SA2532KA Datasheet, PDF (1/21 Pages) Sames – SINGLE CHIP TELEPHONE FOR INDIA

sames
SA2532KA/B
SINGLE CHIP
TELEPHONE FOR INDIA
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 Description
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 Compensation whereby send and receive
gains are adjusted (by 6dB) over the ranges
selected by the LLC pin.
DAT_SH02
+
+
LI
LS
STB
RI
CS
BJT
LINE
CURRENT
SENSE
VDD
VDD
VSS
SA2532K
SOFT
CLIP
AGND
RO1
RO2
+
M1
M2
MO
MELODY
TONE
SEQUENCER
GENERATOR
MUTE
R4
R3
DIALER
R2
FC1
RING
FREQUENCY
CONTROL
LOGIC
OSC RAM
R1
DISCRIMINATION
+
HS/DP _MODE LLC OSC
MODE_OUT ^{C1 C2 C3 C4}
KEYPAD
+
PDS039-SA2532K-001 Rev. C 20-03-00