SM1350AAQM
High Tone Quality Melody IC
OVERVIEW
The SM1350AAQM is single-chip high tone quality melody IC, fabricated using NPC’s Molybdenum-gate CMOS
process. Melodies are selected in serial or binary (parallel) mode, 6 programmable melodies are stored, and the high
tone quality melody is output by how to specify the user. It is making this IC ideal for mechanical clocks and similar
applications where high tone quality output is demanded.
FEATURES
■
Basic Functions
• 4.0MHz oscillator frequency
• Power-save function
- Oscillator stopped when no output
- S0 to S3, MODE, LH pull-up resistors open
• A-class output
• Chattering prevention circuit (STN, STOP, S0 to S3)
• 10-bit D/A converter current-summing
■
Sound Generator Functions
• DWS (dual wave synthesis) sound generators
• 4 simultaneous sounds for 4 tones
■
Melody Functions
• 6 programmable melodies
• Level hold/one-shot melody modes
• Serial/binary (parallel) select modes
■
Control Signal Outputs
• BUSYN signal : LOW during melody output
• CT signal : pulse output synchronizing with selected
notes or rests
■
2.4 to 5.5V supply voltage
■
Molybdenum-gate CMOS
■
Package : 24-pin SSOP
PINOUT
(Top view)
VDD
S0
S1
S2
S3
MODE
LH
STOP
STN
BUSYN
CT
ICN
1
24
XT
XTN
TO
T3N
T2N
T1N
ENDN
EBUSYIN
SP
SPN
12
13
VOL
VSS
PACKAGE DIMENSIONS
(Unit : mm)
ORDERING INFOMATION
Device
SM1350AAQM
Package
24 pin SSOP
SEIKO NPC CORPORATION - 1
NPC [ NIPPON PRECISION CIRCUITS INC ]
