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參數(shù)資料
| 型號： | AS2521B |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 英文描述： | Telephone Speech Circuit with Loudhearing and Handsfree |
| 中文描述： | 電話語音電路Loudhearing和免提 |
| 文件頁數(shù)： | 13/14頁 |
| 文件大?。?/td> | 96K |
| 代理商： | AS2521B |
Preliminary
AS2520/21/20B/21B
Rev. 5.1
Page 13
May 1999
Application Diagramme
A
L
TI
LI
La
Lb
Vss
CS
V
DD
PD
MT
RO
M1
CI
STB
LSI
A
GND
LS
RI
HS
LO
V
PP
CM
LE
M3
SS
RTH
V
SSP
M2
M4
LLC
15 n
10 n
300
1k8
7k5
10 μ
100 n
100 n
100 μ
32
470 μ
5k6
10 k
2N5551
2.2 mH
5V1
MPSA92
33 n
510
1μ5
510
1μ5
BC327
100 μ
33 n
10 μ
BC327
10 V
30
27
25
26
1
28
4
9
16
18
15
17
10
5
24
11
12
14
7
13
20
8
3
6
22
2
19
21
VOL
100 k
23
Side tone
balance
network
A
GND
15 n
100 n
100 n
2k2
1k2
1k2
220 μ
1 μ
INPUT FOR DTMF
AND
TONE RINGER MELODIES
CONTROL INPUTS
(FROM μC)
V
DD
V
DD
VOL+
VOL-
10 k
AS2521
AS2520
High
Low
Off
1k8
1k8
Figure 9: Application Diagramme
Applications Hints
Interface to Microcontroller
In off-hook condition the microcontroller can be supplied from V
DD
of AS252x. The digital inputs (HS, LE, PD, and
MT) must be kept low until V
DD
has reached its minimum operating voltage (>2.5V).
Radio Frequency Interference
The RFI sensitivity has been minimised by the consequent use of CMOS technology and one overall ground and
by having differential inputs with a relative low input impedance.
For further application information see application notes for the AS2520 series.
相關PDF資料 |
PDF描述 |
|---|---|
| AS2520BP | Telephone Speech Circuit with Loudhearing and Handsfree |
| AS2520BT | Telephone Speech Circuit with Loudhearing and Handsfree |
| AS2521BP | Telephone Speech Circuit with Loudhearing and Handsfree |
| AS2521BT | Telephone Speech Circuit with Loudhearing and Handsfree |
| AS2521P | Telephone Speech Circuit with Loudhearing and Handsfree |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AS2521BP | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Telephone Speech Circuit with Loudhearing and Handsfree |
| AS2521BT | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Telephone Speech Circuit with Loudhearing and Handsfree |
| AS2521P | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Telephone Speech Circuit with Loudhearing and Handsfree |
| AS2521T | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Telephone Speech Circuit with Loudhearing and Handsfree |
| AS2522/AS2523/AS2524 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:語音和免提通話IC |
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