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參數資料
| 型號： | MS8870 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | DTMF Receiver |
| 中文描述： | 雙音多頻接收器 |
| 文件頁數： | 4/8頁 |
| 文件大小： | 138K |
| 代理商： | MS8870 |
MOSA ELECTRONICS
MS8870
DTMF Receiver
－
4
－
AC Electrical Characteristics *
Characteristics
Sym
Min
Typ
Max
Units
Notes
S
I
Valid input signal levels
G
(each tone of composite signal)
N
A
Positive twist accept
L
Negative twist accept
Freq. deviation accept
C
Freq. deviation reject
O
Third tone tolerance
N
Noise tolerance
D.
Dial tone tolerance
T Tone present detect time
I Tone absent detect time
M Tone duration accept
I Tone duration reject
N Interdigit pause accept
G Interdigit pause reject
O Propagation delay (St to Q)
U Propagation delay (St to StD)
T Output data set up ( Q to StD)
P Propagation delay (TOE to Q
U ENABLE)
T Propagation delay (TOE to Q
S DISABLE)
C Crystal / clock frequency
L Clock input rise time
O Clock input fall time
C Clock input duty cycle
K Capacitive load (OSC2)
-29
27.5
dBm
mV
RMS
1,2,3,5,6,9
dBm
1,2,3,5,6,9
mV
RMS
1,2,3,5,6,9
dB
2,3,6,9
dB
2,3,6,9
Nom.
2,3,5,9
Nom.
2,3,5,9
dB
2,3,4,5,9,10
dB
2,3,4,5,7,9,10
dB
2,3,4,5,8,9,11
ms
Refer to Fig. 3
ms
Refer to Fig. 3
ms
User adjustable
ms
User adjustable
ms
User adjustable
ms
User adjustable
μ
s
TOE = V
DD
μ
s
TOE = V
DD
μ
s
TOE = V
DD
ns
RL = 10K
CL = 50 pF
ns
RL = 10K
CL = 50 pF
MHz
ns
Ext. clock
ns
Ext. clock
%
Ext. clock
pF
1,2,3,5,6,9
+1
883
14
8.5
40
40
11
3.5831
110
110
60
30
10
10
-16
-12
+22
11
4
8
12
3.4
50
300
3.5795
50
±
1.5%
±
2Hz
±
3.5%
5
0.5
20
20
3.5759
40
t
DP
t
DA
t
REC
/t
REC
t
ID
t
DO
t
PQ
t
PStD
t
QStD
t
PTE
t
PTD
fc
t
LHCL
t
HLCL
DC
DL
C
LO
* All voltages referenced to Vss unless otherwise noted. Vcc = 5.0V, Vss = 0V, T
A
= 25
℃
, Fc = 3.579545 MHz, using
test circuit shown in Figure 2
NOTES
1. dBm = decibels above or below a reference power of 1 mW into a 600 ohm load.
2. Digit sequence consists of all 16 DTMF tones.
3. Tone duration = 40 ms, tone pause = 40 ms.
4. Signal condition consists of nominal DTMF frequencies.
5. Both tones in composite signal have an equal amplitude.
6. Tone pair is deviated by
±
1.5%
±
2 Hz.
7. Bandwidth limited (3 KHz) Gaussian noise.
8. The precise dial tone frequencies are ( 350 Hz and 440 Hz)
±
2%.
9. For an error rate of better than 1 in 10,000.
10. Referenced to lowest level frequency component in DTMF signal.
11. Referenced to the minimum valid accept level.
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