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參數(shù)資料
| 型號： | MT3170 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Wide Dynamic Range DTMF Receiver |
| 中文描述： | 寬動態(tài)范圍的DTMF接收器 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大小： | 91K |
| 代理商： | MT3170 |
MT3170B/71B, MT3270B/71B, MT3370B/71B
4-6
Serial Data (SD) Output
When a valid DTMF signal burst is present, ESt or
DStD will go high. The application of four clock
pulses on the ACK pin will provide a 4-bit serial
binary code representing the decoded DTMF digit on
the SD pin output. The rising edge of the first pulse
applied on the ACK pin latches and shifts the least
significant bit of the decoded digit on the SD pin.
The next three pulses on ACK pin will shift the
remaining latched bits in a serial format (see Figure
5). If less than four pulses are applied to the ACK
pin, new data cannot be latched even though ESt/
DStD can be valid. Clock pulses should be applied
to clock out any remaining data bits to resume
normal operation. Any transitions in excess of four
pulses will be ignored until the next rising edge of the
ESt/DStD. ACK should idle at logic low. The 4-bit
binary representing all 16 standard DTMF digits are
shown in Table 1.
Powerdown Mode (MT317xB/337xB)
The MT317xB/337xB devices offer a powerdown
function to preserve power consumption when the
device is not in use. A logic high can be applied at
the PWDN pin to place the device in powerdown
mode. The ACK pin should be kept at logic low to
avoid undefined ESt/DStD and SD outputs (see
Table 2).
0= LOGIC LOW, 1= LOGIC HIGH
Table 1. Serial Decode Bit Table
b0=LSB of decoded DTMF digit and shifted out first.
Note:
F
LOW
697
697
697
770
770
770
852
852
852
941
941
941
697
770
852
941
F
HIGH
1209
1336
1477
1209
1336
1477
1209
1336
1477
1336
1209
1477
1633
1633
1633
1633
DIGIT
b
3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
b
2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
b
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
b
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
Table 2. Powerdown Mode
+
=enters powerdown mode on the rising edge.
Table 3. Call Progress Tones
ACK (input)
PWDN (input)
ESt/DStD (output)
SD (output)
MT317xB/337xB
status
low
low
Refer to Fig. 4 for
timing waveforms
low
low
undefined
Refer to Fig. 4 for
timing waveforms
low
undefined
undefined
normal operation
low
high
high
high
+
low
high
powerdown mode
undefined
undefined
Frequency 1 (Hz)
Frequency 2 (Hz)
On/Off
Description
350
425
400
480
440
480
440
480
440
---
---
620
---
620
480
620
continuous
continuous
continuous
0.5s/0.5s
0.5s/0.5s
0.25s/0.25s
2.0s/4.0s
0.25s/0.25s
North American Dial Tones
European Dial Tones
Far East Dial Tones
North American Line Busy
Japanese Line Busy
North American Reorder Tones
North American Audible Ringing
North American Reorder Tones
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT3170B | Wide Dynamic Range DTMF Receiver |
| MT3270 | Wide Dynamic Range DTMF Receiver |
| MT3170B | Wide Dynamic Range DTMF Receiver(50dB的寬動態(tài)范圍雙音多頻信號（DTMF）接收器) |
| MT3171B | Wide Dynamic Range DTMF Receiver(50dB的寬動態(tài)范圍雙音多頻信號（DTMF）接收器) |
| MT3270B | Wide Dynamic Range DTMF Receiver(50dB的寬動態(tài)范圍雙音多頻信號（DTMF）接收器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT3170B | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Wide Dynamic Range DTMF Receiver |
| MT3170BE | 制造商:Microsemi Corporation 功能描述:DTMF RX 4.19MHZ 5V 8PDIP - Rail/Tube |
| MT3170BE1 | 制造商:Microsemi Corporation 功能描述:DTMF RX 4.19MHZ 5V 8PDIP - Rail/Tube |
| MT3171B | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Wide Dynamic Range DTMF Receiver |
| MT3171BE | 制造商:Microsemi Corporation 功能描述: |
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