LT1791ACSPBF Linear Technology Corporation, LT1791ACSPBF Datasheet

LT1791ACSPBF

Manufacturer Part Number

LT1791ACSPBF

Description

SOP14

Manufacturer

Linear Technology Corporation

Datasheet

1.LT1785AIS8PBF.pdf (16 pages)

Specifications of LT1791ACSPBF

Date_code

07+

Current page: 1 of 16
Download datasheet (204Kb)

APPLICATIONS

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

FEATURES

Protected from Overvoltage Line Faults to ±60V

Pin Compatible with LTC485 and LTC491

High Input Impedance Supports Up to 128 Nodes

No Damage or Latchup to ESD

Controlled Slew Rates for EMI Emissions Control

Guaranteed High Receiver Output State for Floating,

Shorted or Inactive Inputs

Outputs Assume a High Impedance When Off or

Powered Down

Drives Low Cost, Low Impedance Cables

Short-Circuit Protection on All Outputs

Thermal Shutdown Protection

Guaranteed Operation to 125°C

Industrial Control Data Networks

CAN Bus Applications

HVAC Controls

IEC-1000-4-2 Level 4: ±15kV Air Discharge

IEC-1000-4-2 Level 2: ±4kV Contact Discharge

RO1

RO2

RE1

DE1

RE2

DE2

DI1

DI2

LT1785

GND1

GND2

CC1

CC2

TERM

178591 TA01

DESCRIPTION

The LT

ential bus transceivers for RS485 and RS422 applications

which feature on-chip protection from overvoltage faults

on the data transmission lines. Receiver input and driver

output pins can withstand voltage faults up to ±60V with

respect to ground with no damage to the device. Faults

may occur while the transceiver is active, shut down or

powered off.

Data rates to 250kbaud on networks of up to 128 nodes

are supported. Controlled slew rates on the driver out-

putscontrol EMI emissions and improve data transmis-

sion integrity on improperly terminated lines. Drivers are

speciﬁ ed to operate with inexpensive cables as low as

72Ω characteristic impedance.

The LT1785A/LT1791A devices have “fail-safe” receiver

inputs to guarantee a receiver output high for shorted, open

or inactive data lines. On-chip ESD protection eliminates

need for external protection devices.

The LT1785/LT1785A are available in 8-lead DIP and SO

packages and the LT1791/LT1791A in 14-lead DIP and

SO packages.

RS485/RS422 Transceivers

1785/LT1791 are half-duplex and full-duplex differ-

Y-Z

Normal Operation Waveforms at 250kBaud

60V Fault Protected

LT1785/LT1785A/

LT1791/LT1791A

178591 TA02

178491fb

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