【云知声发布声控可穿戴ROM 一大波智能眼镜即将袭来】11月28，语言识别方案提供商云知声在北京发布了国内首款专门针对可穿戴式设备，采用语音操控基于安卓4.3的可穿戴ROM。目前该ROM基于君正XBurst架构的芯片解决方案，该方案最突出的特点就是超低的功耗。

概述

The MAX4638/MAX4639 are single 8:1 and dual 4:1 CMOS analog multiplexers/demultiplexers (muxes/demuxes). Each mux operates from a single +1.8V to +5V supply or dual ±2.5V supplies. These devices feature 3.5Ω on-resistance (RON) when powered with a single +5V supply and have -75dB off-isolation and -85dB crosstalk from the output to each off channel. The switching times are 18ns tON and 7ns tOFF. They feature a -3dB 85MHz bandwidth and a guaranteed 0.25nA leakage current at +25°C.

A +1.8V to +5.5V operating range makes the MAX4638/MAX4639 ideal for battery-powered, portable instruments. All channels guarantee break-before-make switching. These parts feature bidirectional operation and can handle rail-to-rail analog signals. All control inputs are TTL/CMOS-logic compatible. Decoding is in standard BCD format, and an enable input is provided to simplify cascading of devices. These devices are available in small 16-pin thin QFN, TSSOP, and SO packages, as well as a 20-pin TQFN package.

关键特性

Guaranteed RON

3.5Ω (+5V or ±2.5V Supplies)

6Ω (+3V Supply)

Guaranteed 0.4Ω RON Match Between Channels

Guaranteed 1Ω RON Flatness Over Signal Range

Guaranteed Low Leakage Currents

0.25nA at +25°C

Switching Times: tON = 18ns, tOFF = 7ns

+1.8V to +5.5V Single-Supply Operation

±2.5V Dual-Supply Operation

Rail-to-Rail Signal Handling

TTL/CMOS-Logic Compatible

Crosstalk: -80dB (1MHz)

Off-Isolation: -60dB (10MHz)

应用

音频/视频信号切换

自动测试设备(ATE)

电池供电设备

低电压数据采集系统

医疗装置

继电器替代品

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