TLA4891 series transformers are

designed to interface telecommu-

nications equipment to a tele-

phone line, capable of handling

unbalanced DC.

Applications:

•

Low profile.

•

Up to 90 mA unbalanced line

current.

•

Exceeds the requirements of

FCC Part 68 and CS 03.

Line Impedance

Pri.

600

Ω

600

Ω c.t.

600

Ω

Sec.

600

Ω

600

Ω c.t

150/150

Ω

Turns Ratio

Pri. : Sec.

1 : 1

1 : 1

1 : 1

Winding Resistance, Ohms nom.

Pri.

75

75

75

Sec.

100

100

50 +50

Insertion Loss

@ 1000 Hz

1.7 dB

1.7 dB

1.7 dB

Frequency Response

300 - 3500 Hz

- 2.5 dB

- 2.5 dB

- 2.5 dB

Longitudinal Balance

300 - 3500 Hz

65 dB

65 dB

65 dB

Return Loss

300 - 3500 Hz

> 14.5 dB

> 14.5 dB

> 14.5 dB

DC Capability

90 mA

90 mA

90 mA

Dielectric Strength

1500 Vrms

1500 Vrms

1500 Vrms

P/N

L

W

H

A

B

C

S (DIA)

TLA4891

1.25

0.81

0.50

0.95

0.20

0.20

0.027

(31.8)

(20.4)

(12.7)

(24.13)

(5.08)

(5.08)

(0.68)

DIMENSIONS, Inches (mm)

1

Pri.

3

4

Sec.

6

Audio

Line Matching Transformer

TLA4891

Filtran Limited

229 Colonnade Road, Nepean, Ontario, Canada. K2E 3K7

8-8

Tel : (613) 226-1626 Fax : (613) 226-7124

TLA4891-1

TLA4891-2

TLA4891-3

1

Pri.

6

6

5 Sec.

4

1

Pri 2

3

2

5

Sec.

3

4

ELECTRICAL

TLA4891-1

TLA4891-2

TLA4891-3

MECHANICAL