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參數(shù)資料
| 型號(hào)： | MT88E46 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Bellcore Compliant Calling Number Identification Circuit(兼容貝爾內(nèi)核主叫識(shí)別電路) |
| 中文描述： | 貝爾通訊兼容主叫號(hào)碼識(shí)別電路（兼容貝爾內(nèi)核主叫識(shí)別電路） |
| 文件頁(yè)數(shù)： | 1/25頁(yè) |
| 文件大小： | 111K |
| 代理商： | MT88E46 |
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1
MT88E46
Bellcore Compliant Calling Number
Identification Circuit
Advance Information
Features
Compatible with Bellcore GR-30-CORE,
SR-TSV-002476; TIA/EIA-716 and TIA/EIA-777
Pin compatible with MT88E45
Differential input amplifiers with adjustable
gains for Tip/Ring and 4-wire side connections
TIA (Telecommunications Industry Association)
MEI (Multiple Extension Interworking)
compatible architecture: CAS (CPE Alerting
Signal) detection is selectable between Tip/
Ring and 4-wire side
4-wire side CAS detection is Bellcore talkoff
and talkdown compliant when near end speech
is attenuated 8dB or better, and is close to
talkoff compliant even without near end speech
attenuation
Tip/Ring side CAS detection typically meets
talkdown condition 1 (the average case)
1200 baud Bell 202 and CCITT V.23 FSK
demodulation
Selectable 3-wire FSK data interface (serial bit
stream or 1 byte buffer) with facility to monitor
stop bit for framing error check
FSK carrier detect status output
3 to 5V
±
10% supply voltage
Uses 3.579545MHz crystal
Low power CMOS with power down mode
Applications
Bellcore compliant CIDCW (Calling Identity
Delivery on Call Waiting) and CWD (Call
Waiting Deluxe) telephones
CIDCW and CWD telephone adjunct boxes
Computer Telephony Integrated (CTI) systems
Description
The MT88E46 is a CMOS integrated circuit suitable
for receiving the FSK and CAS signals in North
American (Bellcore) CIDCW, CWD and CID (Calling
Identity Delivery) services. It provides an optimal
solution for the CIDCW (also known as Type 2) and
CWD (Type 2.5) telephone set applications by
providing separate input op-amps for Tip/Ring and 4-
wire side (receive pair of the telephone hybrid or
speech IC) connections. The Tip/Ring connection is
compatible with TIA’s MEI scheme and can be used
for FSK demodulation and ‘on hook mode’ CAS
detection. The 4-wire side connection is for ‘off hook
mode’ CAS detection. The CAS detection modes - on
hook and off hook - use different algorithms which
are optimized for the CPE states. In ‘off hook mode’
the CAS detector is Bellcore compliant when near
end speech is attenuated 8dB or better. ‘On hook
mode’ is optimized for talkdown only and typically
meets talkdown condition 1 (the average case)
without speech attenuation at Tip/Ring such as in the
on hook state MEI CPE.
Figure 1 - Functional Block Diagram
Anti-Alias
Filter
FSK
Bandpass
FSK
Demod
+
-
+
-
Data Timing
Recovery
Carrier
Detector
2130Hz
Bandpass
2750Hz
Bandpass
Tone
Detection
Algorithm
GS1en
GS1en
M
DR
DET
Bias
Generator
Oscillator
Control Bit
Decode
FSKen
CASen
PWDN
IN1+
IN1-
GS1
IN2+
IN2-
GS2
V
REF
OSC1
OSC2
CB0
CB2
CB1
DATA
DCLK
CD
DR/DET
Vdd
Vss
On/Off Hook mode
MODE
MODE
FSKen
CASen
CASen
GS1en
PWDN
PWDN
PWDN
Patent pending
DS5350
ISSUE 1
March 2000
Ordering Information
MT88E46AS
20 Pin SOIC
-40 to +85
°
C
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT88E46_06 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Bellcore Compliant Calling Number Identification Circuit |
| MT88E46AS | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Rail/Tube |
| MT88E46AS1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Rail/Tube |
| MT88E46ASR | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Tape and Reel |
| MT88E46ASR1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Tape and Reel |
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