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T622.J (11/09)

Notes from Electrical Specifications Table

A. OCL (primary inductance) is measured at the primary winding. Turns ratio is

specified primary: secondary. (CT = Center Tap).

B. To make a 1CT:1 ratio from a 1CT:2CT ratio, use only one-half of the secondary

(2CT) winding.

C. It is possible to use the same transformer model for the three impedance levels

of T1 (100 W) and CEPT (75

Ω & 120 Ω). For specific connection information and

resistor values, refer to IC vendor’s data book.

D. Dual Ratio Transformer (T1071NL and T1145NL) — These transformers have

tapped secondary windings to provide two turns ratios (T/R). Use the entire

primary winding and connect the secondary pins listed below to obtain desired

turns ratio:

Part

Number

Turns

Ratio 1

Secondary

Pins

Turns

Ratio 2

Secondary

Pins

1:1

40-39

1:1.26

40-38

T1071NL

1:1

35-34

1:1.26

35-33

1:1

30-29

1:1.26

30-28

1:1

25-24

1:1.26

25-23

1:2

40-39

1:2.4

40-38

T1145NL

1:2

33-32

1:2.4

33-31

1:2

30-29

1:2.4

30-28

1:2

23-22

1:2.4

23-21

E. Standard packaging for the surface mount package is anti-static tubes. Optional

Tape & Reel packaging can be ordered by adding a “T” suffix to the part

number, (i.e. T1063NLT).

F. Extended Temperature Range Models — For extended temperature range

transformers (-40°C to +85°C operating temperature range), OCL (Open Circuit

Inductance) for the primary winding) is specified at both -40°C and +25°C. At

-40°C, OCL is 600 µH minimum. All other parameters are specified at +25°C

only. Standard temperature range is 0°C to +70°C

Transformer Selection Guide

IC Mfr.

IC Part Number

Comments

Octal SMT

STD Temp

EXT Temp

Mindspeed

BT8510

T1/E1

T1071NL

—

(Conexant)

BT8510

T1/E1

T1071NL

—

CN8380

T1124NL

T1114NL

Cirrus Logic

61318

120 E1

T1068NL

T1108NL

(Crystal)

61577

T1 & E1

T1065NL

T1105NL

61304A/5A/535A/574A,/75

75 E1

T1068NL

T1108NL

61304A/5A/535A/574A,/75

120 E1

T1071NL

—

61582, 61583

T1064NL

—

61310, 61581

T1068NL

T1108NL

61584/84A

IQ3

T1065NL

T1105NL

61584/82/83/A

IQ5

T1064NL

—

Maxim

DS2196

T1068NL

T1108NL

(Dallas)

DS2148/Q48

3V

T1068NL

T1108NL

DS21352/Q352,DS21354/Q354

T1068NL

T1108NL

Exar

T5683A, 59L91

T1065NL

T1105NL

T5894,T5897,T5997

T1065NL

T1105NL

T5791/93/94/95

T1071NL

—

83L30/34/38

T1065NL

T1105NL

Infineon

PEB 22504

3.3V

T1142NL

T1231NL

Technologies

PEB22554

3.3V

T1142NL

T1231NL

(Siemens)

PEB2256 3.3 V

E1/T1/J1

T1142NL

T1231NL

Intel

LXT 300/301

T1065NL

T1105NL

(Level One)

LXT 304/305/307

T1,E1

T1065NL

T1105NL

LXT 304/305/307

75 E1,120E1

T1071NL

—

LXT 310/317/318

T1068NL

T1108NL

LXT 331

T1,E1

T1068NL

T1108NL

LXT 331, LXT 332

T1065NL

T1105NL

LXT 334, LXT 335

T1/E1

T1065NL

T1105NL

LXT 334, LXT 335

75 E1

T1071NL

—

LXT 336

T1065NL

T1105NL

LXT 350, LXT 351, LXT 359

T1,E1

T1068NL

T1108NL

LXT 360/361/362/363

T1,E1

T1068NL

T1108NL

LXT 380/381/384/386/388

T1/E1

T1068NL

T1108NL

LXT 380/381/384/386/388

T1/E1

T1124NL

T1114NL

LXT 3104, LXT 3108

T1068NL

T1108NL

Lucent

T7688, T7690, T7698

CEPT

T1063NL

—

Technologies

T7689, T7690, T7698

DS1

T1064NL

—

TLIU04C1

DS1

T1064NL

—

TLIU04C1

CEPT

T1063NL

—

Zarlink

MT9076, MT9075

T1142NL

T1231NL

(Mitel)

MT9074, MT9075

T1068NL

T1108NL

PMC Sierra

PM4318

T1065NL

T1105NL

T1/E1/CEPT/ISDN-PRI TRANSFORMERS

Quad Port T1/E1 with 8 Transformers, 1500 Vrms

TOU

Schematics

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