AS2534BT Austriamicrosystems, AS2534BT Datasheet - Page 4

• Manufacturer Part Number: AS2534BT
• Description: AS Series 3.8 to 5V Multi-Standard CMOS Telephone IC for Basic Telephone SOIC-28
• Manufacturer: Austriamicrosystems

Data Sheet
Keyboard Connections
Key closure, R
Key open, R
For AS2534E
P/M is MT key.
Rev. 7
OFF
ON
R1
R2
R3
R4
R1
R2
R3
R4
min. = 1 Mohm
max. = 1 kohm
L
L
P
L
P
L
P
P
R
M
R
R
M
R
N
C1
N
N
C1
N
/
A
/
A
/
4
8
#
A
/
4
8
#
A
4
8
#
4
8
#
M
P
M
M
P
P
M
P
2
2
R
R
R
R
V
V
V
V
R
P
M
R
P
M
R
P
R
P
C2
O
C2
O
O
O
B
B
1
5
9
B
1
5
9
B
1
5
9
1
5
9
S
1
S
S
1
S
1
3
1
3
L
L
L
L
Figure 2a (AS2533/6)
Figure 2b (AS2534)
T
T
T
T
M
R
M
R
R
R
C3
+
C3
+
+
C
+
C
2
6
0
C
/
C
2
6
0
2
6
0
/
/
2
6
0
/
4
2
P
2
2
P
4
P
4
2
P
(Either VOL or +/– keys)
M
M
M
M
R
R
R
R
C4
C4
–
D
–
D
3
7
*
D
–
3
7
*
–
D
3
7
*
3
7
*
R
3
1
R
3
3
3
1
AS2533...6
July 1998