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參數(shù)資料
| 型號(hào)： | HM9270C |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | DTMF Receiver(集成了濾波器和數(shù)字譯碼器功能的雙音多頻（DTMF）接收器) |
| 中文描述： | 雙音多頻接收器（集成了濾波器和數(shù)字譯碼器功能的雙音多頻（DTMF）的接收器） |
| 文件頁(yè)數(shù)： | 9/10頁(yè) |
| 文件大?。?/td> | 57K |
| 代理商： | HM9270C |
DTMF RECEIVER
HM 9270C/D
— 9 —
fLow Fhigh Key
697 1209
697 1336
697 1477
770 1209
770 1336
770 1477
852 1209
852 1336
852 1477
941 1336
941 1209
941 1477
697
1633
770 1633
852 1633
941 1633
-
-
TOE Q4
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
Q3
L
L
L
H
H
H
H
L
L
L
L
H
Q2
L
H
H
L
L
H
H
L
L
H
H
L
Q1
H
L
H
L
H
L
H
L
H
L
H
L
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
ANY
L
L
L
L
L
L
L
H
H
H
H
Z
Z
Z
Z
Input Configuration
The input arrangement of the HM9270C/D provides a differential-input operational amplifier as well
as a bias source (V
) which is used to bias the inputs at mid-rail.
Provision is made for connection of a feedback resistor to the op-amp output (GS) for adjustment
of gain. In a single-ended configuration, the input pins are connected as shown in Fig. 2 with the
op-amp connected for unity gain and V
biasing the input at 1/2V
DD
.
Fig. 9 shows the differential configuration, which permits the adjustment of gain with the feedback
resistor R5.
FIGURE 9. DIFFERENTIAL INPUT CONFIGURATION
Power - down and inhibit mode
A logic high applied to pin 6 (PWDN) will power the device to minimize the power consumption in a
standby mode. It stops the oscillator and the functions of the filters.
Inhibit mode is enabled by a logic high input to the pin 5 (INH). It inhibits the detection of 1633 Hz. The
output code will remain the same as the previous detected code (see table 1).
fLow Fhigh Key
697 1209
697 1336
697 1477
770 1209
770 1336
770 1477
852 1209
852 1336
852 1477
941 1336
941 1209
941 1477
697
1633
770 1633
852 1633
941 1633
-
-
TOE Q4
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
Q3
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
L
Z
Q2
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
Z
Q1
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
Z
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
ANY
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
Z
PREVIOUS DATA
Table 1: Truth table
INH =V
SS
(Z: high impedance)
INH=V
DD
C1
R1
C2
R4
R5
GS
R2
R3
V
REF
+
-
HM9270C/D
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HM9270D | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:DTMF RECEIVER |
| HM92M | 制造商:HSMC 制造商全稱:HSMC 功能描述:PNP EPITAXIAL PLANAR TRANSISTOR |
| HM94 | 制造商:HSMC 制造商全稱:HSMC 功能描述:PNP EPITAXIAL PLANAR TRANSISTOR |
| HM965 | 制造商:HSMC 制造商全稱:HSMC 功能描述:NPN EPITAXIAL PLANAR TRANSISTOR |
| HM9-6516BB6129 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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