1 Features

1? Maximum Signaling Rate: 50 Mbps (With 5-V

Supplies)

? Robust Design With Integrated Noise Filter

? Default Output Low Option (Suffix F)

? Low Power Consumption, Typical ICC per Channel

(With 3.3-V Supplies):

– ISO7131: 1.5 mA at 1 Mbps,

2.6 mA at 25 Mbps

– ISO7140: 1 mA at 1 Mbps,

2.3 mA at 25 Mbps

– ISO7141: 1.3 mA at 1 Mbps,

2.6 mA at 25 Mbps

? Low Propagation Delay: 23-ns Typical

(3.3-V Supplies)

? Wide Temperature Range: –40°C to 125°C

? 50-kV/μs Transient Immunity, Typical

? Long Life With SiO2 Isolation Barrier

? Operates from 2.7-V, 3.3-V, and 5-V Supply and

Logic Levels

? Small QSOP-16 Package

? Safety and Regulatory Approvals

– 2500-V RMS Isolation for 1 minute per UL 1577

– 4242-V PK Isolation per DIN V VDE V 0884-10

(VDE V 0884-10):2006-12, 566 V PK Working

Voltage

– CSA Component Acceptance Notice 5A, IEC

60950-1 and IEC 61010-1 End Equipment

Standards

– CQC Certification per GB 4943.1-2011

2 Applications

? General-Purpose Isolation

– Industrial Fieldbus

– Profibus

– Modbus?

– DeviceNet Data Buses

– RS-232, RS-485

– Serial Peripheral Interface

3 Description

ISO7131, ISO7140, and ISO7141 devices provide

galvanic isolation up to 2500 VRMS for 1 minute per

UL and 4242 VPK per VDE. ISO7131 has three

channels with two forward and one reverse-direction

channels. ISO7140 and ISO7141 are quad-channel

isolators; ISO7140 has four forward channels,

ISO7141 has three forward and one reverse-direction

channels. These devices are capable of 50-Mbps

maximum data rate with 5-V supplies and 40-Mbps

maximum data rate with 3.3-V or 2.7-V supplies, with

integrated filters on the inputs for noise-prone

applications. The suffix F indicates that default output

state is low; otherwise, the default output state is high

(see Table 3).

Each isolation channel has a logic input and output

buffer separated by a silicon dioxide (SiO2) insulation

barrier. Used with isolated power supplies, these

devices prevent noise currents on a data bus or other

circuits from entering the local ground and interfering

with or damaging sensitive circuitry. The devices

have TTL input thresholds and can operate from 2.7- V, 3.3-V, and 5-V supplies. All inputs are 5-V tolerant

when supplied from a 2.7-V or 3.3-V supply.