AS2507T AMSCO [austriamicrosystems AG], AS2507T Datasheet

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AS2507T

Manufacturer Part Number
AS2507T
Description
SINGLE CHIP 2-WIRE INTERCOM CMOS INTEGRATED CIRCUIT
Manufacturer
AMSCO [austriamicrosystems AG]
Datasheet
Preliminary Data Sheet
Austria Mikro Systeme International AG
Key Features
Application
Entrance telephone system, intercom and data
transmission, alarm systems, toy phone
Block Diagram











Line/speech circuit and signalling on one 14
pin CMOS chip
Only 2 wires needed for power supply,
signalling and speech
Soft clipping to avoid harsh distortion
Fully integrated 2/4 wire conversion
Side tone cancellation
Low noise
Signalling with FSK modem
Low standby power consumption allows
parallel operation of up to 25 terminals on a
bus pair with central supply
Parallel operation of up to 70 terminals if
supplied locally
Controllable via simple µC interface
Very few external components
®
1/9
General Description
The AS2507 is a CMOS integrated circuit that
contains all the functions needed to build a 2-
wire intercom network.
The device incorporates 2/4-wire conversion
(hybrid), soft clipping for high speech quality,
FSK modem and a simple interface to a
microcontroller.
The signalling mode is selectable between
FSK modulation and burst mode.
The low standby current (typ. 2 mA) allows
several devices to listen to the 2-wire line.
The speech circuit is designed for compatibility
with commonly used handset (150
and electret microphone) with receive gain of
-6 dB and transmit gain of 32 dB (relative to
line).
Package
Available in 14 pin DIP and 16 pin SOIC
Single Chip 2-Wire Intercom
CMOS Integrated Circuit
July 1998
earpiece
AS2507

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AS2507T Summary of contents

Page 1

Preliminary Data Sheet ® Austria Mikro Systeme International AG Key Features  Line/speech circuit and signalling on one 14 pin CMOS chip  Only 2 wires needed for power supply, signalling and speech  Soft clipping to avoid harsh distortion ...

Page 2

Preliminary Data Sheet Pin description Pin # Pin # Symbol DIP Differential input for the microphone (electret Differential input for the microphone (electret Input for ...

Page 3

Preliminary Data Sheet Functional Description The AS2507 is a CMOS integrated circuit that incorporates a speech circuit and a FSK modem intended to be used as line- powered interface on a 2-wire intercom bus. Standby Condition During standby ...

Page 4

Preliminary Data Sheet Typical 2-Wire Intercom Application 4/9 AS2507 July 1998 ...

Page 5

Preliminary Data Sheet Electrical characteristics Electrical charateristics are measured with the Test Circuit application. Typical mean values will not be tested. Absolute maximum ratings Positive Supply Voltage Input Current Analogue Input Voltage Digital Input Voltage Electrostatic Discharge (HBM 1.5k -100pF) ...

Page 6

Preliminary Data Sheet Transmit characteristics V =5V, f=1kHz, unless other specified DD Symbol Parameter A Transmit Gain TX M1/M2 —> TO THD Distortion V Noise Output Voltage Soft Clip Level AGC1 M1/M2 —> ...

Page 7

Preliminary Data Sheet FSK characteristics V =5V, f=1kHz, unless other specified DD Symbol Parameter f MARK Frequency MARK f SPACE Frequency SPACE f Valid input frequency MARK range MARK f Valid input frequency SPACE range SPACE V Minimum Receive Input ...

Page 8

Preliminary Data Sheet Packaging The device is available in the packages outlined below (not to scale). For exact mechanical package dimensions please see AMS packaging information. AG 14-pin plastic DIP (suffix P) Max. Body Length 20.19mm / 795mil Max. Body ...

Page 9

Preliminary Data Sheet Ordering information Number Package Description AS2507 P DIP14 plastic dual inline package - 14 leads (suffix P) AS2507 T SO16w plastic small outline package - 16 leads (suffix T) Devices sold by Austria Mikro Systeme Int. AG ...

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