SN65HVD1781

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70-V Fault-Protected RS-485 Transceivers

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Data sheet

document-pdfAcrobat SN65HVD178x Fault-Protected RS-485 Transceivers With 3.3-V to 5-V Operation datasheet (Rev. H) PDF | HTML

SN65HVD1781

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Data sheet

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Product details

Number of receivers

1

Number of transmitters

1

Duplex

Half

Signaling rate (max) (Mbps)

1

Fault protection (V)

-70 to 70

Common-mode range (V)

-7 to 12

Number of nodes

320

Features

Fault protection

Isolated

No

Supply current (max) (µA)

6000

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Number of receivers

1

Number of transmitters

1

Duplex

Half

Signaling rate (max) (Mbps)

1

Fault protection (V)

-70 to 70

Common-mode range (V)

-7 to 12

Number of nodes

320

Features

Fault protection

Isolated

No

Supply current (max) (µA)

6000

Rating

Catalog

Operating temperature range (°C)

-40 to 125

SOIC (D)

8

29.4 mm² (4.9 mm × 6 mm)

PDIP (P)

8

92.5083 mm² (9.81 mm × 9.43 mm)

Bus-Pin Fault Protection to:
- > ±70 V (SN65HVD1780, SN65HVD1781)
- > ±30 V (SN65HVD1782)
Operation With 3.3-V to 5-V Supply Range
±16-kV HBM Protection on Bus Pins
Reduced Unit Load for Up to 320 Nodes
Failsafe Receiver for Open-Circuit, Short-Circuit, and Idle-Bus Conditions
Low Power Consumption
- Low Standby Supply Current, 1 µA Maximum
- I_CC 4-mA Quiescent Current During Operation
Pin-Compatible With Industry-Standard SN75176
Signaling Rates of 115 kbps, 1 Mbps, and up to 10 Mbps
Create a Custom Design using the SN65HVD178x with the WEBENCH® Power Designer

Bus-Pin Fault Protection to:
- > ±70 V (SN65HVD1780, SN65HVD1781)
- > ±30 V (SN65HVD1782)
Operation With 3.3-V to 5-V Supply Range
±16-kV HBM Protection on Bus Pins
Reduced Unit Load for Up to 320 Nodes
Failsafe Receiver for Open-Circuit, Short-Circuit, and Idle-Bus Conditions
Low Power Consumption
- Low Standby Supply Current, 1 µA Maximum
- I_CC 4-mA Quiescent Current During Operation
Pin-Compatible With Industry-Standard SN75176
Signaling Rates of 115 kbps, 1 Mbps, and up to 10 Mbps
Create a Custom Design using the SN65HVD178x with the WEBENCH® Power Designer

The SN65HVD178x devices are designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. The devices are also robust to ESD events with high levels of protection to the human-body-model specification.

The SN65HVD178x devices combine a differential driver and a differential receiver, which operate from a single power supply. In the SN65HVD1782, the driver differential outputs and the receiver differential inputs are connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. This port features a wide common-mode voltage range, making the devices suitable for multipoint applications over long cable runs. These devices are characterized from –40°C to 125°C. These devices are pin-compatible with the industry-standard SN75176 transceiver, making them drop-in upgrades in most systems.

These devices are fully compliant with ANSI TIA/EIA 485-A with a 5-V supply and can operate with a 3.3-V supply with reduced driver output voltage for low-power applications. For applications where operation is required over an extended common-mode voltage range, see the SN65HVD1785 (SLLS872) data sheet.

The SN65HVD178x devices are designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. The devices are also robust to ESD events with high levels of protection to the human-body-model specification.

The SN65HVD178x devices combine a differential driver and a differential receiver, which operate from a single power supply. In the SN65HVD1782, the driver differential outputs and the receiver differential inputs are connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. This port features a wide common-mode voltage range, making the devices suitable for multipoint applications over long cable runs. These devices are characterized from –40°C to 125°C. These devices are pin-compatible with the industry-standard SN75176 transceiver, making them drop-in upgrades in most systems.

These devices are fully compliant with ANSI TIA/EIA 485-A with a 5-V supply and can operate with a 3.3-V supply with reduced driver output voltage for low-power applications. For applications where operation is required over an extended common-mode voltage range, see the SN65HVD1785 (SLLS872) data sheet.

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Technical documentation

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Top documentation	Type	Title	Format options	Date
*	Data sheet	SN65HVD178x Fault-Protected RS-485 Transceivers With 3.3-V to 5-V Operation datasheet (Rev. H)	PDF \| HTML	Mar 10, 2017
	Functional safety information	SN65HVD178x Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA	PDF \| HTML	Mar 1, 2021

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Evaluation board

RS485-HF-DPLX-EVM — RS-485 half-duplex evaluation module

The RS-485 half-duplex evaluation module (EVM) helps designers evaluate device performance, supporting fast development and analysis of data-transmission systems using any of the SN65HVD1x, SN65HVD2x, SN65HVD7x, SN65HVD8x and SN65HVD96 half-duplex transceivers. The EVM board comes without the (...)

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