CTS - Dual
Terminator
Standard CTS
(Schematic 5) Dual Terminator networks contain (2N-2) resistors
of two different values with each resistor value connected to a
common buss. CTS assigns the resistance value portion of the
standard part numbers of the dual terminator network in two
different methods.
The Series 750, 760 and 770 part number includes the actual
values of the resistors in the dual terminator.
|
Examples: |
| 75085R220/330 |
R1=220 Ohm |
R2=330 Ohm |
| 7605R330/470 |
R1=330 Ohm |
R2=470 Ohm |
| 770105180/470 |
R1=180 Ohm |
R2=470 Ohm |
The Series 752, 766, 767 and
768 part number includes the EIA Code value of the Thevenin
equivalent resistances of R1 and R2. The Thevenin equivalent
resistance is calculated in the following way: The suffix letter
relates only to the sequence of variations which equal the same
equivalent resistance. Reference chart.
Req=R1R2/(R1
+ R2)
|
Examples: |
| 766165131A |
R1=220 Ohms |
R2=330 Ohms |
Req=132 Ohms |
| 767145191A |
R1=330 Ohms |
R2=470 Ohms |
Req=194 Ohms |
| 768205131C |
R1=180 Ohms |
R2=470 Ohms |
Req=130 Ohms |
Pin N/2 is common to R2 and
Pin #N is common to R1 on CTS Series 760, 766, 767 and 768.
Pin 1 is common to R2 and Pin
N is common to R1 on all CTS Series 750, 752, 770 dual terminator
schematics.
|
R1
Ohms> |
R2
Ohms |
Thevenin
Equivalent |
CTS
Code |
|
25 |
50 |
17 ohm |
150A |
|
30 |
50 |
19 ohm |
190A |
|
30 |
620 |
29 ohm |
290A |
|
33 |
4.7K |
33 ohm |
330A |
|
36 |
620 |
34 ohm |
340A |
|
43 |
620 |
40 ohm |
400A |
|
68 |
189 |
50 ohm |
500B |
|
75 |
620 |
67 ohm |
670A |
|
80 |
220 |
59 ohm |
590A |
|
81 |
130 |
50 ohm |
500A |
|
81 |
2.2K |
78 ohm |
780A |
|
100 |
200 |
67 ohm |
670B |
|
100 |
430 |
81 ohm |
810A |
|
100 |
150 |
60 ohm |
600A |
|
106 |
169 |
65 ohm |
650A |
|
110 |
220 |
73 ohm |
730A |
|
118 |
178 |
71 ohm |
710A |
|
120 |
200 |
75 ohm |
750B |
|
120 |
180 |
72 ohm |
720A |
|
120 |
120 |
60 ohm |
600B |
|
150 |
150 |
75 ohm |
750A |
|
160 |
260 |
99 ohm |
990A |
|
160 |
240 |
96 ohm |
960A |
|
160 |
270 |
100 ohm |
101D |
|
162 |
260 |
100 ohm |
101B |
|
180 |
300 |
113 ohm |
111B |
|
180 |
470 |
130 ohm |
131C |
|
180 |
390 |
123 ohm |
121A |
|
180 |
270 |
108 ohm |
111A |
|
180 |
220 |
99 ohm |
101A |
|
200 |
1.5K |
176 ohm |
171D |
|
220 |
330 |
132 ohm |
131A |
|
220 |
270 |
121 ohm |
121B |
|
220 |
220 |
110 ohm |
111D |
|
240 |
170 |
100 ohm |
101C |
|
240 |
620 |
173 ohm |
171C |
|
250 |
250 |
125 ohm |
131B |
|
270 |
470 |
171 ohm |
171A |
|
270 |
180 |
108 ohm |
111C |
|
271 |
131 |
88 ohm |
880A |
|
330 |
470 |
194 ohm |
191A |
|
330 |
680 |
222 ohm |
221A |
|
330 |
390 |
179 ohm |
181A |
|
330 |
220 |
132 ohm |
131D |
|
330 |
330 |
165 ohm |
171B |
|
360 |
720 |
240 ohm |
241B |
|
360 |
600 |
225 ohm |
231A |
|
390 |
620 |
239 ohm |
241A |
|
470 |
1K |
320 ohm |
321A |
|
470 |
680 |
278 ohm |
281A |
|
470 |
940 |
313 ohm |
311A |
|
500 |
500 |
250 ohm |
251A |
|
560 |
910 |
347 ohm |
351A |
|
560 |
1K |
359 ohm |
361A |
|
680 |
1K |
405 ohm |
401A |
|
750 |
750 |
375 ohm |
381A |
|
750 |
2.3K |
566 ohm |
571A |
|
1K |
3.3K |
767 ohm |
771A |
|
1K |
2K |
667 ohm |
671A |
|
1.1K |
2.2K |
733 ohm |
731A |
|
1.2K |
1.2K |
600 ohm |
601A |
|
1.5K |
1.5K |
750 ohm |
751A |
|
1.5K |
3.3K |
1031 ohm |
102A |
|
2K |
2K |
1000 ohm |
102B |
|
2.2K |
5.6K |
1579 ohm |
162A |
|
2.2K |
4.4K |
1467 ohm |
152A |
|
2.2K |
3.3K |
1320 ohm |
132A |
|
3K |
6.2K |
2022 ohm |
202A |
|
3K |
2K |
1200 ohm |
122A |
|
3.3K |
4.7K |
1939 ohm |
192A |
|
3.9K |
3.3K |
1788 ohm |
182A |
|
4.7K |
22K |
3873 ohm |
392A |
|
5K |
5K |
2500 ohm |
252A |
|
6.8K |
22K |
5194 ohm |
522A |
|
10K |
51K |
8361 ohm |
842A |
|
50K |
100K |
33,333 ohm |
333A |
1. All tolerances +-2%. *
2. Other values available on request.
3. Suffix letter has no significance - assigned in sequential
order.
|
