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參數(shù)資料
| 型號： | AS2525B |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Single Chip Speaker Phone |
| 文件頁數(shù)： | 9/27頁 |
| 文件大?。?/td> | 459K |
| 代理商： | AS2525B |
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Datasheet AS2525
austria
micro
systems
Revision 2.1
Page 9 of 27
Memory Allocation
The EEPROM memory consists of three areas:
A = factory settings; B = user settings; C = stored numbers
A) factory settings
B) user settings
C) stored numbers
programmed in factory
Set-up programming
User-code programming
"reset to factory settings"
…write/read by AS2525
EEPROM
Figure 3: Memory allocation for external EEPROM
The AS2525 is writing and reading to and from area B and
C during normal operation and user-code programming.
Area A is protected during normal operation and contains a
back-up copy of the factory settings. This back-up copy
can be loaded into area B by the user with the user-code
programming procedure "reset to factory settings". The
only way to change the factory settings in area A is by set-
up programming using password. After changing area A by
set-up programming, the AS2525 automatically performs a
"reset to factory settings" to load this changes also into
area B.
Functional Description
DC Conditions
The normal operating mode is from 15 mA to 100 mA. An
operating mode with reduced performance is from 5 mA to
15 mA. In the line-hold range from 0 mA to 5 mA the device
is in a power down mode.
The dc characteristic is determined by the voltage at LI pin
and a 30
resistor between pin LI and LS. It can be
calculated by the following equation:
V
LS
= V
LI
+ I
LINE
* 30
VLI can be programmed to be 3.5 V or 4.5 V.
Table 7: DC mask selection
[PG] + [0] + (Password) + [#] + [3] + (digit) + [PG]
Digit
[0]
[1]
DC Mask (dc voltage at pin LI)
Low dc mask, VLI = 3.5 Volt
High dc mask, VLI = 4.5 Volt
100
80
60
40
ILine
20
0
0
2
4
6
8
VLine
VLS
VLI
(V)
(mA)
Figure 4: DC characteristic with low dc mask
2/4 Wire Conversion
AS2525 has a built-in dual Wheatstone bridge with one
common ground. This provides a maximum of
independence of ac impedance and side-tone from each
other. One can adapt side-tone without changing the ac
impedance.
AC Impedance
The ac impedance of AS2525 is set to 1000
. A complex
impedance can be adjusted by connecting an external
capacitor to the CI pin.
With an external resistor of
approximately 1.5 k
connected to the LS pin, it can be
programmed to 600
.
Z
AC(syn)
= 33
30
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| AS2525 | Single-Chip Handsfree Phone CMOS Integrated Circuit |
| AS2534ET | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
| AS2535 | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
| AS2535P | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
| AS2535T | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS2525B-T | 功能描述:IC HANDSFREE TELEPH CMOS 44-TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:* 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) |
| AS2525-DB | 制造商:AMS 功能描述:BOARD DEMO FOR AS2525 制造商:ams 功能描述:AS2525 Demo Board |
| AS2525F | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Single-Chip Handsfree Phone CMOS Integrated Circuit |
| AS2525Q | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Single-Chip Handsfree Phone CMOS Integrated Circuit |
| AS252R3FLF | 制造商:TT Electronics / IRC 功能描述:AS252R3FLF |
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