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ISO35
  • ISO35
  • ISO35
  • ISO35

ISO35

ACTIVE

1-Mbps, full-duplex, 2.5-kVrms isolated RS-485 & RS-422 transceiver

Texas Instruments ISO35 Product Info

1 April 2026 0

Parameters

Rating

Catalog

Integrated isolated power

No

Isolation rating

Basic

Duplex

Full

Data rate (max) (Mbps)

1

Working isolation voltage (VIOWM) (Vrms)

400

Surge isolation voltage (VIOSM) (VPK)

4000

Transient isolation voltage (VIOTM) (VPK)

4000

Withstand isolation voltage (VISO) (Vrms)

2500

ESD HBM (kV)

16

VCC1 (min) (V)

3.15

VCC1 (max) (V)

3.6

VCC2 (min) (V)

3.15

VCC2 (max) (V)

3.6

Fail safe

Idle, Open, Short

CMTI (min) (kV/µs)

25

Operating temperature range (°C)

-55 to 125

Creepage (min) (mm)

8.34

Clearance (min) (mm)

8.34

Package

SOIC (DW)-16-106.09 mm² 10.3 x 10.3

Features

  • Meets or exceeds TIA/EIA RS-485 requirements
  • 1/8 unit load – Up to 256 nodes on a bus
  • Signaling rates up to 1 Mbps
  • Thermal shutdown protection
  • Low bus capacitance – 16 pF (typical)
  • 50 kV/µs typical transient immunity
  • Fail-safe receiver for bus open, short, idle
  • 3.3-V inputs are 5-V tolerant
  • Safety and regulatory approvals
    • 4000-V PK V IOTM, 560-V PK V IORM per DIN EN IEC 60747-17 (VDE 0884-17)
    • 2500 V RMS isolation rating per UL 1577
    • 2500 V RMS isolation rating per CSA 62368-1.
  • Meets or exceeds TIA/EIA RS-485 requirements
  • 1/8 unit load – Up to 256 nodes on a bus
  • Signaling rates up to 1 Mbps
  • Thermal shutdown protection
  • Low bus capacitance – 16 pF (typical)
  • 50 kV/µs typical transient immunity
  • Fail-safe receiver for bus open, short, idle
  • 3.3-V inputs are 5-V tolerant
  • Safety and regulatory approvals
    • 4000-V PK V IOTM, 560-V PK V IORM per DIN EN IEC 60747-17 (VDE 0884-17)
    • 2500 V RMS isolation rating per UL 1577
    • 2500 V RMS isolation rating per CSA 62368-1.

Description

The ISO15 is an isolated half-duplex differential line transceiver while the ISO35 is an isolated full-duplex differential line driver and receiver for TIA/EIA 485/422 applications. The ISO15M and ISO35M have extended ambient temperature ratings of –55°C to 125°C while the ISO15 and ISO35 are specified over –40°C to 85°C.

These devices are ideal for long transmission lines because the ground loop is broken to allow for a much larger common-mode voltage range. The symmetrical barrier of the device is tested to provide isolatlion of 4000 V PK per VDE and 2500 V RMS per UL and CSA between the bus-line transceiver and the logic-level interface.

Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver and/or nearby sensitive circuitry if they are of sufficient magnitude and duration. These isolated devices can significantly increase protection and reduce the risk of damage to expensive control circuits.

The ISO15 is an isolated half-duplex differential line transceiver while the ISO35 is an isolated full-duplex differential line driver and receiver for TIA/EIA 485/422 applications. The ISO15M and ISO35M have extended ambient temperature ratings of –55°C to 125°C while the ISO15 and ISO35 are specified over –40°C to 85°C.

These devices are ideal for long transmission lines because the ground loop is broken to allow for a much larger common-mode voltage range. The symmetrical barrier of the device is tested to provide isolatlion of 4000 V PK per VDE and 2500 V RMS per UL and CSA between the bus-line transceiver and the logic-level interface.

Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver and/or nearby sensitive circuitry if they are of sufficient magnitude and duration. These isolated devices can significantly increase protection and reduce the risk of damage to expensive control circuits.

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