AS2534BT Austriamicrosystems, AS2534BT Datasheet - Page 3

• 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
Pin Description cont´d
Selection Overview
Function
Direct memories (one-key)
Indirect memories (two-key)
Repeat dialling
LNR key
Pause insertion by LNR key
Pause (PS) key
P/M or MT key
Tone/Pulse (T/P) key
Temperary MF by * key
Centrex (A - D) keys
Volume (VOL, –/+) keys
Volume reset by off-hook
Programming of tone ringer
R3 Flash duration
Rev. 7
Pin #
12
20
19
18
17
16
15
14
13
7
2
Symbol
MODE
MFL
R1
R2
R3
R4
C1
C2
C3
C4
CI
Function
Signalling Mode Select Input
Mode pin
Open
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
During temporary MF: 82/160 ms
Keyboard Rows
(see key arrangement in figure 2)
Keyboard Columns
(see key arrangement in figure 2)
Complex Impedance Pin
For complex impedance a capacitor should be connected to this pin.
MF Level Setting
A voltage divider connected from this pin to A
level.
AS2533
600 ms
P/M
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
10
4
Function
Dialling inhibited
LD mode, 10 pps, 33/66 ms
LD mode, 10 pps, 40/60 ms
LD mode, 20 pps, 33/66 ms
LD mode, 20 pps, 40/60 ms
LD mode, 10 pps, 33/66 ms, Temp. MF with tone on first * key entry
MF only, 82/82 ms
MF only, 82/160 ms
AS2534B
600 ms
P/M
yes
yes
yes
yes
yes
yes
yes
yes
yes
no
0
0
3
AS2534E
375 ms
yes
yes
yes
yes
yes
yes
yes
yes
MT
no
no
0
0
GND
and V
SS
AS2535
600 ms
can be used to set the DTMF
P/M
yes
yes
yes
yes
yes
yes
no
no
12
no
no
0
AS2536
600 ms
AS2533...6
P/M
yes
yes
yes
yes
yes
yes
yes
yes
yes
10
no
4
July 1998