M3481

M348x Series UM348x Multi-Instrument Melody Generator _____________________________________________________________________________ Features • Powered by a 1.5V battery • Low standby current • 512-note memory, up to 16 songs • 8 playing modes by user setting • One built-in RC oscillator • 8 beats selectable • 3 timbres - piano, organ, and mandolin • 5 tempos available through mask setting • 14 tones selectable • On-chip envelope modulator and pre-amplifier General Description The M3481 series is a mask-ROM-programmed multi-instrument melody generator , implemented by CMOS technology. It is designed to play the melody according to the previously programmed information and is capable of generating 16 songs with 3 instrument effects : piano, organ and mandolin. The device also includes a pre-amplifier which provides a simple interface to the driver circuit. The M3481 series is intended for applications such as toys, door bells, music box, melody clock/timers and telephones. Absolute Maximum Ratings DC Supply Voltage .......................................... -0.3V to +5.0V Input Voltage Range ....................................... Vss-0.3V to Vdd+0.3V Operating Ambient Temperature .................... 0°C to +70°C Storage Temperature ....................................... -10°C to +125°C Electrical Characteristics (Vss=0V, Vdd=1.5V, Ta=25°C, unless otherwise specified.) Parameter Symbol Min. Typ. Operating Voltage Vdd 1.3V 1.5V Stand-by Current Isb Input Voltage High Vih Vdd-0.3V Input Voltage Low Vil Vss Input Current High Iih 1.5µA 3µA Input Current Low Iil ENV Pin Drive Current Ienv 500µA Output Current (OP1) Iol 200µA Output Current (OP2) Ioh 200µA Max. 5V 12µA Vdd Vss+0.3V 6µA 0.1µA 1200µA 1200µA Conditions No load Vih=Vdd Vil =Vss Venv=0.8V Vol=0.8V Voh=0.7V Playing modes Program Mode CE SL LP AS 0 0 X X X Standby 1 1 0 0 0 First melody→...→Last melody→Stop 2 0 0 1 ↑ First melody→...→Last melody→Repeat from first melody 3 0 1 0 ↑ Start from the present melody→Stop 4 1 0 1 1 Repeat the present melody 5 1 0 0 ↑ Change to the next melody→...→Last melody→Stop 6 1 0 1 ↑ Next melody→...→Last melody→Repeat from first melody 7 1 1 0 ↑ Change to the next melody→Stop 8 1 1 1 ↑ Change to the next melody→Repeat the same melody ( ↑ means a low to high voltage level transaction ) 1 Song Series List (Fewer songs version provides longer duration for each song) M3481 (8 songs) Jingle Bells Santa Claus Is Coming To Town Silent Night, Holy Night Joy To The World Rudolph, The Red-nosed Reindeer We Wish You A Merry Christmas O Come, All Ye Faithful Hark, The Herald Angels Sing M3482 (12 songs) American Patrol Rabbits Oh My Darling, Clementine Butterfly London Bridge Is Falling Down Row, Row, Row Your Boat Are You Sleeping Happy Birthday Joy Symphony Home Sweet Home Weigenlied Melody On Purple Bamboo M3485 (5 songs) The Hawaiian Wedding Song Try To Remember Aloha OE Love Story Yesterday Pin Configuration Pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol TSP CE LP SL AS NC ENV Vss MTO OP1 OP2 MT1 NC OSC2 OSC1 Vdd Description Output flag signal of melody auto stop : In normal operation, this should be open. Chip is enabled if connected to Vdd. Chip is disabled if connected to Vss. Only one song plays if connected to Vdd. All songs play if connected to Vss. A positive going edge will change to play the next song. The melody will repeat if connected to Vdd and will stop automatically if to Vss. No connection Envelope circuit terminal Negative power supply Modulated tone signal output Pre-amplifier output 1 Pre-amplifier output 2 Modulated tone signal input to the pre-amplifier. No connection External oscillator terminal 1 External oscillator terminal 2 Positive power supply 2 Typical Application Circuit A. MELODY DOOR BELL B. LOW COST APPLICATIONS USING SPEAKER (1) One-shot (2) Level-hold 3 C. LOW COST APPLICATIONS USING PIEZO BUZZER (1) One-shot (2) Level-hold The inductor in parallel can be replaced by a 100kΩ resistor but the sound level will be lower. REV.4-98 ( 4 pages ) 4