SA2531 Datasheet, PDF (8/24 Pages) Sames – VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER

SA2531 A/B/C/E/G/U
Tone Generator
The tone generator incorporates the DTMF tones and 3 basic frequencies for the tone
ringer.
DTMF Tones
The DTMF Tone Generator creates 12 Tones in compliance with CCITT Recommenda-
tion Q23. Signal levels are altered by Mask Option. High group frequencies have a level
2.6dB higher than those of the Low Group.
Details of the DTMF Tones are:
Low group
Digit 1-2-3
Digit 4-5-6
Digit 7-8-9
Digit *-0-#
697Hz
770Hz
852Hz
941Hz
(Error = -.074%)
(Error = -.679%
(Error = -.621%)
(Error = +.139%)
High group
Digit 1-4-7-* 1209Hz
(Error = +.533%)
KEYBORD ARRANGEMENT 1
10 Direct memories (either VOL or +/- keys)
Figure 2
8/24
sames