simple melody generator ft66t - xx fortech electronics component 1 features ? 127 - note rom memory ? 1.3v to 3.3v power supply and low power consumption ? rc oscillator on chip ? one shot or level hold mode ? sound range: 4 octaves, 2 series ? tempo: 16 kinds (presto - largo) ? direct piezo drive functions ? solution of automatic stop or repeat of the melody ? dynamic speaker can be driven with external npn transistor ? two or three times repeat of melody (mask option) ? each note can be individually programmed to be staccato or legato (mask option) ? changing the contents of melody is possible by reprogramming the maskable rom ? power on reset; melody begins from the first note ? start from the head of melody ? bare chip is available description the ft66t is a cmos lsi chip which electronically plays a pre arranged melody. selection of melody start signal is possible by mask option: orders specification suffix "l" indicate level hold mode, and suffix "s" indicate one s hot mode. the universal version (as one shot or level hold mode) is possible also (suffix "u"). absolute maximum ratings (ta = 25 o c) characteristic symbol value unit dc supply voltage v cc C v ss - 0.3 ~ 3.5 v input voltage v in v ss C 0.3 ~ v cc C 0.3 v operating temperature t opr - 20 ~ +65 o c storage temperature t stg - 55 ~ +125 o c el ectrical characteristics (t a = 25 o c, v cc = 1.5v ; unless otherwise specified) characteristic symbol test condition min typ max unit operating voltage v cc 1.3 1.5 3.3 v supply current stand - by i s 0.1 1 ? a operating i cc output open 60 output drive current i oh v cc =1.3v, v o =0.8v 0.6 1.5 ma output sink current i ol v cc =1.3v, v o =0.5v 0.6 1.5 ma frequency stability ? f/f f osc (1.6v) - f osc (1.3v) 12 % f osc (1.3v) free datasheet http:///
simple melody generator ft66t - xx fortech electronics component 2 to - 92 one shot or lavel hold mode can be programmed by mask option one shot ft66t - xxs level hold ft66t - xxl pin configuration ft66t vss vcc out 1.5 or 3.0v - + - + v ss v dd piezo 1.5 or 3.0v - + - + v ss v dd piezo free datasheet http:///
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