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參數資料
| 型號： | MT88E46AS1 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Bellcore Compliant Calling Number Identification Circuit |
| 中文描述： | 貝爾通訊兼容主叫號碼識別電路 |
| 文件頁數： | 1/23頁 |
| 文件大小： | 416K |
| 代理商： | MT88E46AS1 |
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2000-2006, Zarlink Semiconductor Inc. All Rights Reserved.
MT88E46
Bellcore Compliant Calling Number
Identification Circuit
Data Sheet
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 8 dB 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 5 V
±
10% supply voltage
Uses 3.579545 MHz 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
November 2006
Ordering Information
MT88E46AS
MT88E46ASR
MT88E46AS1
20 Pin SOIC
20 Pin SOIC
20 Pin SOIC*
Tubes
Tape & Reel
Tubes, Bake &
Drypack
Tape & Reel,
Bake & Drypack
MT88E46ASR1
20 Pin SOIC*
*Pb Free Matte Tin
-40 to +85
°
C
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相關代理商/技術參數 |
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| MT88E46ASR | 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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