DataSheetWiki


MAX14945 fiches techniques PDF

Maxim Integrated - 2.75kVRMS Isolated 500kbps Half-Duplex RS-485/RS-422 Transceiver

Numéro de référence MAX14945
Description 2.75kVRMS Isolated 500kbps Half-Duplex RS-485/RS-422 Transceiver
Fabricant Maxim Integrated 
Logo Maxim Integrated 





1 Page

No Preview Available !





MAX14945 fiche technique
MAX14945
EVALUATION KIT AVAILABLE
2.75kVRMS Isolated 500kbps Half-Duplex RS-485/
RS-422 Transceiver with ±30kV ESD Protection
General Description
The MAX14945 isolated RS-485/RS-422 transceiver provides
2750VRMS (60s) of galvanic isolation between the cable
side (RS-485/RS-422 driver/receiver side) and the UART
side of the device. Isolation improves communication by
breaking ground loops and reduces noise when there
are large differences in ground potential between ports.
Signals are passed across the isolation barrier through
integrated high-voltage capacitors. This device allows for
robust communication at any speed up to 500kbps.
The device includes one half-duplex drive/receive channel.
The receiver is 1/8-unit load, allowing up to 256 transceivers
on a common bus.
Integrated true fail-safe circuitry ensures a logic-high on the
receiver output when inputs are shorted or open. Undervoltage
lockout disables the driver when the cable side or UART side
power supplies are below functional levels.
The driver outputs/receiver inputs are protected from
±30kV electrostatic discharge (ESD) to GNDB on the
cable side, as specified by the Human Body Model (HBM).
The MAX14945 is available in a wide body 16-pin
SO package and operates over the -40°C to +85°C
temperature range.
Benefits and Features
● High-Performance Transceiver Enables Flexible Designs
• Integrated LDO for Cable-Side Power
• Compliant with RS-485 EIA/TIA-485 Standard
• 500kbps Maximum Data Rate
• Allows Up to 256 Devices on the Bus
● Integrated Protection Ensures Robust Communication
• ±30kV ESD (HBM) on Driver Outputs/Receiver Inputs
• 2.75kVRMS Withstand-Isolation Voltage for 60s (VISO)
• 630VPEAK Maximum Repetitive Peak-Isolation
Voltage (VIORM)
• 445VRMS Maximum Working-Isolation Voltage (VIOWM)
• > 30 Years Lifetime at Rated Working Voltage
• Withstands ±10kV Surge per IEC 61000-4-5
• Thermal Shutdown
Safety Regulatory Approvals Pending
● UL According to UL1577
● cUL According to CSA Bulletin 5A
● VDE 0884-10
Applications
● Industrial Automation Equipment
● Programmable Logic Controllers
● HVAC
● Power Meters
Functional Diagram
VDDA
VLDO
Ordering Information/Selector Guide appears at end of data
sheet.
MAX14945
LDO VDDB
SBA
RE
RXD A
TXD B
DE
GNDA
GNDB
19-7967; Rev 0; 11/15

PagesPages 21
Télécharger [ MAX14945 ]


Fiche technique recommandé

No Description détaillée Fabricant
MAX1494 Single-Chip ADCs Maxim Integrated
Maxim Integrated
MAX14945 2.75kVRMS Isolated 500kbps Half-Duplex RS-485/RS-422 Transceiver Maxim Integrated
Maxim Integrated

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche