MT88E45BS1 Zarlink, MT88E45BS1 Datasheet - Page 2

• Manufacturer Part Number: MT88E45BS1
• Description: Caller ID CMOS 3.58MHz 3.3V 20-Pin SOIC Tube
• Manufacturer: Zarlink

Specifications of MT88E45BS1

• Package: 20SOIC
• Telecommunication Standards Supported: ANSI/TIA/EIA-716|ETSI/ETS 300 778-1|GR-30|SIN227|SIN242|SR-TSV-002476|TIA/EIA-777
• Fabrication Technology: CMOS
• Maximum Data Rate: 1212 Bd
• Typical Operating Supply Voltage: 3.3 V
• Typical Supply Current: 2.8 mA
• Minimum Operating Temperature: -40 °C
• Maximum Operating Temperature: 85 °C
• Operating Frequency: 3.58 MHz

Features
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Applications
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Compatible with:
Bellcore ‘CPE Alerting Signal’ (CAS), ETSI ‘Dual
Tone Alerting Signal’ (DT-AS), BT Idle State and
Loop State ‘Tone Alert Signal’ detection
1200 baud Bell 202 and CCITT V.23 FSK
demodulation
Separate differential input amplifiers with
adjustable gain for Tip/Ring and telephone hybrid
or speech IC connections
Selectable 3-wire FSK data interface (bit stream
or 1 byte buffer)
Facility to monitor the stop bit for framing error
check
FSK Carrier detect status output
3 to 5V +/- 10% supply voltage
Uses 3.579545MHz crystal or ceramic resonator
Low power CMOS with power down
Bellcore CID (Calling Identity Delivery) and
CIDCW (Calling Identity Delivery on Call
Waiting) telephones and adjuncts
ETSI, BT CLIP (Calling Line Identity
Presentation) and CLIP with Call Waiting
telephones and adjuncts
Fax and answering machines
Computer Telephony Integration (CTI) systems
• Bellcore GR-30-CORE, SR-TSV-002476,
• ETSI ETS 300 778-1 (FSK only variant) & -2;
• BT (British Telecom) SIN227 & SIN242
IN1+
IN1-
GS1
IN2+
IN2-
GS2
V
ANSI/TIA/EIA-716, draft TIA/EIA-777;
REF
OSC1
+
+
-
-
Bias
Generator
Oscillator
FSKen+Tip/Ring CASen
PWDN
PWDN
PWDN
OSC2
Hybrid CASen
MODE
FSKen
CB0
Anti-Alias
Filter
Control Bit
Decode
PWDN
CB1
Figure 1 - Functional Block Diagram
CASen
PWDN
CB2
4-Wire Calling Number Identification Circuit 2
FSK
Bandpass
2130Hz
Bandpass
2750Hz
Bandpass
Advance Information
FSKen
CASen
CASen
Description
The MT88E45 is a low power CMOS integrated circuit
suitable for receiving the physical layer signals used
in North American (Bellcore) Calling Identity Delivery
on Call Waiting (CIDCW) and Calling Identity Delivery
(CID) services. It is also suitable for ETSI and BT
Calling Line Identity Presentation (CLIP) and CLIP
with Call Waiting services.
The MT88E45 contains a 1200 baud Bell 202/CCITT
V.23 FSK demodulator and a CAS/DT-AS detector.
Two input op-amps allow the MT88E45 to be
connected to both Tip/Ring and the telephone hybrid
or speech IC receive pair for optimal CIDCW
telephone
demodulation is always on Tip/Ring, while CAS
detection can be on Tip/Ring or Hybrid Receive. Tip/
Ring CAS detection is required for Bellcore’s
proposed Multiple Extension Interworking (MEI) and
BT’s on-hook CLIP. A selectable FSK data interface
allows the data to be processed as a bit stream or
extracted from a 1 byte on chip buffer. Power
management has been incorporated to power down
the FSK or CAS section when not required. Full chip
power down is also available. The MT88E45 is
suitable for applications using a fixed power source
(with a +/-10% variation) between 3 and 5V.
DS5143
FSK
Demodulator
Tone
Detection
Algorithm
Carrier
Detector
MT88E45AS
MT88E45AN
architectural
Ordering Information
-40 C to 85 C
Data Timing
Recovery
Guard
Time
MODE
ISSUE 3
STD
DR
20 Pin SOIC
20 Pin SSOP
(4-Wire CNIC2)
implementation.
MT88E45
DATA
DCLK
CD
DR/STD
ST/GT
EST
Vdd
Vss
September 2001
FSK
1