NPC Manuals

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.

The SM1125 series is a multi-melody IC fabricated in NPC’s Molybdenum-gate CMOS process for use in mobile telecommunications equipment. A maximum of 16 melodies can be stored in programmable ROM. The series supports external reference clock input versions and built-in RC oscillator versions, which are set by master-slice option (RC oscillator versions require an external resistor and capacitor). The series supports 12 selectable clock frequencies (fixed for all melodies): external clock input versions support 32.768 kHz, 37.5 kHz, 38.4 kHz and 48.0 kHz systems; built-in oscillator versions support 38.4 kHz, 32.768 kHz, 37.5 kHz and 48.0 kHz. The series supports 2-pin serial data melody selection and 1-pin melody playback control. The series has a power save function, external clock input versions clock gate in no-play modes, built-in RC oscillator versions oscillator stopped in no-play modes. The series uses an 8-pin plastic VSOP package and Molybdenum-gate CMOS process.

The SM1124 Series are melody pager multi-melody ICs fabricated in NPC's Molybdenum-gate CMOS. A maximum of 16 tunes can be stored in programmable ROM, and the Molybdenum-gate CMOS process realizes small-sized packages and low power dissipation.

This document introduces NEC's SEFUSE (SM/G series) thermal cutoff, which is a small, solid, and reliable fuse that can be used under 0.5 A / 250 Vac. Recently added 3 and 5 ampere / 50 Vdc models are also available. It protects home appliances and industrial equipment from fire and accidents by opening the electrical circuit if it detects abnormal temperature rise.

The SM5021 series are crystal oscillator module ICs fabricated in NPC’s Molybdenum-gate CMOS, that incorporate high-frequency, low current consump- tion oscillator and output buffer circuits. Highly accurate thin-film feedback resistors and high-fre- quency capacitors are built-in, eliminating the need for external components to make a stable 3rd-har- monic oscillator.

The SM5002L series is a crystal oscillator module IC manufactured by NIPPON PRECISION CIRCUITS INC. It features low-voltage and low-current consumption oscillator circuits and output buffers. It incorporates built-in oscillation capacitance with superior frequency response to achieve stable 3rd overtone oscillation without any external components.

The SM5009 series is a low crystal current crystal oscillator module IC from Nippon Precision Circuits Inc. It has excellent frequency response and built-in feedback resistors. Just connect the crystal to achieve stable 40MHz fundamental oscillation.

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.

The SM5007 series are low-current crystal oscillator module ICs that feature highly accurate thin-film feedback resistors and high-frequency capacitors built-in, eliminating the need for external components to make a stable fundamental-harmonic oscillator.