MT88E43BS1 Zarlink, MT88E43BS1 Datasheet - Page 12

• Manufacturer Part Number: MT88E43BS1
• Description: Caller ID CMOS 3.58MHz 3.3V/5V 24-Pin SOIC Tube
• Manufacturer: Zarlink

Specifications of MT88E43BS1

• Package: 24SOIC
• Telecommunication Standards Supported: GR-30|SIN227|SIN242|SR-TSV-002476|TR-NWT-000030
• Fabrication Technology: CMOS
• Maximum Data Rate: 1212 Bd
• Typical Operating Supply Voltage: 3.3|5 V
• Typical Supply Current: 3 mA
• Minimum Operating Temperature: -40 °C
• Maximum Operating Temperature: 85 °C
• Operating Frequency: 3.58 MHz

Crystal Oscillator
The MT88E43 requires a 3.579545MHz crystal oscillator as the master timing source.
The crystal specification is as follows:
Frequency:
Frequency tolerance:
Resonance mode:
Load capacitance:
Maximum series resistance: 150 ohms
Maximum drive level (mW): 2 mW
e.g., CTS MP036S
Any number of MT88E43 devices can be connected as shown in Figure 8 such that only one crystal is required.
The connection between OSC2 and OSC1
can be D.C. coupled as shown, or the OSC1 input on all devices can be driven from a CMOS buffer (dc coupled)
with the OSC2 outputs left unconnected.
To meet BT and Bellcore requirements for proper tone detection the crystal must have a frequency tolerance of
0.1%.
VRef and CAP Inputs
V
capacitor is required between CAP and V
Ref
is the output of a low impedance voltage source equal to V
3.579545 MHz
±0.1%(-40
Parallel
18 pF
OSC1 OSC2
3.579545 MHz
MT88E43
Figure 8 - Common Crystal Connection
o
SS
C+85
to eliminate noise on V
Zarlink Semiconductor Inc.
o
C)
MT88E43B
OSC1 OSC2
MT88E43
12
DD/2
Ref.
and is used to bias the input opamp. A 0.1µF
OSC1 OSC2
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