SM1126 Datasheet, PDF (1/18 Pages) Nippon Precision Circuits Inc – Melody IC with Built-in SRAM

NIPPON PRECISION CIRCUITS INC.
SM1126 Series
Melody IC with Built-in SRAM
OVERVIEW
The SM1126 Series are melody ICs for use in mobile
telecommunications equipment. A maximum of 15
melodies can be stored in programmable ROM and
one in built-in read/write SRAM.
PINOUT
(Top View)
8-pin VSOP
FEATURES
s 2.0 to 3.6 V supply voltage
s Maximum of 16 melody selections (15 in ROM +
1 in SRAM)
s Level hold playback mode
s External reference clock input versions and built-
in RC oscillator versions available, set by master-
slice option (RC oscillator versions require an
external resistor and capacitor).
s Selectable clock frequencies (fixed for all melo-
dies)
• External clock input versions (6 frequencies)
- 32.768 kHz system: 32.768, 65.536 and
131.072 kHz
- 38.4 kHz system: 38.4, 76.8 and 153.6 kHz
• Built-in RC oscillator versions (1 frequency)
- 131.072 kHz
s 2-pin serial data melody selection and 1-pin mel-
ody playback control
s Parity check function
s Delivery pattern alarm
s Power save function
• External clock input versions
Clock gating in non-play modes
• Built-in RC oscillator versions
Oscillator stopped in non-play modes
OSC
1
8
VSS
SIO
2
7
VDD
SC
3 _1126×× 6
MTO
ST
4
5
TEST
PACKAGE DIMENSIONS
(Unit: mm)
0.575 TYP
3.1 0.3
+
0.15−
0.1
0.05
ORDERING INFORMATION
Device
SM1126××V
Package
8-pin VSOP
0.65
0.10
0.22 0.1
+ ^0.12 M
NIPPON PRECISION CIRCUITS—1