SN75HVD08, SN65HVD08
www.ti.com
SLLS550A–NOVEMBER 2002–REVISED MAY 2003
WIDE SUPPLY RANGE RS-485 TRANSCEIVER
The wide supply voltage range and low quiescent
current requirements allow the SN65HVD08s to
operate from a 5-V power bus in the cable with as
much as a 2-V line voltage drop. Busing power in the
cable can alleviate the need for isolated power to be
generated at each connection of a ground-isolated
bus.
FEATURES
•
Operates With a 3-V to 5.5-V Supply
•
Consumes Less Than 90 mW Quiescent
Power
•
Open-Circuit, Short Circuit, and Idle-Bus
Failsafe Receiver
•
•
•
1/8th Unit-Load (up to 256 nodes on the bus)
The driver differential outputs and receiver differential
inputs connect internally to form a differential in-
put/output (I/O) bus port that is designed to offer
minimum loading to the bus whenever the driver is
disabled or not powered. The drivers and receivers
have active-high and active-low enables respectively,
which can be externally connected together to func-
tion as a direction control.
Bus-Pin ESD Protection Exceeds 16 kV HBM
Driver Output Voltage Slew-Rate Limited for
Optimum Signal Quality at 10 Mbps
•
Electrically Compatible With ANSI TIA/EIA-485
Standard
APPLICATIONS
D or P PACKAGE
(TOP VIEW)
•
Data Transmission With Remote Stations
Powered From the Host
R
RE
DE
D
V
B
A
1
2
3
4
8
7
6
5
CC
•
•
•
•
Isolated Multipoint Data Buses
Industrial Process Control Networks
Point-of-Sale Networks
GND
Electric Utility Metering
LOGIC DIAGRAM (Positive Logic)
DESCRIPTION
The SN65HVD08 combines a 3-state differential line
driver and differential line receiver designed for bal-
anced data transmission and interoperation with ANSI
TIA/EIA-485-A and ISO-8482E standard-compliant
devices.
A
B
D
DE
RE
R
Remote
(One of n Shown)
Host
5 V Power
Isolation
Barrier
Direct
Connection
to Host
SN65HVD08
5 V Return
Power Bus and Return Resistance
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.
Copyright © 2002–2003, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.