MAX3535E, MXL1535E +3V to +5V, 2500VRMS Isolated RS-485/RS-422 Transceivers with ±15kV ESD Protection

Description

The MAX3535E/MXL1535E isolated RS-485/RS-422 full-duplex transceivers provide 2500V_RMS of galvanic isolation between the RS-485/RS-422 side and the processor or control logic side. These devices allow fast, 1000kbps communication across an isolation barrier when the common-mode voltages (i.e., the ground potentials) on either side of the barrier are subject to large differences. Isolation is achieved through integrated high-voltage capacitors. The MAX3535E/MXL1535E also feature a 420kHz transformer driver that allows power transfer to the RS-485 side using an external transformer.

The MAX3535E/MXL1535E include one differential driver, one receiver, and internal circuitry to send the RS-485 signals and control signals across the isolation barrier (including the isolation capacitors). The MAX3535E/MXL1535E RS-485 receivers are 1/8 unit load, allowing up to 256 devices on the same bus.

The MAX3535E/MXL1535E feature true fail-safe circuitry. The driver outputs and the receiver inputs are protected from ±15kV electrostatic discharge (ESD) on the interface side, as specified in the Human Body Model (HBM).

The MAX3535E/MXL1535E feature driver slew-rate select that minimizes electromagnetic interference (EMI) and reduces reflections. The driver outputs are short-circuit and overvoltage protected. Other features are hot-swap capability and isolation-barrier fault detection.

The MAX3535E operates with a single +3V to +5.5V power supply. The improved secondary supply range of the MAX3535E allows the use of step-down transformers for +5V operation, resulting in considerable power savings. The MXL1535E operates with a single +4.5V to +5.5V power supply. The MXL1535E is a function-/pin-compatible improvement of the LTC1535. The MAX3535E/MXL1535E are available over the commercial 0°C to +70°C and extended -40°C to +85°C temperature ranges.

An evaluation kit is available: MAX3535EEVKIT

Key Features

Applications/Uses

2500V_RMS RS-485 Bus Isolation Using On-Chip High-Voltage Capacitors
1000kbps Full-Duplex RS-485/RS-422 Communication
+3V to +5.5V Power-Supply Voltage Range (MAX3535E)
+4.5V to +5.5V Power-Supply Voltage Range (MXL1535E)
1/8 Unit Receiver Load, Allowing 256 Devices on Bus
±15kV ESD Protection Using HBM
Pin-Selectable Slew-Rate Limiting Controls EMI
Hot-Swap-Protected Driver-Enable Input
Undervoltage Lockout
Isolation-Barrier Fault Detection
Short-Circuit Protected
Thermal Shutdown
Open-Line and Shorted-Line Fail-Safe Receiver Inputs

	Industrial-Control Local Area Networks
	Isolated RS-485 Systems
	Systems with Large Common-Mode Voltages
	Telecommunications Systems

Key Specifications: RS-422/485 Line Driver/Receivers

Part Number

Tx/Rx

Duplex

V_SUPPLY
(V)

Galvanic Isolation
(±V)

I_CC
(mA)

Data Rate
(kbps)

ESD Protect.
(±kV)

Tx EN

Rx EN

Rx/Tx on Bus

Package/Pins

Price

typ

min

See Notes

MAX3535E

1Tx + 1Rx

Full

3.3

3.0 to 5.5

2500

1000

Yes

256

MXL1535E

See All RS-422/485 Line Driver/Receivers (159)

Diagram

Typical Operating Circuit

Application Notes

Application Note 3776: Considerations for Selecting an RS-485 Transceiver in Electronic Power Meters - MAX3535E

Evaluation Kits

MAX3535EEVKIT

Design Guides

Interface (PDF)

Reliability Reports

Reliability Report: MAX3535E.pdf MXL1535E.pdf

Show FIT data for:

Software/Models

MAX3535E IBIS Model

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-15 of 15

MAX3535E Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

MAX3535EVKIT

Active

Land Pattern: Not Available

See data sheet

MAX3535ECWI+

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M+9*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX3535ECWI+T

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M+9*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX3535EEWI+

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M+9*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX3535EEWI+T

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M+9*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis

MAX3535ECWI

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M-9*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

MAX3535ECWI-T

Active

Land Pattern: Not Available

0°C to +70°C See data sheet

MAX3535EEWI

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M-9*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis

MAX3535EEWI-T

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M-9*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis

MXL1535E Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

MXL1535ECWI

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M-9*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

MXL1535ECWI+

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M+9*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis

MXL1535ECWI+T

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M+9*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis

MXL1535ECWI-T

Active

Land Pattern: Not Available

0°C to +70°C See data sheet

MXL1535EEWI

Active SOIC(W);28 pin;193 mm²
Outline Drawing: 21-0145 (PDF)
Land Pattern: 90-0288 (PDF)
Use pkgcode/variation: W28M-9*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis

MXL1535EEWI-T

Active

Land Pattern: Not Available

-40°C to +85°C See data sheet

More Information

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Description
Key Features
Applications/Uses
Key Specifications
Diagram

Data Sheet
Application Notes
Design Guides
Engineering Journals
Reliability Reports
Software/Models
Evaluation Kits

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Samples
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Document Ref.: 19-3270; Rev 0; 2004-05-21
This page last modified: 2009-01-09