LTC Telephone Line Digital Filters
ETS-Lindgren’s LTC Series of filters are ideal for applications including communication lines entering or leaving shielded rooms, computer rooms, communication terminal rooms, and Sensitive Compartmental Information Facilities (SCIF).
The LTC-X640 series filters have multiple circuits to handle 2, 4, 6, 8, 10 or 12 wires, and are designed for stand-alone, individual mounting. The LTC-X640 series filters may be supplied with an optional threaded conduit pipe for penetration of a shielded enclosure.
| Model | Passband Impedance | Passband Loss | Stopband Insertion Loss | Maximum Current | Maximum Voltage |
| LTC-X640-C10K | 600 (L-L), 300 (L-G) | 0.5 dB Maximum 0 to 40 kHz |
100 dB Minimum @ 330 KHz to 18 GHz |
0.5 | 125 |
| LTC-X640-D56K | 600 (L-L), 300 (L-G) | 1.0 dB Maximum 0 to 140 kHz |
100 dB Minimum @ 1 MHz to 18 GHz |
0.5 | 125 |
| LTC-X640-E128K | 150 (L-L), 75 (L-G) | 1.0 dB Maximum 0 to 300 kHz |
100 dB Minimum @ 1.5 MHz to 18 GHz |
0.5 | 125 |
| Model | Number of Lines | Width |
| LTC-2640-C10K |
2 |
7.62 cm (3.00 in) |
| LTC-4640-C10K |
4 |
5.24 cm (6.00 in) |
| LTC-6640-C10K |
6 |
30.48 cm (12.00 in) |
| LTC-8640-C10K |
8 |
30.48 cm (12.00 in) |
| LTC-10640-C10K |
10 |
45.72 cm (18.00 in) |
| LTC-12640-C10K |
12 |
45.72 cm (18.00 in) |
| LTC-2640-D56K |
2 |
7.62 cm (3.00 in) |
| LTC-4640-D56K |
4 |
5.24 cm (6.00 in) |
| LTC-6640-D56K |
6 |
30.48 cm (12.00 in) |
| LTC-8640-D56K |
8 |
30.48 cm (12.00 in) |
| LTC-10640-D56K |
10 |
45.72 cm (18.00 in) |
| LTC-12640-D56K |
12 |
45.72 cm (18.00 in) |
| LTC-2640-E128K |
2 |
.62 cm (3.00 in) |
| LTC-4640-E128K |
4 |
15.24 cm (6.00 in) |
| LTC-6640-E128K |
6 |
30.48 cm (12.00 in) |
| LTC-8640-E128K |
8 |
30.48 cm (12.00 in) |
| LTC-10640-E128K |
10 |
45.72 cm (18.00 in) |
| LTC-12640-E128K |
12 |
45.72 cm (18.00 in) |
NOTE: For Installation on shield, filters can be ordered with penetration kit. Add “/PEN” to model numbers.
