MAXIM MAX13051 User Manual

General Description

The MAX13051 ±80V fault-protected CAN transceiver
with autobaud is ideal for device net and other industri­al network applications where overvoltage protection is
required. The MAX13051 provides a link between the
CAN protocol controller and the physical wires of the
bus lines in a control area network (CAN).

The MAX13051 features three different modes of opera­tion: high speed, slope control, and standby. High­speed mode allows data rates up to 1Mbps. The
slope-control mode can be used to program the slew
rate of the transmitter for data rates of up to 500kbps,
reducing the effects of EMI and allowing the use of
unshielded-twisted or parallel cable. In standby mode,
the transmitter shuts off and a low-power receiver moni­tors the bus, waiting for a wake-up signal.

The MAX13051 provides a transmitter data (TXD) domi­nant timeout function that prevents erroneous CAN con­trollers from clamping the bus to a dominant level if the
TXD input is held low for greater than 1ms. The
MAX13051 also provides an autobaud feature allowing
the microcontroller to compute the incoming baud rate
without destroying CAN protocol communication. The
MAX13051 input common-mode range is greater than
±12V, exceeding the ISO 11898 specification of -2V to
+7V, and features ±6kV Human Body Model protection,
making these devices ideal for harsh environments. The
MAX13051 is available in an 8-pin SO package and is
specified from the -40°C to +85°C and -40°C to +125°C
temperature ranges.

Applications

Industrial Networks

Device Net Nodes

Telecom

HVAC

Features

♦ Fully Compatible with the ISO 11898 Standard

♦ Autobaud Mode

♦ Short-Circuit Protection

♦ High-Speed Operation Up to 1Mbps

♦ Slope-Control Mode

♦ Low-Current Standby Mode

♦ Thermal Shutdown

♦ Transmit Data Dominant Timeout

♦ ±6kV Human Body Model ESD Protection

♦ Greater than ±12V Common-Mode Range

MAX13051

±80V Fault-Protected Can Transceiver

with Autobaud

________________________________________________________________ Maxim Integrated Products 1

19-3500; Rev 0; 11/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

CANL

AUTOBAUDRXD

1

2

87RS

CANHGND

V

CC

TXD

SO

TOP VIEW

3

4

6

5

MAX13051

Pin Configuration

Typical Operating Circuit

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX13051ESA -40°C to +85°C 8 SO

MAX13051ASA -40°C to +125°C 8 SO

CAN

CONTROLLER

GND GND

V

CC

0.1µF

TX0

RX0

I/O

I/O

16kΩ TO 200kΩ

V

CC

TXD

RXD

AUTOBAUD

RS

CANH

MAX13051

CANL

120Ω

120Ω

MAX13051

±80V Fault-Protected Can Transceiver
with Autobaud

2 _______________________________________________________________________________________

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.

(All voltages referenced to GND.)
V

CC .......................................................................................

-0.3V to +6V

RS...............................................................-0.3V to (V

CC

+ 0.3V)

TXD, RXD, AUTOBAUD............................................-0.3V to +6V

CANH, CANL .......................................................................±80V

Continuous Power Dissipation (T

A

= +70°C)

8-Pin SO (derate 5.9mW/°C above +70°C) .................470mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................+300°C

DC ELECTRICAL CHARACTERISTICS

(V

CC

= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V, TA= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Current I

Standby Current I

Thermal-Shutdown Threshold V

Thermal-Shutdown Hysteresis 13 °C

INPUT LEVELS (TXD, AUTOBAUD)

High-Level Input Voltage V

Low-Level Input Voltage V

High-Level Input Current I

Low-Level Input Current I

Input Capacitance C

CANH, CANL TRANSMITTER

Recessive Bus Voltage

Recessive Output Current

CANH Output Voltage V

CANL Output Voltage V

Matching Between CANH and CANL
Output Voltage

Differential Output
(V

CANH

- V

CANL

)

CANH Short-Circuit Current I

CC

STANDBY

TSH

IH

IL

IH

IL

IN

V

CANH

V

CANL Standby mode, no load -100 +100 mV

I

CANH

I

CANL -32V < V

CANH

CANL

∆DOM

V

DIFF

CANHSCVCANH

CANLSC

Dominant, RL = 60Ω 72

Recessive 15

V

= V

TXD

V

AUTOBAUD

V

= GND -300 -100

TXD

V

AUTOBAUD

Normal mode, V

,

-76V < V

,

V

= 0, dominant 3.0 4.5 V

TXD

V

= 0, dominant 0.50 1.75 V

TXD

V

= 0, dominant, TA = +25°C

TXD

(V

CANH

Dominant, V

Recessive, V

V

= 5V, V

CANL

V

= 40V, V

CANL

V

= 76V, V

CANL

+165 °C

2V

CC

= V

CC

-5 +5

+5 +15

= GND -5 +5

10 pF

= VCC, no load 2 3 V

TXD

, V

CANH

CANH

+ V

= 0, V

CANL

TXD

TXD

TXD

< +76V ±3

CANL

, V

< +32V -2.5 +2.5

CANL

) -V

CC

-100 +150 mV

= 0, 45Ω < RL < 60Ω 1.5 3.0 V

= VCC, no load -50 +50 mV

= 0 -100 -70 -45 mA

= 0 40 60 90

TXD

= 0 40 60 90CANL Short-Circuit Current I

TXD

= 0 63

TXD

25 µA

0.8 V

mA

µA

µA

mA

mA

MAX13051

±80V Fault-Protected Can Transceiver

with Autobaud

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(V

CC

= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V, TA= +25°C.) (Note 1)

)

TIMING CHARACTERISTICS

(VCC= +5V ±5%, RL= 60Ω, CL= 100pF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RXD OUTPUT LEVELS

RXD High Output Voltage Level V

RXD Low Output Voltage Level

DC BUS RECEIVER (V

Differential Input Voltage V

Differential Input Hysteresis V

Common-Mode Input Resistance R

Matching Between CANH and CANL
Common-Mode Input Resistance

Differential Input Resistance R

Common-Mode Input Capacitance V

Differential Input Capacitance V

Input Leakage Current I

SLOPE CONTROL (RS )

Input Voltage for High-Speed Mode V

Input Voltage for Standby V

Slope-Control Mode Voltage V

High-Speed Mode Current I

= VCC, CANH and CANL externally driven)

TXD

OH

V

OL

DIFF

DIFF (HYST

ICM

R

IC_MATCH

DIFF

LI

IL_RS

IH_RS

SLOPE

IL_RS

I = -100µA 0.8 x V

I = 5mA 0.4 V

-12V < V

-12V < V

Normal mode, -12V < V

Normal or standby mode,
V

CANH

Normal or standby mode,
V

CANH

= V

TXD

= V

TXD

V

= 0, V

CC

-200µA < IRS < 10µA 0.4 x V

VRS = 0 -500 µA

< +12V 0.5 0.7 0.9

CM

< +12V, standby mode 0.5 1.1

CM

= V

- V

CANL

CANL

CC

CC

CANH

= ±12V

= 1V

= V

CC

< +12V 70 mV

CM

V

15 35 kΩ

-3 +3 %

25 75 kΩ

20 pF

10 pF

= 5V -5 +5 µA

CANL

0.3 x V

0.75 x V

CC

CC

0.6 x V

CC

CC

CC

V

V

V

V

V

Delay TXD to Bus Active t

Delay TXD to Bus Inactive t

Delay Bus to Receiver Active t

Delay Bus to Receiver Inactive

Delay TXD to RXD Active t

Delay TXD to RXD Inactive T

Delay TXD to RXD Active (Dominant
Loop Delay) Slew-Rate Controlled

Delay TXD to RXD Inactive (Loop
Delay) Slew-Rate Controlled

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

t

ONLOOP_S

t

OFFLOOP_S

ONTXD

OFFTXD

ONRXD

t

OFFRXD

ONLOOPVRS

OFFLOOPVRS

V

RS

V

RS

V

RS

V

RS

RRS = 24kΩ (500kbps) 280 450 ns

RRS = 100kΩ (125kbps) 0.82 1.6

RRS = 180kΩ (62.5kbps) 1.37 5

RRS = 24kΩ (500kbps) 386 600 ns

RRS = 100kΩ (125kbps) 0.74 1.6

RRS = 180kΩ (62.5kbps) 0.97 5

= 0 (Figure 1) 66 110 ns

= 0 (Figure 1) 61 95 ns

= 0 (Figure 1) 54 115 ns

= 0 (Figure 1) 46 160 ns

= 0 (Figure 1) 121 255 ns

= 0 (Figure 1) 108 255 ns

µs

µs

MAX13051

±80V Fault-Protected Can Transceiver
with Autobaud

4 _______________________________________________________________________________________

Note 1: All currents into device are positive and all currents out of the device are negative. All voltages are referenced to device

ground unless otherwise noted.

TIMING CHARACTERISTICS (continued)

(VCC= +5V ±5%, RL= 60Ω, CL= 100pF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

Figure 1. Timing Diagram

Timing Diagrams

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Differential-Output Slew Rate

Dominant Time for Wake-Up Through
Bus (Figure 2)

TXD Dominant Timeout t

ESD Protection Human Body Model (CANH, CANL) 6 kV

TXD

|SR|

t

WAKE

DOM

RRS = 24kΩ (500kbps) 10

RRS = 100kΩ (125kbps) 2.7

RRS = 180kΩ (62.5kbps) 1.6

Standby mode, V

V

= 0 0.3 0.6 1.0 ms

TXD

= 3V 0.75 1.5 3.00 µs

DIFF

V/µs

V

DIFF

RXD

t

ONTXD

t

ONLOOP

0.9V

t

ONRXD

0.3 x V

DOMINANT

0.5V

RECESSIVE

0.7 x V

CC

CC

t

OFFTXD

t

OFFRXD

t

OFFLOOP