SA2532KA Datasheet, PDF (4/21 Pages) Sames – SINGLE CHIP TELEPHONE FOR INDIA

SA2532KA/B
Pin Description Cont'd
Pin #
22
20
19
18
17
16
15
14
13
7
Symbol
MODE
R1
R2
R3
R4
C1
C2
C3
C4
CI
Function
Signalling Mode Select Input
Mode pin Function
High
LD default mode, make/break = 33/66 ms
Open
MF only
Low
LD default mode, make/break = 40/60 ms
Keyboard Rows
Keyboard Columns
Complex Impedance Input
Input pin for the capacitor in the complex impedance
Keyboard Connections
C1
C2
C3
C4
R1
MUTE
1
2
3
R2
4
5
6
7
R3
8
9
0
*
R4
#
PAUSE
R
R2
LNR
ENTER
M5
Figure 2
4 /21
sames