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AS2534 参数 Datasheet PDF下载

AS2534图片预览
型号: AS2534
PDF下载: 下载PDF文件 查看货源
内容描述: 多标准CMOS单芯片IC电话与双软剪辑 [Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping]
分类和应用: 电话
文件页数/大小: 25 页 / 274 K
品牌: AMSCO [ AUSTRIAMICROSYSTEMS AG ]
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Data Sheet
AS2533...6
®
Austria Mikro Systeme International AG
Multi-Standard CMOS Single Chip
Telephone IC with Dual Soft Clipping
General Description
The AS253x is a CMOS integrated circuit that contains
all the functions needed to form a high performance
electronic telephone.
The device incorporates LD/MF repertory dialling, melody
generation, ring frequency discrimination and a high
quality line/speech circuit.
A RAM is on chip for a 31 digit last number redial and
memories (not AS2534) each containing up to 21 digits/
data. The sliding cursor procedure makes the LNR
function easy to use under various PABX systems. Also
centrex keys (not AS2535) are provided.
The device incorporate a volume control for the earpiece.
The volume can be controlled by the VOL key (+ 5.4 dB)
or by the –/+ keys (+8.1 dB/-5.4 dB in 5 steps).
The versatility of the circuit is provided by pin options
and a few external components. This allows easy
adaptation to different PTT requirements.
Key Features
u
Line/speech circuit, LD/MF repertory dialler and
tone ringer on one 28 pin CMOS chip
u
Operating range from 13 to 100 mA (down to 5 mA
with reduced performance)
u
Soft clipping to avoid harsh distortion
u
Volume control of receive signal
u
Line loss compensation selectable by pin option
u
Low noise (max. - 72 dBmp)
u
Real or complex impedance
u
NET 4 compatible
u
LD/MF switchable dialling
u
Pacifier tone during programming
u
31 digit last number redial
u
Repertory memories (not AS2534), 4 direct/10
indirect (AS2533/6), 12 direct (AS2535)
u
Repeat dialling by busy or engaged (not AS2535)
u
Sliding cursor protocol with comparison
u
Pause key for access pause or wait function
u
3 flash keys, 100 ms, 280 ms and 375/600 ms
u
On chip MF filter (CEPT CS 203 compatible)
u
Ring frequency discrimination
u
3-tone melody generator
Package
Available in 28 pin SOIC or DIP.
Block Diagramme
La
Z2
Z1
Z
BAL
Lb
LI
CS
CI
LS
RI
STB
A
GND
LED
RO
LINE ADAPTATION
POWER EXTRACTION
DC MASK
LINE
CURRENT
SENSE
SOFT CLIP
AGC
M2
M1
V
DD
V
DD
Vss
AS253x
MELODY
SEQUENCER
TONE
GENERATOR
MUTE
MO
R4
R3
RAM
DIALLER
R2
R1
FCI
RING
FREQUENCY
DISCRIMINATION
CONTROL
LOGIC
OSC
HS/DP
LLC
OSC
3.58
MHz
MFL
MODE
C1
C2
C3
C4
LLC Hi
LLC Lo
LLC Off
A
GND
KEY
PAD
Rev. 7
1
July 1998