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MAX3221EEAE

MAX3221EEAE 的PDF资料

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MAX3221EEAE 的货源和报价

MAX3221EEAE 的相关技术信息

概述

The MAX3221E/MAX3223E/MAX3243E are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wakeup features, high datarate capabilities, and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air- Gap Discharge, to ±8kV using IEC 1000-4-2 Contact Discharge, and to ±15kV using the Human Body Model.

The MAX3221E/MAX3223E/MAX3243E achieve a 1µA supply current with Maxim's revolutionary AutoShutdown™ feature. They save power without changes to the existing BIOS or operating system by entering low-power shutdown mode when the RS-232 cable is disconnected, or when the transmitters of the connected peripherals are off.

The transceivers have a proprietary low-dropout transmitter output stage, delivering true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a +3.3V supply. Each device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels.

The MAX3221E contains just one driver and one receiver, making it the smallest single-supply RS-232 transceiver. The MAX3223E has two drivers and two receivers. The MAX3243E is a complete 3-driver/5-receiver serial port ideal for notebook or subnotebook computers. It also includes two noninverting receiver outputs that are always active, allowing external devices to be monitored without forward biasing the protection diodes in circuitry that may be powered down.

The MAX3221E, MAX3223E, and MAX3243E are available in space-saving TQFN, SSOP, and TSSOP packages.

关键特性 应用

For Space-Constrained Applications:
MAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V to +5.5V RS-232 Transceivers in UCSP™ 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 a UCSP Package)
For Data Cable Applications:
MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers with ±15kV ESDProtected I/O and Logic Pins

电池供电设备

蜂窝电话

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

Key Specifications: RS-232 Line Driver/Receivers

Part Number

Supply Voltage (V)

Number of Tx

Number of Rx

Data Rate (kbps)

Typ. I_CC Current (mA)

Internal Charge Pump

Number of Ext. Caps

Nom. Cap. Value (µF)

ESD Protection (±kV)

Number of Rx Active in Shutdown

Features

Package

Operating Temp. Range (°C)

RoHS Available

Price

MAX3221E

3.3 5

250

0.3

Yes

0.1

15.0

•	Auto-Shutdown

•	Micropower

•	Three State Rx O/P

•	True RS-232

16/SSOP
16/THIN QFN
16/TSSOP

0 to +70 -40 to +85

Yes

$1.45 @ 1k

MAX3223E

20/SSOP
20/PDIP
20/THIN QFN
20/TSSOP

$2.08 @ 1k

MAX3243E

28/SSOP
32/THIN QFN
28/TSSOP
28/SOIC

$3.82 @ 1k

应用笔记

App Note 639: Maxim Leads the Way in ESD Protection - MAX3223E (English only)

App Note 651: ESD Protection for I/O Ports - MAX3223E (English only)

App Note 739: Design Considerations for Data-Lump Cables - MAX3221E, MAX3223E, MAX3243E (English only)

App Note 882: RS-232 Features Explained - MAX3221E (English only)

App Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX3221E, MAX3223E, MAX3243E (English only)

注释

ESD Protection for RS-232 I/O Pins, Smallest Single-Supply RS-232 Transceiver (MAX3221E)

ESD Protection for RS-232 I/O PinS (MAX3223E)

ESD Protection for RS-232 I/O Pins, guaranteed mouse driveability. (MAX3243E)
^†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; 5,649,210; and other patents pending.

图表

Typical Operating Circuits