SM1125

SM1125 series NIPPON PRECISION CIRCUITS INC. Multimelody IC for Pagers OVERVIEW The SM1125 series are melody ICs fabricated in NPC’s Molybdenum-gate CMOS for use in mobile telecommunications equipment. A maximum of 16 melodies can be stored in programmable ROM. PINOUT (Top View) 8-pin VSOP OSC SI SC ST 1 2 3 4 8 7 VSS VDD MTO TEST FEATURES s 1125×× 6 5 s s s s s s s Maximum of 16 melody selections (with up to 512 steps) Level hold playback mode External reference clock input versions and builtin RC oscillator versions available, set by masterslice option (RC oscillator versions require an external resistor and capacitor). 12 selectable clock frequencies (fixed for all melodies) External clock input versions (12 frequencies) - 32.768 kHz system: 32.768, 65.536 and 131.072 kHz - 37.5 kHz system: 37.5, 75.0 and 150.0 kHz - 38.4 kHz system: 38.4, 76.8 and 153.6 kHz - 48.0 kHz system: 48.0, 96.0 and 192.0 kHz Built-in oscillator versions (4 frequencies) - 38.4 kHz (standard oscillator frequency) - 32.768 kHz - 37.5 kHz - 48.0 kHz 2-pin serial data melody selection and 1-pin melody playback control Power save function External clock input versions Clock gating in no-play modes Built-in RC oscillator versions Oscillator stopped in no-play modes 8-pin plastic VSOP package Molybdenum-gate CMOS process PACKAGE DIMENSIONS Unit: mm 4.4 0.2 6.4 0.3 0.575 TYP 3.1 0.3 1.15 0.05 0.15− 0.05 + 0.1 0.10 0.22 0.1 0.1 0.05 0.65 + 0.12 M ORDERING INFORMATION DEVICE SM...