SA2531 Datasheet, PDF (1/24 Pages) Sames – VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER

SA2531 A/B/C/E/G/U
sames
SA2531 A/B/C/D/E/F/G/J/U
VERSATILE SINGLE CHIP TELEPHONE
WITH 14 NUMBER REPERTORY DIALLER
FEATURES
s Speech circuit, LD/MF Repertory Dialler
and Tone Ringer on one 28 pin CMOS
chip
s Net 4 compatible
s Soft clip to avoid harsh distortion
s Line Loss Compensation selectable by
pin option
s Power down mode
s Versatile applications for different PTT
demands
s 31 digit last number redial
s Sliding Cursor protocol with comparison
s 2 Flash keys, 100 ms and 280 ms (option
600 ms)
s Ring frequency discrimination
s Operating range from 13 to 100 mA
(down to 5 mA with reduced perform-
ance)
s Volume control of receive signalExcept
"D")
s Low noise (max. -72dBmp)
s Real or Complex impedance on chip pro-
grammable
s LD/MF switchable dialling
s 14 memories, 4 direct/10 indirect or 10
direct
s Pause key for 2, 3 or 6 sec Auto Pause or
Wait function
s On chip MF filter (CEPT CS 203 compat-
ible)
s 3-tone melody generator
GENERAL DESCRIPTION
The SA2531 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.
A RAM is on chip for a 31 digit last number redial and 14 memories each containing up to 21
digits. The sliding cursor procedure makes Last Number Redial easy behind a PABX.
The SA2531 (exept the SA2531D) incorporates a volume control for the earpiece. The receive
volume can be controlled by the VOL key (+4dB) or by the +/- keys (+6dB/-4dB in 5 steps).
The versatility of the circuit is provided by on chip programmability and a few external
components. This allows easy adaption to different PTT requirements without changing the
PCB of the telephone.
M82-2013
sames
PDS039-SA2531-001 Rev.D
1/24
15-05-97