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參數(shù)資料
| 型號(hào)： | MT3371BS |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 信令電路 |
| 英文描述： | Wide Dynamic Range DTMF Receiver |
| 中文描述： | TELECOM, DTMF SIGNALING CIRCUIT, PDSO18 |
| 封裝： | 0.300 INCH, MS-013AB, SOIC-18 |
| 文件頁(yè)數(shù)： | 3/15頁(yè) |
| 文件大?。?/td> | 485K |
| 代理商： | MT3371BS |
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MT3170B/71B, MT3270B/71B, MT3370B/71B
Data Sheet
3
Zarlink Semiconductor Inc.
Functional Description
The MT3x7xBs are high performance and low power consumption DTMF receivers. These devices provide wide
dynamic range DTMF detection and a serial decoded data output. These devices also incorporate an energy
detection circuit. An input voiceband signal is applied to the devices via a series decoupling capacitor. Following the
unity gain buffering, the signal enters the AGC circuit followed by an anti-aliasing filter. The bandlimited output is
routed to a dial tone filter stage and to the input of the energy detection circuit. A bandsplit filter is then used to
separate the input DTMF signal into high and low group tones. The high group and low group tones are then
verified and decoded by the internal frequency counting and DTMF detection circuitry. Following the detection
stage, the valid DTMF digit is translated to a 4-bit binary code (via an internal look-up ROM). Data bits can then be
shifted out serially by applying external clock pulses.
Automatic Gain Control (AGC) Circuit
As the device operates on a single power supply, the input signal is biased internally at approximately VDD/2. With
large input signal amplitude (between 0 and approximately -30 dBm for each tone of the composite signal), the
15
7
7
ESt
(MT3x70B)
DStD
(MT3x71B)
Early Steering Output.
A logic high on ESt indicates that a DTMF
signal is present. ESt is at logic low in powerdown state.
Delayed Steering Output.
A logic high on DStD indicates that a
valid DTMF digit has been detected. DStD is at logic low in
powerdown state.
Positive Power Supply (5 V Typ.)
Performance of the device can
be optimized by minimizing noise on the supply rails. Decoupling
capacitors across V
DD
and V
SS
are therefore recommended.
No Connection.
Pin is unconnected internally.
18
8
8
V
DD
1,5,7,8,
10, 12,
14,16,
17
3
-
-
NC
-
2
PWDN
Power Down Input.
A logic high on this pin will power down the
device to reduce power consumption. This pin is pulled down
internally and can be left open if not used. ACK pin should be at logic
’0’ to power down device.
Summary of MT3x70/71B Product Family
Device
Type
8 Pin
18 Pin
20 Pin
PWDN
2 Pin
OSC
Ext
CLK
ESt
DStD
MT3170B
MT3171B
MT3270B
MT3271B
MT3370B
MT3371B
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
Pin Description
Pin #
327xB
Name
Description
337xB
317xB
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT3371BS1 | 制造商:Microsemi Corporation 功能描述:DTMF RX 4.19MHZ 5V 18SOIC - Rail/Tube 制造商:Microsemi Corporation 功能描述:PB FREE SER.PORT DTMF RX.PWD.2PIN4.19MHZ |
| MT3371BSR | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Wide Dynamic Range DTMF Receiver |
| MT3371BSR1 | 制造商:Microsemi Corporation 功能描述:DTMF RX 4.19MHZ 5V 18SOIC - Tape and Reel |
| MT338024 | 功能描述:通用繼電器 Relays Power, Over 2 Amps - RELAY GP 3PDT 10A 24VAC LED RoHS:否 制造商:Omron Electronics 觸點(diǎn)形式:1 Form A (SPST-NO) 觸點(diǎn)電流額定值:150 A 線圈電壓:24 VDC 線圈電阻:144 Ohms 線圈電流:167 mA 切換電壓:400 V 安裝風(fēng)格:Chassis 觸點(diǎn)材料: |
| MT338115 | 制造商:TE Connectivity 功能描述:RELAY, MULTIMODE, 115 VAC, 3 CO CONTACTS, GOLD PLATED, 11 PIN, W/ LED AND TEST B |
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