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3544 Datasheet(PDF) 3 Page - Unisonic Technologies

Part # 3544
Description  HEADPHONE AMPLIFIER FOR CD-ROMS
PDF  9 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

3544 Datasheet(HTML) 3 Page - Unisonic Technologies

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UTC 3544
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO. LTD
3
QW-R107-040,A
PIN DESCRIPTIONS
PIN NO.
PIN NAME
I/O
PIN VOLTAGE
INTERNAL EQUIVALENT CIRCUIT
FUNCTION
1
7
OUT1
OUT2
O
O
2.1V
2.1V
(Vcc=5V)
Vcc
10k
1
7
Output pin
2
MUTE
I
0.1V
(When open)
2
Vcc
190k
Mute control pin
(set to low for
prevention of
popping noise
when power is
turned on and off).
Operating: High
Muting: Low(open)
3
5
IN1
IN2
I
I
2.1V
2.1V
(Vcc=5V)
3
5
Vcc
180k
BIAS
Input pin
6
BIAS
I/O
2.1V
(Vcc=5V)
6
Vcc
60k
60k
BIAS
Bias pin(the
external 47μF
capacitor also
serves as the
anti-pop time
constant,
therefore make the
proper
considerations be
changing it).
4
GND
I
-
5
Vcc
I
-



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