欢迎访问ic37.com |
会员登录 免费注册
发布采购

MT8880CS-1 参数 Datasheet PDF下载

MT8880CS-1图片预览
型号: MT8880CS-1
PDF下载: 下载PDF文件 查看货源
内容描述: ISO2 -CMOS集成DTMFTransceiver [ISO2-CMOS Integrated DTMFTransceiver]
分类和应用:
文件页数/大小: 18 页 / 315 K
品牌: MITEL [ MITEL NETWORKS CORPORATION ]
 浏览型号MT8880CS-1的Datasheet PDF文件第2页浏览型号MT8880CS-1的Datasheet PDF文件第3页浏览型号MT8880CS-1的Datasheet PDF文件第4页浏览型号MT8880CS-1的Datasheet PDF文件第5页浏览型号MT8880CS-1的Datasheet PDF文件第7页浏览型号MT8880CS-1的Datasheet PDF文件第8页浏览型号MT8880CS-1的Datasheet PDF文件第9页浏览型号MT8880CS-1的Datasheet PDF文件第10页  
MT8880C/MT8880C-1 ISO2-CMOS  
EVENTS  
A
B
C
D
E
F
tREC  
tID  
tDO  
tREC  
TONE  
#n + 1  
TONE  
#n + 1  
TONE #n  
Vin  
tDA  
tDP  
ESt  
tGTP  
tGTA  
VTSt  
St/GT  
tPStRX  
RX0-RX3  
b3  
DECODED TONE # (n-1)  
# (n + 1)  
# n  
tPStb3  
b2  
Read  
Status  
Register  
IRQ/CP  
Figure 9 - Receiver Timing Diagram  
column tones which are then mixed using a low  
noise summing amplifier. The oscillator described  
needs no “start-up” time as in other DTMF  
generators since the crystal oscillator is running  
continuously thus providing a high degree of tone  
of time segments is fixed at 32, however, by varying  
the segment length as described above the tone  
output signal frequency will be varied. The divider  
output clocks another counter which addresses the  
sinewave lookup ROM.  
burst accuracy.  
A
bandwidth limiting filter is  
incorporated and serves to attenuate distortion  
products above 8 kHz. It can be seen from Figure 10  
that the distortion products are very low in amplitude.  
The lookup table contains codes which are used by  
the switched capacitor D/A converter to obtain  
discrete and highly accurate DC voltage levels. Two  
identical circuits are employed to produce row and  
Scaling Information  
10 dB/Div  
Start Frequency = 0 Hz  
Stop Frequency = 3400 Hz  
Marker Frequency = 697 Hz and  
1209 Hz  
Figure 10 - Spectrum Plot  
4-38