AS2540Q AMSCO [austriamicrosystems AG], AS2540Q Datasheet - Page 3

• Manufacturer Part Number: AS2540Q
• Description: Remote Controlled Single-Chip-Telephone
• Manufacturer: AMSCO [austriamicrosystems AG]

Data Sheet AS2540
Revision 3.1
Pin #
25
12
26
27
20
21
22
23
24
10
13
14
1
9
Symbol
AGND
OSC
ROH
RXD
TXD
ROT
TIT
M2
M1
R1
R2
C1
C2
C3
O
Input for ceramic resonator 3.58MHz.
Recommended type: Murata CSA 3.58MG312AM or compatible
A
Special ground for the internal amplifiers
R
Schmitt trigger input to serial interface
T
Open drain output from serial interface
Keyboard
Keyboard
R
Output for driving a transformer with an ac impedance larger than 10k
T
Single ended input for transformer
R
Output for driving a dynamic earpiece with an impedance from 150
M
Differential inputs for the microphone (electret)
ransmit
ransformer
nalogue
eceive
eceive
eceive
scillator Input
icrophone Inputs
D
O
O
D
R
C
G
ata Input
utput to
utput to
ata Output
ows
olumns
round
I
nput from
T
H
ransformer
andset
T
ransformer
Function
to 300
austriamicrosystems
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