ISO15 Texas instruments

ISO15

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ISO15

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Описание

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 VPK per VDE and 2500 VRMS 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.

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 V VDE
  V 0884-10 (VDE V 0884-10):2006-12 and DIN EN 61010-1
- 2500 V_RMS Isolation Rating per UL 1577
- 2500 V_RMS Isolation Rating per CSA CA5A and IEC 60950-1
APPLICATIONS
- Security Systems
- Chemical Production
- Factory Automation
- Motor and Motion Control
- HVAC and Building Automation Networks
- Networked Security Stations

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Number of receivers	1
Number of transmitters	1
Duplex	Half
Supply voltage (nom) (V)	3.3
Signaling rate (max) (MBits)	1
Fault protection (V)	-9 to 14
Common-mode range (V)	-7 to 12
Number of nodes	256
Isolated	Yes
Supply current (max) (µA)	21000
Rating	Catalog
Operating temperature range (°C)	-40 to 85, -55 to 125