MT88E43B
Data Sheet
Vdd
Vdd
1N4003
22nF
5%
R
4
TIP / A
MT88E43
R
1N4003
1
V
IN+
IN-
GS
DD
Vdd
C
Vdd
St/GT
22nF
5%
R
464K
3
100K
R
4
1N4003
1N4003
RING / B
ESt
StD
INT
20%
1N914
R
2
V
R
Ref
1
CAP
CD
DR
TRIGin
Vdd
TRIGRC
TRIGout
150K
5%
DATA
100nF
10%
DCLK
MODE
OSCin
FSKen
1N5231B
PWDN
IC
OSCout
12K1
330nF
10%
Vdd
V
200K
5%
SS
Motorola
4N25
5%
10nF
464K
5%
NOTE: Resistors must have 1% tolerance, capacitors have 20%
tolerance unless specified otherwise.
= To microcontroller
= From microcontroller
(FSK Interface Mode 0 selected)
: Bridge rectifier diodes are 1N914.
: For BT Application C=0.1µF ±5%, R =422kΩ ±1%, R =422kΩ ±1%
3
2
: For applications where CAS speech immunity is required (e.g. CIDCW)
C=0.1µF ±5%, R =825kΩ ±1%, R =226kΩ ±1%
3
2
: R1 = 430K, R4 = 34K for V
= 5V ± 10% (See Figure 10)
DD
: R1 = 620K, R4 = 63K4 for V
= 3V ± 10% (See Figure 10)
DD
Figure 11 - Application Circuit with Improved Common Mode Noise Immunity and Isolation in
Line Interface
Approvals
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.
15
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
