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| 型号： | MAX3051EKA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX CAN 3.3V SOT23-8 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | CAN |
| 电源电压： | 3.14 V ~ 3.47 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 标准包装 |
| 其它名称： | MAX3051EKA+TDKR |
MAX3051
+3.3V, 1Mbps, Low-Supply-Current
CAN Transceiver
9
Maxim Integrated
Detailed Description
The MAX3051 interfaces between the CAN protocol
controller and the physical wires of the bus lines in a
CAN. It provides differential transmit capability to the
bus and differential receive capability to the CAN con-
troller. It is primarily intended for +3.3V single-supply
applications that do not require the stringent fault pro-
tection specified by the automotive industry (ISO 11898)
The MAX3051 features four different modes of opera-
tion: high-speed, slope-control, standby, and shutdown
mode. High-speed mode allows data rates up to
1Mbps. The slope-control mode can be used to pro-
gram the slew rate of the transmitter for data rates of up
to 500kbps. This reduces the effects of EMI, thus allow-
ing the use of unshielded twisted or parallel cable. In
standby mode, the transmitter is shut off and the
receiver is pulled high, placing the MAX3051 in low-
current mode. In shutdown mode, the transmitter and
receiver are switched off.
The MAX3051 input common-mode range is from -7V to
+12V, exceeding the ISO 11898 specification of -2V to
+7V. These features, and the programmable slew-rate
limiting, make the part ideal for nonautomotive, harsh
environments.
The transceivers operate from a single +3.3V supply
and draw 35A of supply current in dominant state and
2A in recessive state. In standby mode, supply cur-
rent is reduced to 8A. In shutdown mode, supply cur-
rent is less than 1A.
CANH and CANL are output short-circuit current limited
and are protected against excessive power dissipation
by thermal-shutdown circuitry that places the driver
outputs into a high-impedance state.
Transmitter
The transmitter converts a single-ended input (TXD)
from the CAN controller to differential outputs for the
bus lines (CANH, CANL). The truth table for the trans-
mitter and receiver is given in Table 1.
Receiver
The receiver reads differential inputs from the bus lines
(CANH, CANL) and transfers this data as a single-
ended output (RXD) to the CAN controller. It consists of
a comparator that senses the difference VDIFF = (CANH
- CANL) with respect to an internal threshold of +0.75V.
If this VDIFF is greater than 0.75, a logic-low is present at
RXD. If VDIFF is less than 0.75V, a logic-high is present.
The receiver always echoes the CAN BUS data.
The CANH and CANL common-mode range is -7V to
+12V. RXD is logic-high when CANH and CANL are
shorted or terminated and undriven.
Mode Selection
High-Speed Mode
Connect RS to ground to set the MAX3051 to high-
speed mode. When operating in high-speed mode, the
MAX3051 can achieve transmission rates of up to
1Mbps. In high-speed mode, use shielded twisted pair
cable to avoid EMI problems.
Slope-Control Mode
Connect a resistor from RS to ground to select slope-
control mode (Table 2). In slope-control mode, CANH
and CANL slew rates are controlled by the resistor con-
nected to the RS pin. Maximum transmission speeds
are controlled by RRS and range from 40kbps to
500kbps. Controlling the rise and fall slopes reduces
EMI and allows the use of an unshielded twisted pair or
a parallel pair of wires as bus lines. The equation for
selecting the resistor value is given by:
RRS (k
) ≈ 12000 / (maximum speed in kbps)
See the Slew Rate vs. RRS graph in the
Typical
Operating Characteristics.
Standby Mode
If a logic-high is applied to RS, the MAX3051 enters a
low-current standby mode. In this mode, the transmitter
TXD
RS
SHDN
CANH
CANL
BUS STATE
RXD
Low
VRS < 0.75 x
VCC
Low
High
Low
Dominant
Low
High or float
VRS < 0.75 x
VCC
Low
5k
to 25k to
VCC / 2
5k
to 25k to
VCC / 2
Recessive
High
X
VRS > 0.75 x
VCC
Low
5k
to 25k to
GND
5k
to 25k to
GND
Recessive
High
X
High
Unconnected
High
Table 1. Transmitter and Receiver Truth Table When Not Connected to the Bus
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3051ESA | 功能描述:CAN 接口集成电路 RoHS:否 制造商:Texas Instruments 类型:Transceivers 工作电源电压:5 V 电源电流: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX3051ESA+ | 功能描述:CAN 接口集成电路 3.3V 1Mbps Transceiver RoHS:否 制造商:Texas Instruments 类型:Transceivers 工作电源电压:5 V 电源电流: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX3051ESA+T | 功能描述:CAN 接口集成电路 3.3V 1Mbps Transceiver RoHS:否 制造商:Texas Instruments 类型:Transceivers 工作电源电压:5 V 电源电流: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX3051ESA-T | 功能描述:CAN 接口集成电路 RoHS:否 制造商:Texas Instruments 类型:Transceivers 工作电源电压:5 V 电源电流: 工作温度范围:- 40 C to + 85 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX3053ASA | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
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