of the pull-down resistor varies with the applied voltage, as described in the Electrical Characteristics.

OUT, OUT

Piezoelectric speaker driver outputs. Both pins are LOW in non-play mode. OUT is LOW and O U T is HIGH during output for a

m usical rest note. Both pins are HIGH during the gap between musical notes.

V D D

V S S

Ground

T1, T2, T C

Test inputs. Pull-down resistor built-in.

TO

Test output. The oscillator frequency (typ. 50kHz) is output for monitoring pur poses.

P arameter

Symbol

Condition

Rating

Unit

Supply voltage range

−0.3 to 5.0

V

Input voltage range

V

Operating temperature range

−20 to 80

°C

Storage temperature range

−65 to 150

°C

P arameter

Symbol

Condition

Rating

Unit

min

typ

m a x

Operating voltage

1.2

1.5

3.6

V

1. Measurement circuit

Non-play mode

–

0.01

0.3

µ A

Melody modes: O U T, O U T open

–

2 5

5 0

µ A

LH, OSH LOW -level input voltage

––

V

LH, OSH HIGH-level input voltage

–

–

V

LH, OSH LOW -level input current

0.7

1.5

3.0

µ A

LH, OSH HIGH-level input current

0.7

1.5

3.0

µ A

OUT, OUT L OW -level output current

2.0

–

–

m A

OUT, OUT HIGH-level output current

2.0

–

–

m A

TO oscillator frequency

35

50

65

k H z

TO frequency stability (relative to

voltage)

∆f/f

1

–

1

–

%/0.1V

∆f/f

2

–

2

–

%/1V

TO oscillator start voltage

–

–

1.2

V

TO oscillator stop voltage

–

–

1.2

V

VDD

VSS

A

1.5V

2. Measurement circuit

VDD

LH

VSS

A

1.5V