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Maxim推出双向、4选2、USB 2.0交叉点开关MAX4989
Maxim推出双向、4选2、USB 2.0交叉点开关MAX4989。该器件能够切换任何4选2 USB差分对，并支持高达480Mbps的数据速率，从而可同时切换多个USB主器件。MAX4989开关架构具有5.0Ω(典型值)低导通电阻和6.0pF(典型值)低导通电容，从而可实现上述性能。另外，集成电荷泵提升了性能，可提供支持高速USB应用所需的轨到轨满摆幅信号，这使器件也兼容于早期USB。上述特性使MAX4989成为笔记本电脑和蜂窝电话的理想选择。
为降低功耗，MAX4989提供了3路控制逻辑输入，当全部置高或置低时可使器件进入关断模式。关断模式可将电源电流降至低于0.5μA，并将所有开关端口置于高阻态。
MAX4989采用2.7V至5.5V单电源供电，工作在-40°C至+85°C扩展级温度范围。器件提供超小的3mm x 3mm、14引脚TDFN封装。芯片起价为$1.50(1000片起，美国离岸价)。
MAX4989 概述
The MAX4989 is a bidirectional 2-of-4 USB 2.0 crosspoint switch. The MAX4989 features the low on-capacitance and low on-resistance necessary to switch USB 2.0 low-/full-/Hi-Speed signals at data rates up to 480Mbps. This device allows any 2-of-4 USB pairs to be connected together and is configured through a simple 3-input control logic interface.
The MAX4989 operates from a single +2.7V to +5.5V supply and features an internal charge pump to permit full rail-to-rail swing. This device also features a high-impedance shutdown mode to reduce supply current to 100nA (typ).
The MAX4989 is available in a 14-pin, 3mm x 3mm TDFN package and operates over the extended -40°C to +85°C temperature range.
MAX4989 pdf datasheet (USB 2.0 Hi-Speed 2-of-4 Crosspoint Switch)
MAX4989 关键特性
MAX4989 应用/使用: 笔记本电脑
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