ISL43485_05 Datasheet, PDF (1/11 Pages) Intersil Corporation – 3.3V, Low Power, 30Mbps, RS-485/RS-422 Transceiver

®
Data Sheet
March 15, 2005
ISL43485
FN6071.1
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.
Pinout
ISL43485 (SOIC)
TOP VIEW
RO 1
R
RE 2
DE 3
DI 4
D
8 V_CC
7 B/Z
6 A/Y
5 GND
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
Ordering Information
PART NO.
(BRAND)
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL43485IB
(43485IB)
-40 to 85 8 Ld SOIC
M8.15
ISL43485IBZ
-40 to 85 8 Ld SOIC (Pb-free)
(43485IB) (Note)
M8.15
ISL43485IB-T
(43485IB)
-40 to 85 8 Ld SOIC
Tape and Reel
M8.15
ISL43485IBZ-T -40 to 85 8 Ld SOIC
M8.15
(43485IB) (Note)
Tape and Reel (Pb-free)
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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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