1 Features
1• Signaling Rate: 150 Mbps
• Low Power Consumption, Typical I CC per Channel
(3.3-V Supplies):
– ISO7640FM: 2 mA at 25 Mbps
– ISO7641FM: 2.4 mA at 25 Mbps quad•
Low Propagation Delay: 7-ns Typical
• 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, 3.3-V, and 5-V Supply and
Logic Levels
• Wide Body SOIC-16 Package
• Safety and Regulatory Approvals
– 6000 V PK / 4243 VRMS for 1 Minute per UL
1577
– VDE 6000 VPK Transient Overvoltage, 1414
VPK Working Voltage per DIN V VDE V 0884-
10 (VDE V 0884-10):2006-12
– CSA Component Acceptance Notice 5A, IEC
60950-1, IEC 61010-1, and IEC 60601-1 End
Equipment Standards
– TUV 5 KV RMS Reinforced Insulation per
EN/UL/CSA 60950-1 and EN/UL/CSA 61010-1
– CQC Reinforced Insulation per GB4943.1-
2011

2 Applications
• Optocoupler Replacement in:
– Industrial Fieldbus
– Profibus
– Modbus
– DeviceNet™ Data Buses
– Servo Control Interface
– Motor Control
– Power Supplies
– Battery Packs

3 Description
ISO7640FM and ISO7641FM provide galvanic
isolation up to 6 KVPK for 1 minute per UL and VDE.
These devices are also certified up to 5-KVRMS
Reinforced isolation at a working voltage of 400 VRMS
per end equipment standards EN/UL/CSA 60950-1
and 61010-1. ISO7640F and ISO7641F are quad•
channel isolators; ISO7640F has four forward and ISO7641F has three forward and one reverse-
direction channels. Suffix F indicates that output
defaults to Low-state in fail-safe conditions (see
Table 4). M-Grade devices are high-speed isolators capable of 150-Mbps data rate with fast propagation
delays.
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, 3.3-V, and 5-V supplies. All
inputs are 5-V tolerant when supplied from 3.3-V or
2.7-V supplies.