ISO1412DW

The ISO14xx devices are galvanically-isolated differential line transceivers for TIA/EIA RS-485 and RS-422 applications. These noise-immune transceivers are designed to operate in harsh industrial environments. The bus pins of these devices can endure high levels of IEC electrostatic discharge (ESD) and IEC electrical fast transient (EFT) events which eliminates the need for additional components on bus for system-level protection. The devices are available for both basic and reinforced isolation (see Reinforced and Basic Isolation Options).

These devices are used for long distance communications. Isolation breaks the ground loop between the communicating nodes, allowing for a much larger common mode voltage range. The symmetrical isolation barrier of each device is tested to provide 5000 V_RMS of isolation for 1 minute per UL 1577 between the bus-line transceiver and the logic-level interface.

The ISO14xx devices can operate from 1.71 V to 5.5 V on side 1 which lets the devices be interfaced with low voltage FPGAs and ASICs. The wide supply voltage on side 2 from 3 V to 5.5 V eliminates the need for a regulated supply voltage on the isolated side. These devices support a wide operating ambient temperature range from –40°C to +125°C.

Key Features

• Compatible with TIA/EIA-485-A
• PROFIBUS compatible at 5-V bus-side supply
• Bus I/O protection
  • ± 30 kV HBM
  • ±16 kV IEC 61000-4-2 Contact discharge
  • ± 4 kV IEC 61000-4-4 Electrical fast transient
• Low-EMI 500-kbps, 12 Mbps and 50 Mbps Data Rates
• 1.71-V to 5.5-V logic-side supply (V_CC1), 3-V to 5.5-V bus-side supply (V_CC2)
• Failsafe receiver for bus open, short, and idle
• 1/8 Unit load up to 256 nodes on bus
• 100-kV/µs (typical) high common-mode transient immunity
• Extended temperature range from –40°C to +125°C
• Glitch-free power-up and power-down for hot plug-in
• Wide-body SOIC-16 package
• Pin compatible to most isolated RS-485 transceivers
• Safety-related certifications:
  • 7071-V_PK V_IOTM and 1500-V_PK V_IORM (reinforced and basic options) per DIN VDE V 0884-11:2017-01
  • 5000-V_RMS isolation for 1 minute per UL 1577
  • IEC 60950-1, IEC 62368-1, IEC 60601-1 and IEC 61010-1 certifications
  • CQC, TUV, and CSA approvals