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MAX3221CAE 的PDF资料 下载 ,318K

MAX3221CAE 的货源和报价 MAX3221CAE 的相关技术信息

相关型号

MAX3080 MAX3100 MAX319ESA MAX3221 MAX3221ECAE MAX3221ECAE+T MAX3221EEAE MAX3222

概述

The MAX3221/MAX3223/MAX3243 achieve 1µA supply current with Maxim's revolutionary AutoShutdown™ feature. When the MAX3221/MAX3223/MAX3243 do not sense a valid signal level on their receiver inputs, the on-board power supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are turned off. The system turns on again when a valid level is applied to any RS-232 receiver input. As a result, the system saves power without changes to the existing BIOS or operating system.

The MAX3221/MAX3223/MAX3243 transceivers are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces intended for notebook computer applications. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. A guaranteed data rate of 120kbps provides compatibility with popular software for communicating with personal computers.

The MAX3221/MAX3223/MAX3243 require only 0.1µF capacitors in 3.3V operation, and can operate from input voltages ranging from +3.0V to +5.5V. They are ideal for 3.3V-only systems, mixed 3.3V and 5.0V systems, or 5.0V-only systems that require true RS-232 performance.

The MAX3221 is a 1-driver/1-receiver 16-pin SSOP version of the 20-pin MAX3223 (2-driver/2-receiver). The MAX3243 3-driver/5-receiver, complete serial port is ideal for notebook or subnotebook computers. The MAX3243 includes one complementary always-active receiver. This receiver can monitor an external device (such as a modem) in shutdown, without forward biasing the protection diodes in a UART that may have VCC completely removed.

关键特性		应用
For Space-Constrained Applications: MAX3228/MAX3229: +2.5V to +5.5V RS-232 Transceivers in UCSP™ For Integrated ESD Protection: MAX3222E/MAX3232E/MAX3237E/MAX3241E*/ MAX3246E: ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers (MAX3246E Available in UCSP Package) For Low-Voltage or Data Cable Applications: MAX3380E/MAX3381E: +2.5V to +5.5V, 1µA, 2 Tx/2 Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins		电池供电设备 手持式装置 笔记本电脑、亚笔记本电脑与掌上电脑 外设 打印机

应用笔记

App Note 206: Using a PC's RS-232 Serial Port To Communicate with 2-Wire Devices - MAX3221, MAX3223 (English only) App Note 588: Multiplexer Enables Pseudomultidrop RS-232 Transmission - MAX3221 (English only) App Note 654: New RS-232 ICs Feature 1µA Supply Current, ±15kV ESD Protection, and 3V Operation - MAX3223, MAX3243 (English only) App Note 882: RS-232 Features Explained - MAX3221, MAX3223, MAX3243 (English only) App Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX3221, MAX3223, MAX3243 (English only) 应用笔记2588：利用RS232口为光纤数据环路供电 - MAX3221

注释

Auto shutdown reduces supply current to 1µA (MAX3221) Auto shutdown reduces supply current to 1µA (MAX3223) Auto shutdown reduces supply current to 1µA, complementary receiver, drives mice (MAX3243) * Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents pending.

图表

Typical Operating Circuit