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PT2389 v1.3 - 1 - September, 2004
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
z CMOS Technology
z Low Total Harmonic Distortion and High S/N Ratio: THD + N < 0.01%, S/N > 95 dB
z LED Display Output Mode
z Least External Components
z 5 Sound Selections Provided: Flat/Normal, Classic, Rock, Pops, and Jazz
z Bass Booster Function & 3D Effect Provided
z 2-Channel Output
z Wide Operating Voltage Range: 5 ~ 9 V
z Direct or Cyclic Key Selection is Provided
z Available in 24 Pins, DIP, SOP, SSOP
APPLICATIONS
z Walkman
z Car Audio
z Mini Compo
z Multimedia Audio Components
z MPEG Card
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PT2389 v1.3 - 2 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
BLOCK DIAGRAM
PIN CONFIGURATION
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PT2389 v1.3 - 3 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
PIN DESCRIPTION
Pin Name I/O Description Pin No.
INL Ｉ Left Channel Input 1
BL1 — Left Bass Control Pin 1
A capacitor is connected between this pin and BL2 2
BL2 — Left Bass Control Pin 2
A capacitor is connected between this pin and BL1 3
TL — Left Treble Control Pin
A capacitor is connected between this pin and OUTL 4
OUTL O Left Channel Output Pin 5
VCC — Positive Supply Voltage 6
Bias — A capacitor is connected between this pin and GND 7
GND — Ground 8
SEL Ｉ Select Control Pin 9
Mute －
Mute pin
The Mute pin can eliminate the noise when mode charging occurs.
A capacitor is connected between this pin and GND
10
Cyc I Cyclic Select Pin 11
BB Ｉ Bass Booster Control Input Pin 12
3D I/O 3D Effect Control Input Pin/Output LED Pin 13
BLED O Bass Booster Display Pin 14
Flat I/O Flat Mode Display & Control Input Pin 15
Rock I/O Rock Mode Display & Control Input Pin 16
Pops I/O Pops Mode Display & Control Input Pin 17
Classic I/O Classic Mode Display & Control Input Pin 18
Jazz I/O Jazz Mode Display & Control Input Pin 19
OUTR O Right Channel Output Pin 20
TR － Right Treble Control Pin
A capacitor is connected between this pin and OUTR 21
BR2 － Right Bass Control Pin 2
A capacitor is connected between this pin and BR1 22
BR1 － Right Bass Control Pin 1
A capacitor is connected between this pin and BR2 23
INR I Right Channel Input Pin 24
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PT2389 v1.3 - 4 - September, 2004
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 Description
Direct Low
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
Power
On
Flat
Mode
Rock
Mode
Pops
Mode
BB Key, 3D Key Control
Bass Booster, 3D Effect
On or Off
Jazz
Mode
Classic
Mode
Press Cyc Press Cyc
Press Cyc
Press Cyc Press Cyc
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)
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PT2389 v1.3 - 5 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
DIRECT KEY SELECTION MODE
Power
On
Flat
Mode
Rock
Mode
Pops
Mode
Classic
Mode
Jazz
Mode
Bass Booster
3D Effect Control
After power on, PT2389 is Flat Mode, under this mode, you can directly select the sound selection you
like. The Bass Booster Function and 3D Effect can switch On or Off in any mode.
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PT2389 v1.3 - 6 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
FREQUENCY RESPONSE
The following figures illustrate the various frequency responses under the various sound selections.
Note:
Flat Mode Flat+3D Flat+BB Flat+3D+BB
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PT2389 v1.3 - 7 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
Note:
Rock Mode Rock+3D Rock+BB Rock+3D+BB
Note:
Pops Mode Pops+3D Pops+BB Pops+3D+BB
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PT2389 v1.3 - 8 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
Note:
Classic Mode Classic+3D Classic+BB Classic+3D+BB
Note:
Jazz Mode Jazz+3D Jazz+BB Jazz+3D+BB
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PT2389 v1.3 - 9 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
Different sound selections exhibit different frequency gains and different frequency levels. Please refer
to the table below.
Typ.
Mode f=80Hz f=1KHz f=10KHz Unit
Flat 3 3 3
Rock 14 6.5 12.5
Pops 8 6 12.5
Classic 8.5 7 7.5
Jazz 14.5 7.5 10.5
Flat+Bass Booster 10 5 4
Rock+Bass Booster 18.5 7 12.5
Pops+Bass Booster 12.5 6.5 12.5
Classic+Bass Booster 13 7 8
Jazz+Bass Booster 18.5 7.5 10.5
Flat+3D 7 7 7
Rock+3D 18 10 16
Pops+3D 11.5 9.5 16
Classic+3D 12 9.5 11
Jazz+3D 18 10.5 14
Flat+BB+3D 14 8.5 7.5
Rock+ BB+3D 22.5 10.5 16.5
Pops+ BB+3D 16.5 10 16
Classic+ BB+3D 16.5 10.5 11
Jazz+ BB+3D 22.5 11 14
dB
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PT2389 v1.3 - 10 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
TREBLE AND BASS ADJUSTMENT
It is general knowledge that different individuals have different listening preferences. The application
circuit of PT2389 included in this specification has been designed for the taste general listening public;
however, you can make the necessary adjustment to suit your personal taste. Please refer to the
sections below.
TREBLE ADJUSTMENT
The Treble adjustment is made by changing the value of the 2 capacitors connected between
TL -- OUTL pins and TR -- OUTR pins. Please refer to the diagram below.
As the capacitor value becomes bigger, the treble of the gain frequency curve is shifted down.
Likewise, as the capacitor value becomes smaller, the treble gain frequency curve shifts the opposite
direction. Referring to the diagram above, we see that at 8dB, different capacitor values exhibit
different frequency responses. Capacitor value 1800 pF has a lower frequency gain response than
1200 pF capacitor.
Hz
TL – OUTL Capacitors vs. Frequency Response
Note:
1200pF 1500pF 1800pF
1800pF
1500pF
1200pF
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PT2389 v1.3 - 11 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
BASS ADJUSTMENT
Bass adjustments can be made by changing the values of the capacitors connected between BL1
-- BL2 pins, and BR1 -- BR2 pins. The larger the capacitor value used, the frequency response
curve shifts down. Likewise, the smaller the capacitor value, the frequency response curve shifts
the opposite direction. Please refer to the diagram below.
HZ
BL1 - BL2 Capacitor vs. Frequency Response Curve
Note:
0.1μF 0.068μF 0.056μF
0.056uF
0.068uF
0.1uF
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PT2389 v1.3 - 12 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Ratings Unit
Supply Voltage Vcc 12 V
Operating Temperature Topr -40 ～ +85 ℃
Storage Temperature Tstg -65 ～ +150 ℃
Input Voltage Vi -0.3～Vcc+0.3 V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Vcc=9V，Vi=1Vrms，f=1KHz，Temp=27℃
Parameter Symbol Conditions Min. Typ. Max. Unit
Operating Voltage Vcc - 5 9 10 V
Operating Current Icc Vcc=9V, Vi=0V Flat Mode 20 mA
Max. Output Voltage VOM Vcc=9V 2.5 Vrms
Output Noise VNO
Vcc=9V, Vi=0V
BW=20∼20KHz
A-Weighting
-90 -98 dB
Total Harmonic Distortion THD Vcc=9V, Vi=0.2Vrms
BW=20∼20KHz 0.01 %
Input Impedance RIN Vcc=9V 70 100 140 KΩ
Output Impedance ROUT Vcc=9V 40 80 Ω
High Level Input Voltage VIH Vcc=9V 0.7Vcc V
Low Level Input Voltage VIL Vcc=9V 0.3Vcc V
Max. Input Voltage VIMAX Vcc=9V,
Flat Mode、BB & 3D off 2.0 Vrms
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PT2389 v1.3 - 13 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
APPLICATION CIRCUIT
DIRECT KEY MODE
Note: Please use 1500pF、0.068µF Mylar Capacitor
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PT2389 v1.3 - 14 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
CYCLIC KEY MODE
Note: Please use 1500pF、0.068µF Mylar Capacitor
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PT2389 v1.3 - 15 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
ORDER INFORMATION
Valid Part Number Package Type Top Code
PT2389 24 Pins, DIP, 300 mil PT2389
PT2389-S 24 Pins, SOP, 300 mil PT2389-S
PT2389-SN 24 Pins, SSOP, 150 mil PT2389-SN
PT2389 (L) 24 Pins, DIP, 300 mil PT2389
PT2389-S (L) 24 Pins, SOP, 300 mil PT2389-S
PT2389-SN (L) 24 Pins, SSOP, 150 mil PT2389-SN
Notes:
1. (L) = Lead Free
2. The Lead Free mark is put in front of the date code.
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PT2389 v1.3 - 16 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
PACKAGE INFORMATION
24 PINS, DIP (300 MIL)
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PT2389 v1.3 - 17 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
Symbols Min. Nom. Max.
A 0.210
A1 0.015
A2 0.115 0.130 0.195
b 0.014 0.018 0.022
b1 0.014 0.018 0.020
b2 0.045 0.060 0.070
b3 0.030 0.039 0.045
c 0.008 0.010 0.014
c1 0.008 0.010 0.011
D 1.160 1.185 1.195
D1 0.005
E 0.300 0.310 0.325
E1 0.240 0.250 0.280
e 0.100 bsc.
eA 0.300 bsc.
eB 0.430
eC 0.000 0.060
L 0.115 0.130 0.150
Notes:
1. All dimensions are in INCHES.
2. Dimensioning and tolerancing per ANSI Y 14.5-1982.
3. Dimension “A”, “A1” and “L” are measured with the package seated in JEDEC Seating
Plane Gauge GS-3.
4. “D”, “D1” and “E1” dimensions do not include mold flash or protrusions. Mold flash or
protrusions shall not exceed 0.010 inch.
5. “E” and “eA” measured with the leads constrained to be perpendicular to datum -c- .
6. “eB” and “eC” are measured at the lead tips with the leads unconstrained.
7. N is the number of terminal positions. (N=24)
8. Pointed or rounded lead tips are preferred to ease insertion.
9. “b2” and “b3” maximum dimensions are not include dambar protrusions. Dambar
protrusions shall not exceed 0.010 inch (0.25mm)
10. Distance between leads including Dambar protrusions to be 0.005 inch. minimum.
11. Datum plane -H- coincident with the bottom of lead, where lead exits body.
12. Refer to JEDEC MS-001, Variation BE.
JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
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PT2389 v1.3 - 18 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
24 PINS, SOP (300 MIL)
Symbols Min. Nom. Max.
A 2.35 2.65
A1 0.10 0.30
B 0.33 0.51
C 0.23 0.32
D 15.20 15.60
E 7.40 7.60
e 1.27 bsc.
H 10.00 10.65
h 0.25 0.75
L 0.40 1.27
α 0° 8°
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PT2389 v1.3 - 19 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
Notes:
1. Dimensioning and tolerancing per ANSI Y 14.5-1982.
2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold Flash,
protrusion or gate burrs shall not exceed 0.15mm (0.006 in)per side.
3. Dimension “E” does not include interlead flash protrusions. Interlead flash or protrusions shall
not exceed 0.25 mm (0.010 in) per side.
4. The chamfer on the body is optional. It is not present, a visual index feature must be located
within the crosshatched area.
5. “L” is the length of the terminal for soldering to a substrate.
6. “N” is the number of terminal position. (N=24)
7. The lead width “B” as measured 0.36 mm (0.014 in) or greater above the seating plane, shall
not exceed a maximum value of 0.61mm (0.24 in).
8. Controlling dimension: MILLIMETER.
9. Refer to JEDEC MS-013, Variation AD.
JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
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PT2389 v1.3 - 20 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
24 PINS, SSOP (150MIL)
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PT2389 v1.3 - 21 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
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PT2389 v1.3 - 22 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
Symbol Min. Nom. Max.
A 0.053 - 0.069
A1 0.004 - 0.010
A2 0.049 - 0.065
b 0.008 - 0.012
b1 0.008 0.010 0.011
c 0.006 - 0.010
c1 0.006 0.008 0.009
D 0.341 BSC
E 0.236 BSC
E1 0.154 BSC
e 0.025 BAS
L 0.016 - 0.050
L1 0.041 REF
L2 0.010 BAS
R 0.003 - -
R1 0.003 - -
θ 0° - 8°
θ1 5° - 15°
θ2 0° - -
aaa 0.004
bbb 0.008
ccc 0.004
ddd 0.007
eee 0.004
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PT2389 v1.3 - 23 - September, 2004
5-Mode Preset Equalizer IC with Bass Booster & 3D Effect PT2389
Notes:
1. Dimensioning and tolerancing per ANSI Y14.5M-1982.
2. Dimensions in inches (angles in degrees)
3. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or
gate burrs shall not exceed 0.006” per end. Dimension E1 does not include interlead flash or
protrusions. Interlead flash or protrusions shall not exceed “0.006” per side. D1 and E1
dimensions are determined at dutum H.
4. The package top may be smaller than the package bottom. Dimensions D and E1 are determined
at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and
interlead flash, but including any mismatch between the top and bottom of the plastic.
5. Datums A and B to be determined at datum H.
6. N is the maximum number of terminal position. (N=24)
7. The dimensions apply to the flat section of the lead between 0.004 to 0.010 inches from the lead
tip.
8. Dimension b does not include dambar protrusion. Allowable dambar protrusion shall be 0.004”
total in excess of b dimension at maximum material condition. The dambar can not be located on
the lower radius of the foot.
9. Refer to JEDEC MO-137 variation AE.
JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION
