MAX13412EESA Maxim Integrated Products, MAX13412EESA Datasheet

MAX13412EESA

Manufacturer Part Number

MAX13412EESA

Description

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX13412EESA.pdf (24 pages)

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The MAX13410E–MAX13415E are half-duplex RS-485-/RS-

422-compatible transceivers optimized for isolated appli-

cations. These devices feature an internal low-dropout

regulator (LDO), one driver, and one receiver. The inter-

nal LDO allows the part to operate from an unregulated

power supply of up to 28V. The AutoDirection feature

reduces the number of optical isolators needed in isolat-

ed applications. Other features include enhanced ESD

protection, fail-safe circuitry, slew-rate limiting, and full-

speed operation.

The MAX13410E–MAX13415E internal LDO generates a

5V ±10% power supply that is used to power its internal

circuitry. The MAX13412E–MAX13415E bring the 5V to an

output V

external circuitry with up to 20mA to further reduce exter-

nal components. The MAX13410E/MAX13411E do not

have a 5V output and come in industry-compatible

pinouts. This allows easy replacement in existing designs.

The MAX13410E–MAX13415E feature a 1/8-unit load

receiver input impedance, allowing up to 256 trans-

ceivers on the bus. All driver outputs are ESD protected

using the Human Body Model. These devices also

include fail-safe circuitry (MAX13410E/MAX13411E/

MAX13414E/MAX13415E only), guaranteeing a logic-

high receiver output when the receiver inputs are open

or shorted. The receiver outputs a logic-high when the

transmitter on the terminated bus is disabled (high

impedance).

The MAX13412E/MAX13413E feature Maxim’s propri-

etary AutoDirection control. This architecture eliminates

the need for the DE and RE control signals. In isolated

applications, this reduces the cost and size of the sys-

tem by reducing the number of optical isolators required.

The MAX13410E/MAX13412E/MAX13414E feature

reduced slew-rate drivers that minimize EMI and reduce

reflections caused by improperly terminated cables,

allowing error-free transmission up to 500kbps. The

MAX13411E/MAX13413E/MAX13415E are not slew-rate

limited, allowing transmit speeds up to 16Mbps.

The MAX13410E–MAX13415E are available in an 8-pin

SO package with an exposed paddle to improve power

dissipation, and operate over the extended -40°C to

+85°C temperature range.

19-1058; Rev 0; 11/07

Note: All devices operate over the -40°C to +85°C operating

temperature range.

+ Denotes a lead-free package.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX13410EESA+

MAX13411EESA+

RS-485 Transceiver with Integrated Low-Dropout

REG

PART

that allows the user to power additional

________________________________________________________________ Maxim Integrated Products

PIN-PACKAGE

8 SO-EP*

General Description

Regulator and AutoDirection Control

AutoDirection

Ordering Information/Selector Guide

* EP = Exposed paddle.

Ordering Information/Selector Guide continued at end of data

sheet.

DATA RATE (max)

o Wide +6V to +28V Input Supply Range

o +5V Output Supplies Up to 20mA to External

o Internal LDO

o Low 65µA (typ) Shutdown Supply Current

o Extended ESD Protection

o 1/8-Unit Load, Allowing Up to 256 Transceivers on

o -40°C to +85°C Operating Temperature Range

o Fail-Safe

o Slew-Rate Limited and Full-Speed Versions

o Up to 16Mbps Data Rate on Full-Speed Versions

Pin Configurations continued at end of data sheet.

Isolated RS-485 Interfaces

Utility Meters

*EXPOSED PADDLE CONNECTED TO GROUND

TOP VIEW

Circuitry

the Bus

500kbps

16Mbps

±15kV Human Body Model (MAX13412E/

MAX13413E)

±14kV Human Body Model (MAX13410E/

MAX13411E)

SLEW-RATE LIMITED

MAX13410E

MAX13411E

Pin Configurations

Yes

Industrial Equipment

Telecomm Equipment

*EP

Applications

GND

Features

PKG CODE

S8E+14

Related parts for MAX13412EESA

MAX13412EESA Summary of contents

Page 1

... Note: All devices operate over the -40°C to +85°C operating temperature range. + Denotes a lead-free package. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o Wide +6V to +28V Input Supply Range ...

Page 2

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) V .........................................................................-0.3V to +30V CC RE, DE/RE, DE, DI, RO, V ..................................-0.3V to +6V REG A, B............................................................................-8V to +13V Short-Circuit Duration (RO, A, ...

Page 3

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control ELECTRICAL CHARACTERISTICS (continued +6.0V to +28V MIN MAX PARAMETER Driver Short-Circuit Output Current Driver Short-Circuit-Foldback Output Current RECEIVER Input Current (A and ...

Page 4

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control SWITCHING CHARACTERISTICS–MAX13410E (continued +6.0V to +28V MIN MAX PARAMETER Driver Enable to Output High Driver Enable to Output Low Driver Disable from ...

Page 5

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control SWITCHING CHARACTERISTICS–MAX13411E (continued +6.0V to +28V MIN MAX PARAMETER Driver Enable to Output Low Driver Disable from Output High Driver Disable from ...

Page 6

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control SWITCHING CHARACTERISTICS–MAX13412E (continued +6.0V to +28V MIN MAX PARAMETER Receiver Disable Time from Low Receiver Disable Time from High Receiver Enable Delay ...

Page 7

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control SWITCHING CHARACTERISTICS–MAX13414E (continued +6.0V to +28V MIN MAX PARAMETER Maximum Data Rate Driver Enable to Output High Driver Enable to Output Low ...

Page 8

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control SWITCHING CHARACTERISTICS–MAX13415E (continued +6.0V to +28V MIN MAX PARAMETER Driver Disable from Output Low RECEIVER Receiver Propagation Delay Receiver Output Skew Maximum ...

Page 9

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control (V = +7.5V +25°C, unless otherwise noted RECEIVER OUTPUT HIGH VOLTAGE vs. TEMPERATURE 5 +1mA O 5.2 5.0 4.8 4.6 4.4 4.2 4.0 -40 -15 ...

Page 10

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control (V = +7.5V +25°C, unless otherwise noted RECEIVER PROPAGATION vs.TEMPERATURE (MAX13410E/MAX13412E RPHL RPLH 15 0 -40 - TEMPERATURE (°C) ...

Page 11

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control Figure 1. Driver DC Test Load Figure 2a. Driver-Timing Test Circuit 1/2 ...

Page 12

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control 1 (RO PULLED LOW DIFF 0 10 Figure 3b. Driver Propagation Delays 500Ω ...

Page 13

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control Figure 6. Receiver Propagation Delays 5V 1kΩ 15pF Figure 7. Receiver Enable and Disable Times ______________________________________________________________________________________ Test ...

Page 14

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control PIN MAX13410E/ MAX13412E/ MAX13414E/ MAX13411E MAX13413E MAX13415E 1 — 2 — 3 — — 1 — 2 — 3 — — ...

Page 15

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control Function Tables for the MAX13410E/MAX13411E TRANSMITTING INPUT OUTPUT High impedance High impedance (shutdown) ...

Page 16

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control Detailed Description The MAX13410E–MAX13415E are half-duplex RS-485/ RS-422-compatible transceivers optimized for isolated applications. These devices feature an internal LDO reg- ulator, one driver, and one receiver. The internal LDO allows the ...

Page 17

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control Functional Diagram for the MAX13410E/MAX13411E/MAX13414E/MAX13415E may not be necessary. In these cases, the drive current can be reduced to minimize the die temperature. Minimizing the load on ...

Page 18

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control the MAX13410E–MAX13415E. The circuit-board designer has no control over this parameter. The MAX13410E/MAX13411E/MAX13414E/MAX13415E guarantee a logic-high receiver output when the receiv- er inputs are shorted or open, or when they are ...

Page 19

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control 1MΩ 1500Ω DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 8a. Human Body ESD Test Model ESD Test Conditions ESD ...

Page 20

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control V SYS V SYS MCU AND RELATED CIRCUITRY V SYS Figure 9. Typical Application Circuit for the MAX13410E/MAX13411E transmission line design. In most cases, a single, con- trolled-impedance cable or trace ...

Page 21

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control V SYS MCU AND RELATED CIRCUITRY V SYS Figure 10. Typical Application Circuit for the MAX13412E/MAX13413E ground loops. The typical application circuits show an isolated RS-485 interface using the MAX13410E– MAX13415E. ...

Page 22

RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control V SYS ISO_V V SYS MCU AND RELATED CIRCUITRY V SYS Figure 11. Typical Application Circuit for the MAX13414E/MAX13415E OFF ...

Page 23

... RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control TOP VIEW REG DI 4 *EXPOSED PADDLE CONNECTED TO GROUND PART PIN-PACKAGE MAX13412EESA+ 8 SO-EP* MAX13413EESA+ 8 SO-EP* MAX13414EESA+** 8 SO-EP* MAX13415EESA+** 8 SO-EP* Note: All devices operate over the -40°C to +85°C operating temperature range. + Denotes a lead-free package. ______________________________________________________________________________________ Pin Configurations (continued ...

Page 24

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products ...

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