Maxim推出雙向、4選2、USB 2.0交叉點(diǎn)開關(guān)MAX4

欄目：公司新聞發(fā)布時(shí)間：2008-10-30訪問量：260次

Maxim推出雙向、4選2、USB 2.0交叉點(diǎn)開關(guān)MAX4989

Maxim推出雙向、4選2、USB 2.0交叉點(diǎn)開關(guān)MAX4989。該器件能夠切換任何4選2 USB差分對，并支持高達(dá)480Mbps的數(shù)據(jù)速率，從而可同時(shí)切換多個(gè)USB主器件。MAX4989開關(guān)架構(gòu)具有5.0Ω(典型值)低導(dǎo)通電阻和6.0pF(典型值)低導(dǎo)通電容，從而可實(shí)現(xiàn)上述性能。另外，集成電荷泵提升了性能，可提供支持高速USB應(yīng)用所需的軌到軌滿擺幅信號，這使器件也兼容于早期USB。上述特性使MAX4989成為筆記本電腦和蜂窩電話的理想選擇。

為降低功耗，MAX4989提供了3路控制邏輯輸入，當(dāng)全部置高或置低時(shí)可使器件進(jìn)入關(guān)斷模式。關(guān)斷模式可將電源電流降至低于0.5μA，并將所有開關(guān)端口置于高阻態(tài)。

MAX4989采用2.7V至5.5V單電源供電，工作在-40°C至+85°C擴(kuò)展級溫度范圍。器件提供超小的3mm x 3mm、14引腳TDFN封裝。芯片起價(jià)為$1.50(1000片起，美國離岸價(jià))。

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.