| ISDN transformers DNT700B series (SMD type) |
|
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 |
Features
- Conforms to ITU-T I.430 standard
- Compact, light, easy surface mounting
- Automated mounting and reflow soldering
- High impedance and low loss
- Models (DNT733 and DNT734) capable of withstanding a 2KV voltage available.
- The products contain no lead and also support lead-free soldering.
Application
- Switchboards (PBX)
- Network terminal units (DSU, OCU)
- Terminal adapters (TA)
- ISDN terminals (G4 faxes, ISDN phones, etc.)
|
| Electrical characteristics |
| Model No. |
Complying
interface |
Winding ratio
Primary:
secondary |
Primary inductance
|
Primary leakage inductance
|
Primary distribution capacity |
DC resistance |
Insulation withstand voltage |
Connection diagram |
| Primary |
Secondary |
| DNT733B |
Basic interface |
1:2 |
22mH
min. |
15 H
max. |
150pF
max. |
6
max. |
12
max. |
AC2KV,
1 min. |
Fig.1 |
| DNT734B |
1:1 |
22mH
min. |
10H
max. |
150pF
max. |
6
max. |
7
max. |
AC2KV,
1 min. |
Fig.1 |
EE10
ST018B |
U I/F
(*) |
1:0.5:1 |
15mH
min. |
8H
max. |
50pF
max. |
3
max. |
4
max. |
AC500V,
1 min. |
Fig.2 |
| (*) The specifications of UI/F transformers
vary according to the types of LSIs used. |
| Model No. |
Complying LSI |
| DNT733B |
Fujitsu |
MB86405(transmission) |
| YAMAHA |
YTD410/YTD421B/
YTD428/YTD436/YTD439 |
| NEC |
PD98201(transmission)/PD98205(transmission) |
| AMD |
Am79C30 |
| Siemens |
PEB2080/PEB2085 |
| NS |
TP3420 |
| Toshiba |
TA32031F/TA32032F |
| DNT734B |
NEC |
PD98201(receiving)/PD98205(receiving) |
| Motorola |
MC145474/MC145475 |
| EE10ST018B |
YAMAHA |
YTD428 |
| Connection diagram |
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 |
|
| Shapes and dimensions |
Unit: mm |
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