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. 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. 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. The MAX3221 is a 1-driver/1-receiver 16-pin SSOP version of the 20-pin 2-driver/2-receiver MAX3223. The MAX3243 is a 3-driver/5-receiver with a complementary always-active receiver for external monitoring in a variety of 28 pin packages. Please see order information table for package offerings.
关键特性
| 应用
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| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX3221-MAX3243.pdf | Rev 9; 02/2015 |
| Part Number | VSUPPLY (V) | Tx | Rx | Data Rate (kbps) | ICC (mA) | Internal Charge Pump | Ext. Caps | Cap. Value (µF) | Rx Active in Shutdn | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|
| min | typ | nom | See Notes | ||||||||
| MAX3221 |
| 1 | 1 | 120 | 0.3 | Yes | 4 | 0.1 | 1 |
| $1.67 @1k |
| MAX3223 | 2 | 2 | 2 |
| $2.56 @1k | ||||||
| MAX3243 | 3 | 5 | 1 |
| $4.45 @1k | ||||||
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX3243CAI | 停止供货 | MAX3243CAI+ | SSOP,；28引脚；81.6mm² | 0°C至+70°C | 参考数据资料 |
| MAX3243CAI+ | 生产中 | SSOP,；28引脚；81.6mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX3243CAI+G1Z | 生产中 | SSOP,；28引脚；81.6mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX3243CAI+T | 生产中 | SSOP,；28引脚；81.6mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX3243CAI-T | 停止供货 | MAX3243CAI+T | SSOP,；28引脚；81.6mm² | 0°C至+70°C | 参考数据资料 |
| MAX3243CUI | 停止供货 | MAX3243CUI+ | TSSOP,；28引脚；64.7mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX3243CUI+ | 生产中 | TSSOP,；28引脚；64.7mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX3243CUI+T | 生产中 | TSSOP,；28引脚；64.7mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX3243CUI-T | 停止供货 | MAX3243CUI+T | TSSOP,；28引脚；64.7mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX3243CWI | 停止供货 | MAX3243CWI+ | SOIC(W),；28引脚；192.8mm² | 0°C至+70°C | RoHS/无铅：否 |
| 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？ |
| MAX3243CWI+ | 生产中 | SOIC(W),；28引脚；192.8mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX3243CWI+T | 生产中 | SOIC(W),；28引脚；192.8mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX3243CWI-T | 停止供货 | MAX3243CWI+T | W.SO；28引脚 | 0°C至+70°C | 参考数据资料 |
| MAX3243EAI | 停止供货 | MAX3243EAI+ | SSOP,；28引脚；81.6mm² | -40°C至+85°C | 参考数据资料 |
| MAX3243EAI+ | 生产中 | SSOP,；28引脚；81.6mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX3243EAI+T | 生产中 | SSOP,；28引脚；81.6mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX3243EAI-T | 停止供货 | MAX3243EAI+T | SSOP；28引脚 | -40°C至+85°C | 参考数据资料 |
| MAX3243EUI | 停止供货 | MAX3243EUI+ | TSSOP,；28引脚；64.7mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX3243EUI+ | 生产中 | TSSOP,；28引脚；64.7mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX3243EUI+T | 生产中 | TSSOP,；28引脚；64.7mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| 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？ |
| MAX3243EUI-T | 停止供货 | MAX3243EUI+T | TSSOP,；28引脚；64.7mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX3243EWI | 停止供货 | MAX3243EWI+ | SOIC(W),；28引脚；192.8mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX3243EWI+ | 生产中 | SOIC(W),；28引脚；192.8mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX3243EWI+T | 生产中 | SOIC(W),；28引脚；192.8mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX3243EWI-T | 停止供货 | MAX3243EWI+T | W.SO；28引脚 | -40°C至+85°C | 参考数据资料 |
| MAX3243ICAI | 停止供货 | SSOP,；28引脚；81.6mm² | 0°C至+70°C | 参考数据资料 | |
| MAX3243ICAI-T | 停止供货 | SSOP；28引脚 | 0°C至+70°C | 参考数据资料 | |
| MAX3243ICUI | 停止供货 | TSSOP,；28引脚；64.7mm² | 0°C至+70°C | RoHS/无铅：否 | |
| MAX3243ICUI-T | 停止供货 | TSSOP；28引脚 | 0°C至+70°C | 参考数据资料 |
