SC88E43 Datasheet, PDF (18/25 Pages) List of Unclassifed Manufacturers – EXTENDED VOLTAGE CALLING NUMBER IDENTIFICATION CIRCUIT 2

Silan
Semiconductors
SC88E43
TIP /A
TISP
4180
RING / B
VDD
1N4003
R1
R4
22nF
5%
1N4003
VDD
1N4003
R1
R4
22nF
5%
1N4003
VDD
100nF
10%
330nF
10%
12K1
5%
4N25
VDD
1N914 X 4
VDD
200K
5%
464K
5%
10nF
1 IN+
VDD 24
2 IN-
464K
3 GS
St/GT 23
ESt 22
4 Vref
StD 21
5 CAP
INT 20
6 TRIGin
CD 19
7 TRIGRC
DR 18
8 TRIGout DATA 17
9 MODE DCLK 16
10 OSCin FSKen 15
11 OSCout PWDN 14
12 VSS
IC 13
SC88E43
VDD
C
R3
R2
1N914
100nF
VDD
100K
20%
Note: Please use 0.068µF, 1500pF Mylar Capacitors.
Note:Resistors must have 1% tolerance and capacitors have 20% tolerance unless otherwise specified.
Crystal is 3.579545MHz, 0.1% frequency tolerance.
For BT Application C=0.1­Ff5%, R3=422k¡f1%, R2=422k¡f1%.
For Applications where CAS speech immunity is required(e.g.CIDCW), C=0.1­Ff5%, R3=825k¡f1%, R2=226k¡
f1%.
R1=430k, R4=34k for VDD=5Vf10% (See Figure 10)
R1=620k, R4=63k4 for VDD=3Vf10% (See Figure 10)
Figure 11:Application Circuit with Improved Common Mode Noise Immunity and Isolation in Line Interface
Approvals
Fcc Part 68,DOC CS-03,UL1459,and CAN/CSA-22.2 No.225-M90 are all system(i.e. connectors,power
supply,cabinet,ect.) requirements. Since the SC88E43 is a component and not a system, the application circuit
(Figure 11) has been designed to meet the CO Trunk interface requirments of FCC,DOC,UL, and CSA; thus
enabling the complete system to be approved by these standards bodies.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
18