ml7005mb Oki Semiconductor, ml7005mb Datasheet - Page 12

• Manufacturer Part Number: ml7005mb
• Description: Dtmf Transceiver Ml7005dtmf Transceiver
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Timing When DTMF is received
t
t
t
t
t
t
t
t
t
DETDT
REJDT
POSDT
BRKDT1
BRKDT2
CYCDT
DELDT
HOLDT
SP
:
DTMF Receive Data
: Time to Reject
: Interdigit Pause
: Time to Detect
: Detect Delay Time
: Signal Repetition Time
: Detect Hold Time The SP and DTMF receive data outputs stop with a delay of the
: Acceptable Drop Out Time 1
: Acceptable Drop Out Time 2
When Time to Detect is the specified value of t
normally received.
When Time to Reject is the specified value of t
and the SP and DTMF receive data are not output.
When there is no input signal for the period of t
and SP are reset. Even if the receive data is changed, when Interdigit Pause Time is the
value of t
the DTMF receive data may maintain its initial value.
Acceptable Drop Out Time 1 is applied between when the input signal comes and when
SP becomes "0". Even if there is no input signal for the period of t
and DTMF receive data are normally output.
Acceptable Drop Out Time 2 is applied when SP is "0" (when receive data is output).
Even if there is no input signal during signal reception for the period of t
SP and DTMF receive data are not reset.
Signal Repetition Time should be the specified value of t
is normally received.
The DTMF receive data is output with a delay of the specified value of t
input signal appears.
specified value of t
SP Delay Time
The SP data is output with a delay of the specified value of t
data is output. The DTMF receive data should be latched after detecting the fall of SP.
AIN Signal
SP
POSDT
t
REJDT
Figure 3 Timing When DTMF is Received
or less (including the change without Drop Out), SP remains at "0" and
HOLDT
t
DELDT
after the input signal disappears.
t
DETDT
t
SP
t
CYCDT
t
t
HOLDT
POSDT
REJDT
POSDT
DETDT
t
BRKDT1
or less, the input signal is ignored
or more, the DTMF receive data
CYCDT
or more, the DTMF signal is
SP
t
BRKDT2
after the DTMF receive
or more so that a signal
BRKDT1
DELDT
BRKDT2
or less, the SP
ML7005
after the
or less,
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