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1 Features

1? Signaling Rate: 150 Mbps (M-Grade), 25 Mbps

(C-Grade)

? Robust Design with Integrated Noise Filter

(C-Grade)

? Low Power Consumption, Typical ICC per Channel

(3.3-V Supplies):

– ISO7631FM: 2 mA at 10 Mbps

– ISO7631FC: 1.5 mA at 10 Mbps

– ISO7641FC: 1.3 mA at 10 Mbps

? Extremely-Low ICC_disable (C-Grade)

? Low Propagation Delay: 7 ns Typical (M-Grade)

? Output Defaults to Low-State in Fail-Safe Mode

? 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 (M-Grade), 3.3-V and 5-V

Supply and Logic Levels

? 2.7-V (M-Grade), 3.3-V and 5-V Level Translation

? Wide Body SOIC-16 Package

? Safety and Regulatory Approvals

– 2500 VRMS Isolation for 1 Minute per UL 1577

– 4242 VPK Basic Insulation per DIN V VDE V

0884-10 and DIN EN 61010-1

– CSA Component Acceptance Notice 5A, IEC

60950-1 and IEC 61010-1 End Equipment

Standards

– CQC Certification per GB4943.1-2011

– TUV 3000 VRMS Reinforced Insulation

according to EN/UL/CSA 60950-1 and

EN/UL/CSA 61010-1

2 Applications

? Optocoupler Replacement in:

– Industrial Fieldbus

– Profibus

– Modbus

– DeviceNet? Data Buses

– Servo Control Interface

– Motor Control

– Power Supplies

– Battery Packs

3 Description

The ISO7631F and ISO7641F devices provide

galvanic isolation up to 4242 VPK per VDE. The

ISO7631F device has three channels, two of which

operate in the forward direction and one which

operates in the reverse direction. The ISO7641F

device has 4 channels, three of which operate in the

forward direction and one of which operates in the

reverse direction. Suffix F indicates that output

defaults to low-state in fail-safe conditions (see ). MGrade

devices are high-speed isolators capable of up

to150-Mbps data rates with fast propagation delays,

whereas C-Grade devices are capable of up to 25-

Mbps data rates with low power consumption and

integrated filters for noise-prone applications. CGrade

devices are recommended for lower-speed

applications where input noise pulses of less than 6

ns duration must be suppressed, or when low-power

consumption is critical.

Each isolation channel has a logic input and output

buffer separated by a silicon dioxide (SiO2) insulation

barrier. Used in conjunction 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 (M-Grade), 3.3-V and 5-V

supplies. All inputs are 5-V tolerant when supplied

from 3.3-V or 2.7-V supplies.