引脚定义与内部结构
| 引脚 | 符号 | 名称 |
|---|---|---|
| 10 | R2OUT | |
| 11 | T2IN | |
| 12 | T1IN | |
| 13 | R1OUT | |
| 14 | R1IN | |
| 15 | T1OUT | |
| 16 | GND | |
| 17 | VCC | |
| 18 | SO |
数据来源：原厂规格书引脚图
关键参数速览
- 电源电压 VCC
- +25°C.)
- 工作温度 TA
- +25°C.)
- 传输速率
- 235
产品特点 Features
- MAX242 and MAX232, respectively.
- The MAX3241 is a complete serial port (3 drivers/
- ' Pin Compatible with Industry-Standard MAX232
- (MAX3232)
- Pin Compatible with Industry-Standard MAX242
- (MAX3222)
- ' Guaranteed Slew Rate:
- 6V/µs (MAX3222/MAX3232/MAX3237/MAX3241)
- 24V/µs (MAX3237—MegaBaud Operation)
- The MAX3222/MAX3232/MAX3237/MAX3241 trans- ceivers have a proprietary low-dropout transmitter out- put stage enabling true RS-232 performance from a
- 3.0V to 5.5V supply with a dual charge pump. The devices require only four small 0.1µF external charge- pump capacitors. The MAX3222, MAX3232, and
- MAX3241 are guaranteed to run at data rates of
- 120kbps while maintaining RS-232 output levels. The
- MAX3237 is guaranteed to run at data rates of 250kbps in the normal operating mode and 1Mbps in the
- MegaBaud™ operating mode, while maintaining RS-232 output levels.
- ' Low Supply Current:
绝对最大额定值 Absolute Maximum Ratings（TA = 25°C）
超过下表数值可能造成器件永久损坏，设计时请留余量。
| 参数 | 条件 | 最小 | 典型 | 最大 | 单位 |
|---|---|---|---|---|---|
| 3.0V to 5.5V, | Low-Power, up to | 1Mbps, | True | RS-232 | |
| 3.0V to 5.5V, | Low-Power, up to | 1Mbps, | True | RS-232 | |
| Maximum Data Rate | tPHL | 1000 1000 | 0.15 | kbps | |
| Receiver Propagation Delay R_IN | to R_OUT, CL = 150pF tPLH | 0.15 | µs | ||
| Receiver Output Enable Time Normal | operation | 200 | ns | ||
| Receiver Output Disable Time Normal | operation | 200 | ns | ||
| | tPHL | - tPLH |, MBAUD = GND | 100 | ns | ||
| | tPHL | - tPLH |, MBAUD = VCC | 25 | ns | ||
| Receiver Skew | tPHL | - tPLH | | 6 | 50 | 30 | ns |
| Transition-Region Slew Rate +3V | to -3V or -3V to +3V, | 24 | 150 | V/µs | |
| CL = 150pF to | 2500pF, 4 | 30 | |||
| MAX3237: C1–C4 = 0.1µF | tested at 3.3V ±5%; C1–C4 = 0.22µF tested | at 3.3V ±10%; C1 = | 0.047µF, | C2–C4 = 0.33µF | tested |
| __________________________________________Typical | Operating | Characteristics | |||
| MAX3222/MAX3232 | MAX3222/MAX3232 | MAX3222/MAX3232 | |||
| TRANSMITTER OUTPUT VOLTAGE | SLEW RATE | SUPPLY | CURRENT | vs. LOAD | CAPACITANCE |
| vs. LOAD CAPACITANCE | vs. LOAD CAPACITANCE | WHEN | TRANSMITTING | DATA | |
| 6 | 10-2223XAM 22 | 20-2223XAM 40 | 30-2223XAM | ||
| )V( 5 VOUT+ | 20 FOR DATA RATES UP TO | 235kbps | |||
| EGATLOV 4 | 18 | 235kbps | |||
| 3 | 16 | )Am( 30 | |||
| /mV( 14 | TNERRUC 25 | ||||
| 0 | ETAR 12 | 20 | 120kbps | ||
| RETTIMSNART -1 | WELS +SLEW 8 | YLPPUS 15 | 20kbps | ||
| -3 VOUT- | 6 | 10 5 | |||
| -6 | 0 | 0 | |||
| 0 1000 2000 3000 4000 | 5000 150 1000 2000 3000 4000 | 5000 0 | 1000 2000 | 3000 | 4000 5000 |
| LOAD CAPACITANCE (pF) | LOAD CAPACITANCE (pF) | LOAD | CAPACITANCE | (pF) |
数据来源：原厂规格书
电气特性 Electrical Characteristics（TA = 25°C）
| 参数 | 条件 | 最小 | 典型 | 最大 | 单位 |
|---|---|---|---|---|---|
| 3.0V to 5.5V, | Low-Power, up to | 1Mbps, | True | RS-232 | |
| Input Hysteresis | 0.3 | V | |||
| Input Resistance TA = | +25°C | 3 | 5 | 7 | kΩ |
| Output Voltage Swing All | transmitter outputs loaded with 3kΩ to ground | ±5.0 | ±5.4 | V | |
| Output Resistance VCC | = V+ = V- = 0V, TOUT = ±2V | 300 | 10M | Ω | |
| Output Short-Circuit Current | ±35 | ±60 | mA | ||
| Output Leakage Current | ±25 | µA | |||
| Transmitter Output Voltage T3OUT | loaded with 3kΩ to GND, | ±5.0 | V | ||
| Maximum Data Rate RL = | 3kΩ, CL = 1000pF, one transmitter switching tPHL | 120 | 235 0.3 | kbps | |
| Receiver Propagation Delay R_IN | to R_OUT, CL = 150pF tPLH | 0.3 | µs | ||
| Receiver Output Enable Time Normal | operation | 200 | ns | ||
| Receiver Output Disable Time Normal | operation | 200 | ns | ||
| Transmitter Skew | tPHL | - tPLH | | 300 | ns | ||
| Receiver Skew | tPHL | - tPLH | CL = | 150pF to | 300 | ns | |
| VCC | = 3.3V, RL = 3Ω to 7kΩ, 1000pF | 6 | 30 | ||
| Transition-Region Slew Rate +3V | to -3V or -3V to +3V, | V/µs | |||
| TA = | +25°C CL = | 150pF to 4 | 30 | ||
| _______________________________________________________________________________________ | 3 | ||||
| 3.0V to 5.5V, | Low-Power, up to | 1Mbps, | True | RS-232 | |
| Maximum Data Rate | tPHL | 1000 1000 | 0.15 | kbps | |
| Receiver Propagation Delay R_IN | to R_OUT, CL = 150pF tPLH | 0.15 | µs | ||
| Receiver Output Enable Time Normal | operation | 200 | ns | ||
| Receiver Output Disable Time Normal | operation | 200 | ns | ||
| | tPHL | - tPLH |, MBAUD = GND | 100 | ns | ||
| | tPHL | - tPLH |, MBAUD = VCC | 25 | ns | ||
| Receiver Skew | tPHL | - tPLH | | 6 | 50 | 30 | ns |
| Transition-Region Slew Rate +3V | to -3V or -3V to +3V, | 24 | 150 | V/µs | |
| CL = 150pF to | 2500pF, 4 | 30 | |||
| MAX3237: C1–C4 = 0.1µF | tested at 3.3V ±5%; C1–C4 = 0.22µF tested | at 3.3V ±10%; C1 = | 0.047µF, | C2–C4 = 0.33µF | tested |
| __________________________________________Typical | Operating | Characteristics | |||
| MAX3222/MAX3232 | MAX3222/MAX3232 | MAX3222/MAX3232 | |||
| TRANSMITTER OUTPUT VOLTAGE | SLEW RATE | SUPPLY | CURRENT | vs. LOAD | CAPACITANCE |
| vs. LOAD CAPACITANCE | vs. LOAD CAPACITANCE | WHEN | TRANSMITTING | DATA | |
| 6 | 10-2223XAM 22 | 20-2223XAM 40 | 30-2223XAM | ||
| )V( 5 VOUT+ | 20 FOR DATA RATES UP TO | 235kbps | |||
| EGATLOV 4 | 18 | 235kbps | |||
| 3 | 16 | )Am( 30 | |||
| /mV( 14 | TNERRUC 25 | ||||
| 0 | ETAR 12 | 20 | 120kbps | ||
| RETTIMSNART -1 | WELS +SLEW 8 | YLPPUS 15 | 20kbps | ||
| -3 VOUT- | 6 | 10 5 | |||
| -6 | 0 | 0 | |||
| 0 1000 2000 3000 4000 | 5000 150 1000 2000 3000 4000 | 5000 0 | 1000 2000 | 3000 | 4000 5000 |
| LOAD CAPACITANCE (pF) | LOAD CAPACITANCE (pF) | LOAD | CAPACITANCE | (pF) |
订货信息与供货形式
| 型号 | TEMP. | RANGE | PIN-PACKAGE | 型号2 | TEMP.2 | RANGE2 | PIN-PACKAGE2 |
|---|---|---|---|---|---|---|---|
| PART | TEMP. | RANGE | PIN-PACKAGE | PART | TEMP. | RANGE | PIN-PACKAGE |
| MAX3222EUP | -40°C to | +85°C | 20 TSSOP | MAX3232EWE | -40°C to | +85°C | 16 Wide SO |
| MAX3222EAP | -40°C to | +85°C | 20 SSOP | MAX3232EPE | -40°C to | +85°C | 16 Plastic DIP |
| MAX3222EWN | -40°C to | +85°C | 18 SO | MAX3237CAI | 0°C to | +70°C | 28 SSOP |
| MAX3222EPN | -40°C to | +85°C | 18 Plastic DIP | MAX3237EAI | -40°C to | +85°C | 28 SSOP |
| MAX3232CUE | 0°C to | +70°C | 16 TSSOP | MAX3241CAI | 0°C to | +70°C | 28 SSOP |
| MAX3232CSE | 0°C to | +70°C | 16 Narrow SO | MAX3241CWI | 0°C to | +70°C | 28 SO |
| MAX3232CWE | 0°C to | +70°C | 16 Wide SO | MAX3241EUI | -40°C to | +85°C | 28 TSSOP |
| MAX3232CPE | 0°C to | +70°C | 16 Plastic DIP | MAX3241EAI | -40°C to | +85°C | 28 SSOP |
| MAX3232EUE | -40°C to | +85°C | 16 TSSOP | MAX3241EWI | -40°C to | +85°C | 28 SO |
| MAX3232ESE | -40°C to | +85°C | 16 Narrow SO |
应用领域 Applications
产品应用与封装尺寸
图纸取自该型号原厂规格书的应用电路与封装尺寸章节，点击图片可放大查看原始尺寸标注。