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M-8870-02 データシート(PDF) 6 Page - Clare, Inc.

部品番号 M-8870-02
部品情報  DTMF Receiver
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メーカー  CLARE [Clare, Inc.]
ホームページ  http://www.clare.com
Logo CLARE - Clare, Inc.

M-8870-02 データシート(HTML) 6 Page - Clare, Inc.

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6
M-8870
Rev. 3
AC Characteristics
Parameter
Symbol
Min
Typ*
Max
Units
Notes
Valid input signal levels (each tone
-
-29
-
+1
dBm
1,2,3,4,5,8
of composite signal)
-
27.5
-
869
mVRMS
Positive twist accept
-
-
-
10
dB
2,3,4,8
Negative twist accept
-
-
-
10
dB
Frequency deviation accept limit
-
-
-
± 1.5% + 2 Hz
Nom.
2,3,5,8,10
Frequency deviation reject limit
-
±3.5%
-
-
Nom.
2,3,5
Third tone tolerance
-
-25
-16
-
dB
2,3,4,5,8,9,13,14
Noise tolerance
-
-
-12
-
dB
2,3,4,5,6,8,9
Dial tone tolerance
-
+18
+22
-
dB
2,3,4,5,7,8,9
Tone present detection time
t
DP
5
8
14
ms
See Timing Diagram on page 7
Tone absent detection time
t
DA
0.5
3
8.5
ms
Minimum tone duration accept
t
REC
-
-
40
ms
User adjustable (see Basic Steering
Maximum tone duration reject
t
REC
20
-
-
ms
Circuit and Guard Time Adjustment
Minimum interdigit pause accept
t
ID
-
-
40
ms
on pages 3 and 4.)
Maximum interdigit pause reject
t
DO
20
-
-
ms
Propagation delay (St to Q)
t
PQ
-
6
11
µs
OE = VDD
Propagation delay (St to StD)
t
PStD
-
9
16
µs
Output data setup (Q to StD)
t
QStD
-
4.0
-
µs
Propagation delay (OE to Q), enable
t
PTE
-50
60
ns
R
L = 10 kΩ, CL = 50 pF
Propagation delay (OE to Q), disable
t
PTD
-
300
-
ns
Crystal clock frequency
f
CLK
3.5759
3.5795
3.5831
MHz
-
Clock output (OSC2), capacitive load
C
LO
--
30
pF
-
All voltages referenced to V
SS unless otherwise noted. For typical values VDD = 5.0 V, VSS = 0 V, TA = 25°C, fCLK = 3.579545 MHz.
*Typical figures are at 25°C and are for design aid only; not guaranteed and not subject to production testing.
Notes:
1. dBm = decibels above or below a reference power of 1 mW into a 600
Ω load.
2. Digit sequence consists of all 16 DTMF tones.
3. Tone duration = 40 ms. Tone pause = 40 ms.
4. Nominal DTMF frequencies are used, measured at GS.
5. Both tones in the composite signal have an equal amplitude.
6. Bandwidth limited (0 to 3 kHz) Gaussian noise.
7. The precise dial tone frequencies are (350 and 440 Hz) ± 2%.
8. For an error rate of better than 1 in 10,000.
9. Referenced to lowest level frequency component in DTMF signal.
10. Minimum signal acceptance level is measured with specified maximum frequency deviation.
11. Input pins defined as IN+, IN-, and OE.
12. External voltage source used to bias V
REF.
13. This parameter also applies to a third tone injected onto the power supply.
14. Referenced to Single - Ended Input Configuration on page 3. Input DTMF tone level at -28 dBm.


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