Design Guidelines for 78P235x E4/STM1e LIUs
PCB layout and hardware design guidelines for Teridian 78P235x STM1e/E4 Line Interface Units, covering terminations, grounding, transformer selection, and surge protection.
Overview
This application note provides comprehensive design and layout guidelines for the Teridian 78P235x series of STM1e/E4 Line Interface Units (LIUs), including the 78P2351, 78P2351R, and 78P2352. It details best practices for PCB grounding using split component and frame ground planes, power plane decoupling, and differential trace routing for CMI and LVPECL signals. The document specifies I/O termination circuits for transmitters and receivers, recommendations for 1:1CT wideband transformers from vendors like Mini-Circuits, Halo, and Tamura, and supplemental surge protection for ITU K.41 compliance. It also includes crystal oscillator requirements and thermal management advice for enhanced LQFP packages.
Use Cases
- Designing telecommunication line cards
- Implementing STM1e/E4 interfaces
- Optimizing signal integrity for high-speed LIUs
- Selecting compatible transformers and oscillators for 78P235x designs
Topics
Referenced Parts
CB3LV-3C-19.440000
CTS Corporation
CTS CB3LV-3C-19.440000
C3392-19.44MHz
Crystek Corporation
Crystek C3392-19.44MHz
SM78809
Datatronics
Datatronic SM78809
EH2645ETTS-19.440M
Ecliptek
Ecliptek EH2645ETTS-19.440M
TG04-TDK1N1
Halo Electronics
Halo TG04-TDK1N1
TG04-TDK2NS
Halo Electronics
Halo TG04-TDK2NS
000-7419-30R-LF1
Midcom
Midcom 000-7419-30R-LF1
7400-30R-LF1
Midcom
Midcom 7400-30R-LF1
S1613B-19.44
SaRonix
SaRonix S1613B-19.44
TTC-298
Tamura Corporation
Tamura TTC-298
TTC-300
Tamura Corporation
TAMURA TTC-300
78P2351
Teridian Semiconductor
78P2351 Single Channel LIU
78P2351R
Teridian Semiconductor
78P2351R Small form factor LIU
78P2352
Teridian Semiconductor
78P2352 Dual Channel LIU
TXC-03456
Transwitch
Transwitch L4M TXC-03456 E4 Mapper
1N1
TDK
Halo TG04-TDK1N1
2NS
TDK
Halo TG04-TDK2NS
78P2351
TDK
TDK 78P2351
TG04-
TDK
Halo TG04-TDK1N1
TG04-
TDK
Halo TG04-TDK2NS
| ADT1-1WT-1 | Mini-Circuits | Mini Circuit ADT1-1WT-1 |
| ASV-19.44MHz-C | Abracon | Abracon ASV-19.44MHz-C |
| CB3LV-3C-19.440000 | CTS Corporation | CTS CB3LV-3C-19.440000 |
| C3392-19.44MHz | Crystek Corporation | Crystek C3392-19.44MHz |
| SM78809 | Datatronics | Datatronic SM78809 |
| EH2645ETTS-19.440M | Ecliptek | Ecliptek EH2645ETTS-19.440M |
| TG04-TDK1N1 | Halo Electronics | Halo TG04-TDK1N1 |
| TG04-TDK2NS | Halo Electronics | Halo TG04-TDK2NS |
| 000-7419-30R-LF1 | Midcom | Midcom 000-7419-30R-LF1 |
| 7400-30R-LF1 | Midcom | Midcom 7400-30R-LF1 |
| S1613B-19.44 | SaRonix | SaRonix S1613B-19.44 |
| TTC-298 | Tamura Corporation | Tamura TTC-298 |
| TTC-300 | Tamura Corporation | TAMURA TTC-300 |
| 78P2351 | Teridian Semiconductor | 78P2351 Single Channel LIU |
| 78P2351R | Teridian Semiconductor | 78P2351R Small form factor LIU |
| 78P2352 | Teridian Semiconductor | 78P2352 Dual Channel LIU |
| TXC-03456 | Transwitch | Transwitch L4M TXC-03456 E4 Mapper |
| 1N1 | TDK | Halo TG04-TDK1N1 |
| 2NS | TDK | Halo TG04-TDK2NS |
| 78P2351 | TDK | TDK 78P2351 |
| TG04- | TDK | Halo TG04-TDK1N1 |
| TG04- | TDK | Halo TG04-TDK2NS |