MAX3054ASD データシートの表示（PDF） - Maxim Integrated

部品番号

コンポーネント説明

メーカー

MAX3054ASD

±80V Fault-Protected/Tolerant CAN Transceiver

Maxim Integrated 

±80V Fault-Protected/Tolerant CAN

Transceivers for In-Car Applications

Pin Description

PIN

NAME

FUNCTION

1

INH

Inhibit Output. Inhibit output is for switching an external voltage regulator if a wake-up signal occurs.

2

TXD

Transmit Data Input

3

RXD

Receive Data Output

4

ERR

Error. Wake-up and power-on indication output; active low in normal operating mode when the bus

has a failure and in low-power modes (wake-up signal or power-on standby).

5

STB

Standby. The digital control signal input (active low) defines, together with input signal on pin EN, the

state of the transceiver (in normal and low-power modes).

6

EN

Enable. The digital control signal input defines, together with input signal on pin STB, the state of the

transceiver (in normal and low-power modes).

7

WAKE Wake-Up. Local wake-up signal input; falling and rising edges are both detected.

8

RTH

Termination Resistor. Termination resistor connection for CANH bus.

9

RTL

Termination Resistor. Termination resistor connection for CANL bus.

10

VCC

Supply Voltage. Bypass to ground with a 0.1µF capacitor.

11

CANH High-Level Voltage Bus Line

12

CANL Low-Level Voltage Bus Line

13

GND

Ground

14

BATT Battery Supply. Bypass to ground with a 0.1µF capacitor.

Detailed Description

The MAX3054/MAX3055/MAX3056 interface between

the protocol controller and the physical wires of the bus

lines in a CAN. The devices provide differential transmit

capability and switch to single-wire mode if certain fault

conditions occur (see the Failure Management section).

The MAX3054/MAX3055/MAX3056 guarantee full wake-

up capability during failure modes.

The extended fault-protection range of CANH and

CANL bus lines (±80V) allows for use in 42V automotive

applications. A current-limiting circuit protects the

transmitter output stage against overcurrent faults. This

feature prevents destruction of the transmitter output

stage. If the junction temperature exceeds a value of

approximately +165°C, the transmitter output stages

are disabled. The CANH and CANL lines are also pro-

tected against electrical transients, which can occur in

an automotive environment.

The transceiver provides three low-power modes that

can be entered and exited through pins STB and EN.

An output INH pin can be used for deactivation of an

external voltage regulator.

The MAX3054/MAX3055/MAX3056 are designed to

provide optimal operation for a specified data rate. The

MAX3054 is ideal for high data rates of 250kbps. The

MAX3055 is used for data rates of 125kbps, and the

MAX3056 is designed for 40kbps applications. For the

40kbps and 125kbps versions, the built-in slope-control

feature allows the use of unshielded cables and receiver

input filters guarantee high noise immunity.

Normal Operation Mode

Transmitter

The transmitter converts a single-ended input (TXD)

from the CAN controller to differential outputs for the

bus lines (CANH, CANL).

Receiver

The receiver takes differential input from the bus lines

(CANH, CANL) and converts this data as a single-

ended output (RXD) to the CAN controller. It consists of

a comparator that senses the difference ∆V = (CANH -

CANL) with respect to an internal threshold.

BATT

The main function of BATT is to supply power to the

device when vehicle battery voltage is supplied.

BATT can handle up to +80V making it ideal for 42V

automotive systems allowing power-up of the device

when the ignition is turned on.

______________________________________________________________________________________ 11

Share Link: