AMD推出可取代变压器的低成本线路界面应用方案晶片

• 出 处: 今日电子
• 发表日期: 1996年06期
• 关键词: AMD 内置电池 摘机 telephone POTS 电话服务 接口电路 控制状态 浪涌保护 印刷电路板

AMD推出一款专为低成本、高性能的低档旧式电话服务(plain old telephone service,POTS)线路界面而设计的用户接口电路(Subscriber Line InterfaceCircuit,SLIC)。 Am7920是一款低成本的SLIC,可取代采用变压器的传统线卡设计,备有变压器提供的所有基本功能,包括内置电池充电、挂机/摘机侦测、挂机传输、由晶片控制的震铃分隔、可编程常数电流充电、及低备用功率等。此外,此款晶片亦备有一个简易控制界面,可支援使用、震铃、备用及关闭(中断电路)等四个控制状态。

AMD introduced a Subscriber Line Interface Circuit (SLIC) designed for low-cost, high-performance plain old telephone service (POTS) line interfaces. The Am7920 is a low-cost SLIC that replaces the traditional line card design with transformers and includes all the basic transformer functions, including built-in battery charging, on / off hook detection, on hook transmission, and chip controlled chime separation , Programmable constant current charge, and low standby power. In addition, this chip also has a simple control interface to support the use of, ring, standby and shutdown (interrupt circuit) and other four control states.