- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384224 > CM8870CFI DTMF RECEIVER|CMOS|SOP|18PIN|PLASTIC PDF資料下載
參數(shù)資料
| 型號： | CM8870CFI |
| 英文描述： | DTMF RECEIVER|CMOS|SOP|18PIN|PLASTIC |
| 中文描述： | 雙音多頻接收器|的CMOS |專科| 18PIN |塑料 |
| 文件頁數(shù)： | 8/9頁 |
| 文件大?。?/td> | 76K |
| 代理商： | CM8870CFI |
200
1
California Micro Devices Corp. All rights reserved.
12
/
18
/2001
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
8
CM8870/70C
CALIFORNIA MICRO DEVICES
V
DD
V
DD
V
TST
V
DD
C
R
V
C
tGTA = (RC) In
St/GT
ESt
StD
V
DD
V
DD
–
V
TST
tGTP = (RC) In
Figure 4. Basic Steering Circuit
V
DD
V
DD
V
TST
tGTA = (R
P
C) In
R
P
= R
1
R
2
1 +
R
2
V
DD
V
DD
–
V
TST
tGTP = (R
1
C) In
(A.) Decreasing tGTA (tGTP > tGTA)
St/GT
ESt
C
R1
R2
V
DD
V
DD
V
TST
tGTA = (R
1
C) In
R
P
= R
1
R
2
1
+ R
2
VDD
V
DD
–
V
TST
tGTP = (R
P
C) In
(B.) Decreasing tGTP (tGTP < tGTA)
St/GT
ESt
C
R1
R2
Figure 5. Guard Time Adjustment
50
0
X Y
ABC D
FREQUENCY Hz
PRECISE DIAL TONES
X = 350Hz
y = 440Hz
DTMF TONES
A = 607Hz
B = 770Hz
C = 852Hz
D = 841Hz
A
1K
E F
G
H
2K
40
30
20
10
0
E = 1209Hz
F = 1336Hz
G = 1477Hz
H = 1633Hz
Figure 3. Typical Filter Characteristic
C1
+
–
R1
R2
R5
R3
IN+
IN
–
C2
R4
CM8870
C1 = C2 = 10nF
R1 = R4 = R4 =100 K
R2 = 60K
, R3 = 37.5K
All resistors are
–
1% tolerance.
All capacitors are
–
5% tolerance.
(Xxxx) = 2
R2 +
2
VOLTAGE GAIN (Av diff) =
IMPUT IMPEDANCE
R3 =
R2R5
R2 + R5
DIFFERENTIAL INPUT AMPLIFIER
V
REF
GS
R5
R1
1
wC
Figure 6. Differential Input Configuration
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CM8870CD | DTMF Receiver |
| CM8870CDI | DTMF Receiver |
| CM8870CF | DTMF RECEIVER|CMOS|SOP|18PIN|PLASTIC |
| CM8870PEI | DTMF Receiver |
| CM8870S | DTMF Receiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CM8870CI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DTMF Receiver |
| CM8870CP | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:CMOS Integrated DTMF Receiver |
| CM8870CPE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DTMF Receiver |
| CM8870CPEI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DTMF RECEIVER|CMOS|LDCC|20PIN|PLASTIC |
| CM8870CPEI-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DTMF Receiver |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。