¡ Semiconductor
ML7005
AC Characteristics 5 DTMF Receiver
(VDD = 2.7 to 5.5 V, Ta = –30 to +85°C)
Parameter
Symbol
VDETDT1
VDETDT2
VREJDT
Condition
Min.
–42
–42
—
Typ.
—
—
—
—
—
—
—
–12
45
—
—
—
—
—
—
—
—
—
—
—
—
26
41
20
28
0.6
Max.
–10
0
Unit
2.7 V £ VDD £ 5.5 V
4.5 V £ VDD £ 5.5 V
Per Frequency at DTRIO
DTMF Detect Amplitude
dBm
DTMF Non-detect Amplitude
Detect Frequency
–60
+1.8
—
fDETDT
–1.8
3.8
—
To Nominal Frequency
%
Non-detect Frequency
fREJDT
–3.8
+6.0
—
Level Twist
VTWIST
VN/S
VHigh Group - VLow Group
N/S (N : 0.3 to 3.4 kHz)
360 to 440 Hz
–6.0
—
Noise to Signal Ratio
Dial Tone Rejection Ratio
dB
VREJDT
tCYCDT0
tCYCDT1
tDETDT0
tDETDT1
tREJDT0
tREJDT1
tPOSDT0
tPOSDT1
tBRKDT10
tBRKDT11
tBRKDT20
tBRKDT21
tDELDT0
tDELDT1
tHOLDT0
tHOLDT1
tSP
—
—
DTTIM = "1"
60
—
Signal Repetition Time
Time to Detect
DTTIM = "0"
90
—
DTTIM = "1"
Detect
35
—
DTTIM = "0"
49
—
DTTIM = "1"
Non-detect
—
10
Time to Reject
DTTIM = "0"
—
24
DTTIM = "1"
DTTIM = "0"
21
—
Interdigit Pause Time
30
—
*1
ms
SP = "1" DTTIM = "1"
(Before output) DTTIM = "0"
SP = "0" DTTIM = "1"
(During output) DTTIM = "0"
DTTIM = "1"
—
0.4
0.4
3
—
Acceptable Drop Out Time
Detect Delay Time
—
—
10
12
37
DTTIM = "0"
24
49
DTTIM = "1"
15
27
Detect Hold Time
SP Delay Time
DTTIM = "0"
24
35
DTTIM = "1", "0"
0.2
1.0
*1 See the figure 3 for timing.
The input level includes the entire range indicated in V
and V
.
DETDT1
DETDT2
The input frequency includes the entire range indicated in f
.
DETDT
11/24
OKI [ OKI ELECTRONIC COMPONETS ]
