參數(shù)資料
型號： AS2540Q
廠商： AUSTRIAMICROSYSTEMS AG
元件分類： 無繩電話/電話
英文描述： Remote Controlled Single-Chip-Telephone
中文描述： TELEPHONE MULTIFUNCTION CKT, UUC
封裝： DIE
文件頁數(shù)： 3/18頁
文件大?。?/td> 248K
代理商： AS2540Q
Data Sheet AS2540
austria
micro
systems
Revision 3.1
Page 3 of 18
Pin #
Symbol
Function
25
OSC
O
scillator Input
Input for ceramic resonator 3.58MHz.
Recommended type: Murata CSA 3.58MG312AM or compatible
12
AGND
A
nalogue
G
round
Special ground for the internal amplifiers
26
RXD
R
eceive
D
ata Input
Schmitt trigger input to serial interface
27
TXD
T
ransmit
D
ata Output
Open drain output from serial interface
20
21
R1
R2
Keyboard
R
ows
22
23
24
C1
C2
C3
Keyboard
C
olumns
10
ROT
R
eceive
O
utput to
T
ransformer
Output for driving a transformer with an ac impedance larger than 10k
1
TIT
T
ransformer
I
nput from
T
ransformer
Single ended input for transformer
9
ROH
R
eceive
O
utput to
H
andset
Output for driving a dynamic earpiece with an impedance from 150
to 300
13
14
M2
M1
M
icrophone Inputs
Differential inputs for the microphone (electret)
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