ISL3158AEMW INTERSIL [Intersil Corporation], ISL3158AEMW Datasheet

ISL3158AEMW

Manufacturer Part Number

ISL3158AEMW

Description

Manufacturer

INTERSIL [Intersil Corporation]

Datasheet

1.ISL3158AEMW.pdf (16 pages)

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±16.5kV ESD (IEC61000-4-2) Protected,

Large Output Swing, 5V, Full Fail-Safe, 1/8

Unit Load, RS-485/RS-422 Transceiver

The ISL3158AE is a BiCMOS, IEC61000 ESD protected, 5V

powered, single transceiver that meets both the RS-485 and

RS-422 standards for balanced communication. Each driver

output and receiver input is protected against ±16.5kV ESD

strikes without latch-up.

The ISL3158AE transmitter delivers exceptional differential

output voltages (2.4V min), into the RS-485 required 54Ω

load, for better noise immunity or to allow up to eight 120Ω

terminations in “star” or other non-standard bus topologies.

This device has very low bus currents (+125

presents a true “1/8 unit load” to the RS-485 bus. This allows

up to 256 transceivers on the network without violating the

RS-485 specification’s 32 unit load maximum, and without

using repeaters.

Receiver (Rx) inputs feature a “Full Fail-Safe” design, which

ensures a logic high Rx output if Rx inputs are floating,

shorted, or on a terminated but undriven bus. Rx outputs

feature high drive levels - typically 28mA @ V

the design of optocoupled isolated interfaces).

Hot Plug circuitry ensures that the Tx and Rx outputs remain

in a high impedance state until the power supply has

stabilized, and the Tx outputs are fully short circuit protected.

The ISL3158AE is a half duplex version. It multiplexes the

Rx inputs and Tx outputs to allow transceivers with output

disable functions in an 8 Ld package.

ISL3158AEM

ISL3158AEMW

NUMBER

PART

L DUPLEX

HALF/FUL

Half

DATA RATE

(Mbps)

Data Sheet

SLEW-RATE

LIMITED?

A/-75

= 1V (to ease

TABLE 1. SUMMARY OF FEATURES

A), so it

1-888-INTERSIL or 1-888-468-3774

HOT PLUG

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Yes

# DEVICES

ON BUS

Features

• High Driver V

• IEC61000 ESD Protection on RS-485 I/O Pins . . ±16.5kV

• Full Fail-safe (Open, Short, Terminated and Undriven)

• High Rx I

• Hot Plug Circuitry - Tx and Rx Outputs Remain

• True 1/8 Unit Load Allows up to 256 Devices on the Bus

• Specified for Single 5V, 10% Tolerance, Supplies

• High Data Rates . . . . . . . . . . . . . . . . . . . . . up to 10Mbps

• Low Quiescent Supply Current . . . . . . . . . . . . . . . 600

• -7V to +12V Common Mode Input Voltage Range

• Half Duplex Pinouts

• Pb-free (RoHS compliant)

• Three-State Rx and Tx Outputs

• Current Limiting for Driver Overload Protection

Applications

• Utility Meters and Automated Meter Reading Systems

• High Node Count Systems

• PROFIBUS® and Field Bus Networks, and Factory

• Security Camera Networks

• Building Lighting and Environmental Control Systems

• Industrial/Process Control Networks

256

- Better Noise Immunity, or Drive Up to 8 Terminations

- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM

Receivers

Applications

Three-State During Power-up/Power-down

Ultra Low Shutdown Supply Current . . . . . . . . . . . . 70nA

Automation

All other trademarks mentioned are the property of their respective owners.

April 3, 2009

ENABLE?

Intersil (and design) is a registered trademark of Intersil Americas Inc.

Rx/Tx

Yes

to Drive Opto-Couplers for Isolated

. . . . . . . . . . . . . . 2.4V (Min) @ R

QUIESCENT

600

(µA)

SHUTDOWN?

LOW POWER

ISL3158AE

Yes

FN6886.0

COUNT

= 54Ω

N/A

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