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參數(shù)資料
| 型號(hào)： | AS2525B |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類(lèi)： | 無(wú)繩電話/電話 |
| 英文描述： | Single Chip Speaker Phone |
| 文件頁(yè)數(shù)： | 1/27頁(yè) |
| 文件大?。?/td> | 459K |
| 代理商： | AS2525B |
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Revision 2.1
Page 1 of 27
austria
micro
systems
Key Features
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Line/speech handsfree circuit, LD/MF repertory dialler,
and tone ringer on one 44 pin CMOS chip
Operating range from 15 to 100 mA line current (down
to 5 mA with slightly reduced performance)
All significant parameters programmable with external
EEPROM
Volume control of receiver signal
Handsfree function with enhanced voice switching
Low noise (max. -72 dBmp)
Unique EMC performance
LD/MF switchable dialing with temporary MF mode
Repertory dialing with last number redial and memory
dialing (8 x 2 direct and 12 indirect)
Call restriction with PIN code
Serial interface for EEPROM and LCD driver
2-tone/3-tone ringer with ring frequency detection
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Package
Available in 44 pin TQFP.
General Description
The AS2525 is a CMOS mixed-mode integrated circuit for
use in feature phones, answering machines and fax
machines. It contains an analogue line interface and
speech circuit for a/b terminals, loudhearing, handsfree,
enhanced LD/MF dialler, tone ringer with dc/dc converter
and serial interface to EEPROM and LCD-driver (AS2591),
all in a 44 pin package. The circuit is fully line powered.
The AS2525 uses an external EEPROM for a 32 digit last
number redial storage and memories for 28 numbers each
containing up to 24 digits/data.
The device provides a volume control for the earpiece and
the loudspeaker. The volume can be controlled by pressing
the
[V-]/[V+]
keys.
The versatility of the circuit is provided by programming all
parameters through an external EEPROM. This allows easy
adaptation to various PTT requirements worldwide.
Block Diagram
CS
SS
LI
V
PP
LS
+
–
+
–
+
–
+
V
SS
30
RI
STB
300
Z
BAL
A
GND
V
DD
V
DD
V
DD
–
+
V
PP
V
PP
M1
M2
M3
M4
LO1
LO2
V
SSA
RECI
RECV
RO
NOISE
DET.
LINE
SENSE
PEAK
DET.
VOICE
SWITCHING
PEAK
DET.
DTMF
MELODY
DEBOUNCE
CPU
DIALLER
CODC/DC
OSCILLATOR
KEYSCANNING
CM
KEYBOARD (C1-4/R1-3)
HS
HF
DM/HM
FCI
DPN
LED
DI DO
CLK
CS1 CS2
V
SS
CI
SUPPLY
V
REF
V
DD
A
GND
A
GND
FT2
CBN
FT1
AS2525
3.58
MHz
Single-Chip Handsfree Phone
CMOS Integrated Circuit
AS2525
DATA SHEET
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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(guān)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(lèi)別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類(lèi)型:連續(xù)時(shí)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(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)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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