Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - transceivers CAN 1/1 SOIC 8 N

General Description

The MAX3050/MAX3057 interface between the CAN

protocol controller and the physical wires of the bus

lines in a controller area network (CAN). They are pri-

marily intended for automotive systems requiring data

rates up to 2Mbps and feature ±80V fault protection

against short circuits in high-voltage power buses. They

provide differential transmit capability to the bus and

differential receive capability to the CAN controller.

The MAX3050/MAX3057 have four modes of operation:

high speed, slope control, standby, and shutdown.

High-speed mode allows data rates up to 2Mbps. In

slope-control mode, data rates are 40kbps to 500kbps,

so the effects of EMI are reduced, and unshielded

twisted or parallel cable can be used. In standby mode,

the transmitters are shut off and the receivers are put

into low-current mode. In shutdown mode, the transmit-

ter and receiver are switched off.

The MAX3050 has an AutoShutdown™ function that

puts the device into a 15µA shutdown mode when the

bus or CAN controller is inactive for 4ms or longer.

The MAX3050/MAX3057 are available in an 8-pin SO

package and are specified for operation from -40°C to

+125°C.

Applications

Automotive Systems

HVAC Controls

Telecom 72V systems

Features

♦ ±80V Fault Protection for 42V Systems

♦ Four Operating Modes

High-Speed Operation Up to 2Mbps

Slope-Control Mode to Reduce EMI

(40kbps to 500kbps)

Standby Mode

Low-Current Shutdown Mode

♦ AutoShutdown when Device Is Inactive

(MAX3050)

♦ Automatic Wake-Up from Shutdown (MAX3050)

♦ Thermal Shutdown

♦ Current Limiting

♦ Fully Compatible with the ISO 11898 Standard*

MAX3050/MAX3057

±80V Fault-Protected, 2Mbps, Low Supply

Current CAN Transceivers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

MAX3050

MAX3057

CAN

CONTROLLER

TXD

RXD

GND

CANH

CANL

(100nF)

120Ω

TX0

RX0

GND

0.1µF

30pF

24kΩ TO 180kΩ

SHDN

( ) ARE FOR 3050 ONLY.

Typical Operating Circuit

19-2670; Rev 0; 10/02

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.

PART TEMP RANGE PIN-PACKAGE

MAX3050ASA -40°C to +125°C 8 SO

MAX3057ASA -40°C to +125°C 8 SO

CANL

RXD

CANHGND

TXD

TOP VIEW

MAX3050

MAX3057

SHDN

Pin Configuration

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

* Pending completion of testing.

Summary of content (12 pages)

PAGE 1
9-2670; Rev 0; 10/02 ±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers The MAX3050 has an AutoShutdown™ function that puts the device into a 15µA shutdown mode when the bus or CAN controller is inactive for 4ms or longer. The MAX3050/MAX3057 are available in an 8-pin SO package and are specified for operation from -40°C to +125°C.
PAGE 2
MAX3050/MAX3057 ±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers ABSOLUTE MAXIMUM RATINGS VCC to GND ............................................................ -0.3V to +6V TXD, RS, RXD, SHDN to GND ....................-0.3V to (VCC + 0.3V) CANH, CANL to GND..............................................-80V to +80V RXD Shorted to GND................................................. Continuous Continuous Power Dissipation (TA = +70°C) 8-Pin SO (derate 5.9mW/°C above +70°C) ................
PAGE 3
±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers (VCC = +5V ±10%, RL = 60Ω, RS = GND, TA = TMIN to TMAX. Typical values are at VCC = +5V and TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC BUS RECEIVER (VTXD = VCC; CANH and CANL externally driven; -2V < VCANH, VCANL < +7V, unless otherwise specified) Differential Input Voltage (Recessive) VDIFF -7V < VCANH, VCANL < +12V -1.0 +0.5 V Differential Input Voltage (Dominant) VDIFF -7V < VCANH, VCANL < +12V 0.9 3.
PAGE 4
MAX3050/MAX3057 ±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers TIMING CHARACTERISTICS (VCC = +5V ±10%, RL = 60Ω, CL = 100pF, TA = TMIN to TMAX. Typical values are at VCC = +5V and TA = +25°C.) (Figures 1, 2, and 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS TIMING VRS = 0 (2Mbps) Minimum Bit Time tBIT 2 RRS = 100kΩ (125kbps) 8 RRS = 180kΩ (62.
PAGE 5
±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers MAX3050/MAX3057 120Ω VCC 0.1µF VCC CAN CONTROLLER CANH 100pF TX0 MAX3050 MAX3057 CANL TXD RX0 RXD (100nF) SHDN 30pF RS GND GND 120Ω 24kΩ TO 180kΩ ( ) ARE FOR MAX3050 ONLY. Figure 1. AC Test Circuit TXD 9V CANH CANH CANL DOMINANT VSHDN = 2V 0.9V CANH - CANL 0.5V RECESSIVE VCC/2 RXD VSHDN VCC/2 tONTXD tOFFTXD tONRXD tOFFRXD Figure 2. Timing Diagram for Dynamic Characteristics tWAKE Figure 3.
PAGE 6
Typical Operating Characteristics (VCC = 5V, RL = 60Ω, CL = 100pF, TA = +25°C, unless otherwise specified.) MAX3057 SLEW RATE vs. RRS MAX3050 AutoShutdown vs. CSHDN SLEEP TIME (ms) 15 TA = +25°C 10 TA = -+125°C 5 40 48 86 124 162 200 MAX3050 toc03 29 TA = -40°C 25 100 0 200 300 0 400 400 800 1200 1600 CSHDN (nF) DATA RATE (kbps) RECEIVER PROPAGATION DELAY vs. TEMPERATURE, RRS = GND DRIVER PROPAGATION DELAY vs. TEMPERATURE, RRS = GND RECEIVER OUTPUT LOW vs.
PAGE 7
±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers LOOPBACK PROPAGATION DELAY vs.
PAGE 8
MAX3050/MAX3057 ±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers The transceivers are designed to operate from a single +5V supply and draw 56mA of supply current in dominant state and 3.6mA in recessive state. In standby mode, supply current is reduced to 125µA. In shutdown mode, supply current is 15µA.
PAGE 9
±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers TXD RS SHDN CANH CANL BUS STATE RXD 0 VRS < 0.75 ✕ VCC V S HDN > 1.5V High Low Dominant* 0 1 or float VRS < 0.75 ✕ VCC V S HDN > 1.5V Recessive* 1 X VRS > 0.75 ✕ VCC X Floating Floating Floating 1 X X V S H D N < 0.5V Floating Floating Floating 1 5kΩ to 25kΩ to VCC/2 5kΩ to 25kΩ to VCC/2 X = Don’t care. *As defined by ISO, bus value is one of two complementary logical values: dominant or recessive.
PAGE 10
MAX3050/MAX3057 ±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers AutoShutdown (MAX3050) To manage power consumption, AutoShutdown puts the device into shutdown mode after the device has been inactive for a period of time. The value of an external capacitor (C SHDN) connected to SHDN determines the threshold of inactivity time, after which the AutoShutdown triggers. Floating SHDN allows the MAX3050 to automatically change from active mode to shutdown.
PAGE 11
±80V Fault-Protected, 2Mbps, Low Supply Current CAN Transceivers CANH - CANL 1V/div FFT 200mV/div FFT 200mV/div Figure 8. FFT Recessive Bus at 500kbps Figure 10. FFT Recessive Bus at 62.5kbps Applications Information CANH - CANL 1V/div Reduced EMI and Reflections In slope-control mode, the CANH and CANL outputs are slew-rate limited, minimizing EMI and reducing reflections caused by improperly terminated cables.
PAGE 12
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .