DAT_SH02
PDS039-SA 2532K-001 Rev. C 20-03-00
sames
samessames
sames
Key Features
•
Speech Circuit, LD/MF Dialler and Tone Ringer
on one 28 pin CMOS chip
•
Low Noise
•
31 digit Last Number Redial
•
Line Loss Compensation selectable by pin
option
•
2 Timed Break Recall keys
•
Moving Cursor protocol with comparison
•
On chip MF filter (CEPT CS 203 compatible)
•
Pause key for auto pause or wait function
•
Power down mode
•
Ring frequency discrimination
•
Selectable Loop-Disconnect or DTMF dialling
modes
•
Real or complex impedance programmable
•
Soft Clipping to avoid harsh distortion
•
Uses inexpensive 3.58MHz ceramic resonator
•
Operating range from 13 to 100 mA
•
3 Tone melody generator
Block Diagram
General Descript i on
The SA2532K 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 speech circuit.
Soft switch into temporary MF mode using * when
LD mode is selected .Timed Break Recall will be
available in both LD and MF dialling modes.
A 31 digit Last Number Redial (LNR) memory, with
moving cursor protocol, activated by single key
depression.
Line Loss Com pens ation whereby send and r eceive
gains are adjusted (by 6dB) over the ranges
selected by the LLC pin.
KEYPAD
MODE_OUT
A
GND
RISTBLS
LI
CS
DD
V
MO
SS
V
FC1
HS/DP
LLC
OSC
C1 C2 C3 C4
R1
R2
R3
R4
M2
M1
RO2
RO1
MUTE
SA2532K
DIALER
CLIP
SOFT
SENSE
CURRENT
LINE
BJT
GENERATOR
TONE
SEQUENCER
MELODY
RAMOSC
LOGIC
CONTROL
DISCRIMINATION
FREQUENCY
RING
DD
V
+
+
+
+ +
+
hook
MODE
SA2532KA/B
SINGLE CHIP
TELEPHONE FOR INDIA
