U3760MB Datasheet, PDF (9/19 Pages) TEMIC Semiconductors – Low-Voltage Standard Telephone Circuit

HKS
KEY IN
DP
MUTE
3
2
t_KID
t_PDP
t_PDP ^tIDP
t_B ^tIDP
t_M
U3760MB
10626
R/P
t_KID
t_PDP
KT
MFO
LOW
Oscillation
OSC
ON HOOK OFF HOOK Normal dialing
Figure 2. Pulse mode
HKS
Oscillation
Auto dialing
10627
KEY IN
MFO
MUTE
KT
DP
OSC
Rev. A3, 19-Feb-98
t_KID
t_KRD
t_TD t_ITP
t_KRD
t_ITP
t_KID
t_ITP
HIGH
LOW
Oscillation
Figure 3. DTMF mode normal dialing
Oscillation
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