Princeton Technology Corp PT2253B, PT2253B-SN Datasheet
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
Princeton Technology Corp
.
http://www.princeton.com.tw
Electronic Volume Controller IC PT2253B
DESCRIPTION
PT2253B is an electronic volume controller IC utilizing CMOS Technology
specially designed for use on audio equipment. It has tw o (2) built-in channels
making it ideally suitable for mono and stereo sound applications. PT2253B
provides a wide frequency response range and a very low harmonic distortion to
mention a few; thereby guaranteeing a highly effective and reliable performance.
FEATURES
! CMOS Technology
! Low Power Consumption
! Operating Voltage Range : Vcc = 4 ~ 12 V
(Backup Voltage is up to 4 V)
! 0dB to -68dB attenuation controlled by 2dB/step
! 2 Channels in each chip
! Capable to control attenuation by a built-in oscillator and Up/Down Pin
! Single Power Supply or Dual Power Supplies of (+) and (-) can be used
! Wide Frequency Response Range
! Very Low Harmonic Distortion
! Available in 16 pins, DIP or SO Package
APPLICATIONS
! Audio Equipment Volume Control
! Traditional VR Replacement
PT2253B v 1.7 Page 1 Revised October 1999
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
Princeton Technology Corp
.
http://www.princeton.com.tw
Electronic Volume Controller IC PT2253B
PIN CONFIGURATION
PT2253B
L-OUT1
L-IN1
A-GND
L-IN2
L-OUT2
DCO
ORDER INFORMATION
Valid Part Number Package
PT2253B 16 Pins, DIP
PT2253B-SN 16 Pins, SO (150 mil)
Vss
IN H
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Vcc
R-OUT1
R-IN 1
A-GND
R-IN 2
R-OUT2
U/D
OSC
Note: PTC also offers PT2253A for an Operating Voltage Range = 6.0 ~12. 0 V.
PT2253B v 1.7 Page 2 Revised October 1999
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
Princeton Technology Corp
.
http://www.princeton.com.tw
Electronic Volume Controller IC PT2253B
APPLICATION CIRCUIT 1
Dual Power Supply (L-Channel Only)
Vss -6V
4
VDD +6V
10uF
10uF
+
3
LM358
+
_
2
+
1
8
INPUT
GROUND
OUTPUT
10uF
10uF
10K
Vss
+
+
L-OUT1
L-IN1
A-GND
L-IN2
L-OUT2
INH
DCO
PT2253B
Vcc
R-OUT1
R-IN 1
A-GND
R-IN 2
R-OUT2
U/D
OSC
CX
+
4.7
100K
IN4148
+
1uF
RS
UP
SW
33K
RX
IN4148
DOWN
SW
fosc = 1
(0.7)(CX)( RX)
RS 3RX
PT2253B v 1.7 Page 3 Revised October 1999
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