SA589 Datasheet, PDF (9/14 Pages) Sames – LD/DTMF SWITCHABLE DIALLERS WITH DEDICATED KEYS FOR 20 MEMORIES

SA589 FAMILY
SA589
17
MFOUT
R1
R2
8
FILTIN
C1
V
DD
9
FILTOUT
Typical values:
R1
= 56k Ω
R2
= 56k Ω
R4 + R3 = 10k Ω
C1
= 1.3nF
C2
= 470pF
DR-00686
C12
Fig. 4 DTMF tone filtering
OUTPUT
VS _S
HOOK SWITCH
KEY PRESS
COLUMN
ROW
"5"
MASK
IMP(LOW)
MUTE
MF OUT
DR-00687
"5"
100ms
"8"
100ms
"8"
100ms
"TBR"
"9"
"9"SHORTENED
ON HOOK
TIME OUT
Fig. 5 DTMF mode timing diagram
sames
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