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參數(shù)資料
| 型號： | MT88E43B |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Extended Voltage Calling Number Identification Circuit (ECNIC)(擴展電壓主叫識別電路（接收傳送的物理層信號）) |
| 中文描述： | 擴展電壓主叫號碼識別電路（ECNIC）（擴展電壓主叫識別電路（接收傳送的物理層信號）） |
| 文件頁數(shù)： | 3/27頁 |
| 文件大?。?/td> | 180K |
| 代理商： | MT88E43B |
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Preliminary Information
MT88E43B
55
18
DR
3-wire Interface: Data Ready (CMOS Output)
. Active low. In mode 0 this output goes low after
the last DCLK pulse of each data word. This identifies the 8-bit word boundary on the serial
output stream. Typically, DR is used to latch 8-bit words from a serial-to-parallel converter into a
microcontroller. In mode 1 this pin will signal the availability of data.
19
CD
Carrier Detect (CMOS Output)
. Active low. A logic low indicates the presence of in-band signal
at the output of the FSK bandpass filter.
20
INT
Interrupt (Open Drain Output)
. Active low. It is active when TRIGout or DR is low, or StD is
high. This output stays low until all three signals have become inactive.
21
StD
Dual Tone Alert Signal Delayed Steering Output (CMOS Output)
. When high, it indicates
that a guard time qualified alert signal has been detected.
22
ESt
Dual Tone Alert Signal Early Steering Output (CMOS Output)
. Alert signal detection output.
Used in conjunction with St/GT and external circuitry to implement the detect and non-detect
guard times.
23
St/GT
Dual Tone Alert Signal Steering Input/Guard Time (Analog Input/CMOS Output)
.
A voltage greater than V
TGt
(see figure 4) at the St/GT pin causes the device to indicate that a
dual tone has been detected by asserting StD high. A voltage less than V
TGt
frees the device to
accept a new dual tone.
24
V
DD
Positive Power Supply
.
Pin Description
Pin #
Name
Description
Functional Overview
The MT88E43B is compatible with the caller ID
specifications of BT, the U.K.’s CCA and Bellcore. As
shown in Figure 1, the MT88E43B provides an FSK
demodulator and a CAS/BT Tone Alert Signal
detector. A 3-wire FSK data interface provides two
modes of operation - a mode whereby data transfer
is initiated by the device and a mode whereby data
transfer is initiated by an external microcontroller.
The MT88E43B also provides line reversal detection
and ring detection.
BT specifications SIN227 and SIN242 describe the
signalling mechanism between the network and the
Terminal Equipment (TE) for the Caller Display
Service (CDS). CDS provides Calling Line Identity
Presentation (CLIP), which delivers to an on hook
(idle state) TE the identity of an incoming caller
before the first ring.
An incoming CDS call is indicated by a polarity
reversal on the A and B wires (see Figure 3),
followed by an Idle State Tone Alert Signal. Caller ID
information is then transmitted in CCITT v.23 format
FSK. The MT88E43B can detect the line reversal,
tone alert signal, and demodulate the incoming FSK
signal.
The U.K.’s CCA specification TW/P&E/312 proposes
an alternate CDS TE interface. According to TW/
P&E/312, data is transmitted after a single burst of
ringing rather than before the first ringing cycle (as
specified in the BT standards). The Idle State Tone
Alert Signal is not required as it is replaced by a
single ring burst. The MT88E43B has the capability
to detect the ring burst. It can also demodulate the
Bell 202 or CCITT v.23 FSK following the ring burst.
The U.K.’s CCA specifies that data can be
transmitted in either format.
Bellcore specification GR-30-CORE is the generic
requirement
for
transmitting
voiceband data to Customer Premises Equipment
(CPE).
Another
Bellcore
SR-TSV-002476 describes the same requirements
from the CPE’s perspective. The data transmission
technique specified in both documents is applicable
in a variety of services like Calling Number Delivery
(CND), Calling Name Delivery (CNAM) and Calling
Identity Delivery on Call Waiting (CIDCW) - services
promoted by Bellcore.
asynchronous
specification
In CND/CNAM service, information about a calling
party is embedded in the silent interval between the
first and second ring burst. The MT88E43B detects
the first ring burst and can then be setup to receive
and demodulate the incoming Bell 202 FSK data.
The device will output the demodulated data onto a
3-wire serial interface.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT88E43BE | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43BS | 制造商:Microsemi Corporation 功能描述: |
| MT88E43BS1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 24SOIC - Rail/Tube 制造商:Microsemi Corporation 功能描述:CALLING NUMBER ID CIRCUIT 2 |
| MT88E43BSR | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43BSR1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 24SOIC - Tape and Reel 制造商:Microsemi Corporation 功能描述:PB FREE CALLING NUMBER ID CIRCUIT 2 |
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