PDF《定购信息 应用》

概述 MAX3051用于连接CAN协议控制器和控制器局域网(CAN) 总线的物理连接线.

MAX3051为总线提供具有差分发送 能力、为CAN控制器提供具有差分接收能力.MAX3051 主要针对于用于+3.3V单电源供电的不需要汽车行业标准 (ISO 11898)规定的严格故障保护的应用. MAX3051有四种不同的工作模式:高速、斜率控制、待机 与关断模式.高速模式支持高达1Mbps的数据率;

斜率控 制模式可用于设置收发器的摆率,数据率最高达500kbps, 降低EMI辐射,因此可以使用非屏蔽双绞线或平行电缆;

待机模式下,将发送器关断,拉高接收器,将MAX3051置 于低电流模式;

关断模式下,发送器和接收器均关断. MAX3051输入共模范围为-7V至+12V,超出了ISO?11898 规定的-2V至+7V范围. 这些功能以及可编程摆率限制功能, 使其可理想用于非汽车领域的恶劣环境.MAX3051采用8 引脚SO和SOT23封装,工作在-40°C至+85°C扩展级温度 范围. 应用 打印机JetLink接口 工业控制与网络 电信背板 消费类产品 优势和特性 使用3V微控制器,相同的LDO ? 低压+3.3V单电源供电 共模范围优于ISO11898标准(-2V至+7V) ? -7V至+12V宽共模范围 占用的电路板空间最小 ? SOT23封装 灵活工作模式优化性能和功耗,减少散热 ? 四种工作模式 最高1Mbps的高速工作模式 斜率控制模式降低EMI (最高500kbps) 待机模式 低电流关断模式 可靠的保护提高系统可靠性 ? ±12kV人体模式ESD保护 ? 热关断 ? 限流 典型工作电路在数据资料的最后给出. 本文是英文数据资料的译文,文中可能存在翻译上的不准确或错误.如需进一步确认,请在您的设计中参考英文资料. 有关价格、供货及订购信息,请联络Maxim亚洲销售中心:10800

852 1249 (北中国区),10800

152 1249 (南中国区), 或访问Maxim的中文网站:www.maximintegrated.com/cn. 19-3274;

Rev 3;

2/15 +表示无铅(Pb)/符合RoHS标准的封装. T = 卷带包装. 器件 温度范围 引脚-封装 顶标 MAX3051ESA+ -40°C至+85°C

8 SO ― MAX3051EKA+T -40°C至+85°C

8 SOT23-8 AEKF CANL SHDN RXD

1 +

2 8

7 RS CANH GND VCC TXD SO/SOT23 TOP VIEW

3 4

6 5 MAX3051 定购信息 引脚配置 VCC to GND.0.3V to +6V TXD, RS, SHDN to GND.0.3V to +6V RXD to GND.0.3V to +6V CANH, CANL to GND.7.5V to +12.5V Continuous Power Dissipation (TA = +70°C) 8-Pin SO (derate 5.9mW/°C above +70°C)470mW 8-Pin SOT23 (derate 5.1mW/°C above +70°C)408.2mW Operating Temperature Range.40°C to +85°C Maximum Junction Temperature.150°C Storage Temperature Range.65°C to +150°C Lead Temperature Range (soldering, 10s)300°C Soldering Temperature (reflow)260°C (VCC = +3.3V ±5%, RL = 60Ω, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current IS Dominant

35 70 mA Recessive

2 5 Standby

8 15 ?A Shutdown Current ISHDN VSHDN = VCC, TXD = VCC or unconnected

1 ?A Thermal-Shutdown Threshold VTSH +160 °C Thermal-Shutdown Hysteresis

25 °C TXD INPUT LEVELS High-Level Input Voltage VIH

2 VCC + 0.3V V Low-Level Input Voltage VIL 0.8 V Input Capacitance CIN

5 pF Pullup Resistor RINTXD

50 100 k? CANH, CANL TRANSMITTER Recessive Bus Voltage VCANH, VCANL VTXD = VCC, no load

2 2.3

3 V VTXD = VCC, no load, VRS = VCC (standby mode) -100 +100 mV Off-State Output Leakage -2V <

VCANH, VCANL <

+7V, SHDN = HIGH -250 +250 ?A Input Leakage Current VCC = 0V, VCANH = VCANL = 5V -250 +250 ?A CANH Output Voltage VCANH VTXD = 0V 2.45 V CANL Output Voltage VCANL VTXD = 0V 1.25 V Differential Output (VCANH - VCANL) VTXD = 0V 1.5 3.0 V VTXD = 0V, RL = 45Ω 1.2 3.0 VTXD = VCC, no load -500 +50 mV VTXD = VCC, RL = 60Ω -120 +12 ??2 www.maximintegrated.com/cn Absolute Maximum Ratings Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (VCC = +3.3V ±5%, RL = 60Ω, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CANH Short-Circuit Current ICANHSC -7V ≤ VCANH ≤ 0V -200 mA Minimum foldback current -35 CANL Short-Circuit Current ICANLSC VCC ≤ VCANL ≤ 12V