The 4 wire interface between Sub-

scriber Terminals and the Network Ter-

mination has been standardized by

CCITT recommendation I.430. It uses

a passive bus which provides separate

receive and transmit loops operating at

192 Kbits/s.

Two versions of TPW3852 have been

designed and approved for use with

the following devices:

TEW3852

Siemens PEB2080

PEB2081

PEB2085

PEB2086

AMD

Am79C30A

MT8930A, -B, -C

MT8931B, -C

(See schematic below for correct connec-

tions.)

ISDN S-Bus

Input/Output Transformer

TPW3852

Filtran Limited

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

3-5

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

Dot at pin 1

All dimensions

are in inches

Device

PEB2080

MT8930A, -B, -C

PEB2085

MT8931B, -C

PEB2086

Am79C30A

Turns ratio

(2 - 6) : (5 - 3)

1 : 2

1 : 2

Inductance

(2 - 6)

> 22 mH

> 20 mH

Leakage Ind.

(2 - 6)

< 12

µH

< 6.0

µH

DC Resistance

(2 - 6)

1.0

Ω

3.2

Ω

(3 - 5)

9.0

Ω

6.3

Ω

Output Impedance

Conforms to the impedance mask specified in I.430

Pulse Characteristics

Conforms to the pulse mask specified in I.430

Dielectric Strength, (rms)

1500 V

1500 V

TPW3852

TPW3852-4

5

4 Device

3

2

Line 1

6

2

Line 1

6

ELECTRICAL

TPW3852

TPW3852-4

MECHANICAL

3

4 Device

5

TPW3852-4

TPW3852-4

5

3

3

5

2

1

6

6

1

2