SA2532P Datasheet, PDF (1/21 Pages) Sames – ONE MEMORY SINGLE CHIP TELEPHONE

sames
SA2532P
ONE MEMORY SINGLE
CHIP TELEPHONE
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 SA2532P 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.
5M1
680n
2K2
La
Off
On
4 x 1N4004
Lb
20
12V
100K
220K
Off
On
150K
1M
BSS92
30
10
2N5551
CS
BC327
LI
CI
300
6K
+
1u
LS
STB
+
10u
RI
Line Adaption
Power Extraction
DC Mask
LINE
CURRENT
SENSE
SA2532P
AGND
BC547B
100K
1N4148
12V
510
Ringer
330K
+
10u
18V
VDD
VDD
VSS
SOFT
CLIP
MO
330K
FC1
220K
10n
+
5V1
470u
MELODY
SEQUENCER
TONE
GENERATOR
RING
FREQUENCY
DISCRIMINATION
CONTROL
LOGIC
OSC
RAM
MUTE
DIALER
HS/DP
MODE
LLC OSC
1K
MODE_OUT
C1 C2 C3 C4
3.58MHz
KEYPAD
2K2
RO1
+
RO2
100u
1K8
10n
M1
M2
10n
1K8
R4
R3
R2
R1
DAT_SH05
PDS039-SA2532P-001 Rev. B 21-03-00