Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect
PT2389
DESCRIPTION
PT2389 is a 2-channel digital preset equalizer utilizing CMOS Technology. It provides 5 different sound
selections, namely: Flat/Normal, Rock, Pops, Classic and Jazz. Bass Booster and 3D Effects may be
added to any of 5 sound selections, thereby creating more audio versatility. PT2389 provides two types
of key selection mode, namely: the Direct and the Cyclic. Pin assignment and application circuit are
optimized for cost saving advantages and easy PCB layout.
FEATURES
CMOS technology
Low total harmonic distortion and high S/N Ratio: THD + N < 0.01%, S/N > 95dB
LED display output mode
Least external components
5 sound selections provided: Flat/Normal, Classic, Rock, Pops, and Jazz
Bass booster function & 3D effect provided
2-channel output
Wide operating voltage range: 5 ~ 9V
Direct or cyclic key selection is provided
Available in 24 Pins, DIP, SOP, SSOP
APPLICATIONS
Walkman
Car audio
Mini compo
Multimedia audio components
MPEG card
PT2389 V1.5
-1-
July, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect
PT2389
BLOCK DIAGRAM
INL
BL1
BL2
GAIN SELECTOR
3D
SOUND
OUTR
TR
SELECT UNIT
Buffer
Bass
Treble
OUTL
TL
INR
BR1
BR2
VCC
GND
3D
Buffer
Bass
Treble
CONTROL UNIT
Mute
BLED
Pops
Classic
Rock
PT2389 V1.5
-2-
Mute
Jazz
SEL
Flat
Cyc
BB
July, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect
PT2389
PIN CONFIGURATION
INL
BL1
BL2
TL
OUT L
V CC
Bias
GND
S EL
Mute
Cyc
BB
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
INR
BR1
BR2
TR
OUT R
Jazz
Classic
Pops
Rock
F lat
BLED
3D
PT23 89
19
18
17
16
15
14
13
PT2389 V1.5
-3-
July, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect
PT2389
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
PIN DESCRIPTION
Pin Name
INL
BL1
BL2
TL
OUTL
VCC
Bias
GND
SEL
Mute
Cyc
BB
3D
BLED
Flat
Rock
Pops
Classic
Jazz
OUTR
TR
BR2
BR1
INR
I/O
I
-
-
-
O
-
-
-
I
-
I
I
I/O
O
I/O
I/O
I/O
I/O
I/O
O
-
-
-
I
Description
Left Channel Input
Left Bass Control Pin 1
A capacitor is connected between this pin and BL2
Left Bass Control Pin 2
A capacitor is connected between this pin and BL1
Left Treble Control Pin
A capacitor is connected between this pin and OUTL
Left Channel Output Pin
Positive Supply Voltage
A capacitor is connected between this pin and GND
Ground
Select Control Pin
Mute Pin
The Mute pin can eliminate the noise when mode charging occurs.
A capacitor is connected between this pin and GND
Cyclic Select Pin
Bass Booster Control Input Pin
3D Effect Control Input Pin/Output LED Pin
Bass Booster Display Pin
Flat Mode Display & Control Input Pin
Rock Mode Display & Control Input Pin
Pops Mode Display & Control Input Pin
Classic Mode Display & Control Input Pin
Jazz Mode Display & Control Input Pin
Right Channel Output Pin
Right Treble Control Pin
A capacitor is connected between this pin and OUTR
Right Bass Control Pin 2
A capacitor is connected between this pin and BR1
Right Bass Control Pin 1
A capacitor is connected between this pin and BR2
Right Channel Input Pin
PT2389 V1.5
-4-
July, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect
PT2389
FUNCTION DESCRIPTION
PT2389 is a 5-Mode Preset Equalizer IC with a Bass Booster and 3D Effects. It has 2 types of key
selection mode, namely: Direct and Cyclic. The Direct or Cyclic Key Selection Mode is determined by
the SEL Pin. Please refer to the table below:
SEL pin
Direct
Low
Description
Press Flat key
→
Flat mode
Press Rock key
→
Rock mode
Press Pops key
→
Pops mode
Press Classic key
→
Classic mode
Press Jazz key
→
Jazz mode
Cyclic *
Floating/High
* Press Cyc Key
Note:
The Bass Booster Function and the 3D Effect can be controlled in the same manner under the Direct or
the Cyclic Key Selection Mode. To turn the Bass Booster On or Off, press the BB Key. To turn the 3D
Effect On or Off, press the 3D Key.
CYCLIC KEY SELECTION MODE
Press Cyc
Power
On
Flat
Mode
Rock
Mode
Press Cyc
Pops
Mode
Press Cyc
BB Key, 3D Key Control
Bass Booster, 3D Effect
On or Off
Press Cyc
Jazz
Mode
Press Cyc
Classic
Mode
After power on, PT2389 is Flat Mode, under this mode, any of the sound selections (Flat, Rock, Pops,
Classic, Jazz) may be selected by pressing the CYC Key. BB key and 3D key is the switch of Bass
Booster and 3D Effect (Bass Booster and 3D Effect if Off when Power On)
PT2389 V1.5
-5-
July, 2006
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