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PT2256V-SL Datasheet(PDF) 10 Page - Princeton Technology Corp

Part # PT2256V-SL
Description  Electronic Volume Controller IC
Download  19 Pages
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Manufacturer  PTC [Princeton Technology Corp]
Direct Link  http://www.princeton.com.tw
Logo PTC - Princeton Technology Corp

PT2256V-SL Datasheet(HTML) 10 Page - Princeton Technology Corp

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Tel:886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
PT2256V V1.2
- 10 -
August, 2006
Electronic Volume Controller IC
PT2256V
APPLICATION CIRCUIT
SINGLE POWER SUPPLY (NO LOUDNESS AND NO BACKUP CIRCUIT)
L-Ch Output
R-Ch Output
R-Ch Input
L-Ch Input
Rx
Cx
VSS
OUT1
IN1
LT1
AGND
/UP
/DN
OSC
VDD
OUT2
IN2
LT3
AGND
DCO
/INH
/RST
PT2256V
100K
3.9K
3.9K
10 F
µ
10 F
µ
UP Key
Down Key
0.1 F
µ
10 F
µ
10 F
µ
0.1 F
µ
10K
10K
100 F
µ
VDD (4.5 to 11V)
+
+
+
+
+
+
Notes:
1. Modifying the values of Rx and Cx affects the Oscillator Frequency of the IC. If the Fosc value is big,
then the volume control change is fast. Likewise, if the Fosc value is small, the volume control
change is slow. It is suggested that Rx= 33K, Cx=2.2µF.
2. The table for the Rx, Cx and Fosc values are given below:
Rx
Cx
Fosc
Rx
Cx
Fosc
33K
1.0µF
34.1Hz
33K
1.0µF
34.1Hz
33K
2.2µF
17.8Hz
51K
1.0µF
22.7Hz
33K
10µF
3.4Hz
100K
1.0µF
11.8Hz


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