MT88E43
Vdd
1N4003
R
1
1N4003
IN+
RING / B
Data Sheet
Vdd
R
4
MT88E43
V
DD
St/GT
ESt
StD
INT
CD
DR
DATA
DCLK
FSKen
PWDN
IC
R
2
R
3
1N914
TIP / A
53K6
1N4003
R
1
1N4003
60K4
22nF
5%
Vdd
R
4
C
Vdd
100K
464K
IN-
GS
V
Ref
CAP
TRIGin
20%
Vdd
150K
5%
100nF
10%
220nF
1N5231B
TRIGRC
TRIGout
MODE
100nF
OSCin
OSCout
V
SS
330nF 12K1 Vdd
Motorola
10% 5%
4N25
464K
5%
200K
5%
10nF
NOTE: Resistors must have 1% tolerance, capacitors have 20%
tolerance unless specified otherwise.
: Bridge rectifier diodes are 1N914.
: For BT Application C=0.1µF
±5%,
R
3
=422kΩ
±1%,
R
2
=422kΩ
±1%
:
For applications where CAS speech immunity is required (e.g. CIDCW)
C=0.1µF
±5%,
R
3
=825kΩ
±1%,
R
2
=226kΩ
±1%
: R
1
= 430K, R
4
= 34K for V
DD
= 5V
±
10% (See Figure 10)
: R
1
= 620K, R
4
= 63K4 for V
DD
= 3V
±
10% (See Figure 10)
= To microcontroller
= From microcontroller
(FSK Interface Mode 0 selected)
Figure 11 - Application Circuit with Improved Common Mode Noise Immunity and Isolation in
Line Interface
A
pprovals
FCC Part 68, DOC CS-03, UL 1459, and CAN/CSA-
22.2 No. 225-M90 are all system (i.e. connectors,
power supply, cabinet, etc.) requirements. Since the
MT88E43 is a component and not a system, the
application circuit (Figure 11) has been designed to
meet the CO Trunk interface requirements of FCC,
DOC, UL, and CSA; thus enabling the complete
system to be approved by these standards bodies.
Products are designed in accordance with meeting
the above requirements; however, full conformance
to these standards is dependent upon the application
in which the MT88E43 is being used, and therefore,
approvals are the responsibility of the customer and
Zarlink will not have tested the product to meet the
above standards.
5-64
100nF
22nF
5%
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
