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FN6071.1
ISL43485
3.3V, Low Power, 30Mbps, RS-485/RS-422
Transceiver
The Intersil ISL43485 is a high speed BiCMOS 3.3V
powered, single transceiver that meets both the RS-485 and
RS-422 standards for balanced communication. Unlike
some competitive devices, this Intersil transceiver is
specified for 10% tolerance supplies (3V to 3.6V).
Data rates up to 30Mbps are achievable by using this
transceiver, which features higher slew rates.
Logic inputs (e.g., DI and DE) accept signals in excess of
5.5V, making them compatible with 5V logic families.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high output if Rx inputs are floating,
and the ISL43485 presents a “single unit load” to the RS-485
bus, which allows up to 32 transceivers on the network.
Driver (Tx) outputs are short circuit protected, even for
voltages exceeding the power supply voltage. Additionally,
on-chip thermal shutdown circuitry disables the Tx outputs to
prevent damage if power dissipation becomes excessive.
Features
High Data Rate. . . . . . . . . . . . . . . . . . . . . . up to 30Mbps
Operates from a Single +3.3V Supply (10% Tolerance)
Interoperable with 5V Logic
Single Unit Load Allows up to 32 Devices on the Bus
Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . 15nA
-7V to +12V Common Mode Input Voltage Range
Three State Rx and Tx Outputs
10ns Propagation Delay, 1ns Skew
Half Duplex Pinout
Current Limiting and Thermal Shutdown for driver
Overload Protection
Pb-Free Available (RoHS Compliant)
Applications
SCSI “Fast 20” Drivers and Receivers
Factory Automation
Data Loggers
Security Networks
Building Environmental Control Systems
Industrial/Process Control Networks
Level Translators
Pinout
ISL43485 (SOIC)
TOP VIEW
RO
RE
DE
DI
1
2
3
4
8
7
6
5
VCC
B/Z
A/Y
GND
D
R
Ordering Information
PART NO.
(BRAND)
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL43485IB
(43485IB)
-40 to 85
8 Ld SOIC
M8.15
ISL43485IBZ
(43485IB) (Note)
-40 to 85
8 Ld SOIC (Pb-free)
M8.15
ISL43485IB-T
(43485IB)
-40 to 85
8 Ld SOIC
Tape and Reel
M8.15
ISL43485IBZ-T
(43485IB) (Note)
-40 to 85
8 Ld SOIC
Tape and Reel (Pb-free)
M8.15
NOTE: Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with
both SnPb and Pb-free soldering operations. Intersil Pb-free products
are MSL classified at Pb-free peak reflow temperatures that meet or
exceed the Pb-free requirements of IPC/JEDEC J STD-020.
Data Sheet
March 15, 2005
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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