MT8841AE Mitel, MT8841AE Datasheet

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MT8841AE

Manufacturer Part Number
MT8841AE
Description
Calling number identification circuit. Applications: calling number delivery (CND), calling name delivery (CNAM) and calling identify on call waiting (CIDCW) features of Bellcore CLASS service, feature phones, phone set adjunct boxes, FAX machines
Manufacturer
Mitel
Datasheet
1.MT8841AE.pdf (10 pages)

Available stocks

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Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
MT8841AE
Manufacturer:
MITEL
Quantity:
20 000
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H&T Electronics H&T Electronics
Part Number:
MT8841AE
Quantity:
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Features
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Applications
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CLASS
CAP
V
1200 baud BELL 202 and CCITT V.23
Frequency Shift Keying (FSK) demodulation
Compatible with Bellcore TR-NWT-000030 and
SR-TSV-002476
High input sensitivity: -36dBm
Simple serial 3-wire data interface eliminating
the need for a UART
Power down mode
Internal gain adjustable amplifier
Carrier detect status output
Uses 3.579545 MHz crystal or ceramic
resonator
Single 5V power supply
Low power CMOS technology
Calling Number Delivery (CND), Calling Name
Delivery (CNAM) and Calling Identity on Call
Waiting (CIDCW) features of Bellcore CLASS
service
Feature phones
Phone set adjunct boxes
FAX machines
Telephone Answering machines
Database query systems
IN+
GS
IN-
Ref
SM
is a service mark of Bellcore
+
-
Generator
PWDN
Bias
Bandpass
Receive
Filter
Figure 1 - Functional Block Diagram
OSC1 OSC2
Generator
Clock
SM
Demodulator
Calling Number Identification Circuit
Description
The MT8841 Calling Number Identification Circuit
(CNIC) is a CMOS integrated circuit providing an
interface to various calling line information delivery
services that utilize 1200 baud BELL 202 or CCITT
V.23 FSK voiceband data transmission schemes.
The CNIC receives and demodulates the signal and
outputs data into a simple 3-wire serial interface.
Typically, the
information on the calling line is sent before alerting
the called party or during the silent interval between
the first and second ring using either CCITT V.23
recommendations or Bell 202 specifications.
The CNIC accepts and demodulates both CCITT
V.23 and BELL 202 signals. Along with serial data
and clock, the CNIC provides a data ready signal to
indicate the reception of every 8-bit character sent
from the Central Office. The received data can be
processed externally by a microcontroller, stored in
memory, or displayed as is, depending on the
application.
FSK
MT8841AE
MT8841AS
MT8841AN
to other
circuits
Detector
Carrier
FSK modulated data containing
Ordering Information
-40 °C to +85 °C
V
SS
16 Pin Plastic DIP
16 Pin SOIC
20 Pin SSOP
ISSUE 4
Data and Timing
V
DD
CMOS
Recovery
IC1
IC2
MT8841
DATA
DR
DCLK
CD
May 1995
5-11

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MT8841AE Summary of contents

Page 1

... Generator Ref PWDN SM CLASS is a service mark of Bellcore Calling Number Identification Circuit MT8841AE MT8841AS MT8841AN Description The MT8841 Calling Number Identification Circuit (CNIC CMOS integrated circuit providing an interface to various calling line information delivery services that utilize 1200 baud BELL 202 or CCITT V ...

Page 2

MT8841 1 IN VRef 4 5 CAP OSC1 6 OSC2 7 VSS 8 16 PIN PLASTIC DIP/SOIC Pin Description Pin # Name IN+ Non-inverting Op-Amp (Input IN- Inverting Op-Amp (Input). ...

Page 3

Functional Description The MT8841 Calling Number Identification Circuit (CNIC device compatible with the Bellcore proposal (TR-NWT-000030) on generic requirements for transmitting asynchronous voiceband data to Customer Premises Equipment (CPE) from a serving Stored Program Controlled Switching (SPCS) or ...

Page 4

MT8841 edge corresponds to the centre of each DATA bit cell (providing the incoming baud rate matches the DCLK rate). DCLK is not generated for the stop and start bits. Consequently, DCLK will clock only valid data into a peripheral ...

Page 5

Applications The circuit shown in Figure 6 illustrates the use of the MT8841 device in a typical FSK receiver system. Bellcore Special Report SR-TSV-002476 specifies that the FSK receiver should be able to receive FSK signal levels as follows: Received ...

Page 6

MT8841 Absolute Maximum Ratings Parameter 1 DC Power Supply Voltage Voltage on any pin 3 Current at any pin (except Storage Temperature 5 Package Power Dissipation * Exceeding these values may cause permanent damage. ...

Page 7

Electrical Characteristics - Gain Setting Amplifier Characteristics 1 Input Leakage Current 2 Input Resistance 3 Input Offset Voltage 4 Power Supply Rejection Ratio 5 Common Mode Rejection 6 DC Open Loop Voltage Gain 7 Unity Gain Bandwidth 8 Output ...

Page 8

MT8841 AC Electrical Characteristics Characteristics 1 Power-up time PWDN OSC1 2 Power-down time 3 Input FSK to CD low delay 4 Input FSK to CD high delay CD 5 Hysteresis 6 Rate DATA 7 Input FSK to DATA delay 8 ...

Page 9

TIP/RING First Ringing PWDN t PU OSC2 CD * DATA High (Input Idle) DCLK with external pull-up resistor Figure 9 - Input and Output Timing (Bellcore CND Service) start stop TIP/RING ...

Page 10

MT8841 NOTES: 5-20 ...

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