ST5421 datasheet(3/7 Pages) PULSE

3 / 7 page

T604.F (05/12)

pulseelectronics.com

ISDN S-Interface Transformers

Transformer Selection & Packaging

Manufacturer

Part Number

Dual

Surface Mount

Single

Through Hole, 2 kVRMS

Dual

Through Hole

TX & RX

AT&T/Lucent

T7903

PE-65795

PE-64995NL

PE-65495

Mietec

MTC-2072

PE-65795

PE-64995NL

PE-65495

Mitel

MT8930

PE-65795

PE-64995NL

PE-65495

MC145474/145475

MC145574

National

TP3420/34221

PE-65795

PE-64995NL

PE-65495

SGS Thomson

ST5420, ST5421

PE-65795

PE-64995NL

PE-65495

PEB 2080/2081/2085

Siemens

PSB 2186

PE-65795

PE-64995NL

PE-65495

PEB 2084/2086

Yamaha

7405B

PE-65795

PE-64995NL

PE-65495

Notes:

A. In this catalog, turns ratio is expressed as

“primary:secondary”. The term “CT” designates a

center tapped winding. A center tapped winding

can be created by connecting two ends of a split

center winding together on the printed circuit board. In

ISDN-S applications, the primary winding is the line

side transformer winding.

B. The minimum primary inductance and the maximum

distributed capacitance satisfy the transmistter

output and receiver input impedance requirements of

CCITTI I.430 for both the TE and the NT. The maximum

distributed capacitance allows sufficient margin for the

capacitance of the IC and a protection diode network.

It is consistent with the overall maximum value

specified and the permitted length of the basic access

TE cord.

C. The maximum specified unbalanced DC current

capability is based on 20 mH minimum primary OCL

D. National recommends a 1:2 receive transformer, but

used as a 1:1 ratio by connectin only half the secondary

winding. See National’s application note.

E. PE-65950 and PE-65853 are recommended for use

with Siemens PEB 2080/2085 and help in meeting the

required longitudinal balance.

F. Standard packaging for all chokes and transformers

listed in this catalog is anti-static tubes. Optional

anti-static tray packaging can be ordered for the

surface mount SC-1 and LA-1 packages by adding an

“

R” suffix to the part number, (ie: PE-65795R). Optional

tape and reel packaging can be ordered for all surface

mount packages by adding a “

T” suffix to the part

number, (ie: PE-65795

T).

G. For PE-65854, OCL at -40C is 27 H minimum. For

maximum performance, using windings (1-8) and (2-7)

as a pair and windings (3-6) and (4-5) as a pair.

H. For transformers and choke modules, refer to data

sheet T632.

PE-65795

PE-65495

Packaging Information

Package

Type

Part Weight

Parts/Tube

Parts/Tray

Parts/Reel

Reel Diameter

Tape Width

Pitch

LA-1

SMT

2.0 Grams

250

13 Inches

24 mm

SC-1

SMT

7.0 Grams

150

13 Inches

44 mm

24 mm

ID-1

THT

7.0 Grams

IS-1

THT

4.0 Grams

Motorola

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