UM3481 BOWIN | Alldatasheet

Document overview

  • Manufacturer or author: pROVIDED bY alldatasheet.com(free datasheet download site)
  • PDF pages: 4

Technical content

Features

  • • •• Powered by a 1.5V battery • 8 beats selectable
  • Low standby current • 3 timbres - piano, organ, and mandolin
  • 512-note memory, up to 16 songs • 5 tempos available through mask setting
  • • •• 8 playing modes by user setting • 14 tones selectable
  • One built-in RC oscillator • On-chip envelope modulator and pre-amplifier General Description The UM3481 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

Electrical Characteristics

(Vss=0V, Vdd=1.5V, Ta=25 °C, unless otherwise specified.) Parameter Symbol Min. Typ. Max. Conditions Operating Voltage Vdd 1.3V 1.5V 5V Stand-by Current Isb - - 12 µ A No load Input Voltage High Vih Vdd-0.3V - Vdd Input Voltage Low Vil Vss - Vss+0.3V Input Current High Iih 1.5 µ A 3 µ A 6 µ A Vih=Vdd Input Current Low Iil - - 0.1 µ A Vil =Vss ENV Pin Drive Current Ienv 500 µ A - - Venv=0.8V Output Current (OP1) Iol 200 µ A - 1200 µ A Vol=0.8V Output Current (OP2) Ioh 200 µ A - 1200 µ A Voh=0.7V Playing modes Mode CE SL LP AS Program 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 )

BOWIN ELECTRONIC COMPANY www.bowin-ic.com.hk 2 Song Series List (Fewer songs version provides longer duration for each song) UM3481 (8 songs) UM3482 (12 songs) UM3485 (5 songs) Jingle Bells American Patrol The Hawaiian Weddi ng Song Santa Claus Is Coming To Town Rabbits Try To Rem ember Silent Night, Holy Night Oh My Darling, Clementine Aloha OE Joy To The World Butterfly Love Story Rudolph, The Red-nosed Reindeer London Bridge Is Falling Down Yesterday We Wish You A Merry Christmas Row, Row, Row Your Bo at O Come, All Ye Faithful Are You Sleeping Hark, The Herald Angels Sing Happy Birthday Joy Symphony Home Sweet Home Weigenlied Melody On Purple Bamboo Pin Configuration Pin Symbol Description 1 TSP Output flag signal of melody auto stop : In n ormal operation, this should be open. 2 CE Chip is enabled if connected to Vdd. Chip is d isabled if connected to Vss. 3 LP Only one song plays if connected to Vdd. All s ongs play if connected to Vss. 4 SL A positive going edge will change to play the next song. 5 AS The melody will repeat if connected to Vdd and wil l stop automatically if to Vss.

6 NC No connection

7 ENV Envelope circuit terminal

8 Vss Negative power supply

9 MTO Modulated tone signal output

10 OP1 Pre-amplifier output 1

11 OP2 Pre-amplifier output 2

12 MT1 Modulated tone signal input to the pre-ampli fier.

13 NC No connection

14 OSC2 External oscillator terminal 1

15 OSC1 External oscillator terminal 2

16 Vdd Positive power supply

BOWIN ELECTRONIC COMPANY www.bowin-ic.com.hk 3 Typical Application Circuit A. MELODY DOOR BELL B. LOW COST APPLICATIONS USING SPEAKER (1) One-shot (2) Level-hold

BOWIN ELECTRONIC COMPANY www.bowin-ic.com.hk 4 C. LOW COST APPLICATIONS USING PIEZO BUZZER (1) One-shot (2) Level-hold The inductor in parallel can be replaced by a 100k Ω resistor but the sound level will be lower. REV.6-03 ( 4 pages )