1
FN6060.2
ISL4486, ISL81486
5V, Ultra High Speed, PROFIBUS,
RS-485/RS-422 Transceivers
The Intersil ISL4486 and ISL81486 are BiCMOS, 5V
powered, single transceivers that meet both the RS-485 and
RS-422 standards for balanced communication, and feature
the larger output voltage and higher data rate - up to
40Mbps - required by high speed PROFIBUS applications.
Unlike
competitive products, these Intersil devices are
specified for 10% tolerance supplies (4.5V to 5.5V) and
deliver at least a 2.3V differential output voltage over this
supply range. At the 5% tolerance specified by many
competitors, the ISL4486 delivers an unsurpassed 2.5V
differential signal into a 54
total load. This translates into
longer reach, or better data integrity, at the exceptional
40Mbps data rate.
SCSI applications benefit from the ISL4486’s low receiver
and transmitter part-to-part skews, which make it perfect for
high speed parallel applications where large numbers of bits
must be simultaneously captured. The low bit-to-bit skew
eases the timing constraints on the data latching signal.
These devices present a “0.6 unit load” to the RS-485 bus,
which allows up to 50 transceivers on the network.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high Rx output if Rx inputs are floating.
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
Specified for 10% Tolerance Supplies
High Data Rates
ISL4486 . . . . . . . . . . . . . . . . . . . . . . . . . . up to 40Mbps
ISL81486 . . . . . . . . . . . . . . . . . . . . . . . . . up to 30Mbps
Large Differential Output Voltage . . . . . . . . . . 3V into 54
Low Bit-to-Bit (Part-to-Part) Skew for Parallel Applications
0.6 Unit Load Allows up to 50 Devices on the Bus
ISL81486 is a Drop-In Replacement for the ADM1486
Low Quiescent Current . . . . . . . . . . . . . . . . . . . . . 800A
-7V to +12V Common Mode Input Voltage Range
Three-State Rx and Tx Outputs
14ns (Max) Propagation Delays, 2ns (Max) Skew
Operates from a Single +5V Supply (10% Tolerance)
Current Limiting and Thermal Shutdown for driver
Overload Protection
Pb-free available
Applications
SCSI “Fast 40” Drivers and Receivers
PROFIBUS DP and FMS Networks
Factory Automation
Field Bus Networks
Security Networks
Building Environmental Control Systems
Industrial/Process Control Networks
Ordering Information
PART NO. (BRAND)
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL4486IB (4486IB)
-40 to 85
8 Ld SOIC
M8.15
ISL4486IBZ (4486IB)
(See Note)
-40 to 85
8 Ld SOIC
(Pb-free)
M8.15
ISL4486IU (4486)
-40 to 85
8 Ld MSOP
M8.118
ISL4486IUZ (4486)
(See Note)
-40 to 85
8 Ld MSOP
(Pb-free)
M8.118
ISL81486IB (81486IB)
-40 to 85
8 Ld SOIC
M8.15
ISL81486IBZ
(81486IB) (See Note)
-40 to 85
8 Ld SOIC
(Pb-free)
M8.15
ISL81486IU (1486)
-40 to 85
8 Ld MSOP
M8.118
ISL81486IUZ (1486)
(See Note)
-40 to 85
8 Ld MSOP
(Pb-free)
M8.118
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination finish, which
is 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-020B.
Pinout
ISL4486, ISL81486 (SOIC, MSOP)
TOP VIEW
RO
RE
DE
DI
1
2
3
4
8
7
6
5
VCC
B/Z
A/Y
GND
D
R
Data Sheet
August 2004
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. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.