MT88E43BSR1 Zarlink, MT88E43BSR1 Datasheet - Page 13

• Manufacturer Part Number: MT88E43BSR1
• Description: Caller ID CMOS 3.58MHz 3.3V/5V 24-Pin SOIC T/R
• Manufacturer: Zarlink

Specifications of MT88E43BSR1

• 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

Application Circuits
The circuits shown in Figures 9 and 11 are application circuits for the MT88E43. As supply voltage (V
decreased, the threshold of the device’s tone and FSK detectors will be reduced. Therefore, to meet the BT or
Bellcore tone reject level requirements the gain of the internal opamp should be reduced according to the graph in
Figure 10. For example when V
V
9 and 11.
The circuit shown in Figure 9 illustrates the use of the MT88E43 in a proprietary system that doesn’t need to meet
FCC, DOC, and UL approvals. It should be noted that if glitches on the tip/ring interface are of sufficient amplitude,
the circuit will falsely detect these signals as ringing or line reversal.
The circuit shown in Figure 11 will provide common mode rejection of signals received by the ringing circuit. This
circuit should pass safety related tests specified by FCC Part 68, DOC CS-03, UL 1459, and CSA C22.2.
safety tests will simulate high voltage faults that may occur on the line. The circuit provides isolation from these high
voltage faults via R1 and the 12 k1Ω resistors as well as the 22 nF & 330 nF capacitors.
resistor (part number GS3) that should be used for R1. This resistor is a 3 W, 5%, 1 kV power resistor. The 12 k1
resistor is manufactured by IRC (part number FA8425F). This resistor is a 1.5 W, 5%, fuseable type resistor. The
22 nF and 330 nF capacitors have a 400 V rating.
See the application note "MSAN-164: Applications of the MT8843 Calling Number Identification Circuit 2" for
information on designing the MT88E43 into CID and CIDCW systems.
TIP / A
RING / B
DD
NOTE: Resistors must have 1% tolerance and capacitors have 20%
=3V (+/- 10%) R
: For applications where CAS speech immunity is required (e.g. CIDCW)
: R
: R
: Crystal is 3.579545MHz, 0.1% frequency tolerance.
: For BT Application C=0.1µF ±5%, R
C=0.1µF ±5%, R
1
1
tolerance unless otherwise specified.
= 430K, R
= 620K, R
TISP4180,
TISP5180,
TPA150A12 or
TPB150B12
4
4
= 34K for V
= 63K4 for V
1
100nF
3
100nF
should equal 620 kΩ and R
22nF
5%
=825kΩ ±1%, R
5%
22nF
5%
5%
499K, 5%
499K, 5%
1N914
DD
DD
R
R
= 5V ± 10% (See Figure 10)
1
1
DD
1N914
= 3V ± 10% (See Figure 10)
2
=226kΩ ±1%
=5V (+/- 10%), R
3
1N914
=422kΩ ±1%, R
1N4003
1N4003
1N4003
1N4003
1N914
301K
200K
5%
5%
Figure 9 - Application Circuit
Vdd
Vdd
Zarlink Semiconductor Inc.
Vdd
4
MT88E43B
R
R
Vdd
should equal 63.4 kΩ. Resistors R
4
4
2
=422kΩ ±1%
220nF
150K
1
5%
13
should equal 430 kΩ and R
100nF
464K
V
MODE
IN+
IN-
GS
CAP
TRIGin
OSCin
OSCout
V
TRIGRC
TRIGout
Ref
SS
MT88E43
(FSK Interface Mode 0 selected)
1
4
and R
should equal 34 kΩ; and if
FSKen
PWDN
DATA
DCLK
St/GT
V
= To microcontroller
= From microcontroller
ESt
INT
CD
DR
DD
StD
IC
4
are shown in Figures
IRC manufactures a
R
R
3
2
C
Data Sheet
Vdd
1N914
Vdd
These
DD
100K
20%
) is