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SN65HVD379 Datasheet PDF

Part Number SN65HVD379
Description 3.3 V FULL-DUPLEX RS-485/RS-422 DRIVERS AND BALANCED RECEIVERS
Manufacture etcTI
Total Page 17 Pages
PDF Download Download SN65HVD379 Datasheet PDF

Features: Datasheet pdf SN65HVD379 www.ti.com ................. ....................................... ....................................... ....................................... .............. SLLS667B – FEBRUARY 20 06 – REVISED JUNE 2008 3.3 V FULL-DUP LEX RS-485/RS-422 DRIVERS AND BALANCED RECEIVERS FEATURES 1 • Designed for INTERBUS Applications • Designed for RS-422 and RS-485 Networks • Balanced Receiver Thresholds • 1/2 Unit-Load (up to 64 nodes on the bus) • Bus-Pin ESD Protection 15 kV HBM • Bus-Fault Protection of –7 V to 12 V • Therm al Shutdown Protection • Power-Up/Dow n Glitch-free Bus Inputs and Outputs High Input Impedance With Low VCC • Monotonic Outputs During Power Cycling • 5-V Tolerant Inputs APPLICATIONS Digital Motor Control • Utility Me ters • Chassis-to-Chassis Interconnec tions • Electronic Security Stations • Industrial, Process, and Building A utomation • Point-of-Sale (POS) Termi nals and Networks • DTE/DCE Interfaces DESCRIPTION The SN65HVD379 is a differential line driver and di.

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SN65HVD379 datasheet
SN65HVD379
www.ti.com .................................................................................................................................................... SLLS667B – FEBRUARY 2006 – REVISED JUNE 2008
3.3 V FULL-DUPLEX RS-485/RS-422 DRIVERS AND BALANCED RECEIVERS
FEATURES
1
Designed for INTERBUS Applications
Designed for RS-422 and RS-485 Networks
Balanced Receiver Thresholds
1/2 Unit-Load (up to 64 nodes on the bus)
Bus-Pin ESD Protection 15 kV HBM
Bus-Fault Protection of –7 V to 12 V
Thermal Shutdown Protection
Power-Up/Down Glitch-free Bus Inputs and
Outputs
High Input Impedance With Low VCC
Monotonic Outputs During Power Cycling
5-V Tolerant Inputs
APPLICATIONS
Digital Motor Control
Utility Meters
Chassis-to-Chassis Interconnections
Electronic Security Stations
Industrial, Process, and Building Automation
Point-of-Sale (POS) Terminals and Networks
DTE/DCE Interfaces
DESCRIPTION
The SN65HVD379 is a differential line driver and
differential-input line receiver that operates with a
3.3-V power supply. Each driver and receiver has
separate input and output pins for full-duplex bus
communication designs. They are designed for
balanced transmission lines and interoperation with
ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11, and
ISO 8482:1993 standard-compliant devices.
These differential bus drivers and receivers are
monolithic, integrated circuits designed for full-duplex
bi-directional data communication on multipoint
bus-transmission lines at signaling rates(1) up to 25
Mbps. The SN65HVD379 is fully enabled with no
external enabling pins.
The 1/2 unit load receiver has a higher receiver input
resistance. This results in lower bus leakage currents
over the common-mode voltage range, and reduces
the total amount of current that an RS-485 driver is
forced to source or sink when transmitting.
The balanced differential receiver input threshold
makes the SN65HVD379 more compatible with
fieldbus requirements that define an external failsafe
structure.
(1) The signaling rate of a line is the number of voltage
transitions that are made per second expressed in the units
bps (bits per second).
BALANCED RECEIVER INPUT THRESHOLDS
Receiver Output High
Receiver Output Low
VID
SN65HVD379
D PACKAGE
(TOP VIEW)
VCC
R
D
GND
1
2
3
4
8A
7B
6Z
5Y
2
R
3
D
8
A
7
B
5
Y
6
Z
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2008, Texas Instruments Incorporated

SN65HVD379 datasheet
SN65HVD379
SLLS667B – FEBRUARY 2006 – REVISED JUNE 2008 .................................................................................................................................................... www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
SIGNALING RATE
25 Mbps
ORDERING INFORMATION
UNIT LOADS
PART NUMBER(1)
1/2 SN65HVD379
SOIC MARKING
(1) These are The D package is available taped and reeled. Add an R suffix to the part number (ie. SN65HVD379DR).
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1) (2)
VCC
VA, VB, VY, VZ
VTRANS
VI
PCONT
IO
Supply voltage range
Voltage range at any bus terminal (A, B, Y, Z)
Voltage input, transient pulse through 100 . See Figure 8 (A, B, Y, Z)(3)
Input voltage range (D, DE, RE)
Continuous total power dissipation
Output current (receiver output only, R)
UNIT
–0.3 V to 6 V
–9 V to 14 V
–50 to 50 V
-0.5 V to 7 V
Internally limited(4)
11 mA
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values, except differential I/O bus voltages, are with respect to network ground terminal.
(3) This tests survivability only and the output state of the receiver is not specified.
(4) The Thermal shutdown protection circuit internally limits the continuous total power dissipation. Thermal shutdown typically occurs when
the junction temperature reaches 165C.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range unless otherwise noted
PARAMETER
VCC
VI or VIC
1/tUI
RL
VIH
VIL
VID
IOH
Supply voltage
Voltage at any bus terminal (separately or common mode)
Signaling rate
SN65HVD379
Differential load resistance
High-level input voltage
D
Low-level input voltage
D
Differential input voltage
High-level output current
Driver
Receiver
Driver
IOL
Low-level output current
Receiver
TA Ambient still-air temperature
MIN
3
–7 (1)
54
2
0
–12
–60
–8
–40
NOM
60
MAX
3.6
12
25
VCC
0.8
12
UNIT
V
Mbps
V
mA
60
mA
8
85 C
(1) The algebraic convention, in which the least positive (most negative) limit is designated as minimum is used in this data sheet.
2 Submit Documentation Feedback
Copyright © 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): SN65HVD379




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