ON Semiconductor NCV7341 User Manual

NCV7341

High Speed Low Power CAN
Transceiver

The NCV7341 CAN transceiver is the interface between a
controller area network (CAN) protocol controller and the physical
bus and may be used in both 12 V and 24 V systems. The transceiver
provides differential transmit capability to the bus and differential
receive capability to the CAN controller.

Due to the wide common−mode voltage range of the receiver inputs,
the NCV7341 is able to reach outstanding levels of electromagnetic
susceptibility (EMS). Similarly, extremely low electromagnetic
emission (EME) is achieved by the excellent matching of the output
signals.

The NCV7341 is a new addition to the ON Semiconductor CAN
high−speed transceiver family and offers the following additional
features:

Features

• Ideal Passive Behavior when Supply Voltage is Removed

• Separate V

to CAN Controllers and Microcontrollers with Different Supply
Levels

• Fully Compatible with the ISO 11898 Standard

• High Speed (up to 1 Mb)

• Very Low Electromagnetic Emission (EME)

• V

SPLIT

Split Termination is Used (Further Improvement of EME)

• Differential Receiver with High Common−Mode Range for

Electromagnetic Immunity (EMI)

• Up to 110 Nodes can be Connected in Function of the Bus Topology

• Transmit Data (TxD) Dominant Time−out Function

• Bus Error Detection with Version NCV7341D20

• Bus Pins Protected Against Transients in Automotive Environments

• Bus Pins and Pin V

• Thermally Protected

• NCV Prefix for Automotive and Other Applications Requiring Site

and Change Controls

• These are Pb−Free Devices*

Supply for Digital Interface Allowing Communication

IO

Voltage Source for Stabilizing the Recessive Bus Level if

Short−Circuit Proof to Battery and Ground

SPLIT

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PIN ASSIGNMENT

TxD

GND

2

V

CC

3

RxD

4

V

IO

5

6

EN WAKE

INH

7

NCV7341

(Top View)

141

13

12

11

10

9

8

PC20060727.1

STB

CANH

CANL

V

SPLIT

VBAT

ERR

ORDERING INFORMATION

See detailed ordering and shipping information in the package
dimensions section on page 17 of this data sheet.

Typical Applications

• Automotive

• Industrial Networks

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.

© Semiconductor Components Industries, LLC, 2009

May, 2009 − Rev. 4

1 Publication Order Number:

NCV7341/D

NCV7341

Table 1. TECHNICAL CHARACTERISTICS

Symbol Parameter Condition Max Max Unit

V

CC

V

IO

V

EN

V

STB

V

TxD

V

RxD

V

ERR

V

CANH

V

CANL

V

SPLIT

V

O(dif)(bus_dom)

CM

range

C

load

t

pd(rec−dom)

t

pd(dom−rec)

T

J

ESD

HBM

Supply Voltage for the Core Circuitry 4.75 5.25 V

Supply Voltage for the Digital Interface 2.8 5.25 V

DC Voltage at Pin EN −0.3 VIO + 0.3 V

DC Voltage at Pin STB −0.3 VIO + 0.3 V

DC Voltage at Pin TxD −0.3 VIO + 0.3 V

DC Voltage at Pin RxD −0.3 VIO + 0.3 V

DC Voltage at Pin ERR −0.3 VIO + 0.3 V

DC Voltage at Pin CANH 0 < VCC < 5.25 V; No Time Limit −58 +58 V

DC Voltage at Pin CANL 0 < VCC < 5.25 V; No Time Limit −58 +58 V

DC Voltage at Pin V

SPLIT

Differential Bus Output Voltage in Dominant

0 < VCC < 5.25 V; No time Limit −58 +58 V

42.5 W < RLT < 60 W

1.5 3 V

State

Input Common−Mode Range for Comparator Guaranteed Differential Receiver

−35 +35 V

Threshold and Leakage Current

Load Capacitance on IC Outputs 15 pF

Propagation Delay TxD to RxD See Figure 6 90 230 ns

Propagation Delay TxD to RxD See Figure 6 90 245 ns

Junction Temperature −40 150 °C

ESD Level, Human Body Model Pins CANH, CANL, V

WAKE, V

other Pins

BAT

SPLIT

,

−4

−3

4
3

kV

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2

BLOCK DIAGRAM

NCV7341

TxD

EN

STB

ERR

RxD

1

6

14

8

4

VIO

VIO

VIO

VIO

5

Level

shifter

7

Timer

Digital

Control

Block

VBATINH

10

POR

Thermal

shutdown

Driver

control

Wake −up

Filter

Clock

VCC

3

VCC

V

SPLIT

Rec

Low Power

Rec

VCC/2

”Active”

26 kW

12

13

11

CANH

VSPLIT

CANL

26 kW

WAKE

VIO

+

−

9

PC20060921.1

NCV7341

Figure 1. Block Diagram

”Active”

2

GND

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3

TYPICAL APPLICATION SCHEMATICS

NCV7341

100nF

VCC

CAN

controller

x mF*

TxD

EN

STB

RxD

ERR

OUT

100 nF

5

3710

1

6

14

4

8

5V−Reg

VCC

NCV7341

2

VBATINHVio

13

11

12

9

IN

WAKE

2.7 kW

CANH

V

SPLIT

CANL

1kW

RLT=60W

GND GND

Note (*): Value depending on regulator

Figure 2. Application Diagram with a 5V CAN Controller

OUT IN

x mF*

100 nF

controller

3V−reg

x mF*

Vcc

CAN

GND GND

TxD

EN

STB

RxD

ERR

Vio

5

1

6

14

4

8

OUT

100 nF

Vcc

37

5V−reg

INH

NCV7341

2

VBAT

10

13

11

12

9

IN

WAKE

2.7 kW

CANH

V

SPLIT

CANL

1kW

10 nF

RLT=60W

10 nF

RLT=60W

PC20060921.4

R

=60W

LT

180 kW

10 nF

CLT= 4.7 nF

180 kW

10 nF

C

= 4.7 nF

LT

VBAT

CAN
BUS

VBAT

CAN
BUS

Note (*): Value depending on regulator

Figure 3. Application Diagram with a 3V CAN Controller

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4

PC20060921.4

PIN DESCRIPTION

NCV7341

TxD

GND

2

V

CC

3

RxD

4

V

IO

5

6

EN WAKE

INH

7

NCV7341

141

13

12

11

10

9

8

PC20060727.1

STB

CANH

CANL

V

SPLIT

VBAT

ERR

Figure 4. NCV7340 Pin Assignment

Table 2. PIN DESCRIPTION

Pin Name Description

1 TxD Transmit data input; low level = dominant on the bus; internal pull−up current

2 GND Ground

3 V

4 RxD Receive data output; dominant bus => low output

5 V

6 EN Enable input; internal pull−down current

7 INH High voltage output for controlling external voltage regulators

8

ERR Digital output indicating errors and power−up; active low

9 WAKE Local wake−up input

10 V

11 V

SPLIT

12 CANL Low−level CAN bus line (low in dominant)

13 CANH High−level CAN bus line (high in dominant)

14 STB Stand−by mode control input; internal pull−down current

Supply voltage for the core circuitry and the transceiver

CC

Supply voltage for the CAN controller interface

IO

Battery supply connection

BAT

Common−mode stabilization output

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5

NCV7341

FUNCTIONAL DESCRIPTION

OPERATING MODES

Operation modes of NCV7341 are shown in Figures 5 and in Table 3.

SLEEP

MODE

POWER

UP

STB = L

and

flags set

VCC/VIO undervoltage flag reset

RECEIVE

STB = H

and

EN = L

(EN = L or flags set)

STANDBY

STB = H and EN = L

and

ONLY

MODE

STB = H

and

EN = L

STB = L

and

MODE

STB = H

and

EN = H

STB = H

and

EN = L

STB = L

and

EN = L

STB = L and EN = H

and

flags reset

STB = H and EN = H

and

VCC/VIO undervoltage flag reset

NORMAL

MODE

STB = H

and

EN = H

STB = H

and

EN = H

STB = L and EN = H

and

flags reset

GOTO

SLEEP

MODE

STB = L

and

EN = H

flags reset

and

t > t

h(min)

STB = L

and

(EN = L or flags set)

LEGEND

”Flags set” : wake−up or power−up
”Flags reset” : not (wake−up or power−up)

Figure 5. Operation Modes

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6

PC20060921.2