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Silan Semiconductors
5-MODE PRESET EQUALIZER IC
DESCRIPTION
The SC5388 is a 2-channel digital preset equalizer utilizing CMOS technology. It provides 5 different sound selections, namely: Flat/normal, rock, Pops, Classic and Jazz. A Bass Booster may be added any of 5 sound selections, thereby creating more audio versatility. SC5388 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.
SC5388
SDIP-24
FEATURES
* Wide operating voltage range(VCC=5.0V ~ 11.0V) * Low total harmonic distortion and high S/N ratio (THD+N<0.02%, S/N > 95dB) * LED display output mode * Less external parts * 5-sound selections provided * Bass booster function * Direct and cyclic key selection provided * 2-Channel output
SOP-24
ORDERING INFORMATION
SC5388 SC5388S SDIP-24 Package SOP-24 Package
APPLICATIONS
* Walkman * Car Audio * Fader and MPEG Card * Multimedia Audio components
PIN CONFIGURATIONS
INL BL1 BL2 TL OUTL VCC BIAS GND SEL 1 2 3 4 5 6 7 8 9 24 INR 23 BR1 22 BR2 21 TR 20 OUTR
SC5388
19 JAZZ 18 CLASSIC 17 POPS 16 ROCK 15 FLAT 14 BLED 13 N.C.
MUTE 10 CYC 11 BB 12
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
1
Silan Semiconductors
BLOCK DIAGRAM
6 INL 1 BL1 2 BL2 3
Gain Selector Buffer Bass
SC5388
VCC 5 OUTL
Treble
4
TL
20 OUTR INR 24 BR1 23 BR2 22
Control Unit Mute Buffer Bass Treble
21 TR 10 MUTE
GND 8 14 BLED 15 Flat 16 Rock 17 Pops 18 Classic 19 Jazz 11 CYC 9 SEL 12 BB 7
13 N.C.
BIAS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Supply Voltage Input Voltage Power Dissipation Operating Temperature Storage Temperature
Symbol
VCC VIN PD Topr Tstg
Value
11.0 0.3 ~ VCC+0.3V 200 -20 ~ +75 -40+125
Unit
V V mW C C
ELECTRICAL CHARACTERISTICS
(Tamb=25C VCC=9.0V,Vi=1Vrms, f=1kHz, Unless otherwise specified)
Parameter
Operating Supply Voltage Operating Supply Current Maximum Output Voltage Output Noise Total Harmonic Distortion Input impedance Output impedance Maximum Input Voltage
Symbol
VCC ICC VOM VNO THD RIN ROUT VI(max)
Test conditions
Vcc=9v,Vi=0,Flat Mode Vcc=9.0V Vcc=9.0V,Vi=0, BW=400~30kHz , A-weighting Vcc=9.0V,Vi=0.2Vrms, BW=400~30kHz , A-weighting Vcc=9.0V Vcc=9.0V Vcc=9.0V
Min
5.0 3.5
Typ
9.0 11
Max
11.0
Unit
V mA Vrms Vrms % k k Vrms
20 0.02 50 60 5.5 2.0
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
2
Silan Semiconductors
PIN DESCIPTION
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
SC5388
Description
Left Channel Input. Left Bass Control Pin 1. A Capacitor may be Connected between this Pin and BL2 Left Bass Control Pin 2. A Capacitor may be Connected between this Pin and BL1. Left Treble Control Pin . A Capacitor may be Connected between this Pin and OUTL. Left Channel Output in. Positive Supply Voltage. A capacitor may be connected between this Pin and GND. Ground. Select Control Pin. Mute Pin. The Mute Pin can eliminate the noise when mode changing occurs. A capacitor is connected between this Pin and GND. Cyclic Select Pin. Bass Booster Control Input Pin. No Connected. Bass Booster Control Input 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. JASS Mode Display & Control Input Pin. Right Channel Output in. Right Bass Control Pin 1. A Capacitor may be Connected between this Pin and BR2. Right Bass Control Pin 2. A Capacitor may be Connected between this Pin and BR1. Right Treble Control Pin . A Capacitor may be Connected between this Pin and OUTR. Right Channel Input.
Pin Name
INL BL1 BL2 TL OUTL VCC BIAS GND SEL MUTE CYC BB NC BLED FLAT ROCK POPS CLASSIC JASS OUTR BR1 BR2 TR INR
I/O
I ---O ---I -I I -O I/O I/O I/O I/O I/O O ---I
FUNCTIONAL DESCRIPTION
The SC5388 is a 2-channel and 5-Mode digital preset equalizer with a Bass Booster function. It provides two types of key selection mode namely: the Direct and the Cyclic. These two key selection Modes are determined by SEL pin. Please refer to the table below:
Key Selection Mode
SEL Pin
Description
Press FLAT key to activate Flat Mode Press ROCK key to activate Rock Mode Direct Low Press POPS key to activate Pops Mode Press CLASSIC key to activate Classic Mode Press JAZZ key to activate Jazz Mode ...Flat Rock Pops Classic Jazz FlatRock... Cyclic Floating/High Note: 1). The Bass Booster 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. 2). Under the Cyclic Selection mode, press the CYC Key, to go to the next sound selection.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
3
Silan Semiconductors
1. CYCLIC KEY SELECTION MODE
SC5388
As seen in the table above, the cyclic key selection mode is active when the SEL pin is floating or "high". Under this mode, any of the sound selections(Flat, Rock, Pops, classic, Jazz) may be selected by pressing the CYC key. The default value is the Flat Mode. This Means that when power is turned ON, the mode is active. Pressing the Cyclic Key lets you go from one sound selection to the other in the following order: Flat Rock Pops Classic Jazz. That is, press the CYC key to activate the next mode. The BB key controls the Bass Booster. When the power is turned ON, the bass Booster is OFF.
2. DIRECT KEY SELECTION MODE
The direct key selection mode is active when the SEL pin is set to "LOW". As the name implies, you can directly select the sound selection you like simply by pressing the respective keys. This means, that to select the JAZZ mode, press the JAZZ key, CLASSIC Mode ,press the CLASSIC key and so forth. Take note that when the power is turned On, the Flat Mode is active. The Bass Booster is independent of the key/sound mode selected and may be turned ON or OFF at any time.
3. FREQUENCY RESPONSE
The Fig.1 ~ Fig.5 illustrate the various frequency response under the various sound selection(Flat, Rock, Pops, Classic, Jazz, and Bass Booster). Different sound selections exhibit different frequency gains at different frequency levels. Please refer to the table below:
Sound Selection
Flat Rock Pops Classic Jazz Flat + Bass Booster Rock + Bass Booster Pops + Bass Booster Classic + Bass Booster Jazz + Bass Booster
f=80Hz
1.7 10.0 6.5 6.0 10.0 8.5 11.0 9.5 9.5 11.0
Typical f=1kHz
-0.8 1.5 0.5 0.5 1.2 0.7 2.0 1.0 1.0 2.0
f=10kHz
-1.3 7.0 7.0 1.0 3.3 1.0 7.0 7.0 1.0 2.5
Unit
dB
TREBLE AND BASS ADJUSTMENTS
It is general knowledge that different individuals have different listening preference. The application circuit of SC5388 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 Section below.
1. TREBLE ADJUSTMENT
The Treble adjustment is made by changing the value of the 2 capacitors connected between TL-OUTL, TROUTR, Please refer to Fig. 6. As the capacitor value becomes bigger, the treble of the gain frequency curve is shifted down. Likewise, as the capacitor value become smaller, the treble gain frequency curve shifts the opposite direction. Referring to the Fig.6. we see that at 6dB, different capacitor values exhibit different frequency response. Capacitor value 1800pF has a lower frequency gain response than 1200pF capacitor.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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Silan Semiconductors
2. BASS ADJUSTMENT
SC5388
Bass adjustment can be made by changing the values of the capacitor connected between BL1~BL2 and BR1~BR2. Please refer to Fig.7. The larger the capacitor value used, the frequency response curve shifts down. Like wise, the smaller the capacitor value, the frequency response curve shifts the opposite direction. In Fig.7, at 9dB different capacitor value exhibit different frequency responses. A capacitor with a value of 0.1F has smaller frequency response than 0.56F capacitor.
Fig.1 Flat Mode(Flat mode + Bass Booster)
12 10 8
Gain (dB)
6 4
Flat Mode + Bass Booster
2
Flat Mode
0 -2 10 100 1000 10k 100k
Frequency (Hz)
Fig.2 Rock Mode(Rock mode + Bass Booster)
12 10 8
Rock Mode + Bass Booster Rock Mode
Gain (dB)
6 4
2
0 -2 10 100 1000 10k 100k
Frequency (Hz)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
5
Silan Semiconductors
Fig.3 Pops Mode(Pops mode + Bass Booster)
12 10 8
SC5388
Pops Mode + Bass Booster
Gain (dB)
6 4
Pops Mode
2
0 -2 10 100 1000 10k 100k
Frequency (Hz)
Fig.4 Classic mode(Classic mode + Bass Booster)
12 10 8
Classic Mode + Bass Booster
Gain (dB)
6 4
2
Classic Mode
0 -2 10 100 1000 10k 100k
Frequency (Hz)
Fig.5 Jazz Mode(Jazz mode + Bass Booster)
12 10 8
Jazz Mode + Bass Booster Jazz Mode
Gain (dB)
6 4
2
0 -2 10 100 1000 10k 100k
Frequency (Hz)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
6
Silan Semiconductors
Fig.6 TL-OUTL Capacitors vs. Frequency Response
12 10
SC5388
1800pF
8
Gain (dB)
1500pF
6 4
2
0 -2 10 100
1200pF
1000
10k
100k
Frequency (Hz)
Fig.7 BL1-BL2 Capacitors vs. Frequency Response
12 10
0.56F
8
0.68F
Gain (dB)
6 4
2
0.1F
0 -2 10 100 1000 10k 100k
Frequency (Hz)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
7
Silan Semiconductors
APPLICATION CIRCUIT
DIRECT KEY MODE
IN L
1F 1F
SC5388
IN R
1 INL 2 BL1
0.066F
INR BR1 BR2 TR OUTR JAZZ CLASSIC POPS ROCK FLAT BLED N.C.
24 23
0.066F
3 BL2
5.6k 1500pF
22
1500pF
VCC
5.6k 4.7k
4 TL
1500pF
21
1500pF
OUT L VCC
1F
OUT R
5 OUTL
10k
20
1F
6 VCC 7 BIAS
19 18 17 16 15 14 13
LED x 6
10k Jazz Classic Pops Rock Flat
100F
0.1F
0.1F
47F
8 GND 9 SEL
0.1F
10 MUTE 11 CYC
BB
12 BB
SC5388
Note: Please use 0.068F, 1500pF Mylar Capacitors.
CYCLIC KEY MODE
IN L
1F 1F
IN R
1 INL 2 BL1
0.066F
INR BR1 BR2 TR OUTR JAZZ CLASSIC POPS ROCK FLAT BLED N.C.
24 23
0.066F
3 BL2
5.6k 1500pF
22
1500pF
4 TL
1500pF
21
1500pF
5.6k
OUT L VCC
10k 1F
OUT R
1F
5 OUTL 6 VCC 7 BIAS
100F 0.1F 0.1F 47F
20 19 18 17 16 15 14 13
LED x 6 10k
8
GND
9 SEL
0.1F
10 MUTE
CYC BB
VCC 4.7k
11 CYC 12 BB
SC5388
Note: Please use 0.068F, 1500pF Mylar Capacitors.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
8
Silan Semiconductors
PACKAGE OUTLINE
SC5388
UNIT: mm
2.54
SDIP-24-300-2.54
6.40
1.50 34.50
7.62
15 degree
3.51
0.46
SOP-24-375-1.27
3.30
5.08
UNIT: mm
10.45
7.70
1.27 15.74 15.34
0.41
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
9
1.95
9.53
0.25

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