SM1125_06 Datasheet, PDF (1/13 Pages) Nippon Precision Circuits Inc – Multimelody IC for Pagers

SM1125 series
Multimelody IC for Pagers
OVERVIEW
The SM1125 series are melody ICs fabricated in NPC’s Molybdenum-gate CMOS for use in mobile telecom-
munications equipment. A maximum of 16 melodies can be stored in programmable ROM.
FEATURES
I Maximum of 16 melody selections (with up to 512
steps)
I Level hold playback mode
I 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).
I 12 selectable clock frequencies (fixed for all melo-
dies)
• External clock input versions (12 frequencies)
- 32.768kHz system: 32.768, 65.536 and
131.072kHz
- 37.5kHz system: 37.5, 75.0 and 150.0kHz
- 38.4kHz system: 38.4, 76.8 and 153.6kHz
- 48.0kHz system: 48.0, 96.0 and 192.0kHz
• Built-in oscillator versions (4 frequencies)
- 38.4kHz (standard oscillator frequency)
- 32.768kHz
- 37.5kHz
- 48.0kHz
I 2-pin serial data melody selection and 1-pin mel-
ody playback control
I Power save function
• External clock input versions
Clock gating in no-play modes
• Built-in RC oscillator versions
Oscillator stopped in no-play modes
I Molybdenum-gate CMOS process
I 8-pin plastic VSOP package
PINOUT
(Top view)
OSC
1
SI
2
SC
3
ST
4
8
VSS
7
VDD
6
MTO
5
TEST
PACKAGE DIMENSIONS
(Unit: mm)
0.575 TYP
3.1 ± 0.3
+ 0.1
0.15 _{− 0.05}
0.65
0.10
0.22 ± 0.1
+ 0.12 M
ORDERING INFORMATION
Device
SM1125××V
Package
8pin VSOP
SEIKO NPC CORPORATION —1