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ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC
SLLSEI6G – SEPTEMBER 2014 – REVISED JANUARY 2017
ISO734x Robust EMC, Low-Power, Quad-Channel Digital Isolators
1 Features
1 Signaling Rate: 25 Mbps
• Integrated Noise Filter on the Inputs
• Default Output High and Low Options
• Low Power Consumption, Typical ICC per Channel
at 1 Mbps:
– ISO7340x: 0.9 mA (5-V Supplies),
0.7 mA (3.3-V Supplies)
– ISO7341x: 1.2 mA (5-V Supplies),
0.9 mA (3.3-V Supplies)
– ISO7342x: 1.3 mA (5-V Supplies),
0.9 mA (3.3-V Supplies)
• Low Propagation Delay: 31 ns
Typical (5-V Supplies)
• 3.3-V and 5-V Level Translation
• Wide Temperature Range: –40°C to 125°C
• 70-KV/μs Transient Immunity,
Typical (5-V Supplies)
• Robust Electromagnetic Compatibility (EMC)
– System-level ESD, EFT, and Surge Immunity
– Low Emissions
• Operates from 3.3-V and 5-V Supplies
• Wide-Body SOIC-16 Package
• Safety-Related Certifications:
– 4242-VPK Basic Isolation per DIN V VDE V
0884-10 and DIN EN 61010-1
– 3-KVRMS Isolation for 1 minute per UL 1577
– CSA Component Acceptance Notice 5A, IEC
60950-1 and IEC 61010-1 End Equipment
Standards
– GB4943.1-2011 CQC Certified
2 Applications
• Optocoupler Replacement in:
– Industrial Fieldbus
– Profibus
– Modbus
– DeviceNet Data Buses
– Servo Control Interface
– Motor Control
– Power Supplies
– Battery Packs
3 Description
The ISO734x family of devices provides galvanic
isolation up to 3000 VRMS for 1 minute per UL 1577
and 4242 VPK per VDE V 0884-10. These devices
have four isolated channels comprised of logic input
and output buffers separated by a silicon dioxide
(SiO2) insulation barrier.
The ISO7340x device has four channels in forward
direction, the ISO7341x device has three forward and
one reverse-direction channels, and the ISO7342x
device has two forward and two reverse-direction
channels. In case of input power or signal loss, the
default output is low for devices with suffix F and high
for devices without suffix F. See the Device
Functional Modes section for further details.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE
ISO7340C
ISO7340FC
ISO7341C
ISO7341FC
SOIC (16)
10.30 mm × 7.50 mm
ISO7342C
ISO7342FC
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
VCCI
Isolation
Capacitor
VCCO
INx OUTx
ENx
GNDI
GNDO
VCCI and GNDI are supply and ground
connections respectively for the input
channels.
VCCO and GNDO are supply and ground
connections respectively for the output.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

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ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC
SLLSEI6G – SEPTEMBER 2014 – REVISED JANUARY 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 5
6 Pin Configuration and Functions ......................... 6
7 Specifications......................................................... 7
7.1 Absolute Maximum Ratings ...................................... 7
7.2 ESD Ratings.............................................................. 7
7.3 Recommended Operating Conditions....................... 7
7.4 Thermal Information .................................................. 8
7.5 Power Ratings........................................................... 8
7.6 Insulation Specifications............................................ 9
7.7 Safety-Related Certifications................................... 10
7.8 Safety Limiting Values ............................................ 10
7.9 Electrical Characteristics—5-V Supply ................... 11
7.10 Supply Current Characteristics—5-V Supply ........ 11
7.11 Electrical Characteristics—3.3-V Supply .............. 12
7.12 Supply Current Characteristics—3.3-V Supply ..... 12
7.13 Switching Characteristics—5-V Supply................. 13
7.14 Switching Characteristics—3.3-V Supply.............. 13
7.15 Insulation Characteristics Curves ......................... 14
7.16 Typical Characteristics .......................................... 15
8 Parameter Measurement Information ................ 17
9 Detailed Description ............................................ 19
9.1 Overview ................................................................. 19
9.2 Functional Block Diagram ....................................... 19
9.3 Feature Description................................................. 20
9.4 Device Functional Modes........................................ 21
10 Application and Implementation........................ 22
10.1 Application Information.......................................... 22
10.2 Typical Application ................................................ 22
11 Power Supply Recommendations ..................... 26
12 Layout................................................................... 27
12.1 Layout Guidelines ................................................. 27
12.2 Layout Example .................................................... 27
13 Device and Documentation Support ................. 28
13.1 Documentation Support ........................................ 28
13.2 Related Links ........................................................ 28
13.3 Receiving Notification of Documentation Updates 28
13.4 Community Resource............................................ 28
13.5 Trademarks ........................................................... 28
13.6 Electrostatic Discharge Caution ............................ 28
13.7 Glossary ................................................................ 28
14 Mechanical, Packaging, and Orderable
Information ........................................................... 29
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision F (August 2016) to Revision G
Page
• Deleted Reinforced from the data sheet title .......................................................................................................................... 1
• the production tested note for the UL VRMS value from the Safety-Related Certifications ................................................... 10
Changes from Revision E (April 2015) to Revision F
Page
• Changed the minimum air gap (clearance) parameter (L(I01)) to the external clearance parameter.................................... 9
• Changed the minimum external tracking (creepage) parameter (L(I02)) to the external creepage parameter...................... 9
• Changed the typ value for the enable propagation delay, high impedance-to-high output parameter of the FC
devices and the typ value for the enable propagation delay, high impedance-to-low output parameter of the C
devices from 16 to 16000 in the Switching Characteristics—3.3-V Supply table ................................................................ 13
• Added the Receiving Notification of Documentation Updates section ................................................................................ 28
Changes from Revision D (March 2015) to Revision E
Page
• Deleted "(VDE V0884-10):2006-12" and "(VDE 0411-1:2011-07)" from the Features Safety and Regulatory Approvals:.... 1
• Deleted "(Approval Pending)" From the CSA Component Acceptance list item in the Features........................................... 1
• Deleted IEC from the section title: Insulation and Safety-Related Specifications for DW-16 Package ................................ 9
• Changed the TEST Conditions of CTI in Insulation and Safety-Related Specifications for DW-16 Package........................ 9
• Changed the Test Conditions of VISO in Insulation Characteristics ....................................................................................... 9
• Changed column CSA in the Safety-Related Certifications table ....................................................................................... 10
• Changed From: VCC1 To: VCCI in Switching Characteristics Test Circuit and Voltage Waveforms ..................................... 17
• Changed From: VCC1 To: VCCI and From: VCC2 To: VCCO in Common-Mode Transient Immunity Test Circuit ..................... 18
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Product Folder Links: ISO7340C ISO7340FC ISO7341C ISO7341FC ISO7342C ISO7342FC

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ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC
SLLSEI6G – SEPTEMBER 2014 – REVISED JANUARY 2017
Changes from Revision C (December 2014) to Revision D
Page
• Changed the DIN V VDE 0884-10 number in the Features Safety and Regulatory Approvals: ............................................ 1
• Added "(Approval Pending)" to the CSA Component Acceptance list item in the Features .................................................. 1
• Deleted "All Agencies Approvals Planned" from the Features Safety and Regulatory Approvals: ........................................ 1
• Changed the Simplified Schematic: VCC1 To VCCI, VCC2 to VCCO and GND1 to GNDI, GND2 to GNDO. Added Notes
1 and 2.................................................................................................................................................................................... 1
• Added Note: "Maximum voltage must not exceed 6 V:" to Absolute Maximum Ratings........................................................ 7
• Added "DT1" to the Minimum internal gap in Insulation and Safety-Related Specifications for DW-16 Package ................. 9
• Changed VIORM "Maximum repetitive peak voltage" To: "Maximum repetitive peak isolation voltage per DIN V VDE V
0884-10" in Insulation Characteristics ................................................................................................................................... 9
• Changed VIOTM From: "DIN V VDE 0884-10 " To: "DIN V VDE V 0884-10" in Insulation Characteristics ............................ 9
• Changed VIOSM "Maximum surge voltage per DIN V VDE 0884-10 " To: "Maximum surge isolation voltage per DIN V
VDE V 0884-100" in Insulation Characteristics ..................................................................................................................... 9
• Changed VIOSM Test Conditions in Insulation Characteristics ............................................................................................... 9
• Changed VPR From: "DIN V VDE 0884-10 " To: "DIN V VDE V 0884-10" in Insulation Characteristics ............................... 9
• Changed RS Test Conditions in Insulation and Safety-Related Specifications for DW-16 Package From: TS To: TS =
150°C ..................................................................................................................................................................................... 9
• Changed the Safety-Related Certifications table ................................................................................................................ 10
• Changed title From: " IEC Safety Limiting Values" To: Safety Limiting Values ................................................................... 10
• Changed MIN value for VOH in the Electrical Characteristics From: VCCx - 0.5 To: VCCO - 0.5 ............................................ 11
• Changed VCCx To VCCO in Note 1 of the Electrical Characteristics....................................................................................... 11
• Changed MIN value for VOH in the Electrical Characteristics From: VCCx - 0.5 To: VCCO - 0.5 ............................................ 12
• Changed VCCx To VCCO in Note 1 of the Electrical Characteristics....................................................................................... 12
• Changed Function Table Header information From: INPUT-SIDE VCC To: VCCI and OUTPUT-SIDE VCC To: VCCO ......... 21
• Changed Device I/O Schematics From: VCC To: VCCI on the inputs and VCCO on Output and Enabled............................... 21
• Moved Typical ISO7340x Circuit Hook-up to Typical ISO7342x-Q1 Circuit Hook-up from the Design Requirements
section to the Detailed Design Procedure section................................................................................................................ 23
Changes from Revision B (November 2014) to Revision C
Page
• Changed the Handling Ratings table to ESD Ratings............................................................................................................ 7
• Changed Minimum internal gap MIN value in Insulation and Safety-Related Specifications for DW-16 Package
From: 0.014 mm To: 13.5 µm................................................................................................................................................. 9
• Changed Minimum internal gap MIN value in Insulation and Safety-Related Specifications for DW-16 Package
From: 13.5 µm To: 13 µm....................................................................................................................................................... 9
• Delete text "per DIN V VDE 0884-10" from VIORM in the table in section Insulation Characteristics ..................................... 9
• Changed From: VPEAK To VPK in the UNIT column of the table in section Insulation Characteristics .................................... 9
• Added VIOSM to the table in section Insulation Characteristics .............................................................................................. 9
• Changed the table in Safety-Related Certifications section - removed text "Certified according to", "Approved
under", "Recognized under", changed "pending" To: "planned" .......................................................................................... 10
• Changed Maximum Repetitive Peak Voltage, 1414 VPK To: Maximum surge voltage , 6000 VPK in the VDE column
of the table in section Safety-Related Certifications............................................................................................................. 10
• Changed the ICC2, Supply current, DC to 1 Mbps TYP value From: 3 To 3.2 mA .............................................................. 11
• Changed the ICC2, Supply current, 10 Mbps TYP value From: 5.1 To 5.6 mA .................................................................... 11
• Changed the ICC2, Supply current, 25 Mbps TYP value From: 8.6 To 9.3 mA .................................................................... 11
• Changed the ICC1, Supply current, 10 Mbps TYP value From: 0.8 To 0.9 mA .................................................................... 12
• Changed the ICC2, Supply current, 10 Mbps TYP value From: 0.3.6 To 3.9 mA ................................................................. 12
• Changed the ICC2, Supply current, 25 Mbps TYP value From: 5.9 To 6.3 mA .................................................................... 12
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ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC
SLLSEI6G – SEPTEMBER 2014 – REVISED JANUARY 2017
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• Added ISO7340 Supply Current vs Data Rate (15-pF Load) and ISO7340x Supply Current vs Data Rate (No Load)....... 15
• Changed ISO7341x Supply Current vs Data Rate (No Load).............................................................................................. 15
Changes from Revision A (Octoberr 2014) to Revision B
Page
• Added Test Condition to IEC 60664-1 Ratings Table: Rated mains voltage 1000 VRMS ................................................... 9
• Changed the RIO Test Conditions in Insulation and Safety-Related Specifications for DW-16 Package : Added TA =
25°C at MIN = 1012 ................................................................................................................................................................. 9
• Changed the RIO Test Conditions in Insulation and Safety-Related Specifications for DW-16 Package : Added VIO =
500 V, 100°C TA 125°C at MIN = 1011 ............................................................................................................................. 9
• Added ISO7341x Supply Current vs Data Rate (15-pF Load) and ISO7341x Supply Current vs Data Rate (No Load)..... 15
Changes from Original (September 2014) to Revision A
Page
• Changed From a 1 page Product Preview to the full datasheet ........................................................................................... 1
• Changed the Simplified Schematic, added ground symbols .................................................................................................. 1
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ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC
SLLSEI6G – SEPTEMBER 2014 – REVISED JANUARY 2017
5 Description (continued)
Used in conjunction with isolated power supplies, these devices help prevent noise currents on a data bus or
other circuits from entering the local ground and interfering with or damaging sensitive circuitry. The ISO734x
device has integrated noise filter for harsh industrial environment where short noise pulses may be present at the
device input pins. The ISO734x device has TTL input thresholds and operates from 3-V to 5.5-V supply levels.
Through innovative chip design and layout techniques, electromagnetic compatibility of the ISO734x family of
devices has been significantly enhanced to enable system-level ESD, EFT, surge, and emissions compliance.
Copyright © 2014–2017, Texas Instruments Incorporated
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5