SM1155 series Melody LSIs OVERVIEW The SM1155 series are CMOS melody LSIs that, together with a battery and piezoelectric buzzer. They also feature an oscillator stop function in non-play mode and a variable pull-down resistance function that responds to input levels in order to reduce power consumption, reduce cost, and extend battery life, making them ideal in a wide range of applications including the hold sound for telephones and toys. FEATURES ■ ■ ■ ■ ■ (Top view) ORDERING INFORMATION SM1155×××1S 8-pin SOP 8 TC T1 2 7 VDD TG 3 6 OUT VSS 4 5 OUT PACKAGE DIMENSIONS (Unit: mm) + 0.15 − 0.1 0.05 4.4 ± 0.2 Package 1 0.695typ 5.2 ± 0.3 1.5 ± 0.1 Device T2 0.4 ± 0.2 ■ ■ PINOUT 6.2 ± 0.3 ■ Requires few external components 1.2 to 3.6V wide operating voltage range Low power consumption Melody modes: Level hold 1 Oscillator stop function in non-play mode Power saving pull-down resistor built-in RC oscillator circuit Power-ON initialization function Wide pitch dynamic range (G3 to D7) 8-pin SOP package 0.05 ± 0.05 ■ ■ 1.27 0 to 10 0.10 0.4 ± 0.1 0.12 M SEIKO NPC CORPORATION —1 SM1155 series PAD DESCRIPTION Number Name 1 T2 2 T1 3 I/O Function – Test pins (must be open) TG Ip1 Melody mode control input H: Play L/ Open: Non-play 4 VSS – Ground 5 OUT O 6 OUT Piezoelectric speaker driver outputs. Both pins are LOW in non-play mode. OUT is LOW and OUT is HIGH during output for a musical rest note. Both pins are HIGH during the gap between musical notes. 7 VDD – Supply. The rear surface of the chip is VDD level. 8 TC – Test pins (must be open) 1. Built-in pull-down resistor (the resistance of the pull-down resistor varies with the applied voltage, as described in the Electrical Characteristics). SEIKO NPC CORPORATION —2 SM1155 series SPECIFICATIONS Absolute Maximum Ratings Parameter Symbol Rating Unit VDD − VSS −0.3 to 5.0 V Input voltage range VIN VSS − 0.2 to VDD + 0.2 V Operating temperature range Topr −20 to 80 °C Storage temperature range Tstg −55 to 125 °C Supply voltage range Condition Electrical Characteristics Ta = 25°C, VSS = 0V, VDD = 1.5V Rating Parameter Symbol Condition Unit min typ max 1.2 1.5 3.6 V Operating voltage VDD Current consumption1 IDD1 Non-play mode – 0.01 0.3 µA Current consumption2 IDD2 Melody modes: OUT, OUT open – 25 50 µA TG LOW-level input voltage VIL – – VSS + 0.2 V TG HIGH-level input voltage VIH VDD – 0.2 – – V TG LOW-level input current IIL VIL = 0.4V 1.4 3.0 6.0 µA TG HIGH-level input current IIH VIH = 1.5V 1.4 3.0 6.0 µA OUT, OUT LOW-level output current IOL VOL = 0.75V 2.0 – – mA OUT, OUT HIGH-level output current IOH VOH = 0.75V 2.0 – – mA Internal oscillator frequency fOSC f0 = 50kHz –20 – +20 % 1. Measurement circuit A VDD 1.5V VSS 2. Measurement circuit A 1.5V VDD TG VSS SEIKO NPC CORPORATION —3 SM1155 series FUNCTIONAL DESCRIPTION Melody Modes When TG goes HIGH (VDD), melody play starts. Level hold 1 When TG goes HIGH, melody play starts and continues while TG is held HIGH. When TG goes open circuit or LOW, melody play stops, even if during mid melody. TG OUT 1 TUNE REPEAT REPEAT Oscillator Pull-down resistance 135kΩ (2-pin parallel resistance) 500kΩ 135kΩ Power-save Function As shown in the preceding timing diagrams, the oscillator stops during non-play mode and the pull-down resistance value changes in response to both HIGH-level and LOW-level inputs (power-save pull-down resistor) to reduce power consumption and extend battery life. Non-play oscillator stop function When melody play ends, regardless of the state of TG, the internal oscillator stops and is placed in a standby state. In this state, the current consumption, including input pin pull-down resistor current (IIH max), does not exceed 3.3µA. Power-save pull-down resistor The resistance of the TG input pull-down resistor changes in response to the input voltage. The pull-down resistance is 500kΩ when the input is HIGH, and the pull-down resistance is 135kΩ when the input is LOW. Furthermore, if a light-dependent resistor (CdS) cell is employed as a switch (the pull-down resistance is maximum when the CdS resistance is minimum (light) and the pull-down resistance is minimum when the CdS resistance is maximum (dark)), the combined resistance can be increased, decreasing current consumption. SEIKO NPC CORPORATION —4 SM1155 series TYPICAL APPLICATION The circuits below represent the standard connections for SM1155 series devices. Piezoelectric buzzer VDD OUT Piezoelectric buzzer OUT Light TG VSS VDD OUT OUT TG Circuit 1 VSS Circuit 3 Piezoelectric buzzer VDD OUT OUT TG VSS Circuit 2 SEIKO NPC CORPORATION —5 SM1155 series SONG LIST For products intended solely for sale within Japan, please contact our company about copyright permission. For products intended for sale outside of Japan, it is the responsibility of the customer to obtain permission to use a melody by following all relevant copyright rules and regulations for the countries concerned. Device Song Title Version Composer Time [s] SM1155 It’s a small world AAA Sherman Richard M/Sherman Robert B 45.97 SM1155 Twinkle Twinkle Little Star AAM1 – 25.86 SM1155 Bolero AAN1 Ravel Maurice Joseph 19.83 SM1155 Baroque Hoedown AAP1 Kingsley Gershon/Perrey Jean Jacques 20.69 SM1155 Mickey Mouse March AAQ1 Dodd Jimmie 31.03 1. The sample of this version is available anytime. Note. The copyrights of music described in this list have been the public domain or being managed by JASRAC in Japan. SEIKO NPC CORPORATION —6 @ SM1155 series Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from SEIKO NPC CORPORATION (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SEIKO NPC CORPORATION 1-9-9, Hatchobori, Chuo-ku, Tokyo 104-0032, Japan Telephone: +81-3-5541-6501 Facsimile: +81-3-5541-6510 http://www.npc.co.jp/ Email: [email protected] ND13011-E-00 2013.03 SEIKO NPC CORPORATION —7