ISL3159E Datasheet, PDF (1/16 Pages) Intersil Corporation – ±15kV ESD Protected, +125°C, 40Mbps, 5V, PROFIBUS®, Full Fail-safe, RS-485/RS-422 Transceivers

®
Data Sheet
July 26, 2007
ISL3159E
FN6364.0
±15kV ESD Protected, +125°C, 40Mbps,
5V, PROFIBUS^®, Full Fail-safe,
RS-485/RS-422 Transceivers
Intersil’s ISL3159E is a ±15kV IEC61000 ESD Protected, 5V
powered, single transceiver that meets both the RS-485 and
RS-422 standards for balanced communication. It also
features the larger output voltage and higher data rate - up to
40Mbps - required by high speed PROFIBUS applications,
and is offered in Industrial and Extended Industrial (-40°C to
+125°C) temperature ranges. The low bus currents
(+220μA/-150μA) present a “1/5 unit load” to the RS-485 bus,
thus allowing up to 160 transceivers on the network without
violating the RS-485 specification’s load limit, and without
using repeaters.
This transceiver requires a 5V ±10% tolerance supply, and
delivers at least a 2.1V differential output voltage over this
supply range. This translates into better noise immunity
(data integrity), longer reach, or the ability to drive up to six
120Ω terminations in “star” or other non-standard bus
topologies, at the exceptional 40Mbps data rate.
SCSI applications benefit from the ISL3159’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.
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic high Rx output if Rx inputs are floating,
shorted, or terminated but undriven. Rx outputs feature high
drive levels (typically >30mA @ V_OL = 1V) to ease the design
of optically isolated interfaces.
Hot Plug circuitry ensures that the Tx and Rx outputs remain
in a high impedance state while the power supply stabilizes.
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
• IEC61000 ESD Protection on RS-485 I/O Pins . . . ±15kV
- Class 3 HBM ESD Level on all Other Pins . . . . . . >9kV
• Large Differential V_OUT . . . . . . . . . . . . . . . 2.8V into 54Ω
Better Noise Immunity, or drive up to 6 Terminations
• High Data Rates . . . . . . . . . . . . . . . . . . . . . up to 40Mbps
• Specified for +125°C Operation
• 11/13ns (Max) Tx/Rx Propagation Delays; 1.5ns (Max)
Skew
• 1/5 Unit Load Allows up to 160 Devices on the Bus
• Full Fail-Safe (Open, Shorted, Terminated/Undriven)
Receiver
• High Rx I_OL to Drive Opto-Couplers for Isolated
Applications
• Hot Plug - Tx and Rx Outputs Remain Three-State During
Power-Up
• Low Quiescent Supply Current . . . . . . . . . . . . . . . . . 4mA
• Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . . 1μA
• -7V to +12V Common Mode Input Voltage Range
• Three-State Rx and Tx Outputs
• Operates from a Single +5V Supply (10% Tolerance)
• Current Limiting and Thermal Shutdown for driver
Overload Protection
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• PROFIBUS^® DP and FMS Networks
• SCSI “Fast 40” Drivers and Receivers
• Motor Controller/Position Encoder Systems
• Factory Automation
• Field Bus Networks
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.