參數(shù)資料
型號(hào)： AS2521BP
廠商： AUSTRIAMICROSYSTEMS AG
元件分類： 無繩電話/電話
英文描述： Telephone Speech Circuit with Loudhearing and Handsfree
中文描述： TELEPHONE SPEECH CKT, PDIP28
封裝： DIP-28
文件頁數(shù)： 13/14頁
文件大?。?/td> 96K
代理商： AS2521BP
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(guān)PDF資料
PDF描述
AS2521BT Telephone Speech Circuit with Loudhearing and Handsfree
AS2521P Telephone Speech Circuit with Loudhearing and Handsfree
AS2521T Telephone Speech Circuit with Loudhearing and Handsfree
AS2522BQ-Z Line Interface Speaker Phone; Package Type: TQFP-32; Temperature Range: -25 - +70 °C; Output Interface: Serial; Supply Voltage: 3,00-5,00
AS2522B Telephone Line Interface and Speakerphone Circuit
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
AS2522B 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
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