Telephone Line Digital Filters

Telephone Line Digital Filters
ETS-Lindgren's LTC series of telephone line digital filters are ideal for applications including communication lines entering or leaving shielded rooms, computer rooms, communication terminal rooms, and Sensitive Compartmental Information Facilities (SCIF).

ETS-Lindgren's LTC series of telephone line digital filters are ideal for applications including communication lines entering or leaving shielded rooms, computer rooms, communication terminal rooms, and Sensitive Compartmental Information Facilities (SCIF).

LTC-X640 filters have multiple circuits to handle 2, 4, 6, 8, 10 or 12 wires, and are designed for stand-alone, individual mounting. These filters may be supplied with an optional threaded conduit pipe for penetration of a shielded enclosure.

Key Product Information

Specifications Select a tab below for more information

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

PLEASE NOTE: For Installation on shield, filters can be ordered with penetration kit. Add "/PEN" to model numbers.

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)