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参数资料
| 型号： | 73M2901CE-EVM-WW |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/30页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 73M2901CE WORLDWIDE |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | * |
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73M2901CE Demo Board User Manual
UM_2901CE_026
3 73M2901CE EVM-600 Demo Board
During the past several years, there have been significant changes to the way telecommunications device
certification is handled. Previously you were required to take your new product to an authorized
certification laboratory to have certification testing performed. The United States has fundamentally
changed their approval procedures for telephone equipment. They have introduced the concept of SDoC
(Self-Declaration of Conformity), implying that formal approval of a TCB (Telecommunication Certification
Body) is not further necessary. The definition of the technical requirements has been delegated to
industry. There is a choice of conformity testing but, in general, the manufacturer or his authorized
representative must maintain technical documentation that includes a declaration of conformity and
shows how compliance is achieved. It is still a requirement to meet all the same technical requirements
for electrical compatibility with the network (TIA/EIA/IS-968 (Part 68) ), electrical safely (UL-60950 power
cross) and EMI (Part 15 radiated emissions). Unless you are equipped to perform the tests to verify the
operation of your product, it is still prudent to use a third party testing laboratory to assure compliance
with applicable regulations. The ACTA (Administrative Council for Terminal Attachments) is the body that
now administers the telecom terminal equipment. The FCC is no longer involved in any aspect of the
process. The ACTA is a privatized organization and administers all aspects of the telecom equipment.
See http://www.part68.org for information on the ACTA.
The 73M2901CE Demo Board is designed to meet all the applicable certification regulations defined in
those regulations. The 73M2901CE EVM-600 Demo Board design is intended for use in countries that
use a 600 Ω resistive termination. Although designed to meet the ACTA defined specifications, the
73M2901CE EVM-600 demo board is not a certified device, and it is therefore not intended for use on the
PSTN network. It should only be used in a laboratory environment with network simulation equipment.
The network input protection is now standard worldwide, so finding components that that meet UL-60950
Power Cross requirements are not too difficult. Input current limiting and over-voltage protection are both
universally required or advised. Self-resetting PPTC fuses are now available that not only protect the
product but eliminate the need to replace parts if they are tripped. These protection devices tend to be
some of the more expensive components in the design, but to scrimp on these in the initial design can
cause problems latter when fixing the problem is more expensive.
3.1
Using the 73M2901CE EVM-600 Demo Board
The schematic in Figure 2 shows the design for the 73M2901CE EVM-600 Demo Board. The design
uses a “wet transformer” that uses the transformer as the DC load on the line. The advantage to using
this topology is that the BOM cost can be lower compared to a “dry transformer” which passes the DC
current through an external circuit that simulates an inductor. A dry transformer can be made much
smaller, so if small size is important, a dry transformer is preferred.
complex impedances. With these three terminations, worldwide terminations impedance requirements
can be met. Other demo boards are available to support these other terminations. The 73M2901CE
EVM-600 Demo Board uses a wet transformer design that has a 600 Ω resistive termination.
Table 3: Termination Impedance Network Values
8
Termination
600 Ohm
ETSI TS 203 complex
Australia
Terminator Component Values
600 Ω
750 Ω || 150nF + 270 Ω
820 Ω || 120nF + 220 Ω
Rev. 1.5
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| 73M2901CE-IGV/F | 功能描述:电信线路管理 IC V.22bis Single-Chip Modem RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M2901CE-IGVR/F | 功能描述:电信线路管理 IC V.22bis Single-Chip Modem RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M2901CE-IM/F | 功能描述:电信线路管理 IC V.22bis Single-Chip Modem RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M2901CE-IM/F1 | 功能描述:电信线路管理 IC RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M2901CE-IMR/F | 功能描述:电信线路管理 IC V.22bis Single-Chip Modem RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
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