SM1350 Datasheet, PDF (1/21 Pages) Nippon Precision Circuits Inc – High Tone Quality Melody LSI

NIPPON PRECISION CIRCUITS INC.
SM1350 series
High Tone Quality Melody LSI
OVERVIEW
The SM1350 series are single-chip high tone quality
melody ICs, fabricated using NPC’s Molybdenum-
gate 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
s 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
s Sound Generator Functions
• DWS (dual wave synthesis) sound generators
• 4 simultaneous sounds for 4 tones
• G2 to F#7 note range
• 16-tone programmable
s 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
3
3
3
3
• Ties and slurs programmable
s Control Signal Outputs
• BUSYN signal LOW during melody output
• CT signal output for external control
s 2.4 to 5.5 V supply voltage
s Package
• 24-pin SSOP (SM1350×××)
s Molybdenum-gate CMOS
PINOUT(TOP VIEW)
VDD 1
S0
S1
S2
S3
MODE
LH
STOP
STN
BUSYN
CT
ICN 12
24 XT
XTN
TO
T3N
T2N
T1N
MSBN
MSB
SP
SPN
VOL
13 VSS
PACKAGE DIMENSIONS
24-pin SSOP (Unit: mm)
10.05 0.20
10.20 0.30
0.7
0.8
0.36 0.10
0.15 ^{+− 00..105}
0.50 0.20
0 10
ORDERING INFOMATION
Device
SM1350 ×××M
Package
24pin SSOP
NIPPON PRECISION CIRCUITS—1