Paper Piano with Internal Rosc Operating voltage: 2.4V stand-by c

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Paper Piano with Internal Rosc Operating voltage: 2.4V stand-by c

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HT3151A
Paper Piano with Internal Rosc
Operating voltage: 2.4V stand-by current Auto power-off function direct full-scale inputs Directly driving piezo application
on-chip oscillator without external resistor on-chip amplifier Minimal external components required
General Description
HT3151A CMOS designed piano applications. consists inputs, on-chip oscillator, on-chip amplifier, envelope piezo driver circuits. requires only piezo pads normal application. very suitable various applications.
Coordinates
Unit:
Chip size: (mil)2
-31.92 -31.45 -31.45 -29.75 -22.10 -14.45 -6.80 0.85 8.50 16.15 23.80
14.94 -0.83 -8.48 -25.14 -25.14 -25.14 -25.14 -25.14 -25.14 -25.14 -25.14
31.45 31.45 31.45 31.45 31.45 31.45 23.80 16.79 9.99 -11.73 -19.38
-25.14 -8.48 -1.00 6.65 14.30 25.14 25.14 25.35 25.32 25.14 25.14
substrate should connected layout artwork.
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HT3151A
Block Diagram
Description
2~16
Name
TEST2 KEY1~KEY15 TEST1, TEST2
Internal Connection
CMOS CMOS Pull-Low CMOS CMOS CMOS
Description
test only Direct keyboard input pads Power supply (positive) Power supply (ground) test only Piezo driver output Piezo driver output pad, phase
Absolute Maximum Ratings
Supply Voltage .-0.3V 5.5V Input Voltage. VSS-0.3V VDD+0.3V Storage Temperature. 125°C Operating Temperature. 70°C
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HT3151A
Electrical Characteristics
Symbol
ISTB FOSC (Ta=25°C)
Parameter
Operating Voltage Stand-by Current Operating Current BZ1,BZ2 Source Current BZ1, Sink Current Input Voltage Input Voltage Oscillator Frequency
Test Condition
Min.
-0.7 0.7VDD
Typ.
Max.
0.2VDD
Unit
Condition
load VOH=2.7V VOL=0.3V
Timing Diagram
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HT3151A
Application Circuit
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Paper Piano with Internal Rosc Operating voltage: 2.4V stand-by c

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