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參數(shù)資料
| 型號(hào)： | FX623P |
| 廠(chǎng)商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Call Progress Tone Decoder |
| 中文描述： | 呼叫進(jìn)展音解碼器 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大?。?/td> | 49K |
| 代理商： | FX623P |
3
Application Information
V
DD
V
DD
C
1
R
1
C
4
X
1
R
2
C
3
C
2
V
SS
V
SS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
FX623P
XTAL/CLOCK
P U R S
DATA CHANGE
SIGNAL IN
COMPOSITE SIGNAL IN
A HEX Code
Output representing
the decoded tone
frequency
See Table 1
DATA OUTPUTS
Q3
Q0
Q1
Q2
V
SS
C
5
XTAL
HOLD
IRQ
CS
Fig.2 Recommended External Components
Band Edges (Hz)
Lower
Edge
Nominal
Centre
Freq.
Hex
Output Code
Upper
Edge
Character Q3 Q2 Q1 Q0
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
364
488
520
580
386
412
436
463
900
1273
1350
1750
2062
386
520
580
618
412
436
463
487
1008
1325
1455
1855
2140
375
500
550
600
400
425
450
475
950
1300
1400
1800
2100
frequency not guaranteed
frequency not guaranteed
N
OTONE
Table 1 Tone Decode Frequencies
Timing Information
With CS Low - Figure 3.
After initial power-up and the Hold input inactive
(High), as frequencies are input, with the Data Change
output as an active (High) indicator, the data is
presented at the Data Outputs.
If/when the Hold input is placed active (Low), the
data at the Data Outputs is frozen and the Data
Change output held High at its next active excursion -
until the Hold input is returned High.
With the Hold input held High - Figure 4.
As frequencies are input a correct decode will
produce an active (Low) interrupt level.
This interrupt (IRQ) is serviced and reset by an
active (Low) CS input.
Note the ‘valid data’ period at the Data Outputs.
Component
Value
R
1
R
2
C
1
C
2
C
3
C
4
C
5
X
1
1.0M
1.0M
47.0nF
4.7nF
33.0pF
33.0pF
1.0μF
3.579545MHz
C = ±20%
Tolerances R = ±10%
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