參數(shù)資料
型號(hào)： M-8870-01
廠商： CLARE INC
元件分類(lèi)： 信令電路
英文描述： DTMF Receiver
中文描述： TELECOM, DTMF SIGNALING CIRCUIT, PDIP18
封裝： PLASTIC, DIP-18
文件頁(yè)數(shù)： 6/9頁(yè)
文件大?。?/td> 301K
代理商： M-8870-01
www.clare.com
6
M-8870
Rev. 3
AC Characteristics
Parameter
Valid input signal levels (each tone
of composite signal)
Positive twist accept
Negative twist accept
Frequency deviation accept limit
Frequency deviation reject limit
Third tone tolerance
Noise tolerance
Dial tone tolerance
Tone present detection time
Tone absent detection time
Minimum tone duration accept
Maximum tone duration reject
Minimum interdigit pause accept
Maximum interdigit pause reject
Propagation delay (St to Q)
Propagation delay (St to StD)
Output data setup (Q to StD)
Propagation delay (OE to Q), enable
Propagation delay (OE to Q), disable
Crystal clock frequency
Clock output (OSC2), capacitive load
Symbol
-
-
-
-
-
-
-
-
-
t
DP
t
DA
t
REC
t
REC
t
ID
t
DO
t
PQ
t
PStD
t
QStD
t
PTE
t
PTD
f
CLK
C
LO
Min
-29
27.5
-
-
-
±3.5%
-25
-
+18
5
0.5
-
20
-
20
-
-
-
-
-
3.5759
-
Typ*
-
-
-
-
-
-
-16
-12
+22
8
3
-
-
-
-
6
9
4.0
50
300
3.5795
-
Max
+1
869
10
10
Units
dBm
mVRMS
dB
dB
Nom.
Nom.
dB
dB
dB
ms
ms
ms
ms
ms
ms
μs
μs
μs
ns
ns
MHz
pF
Notes
1,2,3,4,5,8
2,3,4,8
± 1.5% + 2 Hz
-
-
-
-
14
8.5
40
-
40
-
11
16
-
60
-
3.5831
30
2,3,5,8,10
2,3,5
2,3,4,5,8,9,13,14
2,3,4,5,6,8,9
2,3,4,5,7,8,9
See Timing Diagram on page 7
User adjustable (see Basic Steering
Circuit and Guard Time Adjustment
on pages 3 and 4.)
OE = VDD
R
L
= 10 k
, C
L
= 50 pF
-
-
All voltages referenced to V
unless otherwise noted. For typical values V
= 5.0 V, V
= 0 V, TA = 25°C, f
CLK
= 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
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
.
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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