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參數(shù)資料
| 型號： | MSM7524 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | DTMF Transceiver(雙音多頻收發(fā)器) |
| 中文描述： | 雙音多頻收發(fā)器（雙音多頻收發(fā)器） |
| 文件頁數(shù)： | 6/21頁 |
| 文件大?。?/td> | 140K |
| 代理商： | MSM7524 |
Semiconductor
MSM7524
6/21
Call progress tone detect.
When the tone is detected, CP shows digital "1" state. Detected call progress
tone frequency and amplitude range are specified as follows.
Frequency; 330 to 640 Hz
Amplitude; 0 to –40 dBm (at GS2)
Digital ground, 0 V.
This pin should be common with AG (pin 8) at the system ground point.
DTMF tone output.
The signal amplitude of the low-group and the high-group tones are
–6.5 dBm and –5.5 dBm at PBTO, respectively, but, the transmit signal
amplitude can be adjusted by applying the on-chip operational amplifier
(III). Refer to Fig. 2.
Make/Break of DTMF tone transmitting is controlled through the
processor interface.
Inverting input and output pins of the on-chip operational amplifier
(III).
The non-inverting input is internally connected to SG. When not
using this amplifier, these pins should be wired to each other.
Special tone detect.
The MSM7524 first version provides this function for 1300 Hz tone
which is well-known for FAX auto-receipt.
When the tone is detected, FX shows digital "1" state.
Detected tone frequency and amplitude range are specified as
follows.
Frequency: 1280 to 1320 Hz
Amplitude: 0 to –34 dBm (at GS3)
When CP is on digital "1" (call progress tone is detected), FX is
forced to be on digital "0" state regardless of the special tone existence.
Pin No.
Name
I/O
22
CP
O
23
DG
—
Description
24
PBTO
O
25
PBA–
I
26
PBAO
O
27
FX
O
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相關(guān)代理商/技術(shù)參數(shù) |
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| MSM7524GS-K | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:DTMF Transceiver |
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| MSM7532GS-2K | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Single Chip MSK Modem with Compandor for Cordless Telephone |
| MSM7533H | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:2ch Single Rail CODEC |
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