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ISL3280E| Datasheet

By datasheet - October 30th, 2008

ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E

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ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E
Data Sheet October 18, 2007 FN6543.2

16.5kV ESD Protected, +125 C, 3.0V to 5.5V, SOT-23/TDFN Packaged, 20Mbps, Full Fail-safe, Low Power, RS-485/RS-422 Receivers
The Intersil ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E, ISL3285E are 16.5kV IEC61000 ESD Protected, 3.0V to 5.5V powered, single receivers that meet both the RS-485 and RS-422 standards for balanced communication. These receivers have very low bus currents (+125uA/-100uA), so they present a true "1/8 unit load" to the RS-485 bus. This allows up to 256 receivers on the network without violating the RS-485 specification's 32 unit load maximum and without using repeaters. Receiver inputs feature a "Full Fail-Safe" design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven. The ISL3280E and ISL3284E feature an always enabled Rx; the ISL3281E and ISL3285E feature an active high Rx enable pin, and the ISL3282E and ISL3283E include an active low enable pin. All versions are offered in Industrial and Extended Industrial (-40 C to +125 C) temperature ranges. A 26% smaller footprint is available with the ISL3282E and ISL3285E TDFN package. These devices, plus th
e ISL3284E, also feature a logic supply pin (VL) that sets the VOH level of the RO output (and the switching points of the RE / RE input) to be compatible with another supply voltage in mixed voltage systems. For companion single RS-485 transmitters in micro packages, please see the ISL3293E, ISL3294E, ISL3295E, ISL3296E, ISL3297E, ISL3298E data sheet.

Features
IEC61000 ESD Protection on RS-485 Inputs . . . 16.5kV - Class 3 ESD Level on all Other Pins . . . . . . >5kV HBM Pb-Free (RoHS Compliant) Wide Supply Range . . . . . . . . . . . . . . . . . . . 3.0V to 5.5V Specified for +125 C Operation Logic Supply Pin (VL) Eases Operation in Mixed Supply Systems (ISL3282E, ISL3284E, ISL3285E Only) Full Fail-safe (Open, Short, Terminated/Undriven) True 1/8 Unit Load Allows up to 256 Devices on the Bus High Data Rates . . . . . . . . . . . . . . . . . . . . . up to 20Mbps Low Quiescent Supply Current . . . . . . . . . . 500uA (Max) - Very Low Shutdown Supply Current . . . . . . 20uA (Max) -7V to +12V Common Mode Input Voltage Range Tri-statable Rx Available (Active Low or High EN Input) 5V Tolerant Logic Inputs When VCC 5V

Applications
Clock Distribution High Node Count Systems Space Constrained Systems Security Camera Networks Building Environmental Control/Lighting Systems Industrial/Process Control Networks

TABLE 1. SUMMARY OF FEATURES PART NUMBER ISL3280E ISL3281E ISL3282E ISL3283E ISL3284E ISL3285E FUNCTION 1 Rx 1 Rx 1 Rx 1 Rx 1 Rx 1 Rx DATA RATE (Mbps) 20 20 20 20 20 20 # DEVICES ON BUS 256 256 256 256 256 256 RX ENABLE? NO ACTIVE HIGH ACTIVE LOW ACTIVE LOW NO ACTIVE HIGH VL PIN? NO NO YES NO YES YES QUIESCENT ICC (uA) 350 350 350 350 350 350 LOW POWER SHUTDOWN? NO YES YES YES NO YES LEAD COUNT 5-SOT 6-SOT 8-TDFN 6-SOT 6-SOT 8-TDFN

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.


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