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AN1500A
APPLICATION NOTE
SINGLE CHIP TELEPHONE DEMO BOARD
SA2532K
1 Scope
This application note describes the use of the SA2532K Single Chip Telephone IC developed specifically to meet
with India’s Department of Telecommunication (DOT) Specification for the Electronic Telephone Instruments. This
application note is based on the use of the multi-purpose demo board DB1500I with the SA2532K IC
2 Key Features
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High performance telephone with speech circuit, DTMF/Pulse dialer and tone ringer
Very few external low cost components
CMOS technology, far less sensitive to EMC
EMC proof single sided layout, provision for EMC blocking capacitors installed
Internally set real AC impedance to reduce external components
Sidetone programmable by two resistors and one capacitor
Ring frequency discrimination
Line loss compensation selectable by jumper
2 different flash timings selectable by 2 flash keys
31 digit last number redial
Sliding cursor protocol and pause key
One-touch repeat dialing
1 direct memory
Tone / Pulse switch
Modular connectors for handset and line cord, line connector a/b- terminals selectable by jumper
Layout prepared for 16kHz blocking filters
19-key SPST Keyboard on board
Tone LED output Indicator
Several hook transistor configurations
Over-voltage and over-current circuit options
AN1500A
PDS038-SA2532K-001
Rev. C
21-03-00
SAMES [ SAMES ]
