STK301-220 Sanyo Semiconductor Corporation, STK301-220 Datasheet - Page 4

• Manufacturer Part Number: STK301-220
• Description: 7-band, 2-channel Electronic Equalizer
• Manufacturer: Sanyo Semiconductor Corporation

Pin Descriptions
Note: Refer to LC7522 or LC7523 specifications concerning pins which do not appear here and are hybrid IC (HIC) pins connected directly to a LC7522 or
Description of Operation
The STK301-220 is a hybrid IC (HIC) with a 7-component 2-channel construction for electronically controlled graphic
equalizer applications. It employs an LC7522 for graphic equalizer electronic volume control and an M5229 for 7-
component graphic equalizer functions.
Pin No.
2, 21
10
11
12
13
14
15
16
17
18
19
20
1
3
4
5
6
7
8
9
LC7523 pins.
GND (–V
OUTPUT 1
OUTPUT 2
Pin name
INPUT 1
INPUT 2
+V
+V
1IN 1
1IN 2
2IN 2
2IN 1
NF 1
NF 2
CLK
V
V
V
DC
DI
S
CC
SS
EE
CC
DD
1
2
CC
1)
Power supply pin used for + power supply to IC2 and IC3 graphic equalizer.
Pin for 1/2 V
ripples are vulnerable.
Output pin 1.
Inverting input for the graphic equalizer IC2 internal operational amplifier.
Audio signal input 1 (INPUT1) for electronic volume control IC1
Input impedance for input pin 1 rated at approximately 60 kΩ (1 kHz, flat).
Audio signal input 2 (INPUT1) for electronic volume control IC1
Power supply pin connected to ground (GND).
Power supply pin used for audio signal power supply to electronic volume control section. When single power supply is used,
connect to V
Power supply pin rated at +5 V (typ). Make sure that V
Power supply pin for ground (- power supply) of IC2 and IC3 graphic equalizer.
Power supply pin used for audio signal power supply to electronic volume control section.
Audio signal input 2 (INPUT2) for electronic volume control IC1
Input impedance for input pin 2 rated at approximately 60 kΩ (1 kHz, flat).
Audio signal input 1 (INPUT2) for electronic volume control IC1
Inverting input for the graphic equalizer IC3 internal operational amplifier.
Output pin 2.
CC
SS
1 decoupling capacitor of graphic equalizer IC. When shortened, power supply becomes more effective and
.
Figure 1 Equivalent Circuit Block Diagram
Input pin for data from CPU according to Schmitt inverter format.
Input pin for clock from the CPU according to Schmitt inverter format.
Select pin for applications using two ICs. Input “1” to initiate key code 7C3 for
connecting to V
STK301-220
DD
CC
Functions
. Input “0” to initiate key code 7C2 for connecting to V
2 does not onset before V
DD
.
EE
.
No. 4793-4/8