SM1350 series

NIPPON PRECISION CIRCUITS—6

AC Characteristics

1.Oscillator start - up time = [time from when STN goes LOW to when TO goes HIGH] - 25.0

µs.

2.The time taken for fast damping to reduce the envelope to 0 level.

S0 to S3, MODE, LH, STOP, STN, ICN

LOW-level input current

–30

50

µA

BUSYN, CT, TO HIGH-level output

current

2.0

–

–

mA

BUSYN, CT,TO LOW-level output current

2.0

–

–

mA

MSB, MSBN HIGH-level output current

3.0

–

–

mA

MSB, MSBN LOW-level output current

3.0

–

–

mA

–

–

7.7

mA

1. Supply voltage ratings shown are with oscillator running and all functions operating normally.

2. Clock frequency and duty cycle are ratings for the clock input on pin XT.

3. Output current when 20 k

Ω volume control resistor is connected to VOL, and all D/A converter bits ON, measured using the following circuit.

P arameter

Symbol

Condition

Rating

Unit

min

typ

m a x

Initialization clear time

1.0

–

–

µsec

STN pulsewidth

Pre-input option selected

81.9

–

–

msec

–

–

500

µsec

Oscillator stop time

180.2

–

196.7

msec

D/A converter rise delay time

–

81.9

–

msec

D/A converter fall delay time

180.2

–

196.7

msec

STN, STOP standby chattering time

–

81.9

–

msec

STN, STOP oscillator chattering time

Oscillator running

65.5

–

82.0

msec

S0 to S3 melody select chattering time

65.5

–

131.1

msec

MODE, LH read timing

–

15.9

–

µsec

S0 to S3 read timing

–

31.9

–

µsec

BUSYN fall delay time

–

8.2

–

msec

–

–

8.2

msec

Melody start delay time

–

16.4

–

msec

STOP pulsewidth

Pre-input option selected

81.9

–

–

msec

ENDN delay time

A-class output option

–

–

8.2

msec

ENDN pulsewidth

A-class output option

–

16.0

–

µsec

P arameter

Symbol

Condition

Rating

Unit

min

typ

m a x

VDD

VOL

VSS

20k

Ω

0.7V

A

SP,SPN