NPC SM1350xxxM Datasheet
SM1350 series
NIPPON PRECISION CIRCUITS—1
NIPPON PRECISION CIRCUITS INC.
High Tone Quality Melody LSI
OVERVIEW
The SM1350 series are single-chip high tone quality
melody ICs, fabricated using NPC’s Molybdenumgate CMOS process. Melodies are selected in serial
or binary (parallel) mode, up to a maximum of 16
melody blocks. There are 4 sound generators
incorporated to produce 4 kinds of output tone
controlled by 16-tone data, making these ICs ideal
for mechanical clocks and similar applications where
high tone quality output is demanded.
FEATURES
■
Basic Functions
• 4.0 MHz oscillator frequency
• Power-save function
- Oscillator stopped when no output
- S0 to S3, MODE, LH pull-up resistors open
• BTL or A-class outputs
• Chattering prevention circuit (STN, STOP, S0
to S3)
• 10-bit D/A converter
■
Sound Generator Functions
• DWS (dual wave synthesis) sound generators
• 4 simultaneous sounds for 4 tones
• G2 to F#7 note range
• 16-tone programmable
■
Melody Functions
• Up to 16 programmable melodies (singly or in
medleys)
• 1024-step length (notes, rests, jumps, end
codes)
• Level hold/one-shot melody modes
• Serial/binary (parallel) select modes
• 4.8 to 605.6 tempo range in 127 steps
• 12 rhythm values
• Ties and slurs programmable
■
Control Signal Outputs
• BUSYN signal LOW during melody output
• CT signal output for external control
■
2.4 to 5.5 V supply voltage
■
Package
• 24-pin SSOP (SM1350
×××
)
■
Molybdenum-gate CMOS
PINOUT
(TOP VIEW)
PACKAGE DIMENSIONS
24-pin SSOP (Unit: mm)
ORDERING INFOMATION
3
xx3ee3q . e q3hq .hh .w
Device Package
SM1350
×××
M 24pin SSOP
VDD
S0
S1
S2
S3
MODE
LH
XT
XTN
TO
T3N
T2N
T1N
MSBN
SM1
350
STOP MSB
STN
BUSYN
CT
SP
SPN
VOL
ICN VSS
1
12 13
24
0.7 0.8
0.36 0.10
10.20 0.30
10.05 0.20
0.10 0.10
2.10MAX
1.80 0.10
7.80 0.30
5.40 0.20
0.15
+
0.1
−
0.05
010
0.50 0.20
SM1350 series
NIPPON PRECISION CIRCUITS—2
BLOCK DIAGRAM
Arithmetic block Circuit
Control Circuit
Wave ROM
Parameter ROM
Input Circuit
Score ROM
DAC
Oscillator
SP
SPN
VOL
MSB
MSBN
BUSYN
CT
S3
S2
S1
S0
MODE
LH
STOP
STN
TO
T1N
T2N
T3N
XT
XTN
+
ICN
VDD
VSS
SM1350 series
NIPPON PRECISION CIRCUITS—3
PIN DESCRIPTION
Number Name I/O State
1
1. U = pull-up resistor connection, SU : pull-up resistor connection only when melody output starts,
P = p-channel open drain, C = complementary output.
U or O = pull-up resistance or open drain (master slice)
Description
2
2. BTL/A-class output mode is selected by mask option.
1 VDD – – Supply pin
2S0ISU
Binary select mode: Phrase select pins.
Serial select mode: S0 and S1 control melody output.
3S1ISU
4S2ISU
5S3ISU
6 MODE I SU Melody select mode control. Binary mode when LOW, and serial mode when HIGH.
7 LH I SU Melody output mode control. One-shot when LOW, and level hold when HIGH.
8 STOP I U or O
One-shot melody mode: Melody output stop control.
Level hold melody mode: Invalid input.
9 STN I U or O Melody start control
10 BUSYN O C Busy output signal. LOW when a melody is output.
11 CT O C External control pulse output
12 ICN I U Initialization clear input
13 VSS – – Ground pin
14 VOL I – Volume adjust control. Volume adjusted using an external resistor.
15 SPN O P
9-bit D/A converter output in BTL output mode.
VOL current output in A-class output mode.
16 SP O P
BTL output mode: 9-bit D/A converter output.
A-class output mode: 10-bit D/A converter output.
17 MSB
O C BTL output mode: Signed-bit output. HIGH when no melody is output.
I U A-class output mode: BUSYIN input
18 MSBN O C
BTL output mode: Signed-bit output. HIGH when no melody is output.
A-class output mode: ENDN output. HIGH when no melody is output.
19 T1N I U
Test signal inputs20 T2N I U
21 T3N I U
22 TO O C Test signal output. 62.5 kHz output when not in test mode.
23 XTN O – Oscillator output
24 XT I – Oscillator input
SM1350 series
NIPPON PRECISION CIRCUITS—4
SPECIFICATIONS
Absolute Maximum Ratings
VSS = 0 V
Recommended Operating Conditions
VSS = 0 V
Master slice
Underlined entries are the default standard options. Throughout this datasheet, the standard options are
assumed unless otherwise specified.
U: pull-up resistance O: open input
Parameter Symbol Condition Rating Unit
Supply voltage V
DD
−
0.3 to 7.0 V
Input voltage V
IN
VSS − 0.3 to VDD + 0.3 V
Storage temperature T
stg
−
40 to 125
°
C
Power dissipation P
D
650 mW
Soldering temperature T
sld
255
°
C
Soldering time t
sld
10 s
Parameter Symbol Condition
Rating
Unit
min typ max
Supply voltage V
DD
2.4 – 5.5 V
Operating temperature T
opr
−
20 – 80
°
C
Specifications Function Selected condition
Serial-mode melody selections 1 to 16
Melody output circuit BTL / A-class
Level-hold melody select change retrigger Yes / No
Pull-up/pull-down resistance
STN U
/ O
STOP U / O
SM1350 series
NIPPON PRECISION CIRCUITS—5
DC Characteristics
VDD = 3 V, Ta = 25 °C, VSS = 0 V, fO = 4.0 MHz
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 kΩ volume control resistor is connected to VOL, and all D/A con verter bits ON, measured using the circuit of the next page.
VDD = 5 V, Ta = 25 °C, VSS = 0 V, fO = 4.0 MHz
Parameter Symbol Condition
Rating
Unit
min typ max
Minimum operating supply voltage
1
V
MIN
– – 2.4 V
Maximum operating supply voltage
1
V
MAX
5.5 – – V
Standby current consumption I
STBY
No melody output – – 1.0 µA
Operating current consumption I
DD
BUSYN, CT, TO, SP, SPN,
MSB, MSBN all open
– – 3.5 mA
XT external capacitance C
G
–30–pF
XTN external capacitance C
D
–30–pF
Clock frequency
2
f
XTI
3.8 4.0 4.2 MHz
Clock duty cycle
2
R
XTI
40 50 60 %
S0 to S3, MODE, LH, STOP, STN, ICN
HIGH-level input voltage
V
IH
VDD − 0.3 – V
DD
V
S0 to S3, MODE, LH, STOP, STN, ICN
LOW-level input voltage
V
IL
V
SS
–VSS + 0.3 V
S0 to S3, MODE, LH, STOP, STN, ICN
HIGH-level input current
I
IH
VIH = V
DD
–1020µA
S0 to S3, MODE, LH, STOP, STN, ICN
LOW-level input current
I
IL
VIL = V
SS
–1020µA
BUSYN, CT, TO HIGH-level output
current
I
OH1
V
OH1
= VDD − 0.7 2.0 – – mA
BUSYN, CT , TO LOW-lev el output current I
OL1
V
OL1
= VSS + 0.7 2.0 – – mA
MSB , MSBN HIGH-level output current I
OH2
V
OH2
= VDD − 0.7 3.0 – – mA
MSB, MSBN LOW -level output current I
OL2
V
OL2
= VSS + 0.7 3.0 – – mA
SP, SPN output current
3
I
OH3
V
OH3
= VSS + 0.7 – – 4.0 mA
Parameter Symbol Condition
Rating
Unit
min typ max
Minimum operating supply voltage
1
V
MIN
– – 2.4 V
Maximum operating supply voltage
1
V
MAX
5.5 – – V
Standby current consumption I
STBY
No melody output – – 1.0 µA
Operating current consumption I
DD
BUSYN, CT, TO, SP, SPN,
MSB, MSBN all open
– – 9.5 mA
XT external capacitance C
G
–30–pF
XTN external capacitance C
D
–30–pF
Clock frequency
2
f
XTI
3.8 4.0 4.2 MHz
Clock duty cycle
2
R
XTI
40 50 60 %
S0 to S3, MODE, LH, STOP, STN, ICN
HIGH-level input voltage
V
IH
VDD − 0.3 – V
DD
V
S0 to S3, MODE, LH, STOP, STN, ICN
LOW-level input voltage
V
IL
V
SS
–VSS + 0.3 V
S0 to S3, MODE, LH, STOP, STN, ICN
HIGH-level input current
I
IH
VIH = V
DD
–3050µA
SM1350 series
NIPPON PRECISION CIRCUITS—6
AC Characteristics
VDD = 3 or 5 V, Ta = 25 °C, VSS = 0 V
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
I
IL
VIL = V
SS
–3050µA
BUSYN, CT, TO HIGH-level output
current
I
OH1
V
OH1
= VDD − 0.7 2.0 – – mA
BUSYN, CT , TO LOW-lev el output current I
OL1
V
OL1
= VSS + 0.7 2.0 – – mA
MSB , MSBN HIGH-level output current I
OH2
V
OH2
= VDD − 0.7 3.0 – – mA
MSB, MSBN LOW -level output current I
OL2
V
OL2
= VSS + 0.7 3.0 – – mA
SP, SPN output current
3
I
OH3
V
OH3
= VSS + 0.7 – – 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 kΩ volume control resistor is connected to VOL, and all D/A con verter bits ON, measured using the following circuit.
Parameter Symbol Condition
Rating
Unit
min typ max
Initialization clear time t
ICW
1.0 – – µsec
STN pulsewidth t
STW
Pre-input option selected 81.9 – – msec
Oscillator start-up time
1
t
XST
– – 500 µsec
Oscillator stop time t
XEN
180.2 – 196.7 msec
D/A converter rise delay time t
DAST
– 81.9 – msec
D/A converter fall delay time t
DAEN
180.2 – 196.7 msec
STN, STOP standby chattering time t
CH1
– 81.9 – msec
STN, STOP oscillator chattering time t
CH2
Oscillator running 65.5 – 82.0 msec
S0 to S3 melody select chattering time t
CH3
65.5 – 131.1 msec
MODE, LH read timing t
MR
– 15.9 – µsec
S0 to S3 read timing t
SR
– 31.9 – µsec
BUSYN fall delay time t
BYST
– 8.2 – msec
BUSYN rise delay time
2
t
BYEN
– – 8.2 msec
Melody start delay time t
PYST
– 16.4 – msec
STOP pulsewidth t
STPW1
Pre-input option selected 81.9 – – msec
ENDN delay time t
EDST
A-class output option – – 8.2 msec
ENDN pulsewidth t
EDW
A-class output option – 16.0 – µsec
Parameter Symbol Condition
Rating
Unit
min typ max
VDD
VOL
VSS
20kΩ
0.7V
V
DD
A
SP,SPN
SM1350 series
NIPPON PRECISION CIRCUITS—7
FUNCTIONAL DESCRIPTION
Chattering Prevention
STN, STOP chattering prevention function
Standby Mode
The oscillator starts when STN goes from HIGH to
LOW in standby mode. Input data is received and
melody data output starts 81.9 ms after the oscillator
starts if STN is LOW.
Oscillator starts running
After the oscillator starts running, input data is
considered valid 81.9 ms after STN and STOP have
last changed state. Input data is considered invalid
for intervals less than 65.5 ms.
Note: Refer to the "TIMING DIAGRAMS" section to confirm melody timing specifics.
Figure 1. STN, STOP chattering prevention timing (standby mode)
STN
OSC
Input
Reception
81.9ms 81.9ms
Melody
Output
Internal
Clock
Note: Refer to the "TIMING DIAGRAMS" section to confirm melody timing specifics.
Figure 2. STN, STOP chattering prevention timing ( oscillator running)
81.9ms65.5ms
STN or
STOP
Input
Reception
Internal
Clock
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