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.