MAX3218:1µA、1.8V至4.25V、RS-232收发器,带有AutoShutdown™

The MAX3218 RS-232 transceiver is intended for battery-powered EIA/TIA-232E and V.28/V.24 communications interfaces that need two drivers and two receivers with minimum power consumption from a single low-voltage supply. It provides a wide +1.8V to +4.25V operating voltage range while maintaining true RS-232 and EIA/TIA-562 voltage levels. The MAX3218 runs from two alkaline, NiCd, or NiMH cells without any form of voltage regulator. A guaranteed 120kbps data rate provides compatibility with popular software for communicating with personal computers. Supply current is reduced to 1µA with Maxim's new AutoShutdown feature. When the MAX3218 does not sense a valid signal level on the 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 either RS-232 receiver input. As a result, the system saves power without changes to the existing software. Additionally, the MAX3218 can be forced into or out of shutdown, under logic control. While shut down, all receivers can remain active or can be disabled under logic control, permitting a system incorporating the CMOS MAX3218 to monitor external devices while in low-power shutdown. Three-state drivers are provided on both receiver outputs so that multiple receivers, generally of different interface standards, can be on the same bus. The MAX3218 is available in 20-pin DIP and SSOP packages.

关键特性
  • 1µA Supply Current Using AutoShutdown
  • Operates Directly from Two Alkaline, NiCd or NiMH Cells
  • +1.8V to +4.25V Single-Supply Voltage Range
  • 120kbps Data Rate Guaranteed
  • Low-Cost Surface-Mount Components
  • Meets EIA/TIA-232E Specifications
  • Three-State Receiver Outputs
  • Flow-Through Pinout
  • On-Board DC-DC Converters
  • 20-Pin SSOP and DIP Packages
MAX3218:典型工作电路
MAX3218:典型工作电路
应用
  • 电池供电应用
  • 蜂窝电话
  • 手持式装置
  • PDA
  • 外设
  • 亚笔记本电脑
数据手册DataSheet
语言下载文件备注
英文MAX3218.pdfRev 0; 03/1995
关键参数
Part NumberVSUPPLY
(V)
TxRxData Rate
(kbps)
ICC
(mA)
Internal Charge PumpExt. CapsCap. Value
(µF)
Rx Active in ShutdnPackage/PinsBudgetary
Price
mintypnomSee Notes
MAX32181.8221202Yes20.33/0.682
  • PDIP(N)/20
  • SOIC(W)/20
  • SSOP/20
$2.87 @1k
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX3218C/D停止供货DICE SALES,;NA引脚;DICE;0°C至+70°C参考数据资料
MAX3218CAP停止供货MAX3218CAP+SSOP,;20引脚;57.9mm²0°C至+70°CRoHS/无铅:否
MAX3218CAP+生产中SSOP,;20引脚;57.9mm²0°C至+70°CRoHS/无铅:无铅
MAX3218CAP+T生产中SSOP,;20引脚;57.9mm²0°C至+70°CRoHS/无铅:无铅
MAX3218CAP-T停止供货MAX3218CAP+TSSOP;20引脚0°C至+70°C参考数据资料
MAX3218CPP停止供货MAX3218CPP+PDIP(N),;20引脚;219.2mm²0°C至+70°CRoHS/无铅:否
MAX3218CPP+生产中PDIP(N),;20引脚;219.2mm²0°C至+70°CRoHS/无铅:无铅
MAX3218CWP停止供货MAX3218CWP+SOIC(W),;20引脚;138.5mm²0°C至+70°CRoHS/无铅:否
MAX3218CWP+生产中SOIC(W),;20引脚;138.5mm²0°C至+70°CRoHS/无铅:无铅
MAX3218CWP+T停止供货W.SO;0°C至+70°C参考数据资料
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX3218CWP-T停止供货W.SO;20引脚0°C至+70°C参考数据资料
MAX3218EAP停止供货MAX3218EAP+SSOP,;20引脚;57.9mm²-40°C至+85°CRoHS/无铅:否
MAX3218EAP+生产中SSOP,;20引脚;57.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX3218EAP+T生产中SSOP,;20引脚;57.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX3218EAP-T停止供货MAX3218EAP+TSSOP;20引脚-40°C至+85°C参考数据资料
MAX3218EPP停止供货PDIP(N),;20引脚;219.2mm²-40°C至+85°CRoHS/无铅:否
MAX3218EWP停止供货SOIC(W),;20引脚;138.5mm²-40°C至+85°CRoHS/无铅:否
MAX3218EWP-T停止供货W.SO;-40°C至+85°C参考数据资料
MAX3218.pdf MAX3218
MAX3218.pdf MAX3218
MAX3218.pdf MAX3218
Determining Clock Accuracy Requirements for UART Communications MAX3206E
Lower the Supply Current in Your RS-232 System MAX3388E
RS-232 Features Explained MAX3381E
Selecting and using RS-232 Interface Parts for Your Power Supply Voltages MAX3387E
New RS-232 ICs Feature 1µA Supply Current, ±15kV ESD Protection, and 3V Operation MAX561
MAX3218.pdf MAX3218
MAX3218.pdf MAX3218