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SA2532US Datasheet

  • SA2532US

  • VERSATILE SINGLE CHIP TELEPHONE

  • 22頁

  • SAMES

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SA2532
sames
FEATURES
n
Speech circuit, LD/MF Dialler and Tone
Ringer on one 28 pin CMOS chip
n
Soft clip to avoid harsh distortion
n
Line Loss Compensation selectable by
pin option
n
Power down mode
n
Versatile applications for different PTT
demands
n
31 digit last number redial
n
Sliding Cursor protocol with comparison
n
2 Flash keys, 100 ms and 280 ms (option
600 ms)
n
Pause key for 3 sec Auto Pause or Wait
Function
GENERAL DESCRIPTION
The SA2532 is a CMOS integrated circuit that
contains all the functions needed to form a
high performance electronic telephone.
The device incorporates LD/MF dialling,
melody generation, ring frequency discrimi-
nation and a high quality speech circuit.
A RAM is on chip for a 31 digit last number
redial. The sliding cursor procedure makes
Last Number Redial easy behind a PABX.
The versatility of the circuit is provided by on
chip programmability and a few external com-
ponents. This allows easy adaption to differ-
ent PTT requirements without changing the
PCB of the telephone.
n
n
SA2532 A/C/U
VERSATILE SINGLE CHIP TELEPHONE
Ring frequency discrimination
Operating range from 13 to 100 mA
(down to 5 mA with reduced perform-
ance)
Low noise (max. -72dBmp)
Real or Complex impedance on chip pro-
grammable
LD/MF switchable dialling
On chip MF filter (CEPT CS 203 compat-
ible)
3-tone melody generator with selectable
repetition rates
n
n
n
n
n
PACKAGE
Available in 28 pin DIP and SOIC
LS
RO2
RO1
V DD
A GND
STB
CI
MO
LLC
HS DP
OSC
RR
C4
C3
1
28
RI
LI
V SS
CS
M2
M1
SA2532
MODE
FCI
R1
R2
R3
R4
14
DR-00975
15
C1
C2
sames
4153
PDS039-SA2532-001
Rev. C
1/22
1/22
23-10-1995

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