ISL3280E

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 Operation
• Logic Supply Pin (V_L) 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 . . . . . . . . . . 500A (Max)
- Very Low Shutdown Supply Current. . . . . . 20A (Max)
• -7V to +12V Common Mode Input Voltage Range
• Tri-statable Rx Available (Active Low or High EN Input)
• 5V Tolerant Logic Inputs When V_CC 5V




Application

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




Pinout






Specifications

V_CC to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . . -0.3V to 7V
V_L to GND (ISL3282E, ISL3284E, ISL3285E Only). . -0.3V to (V_CC+0.3V)
Input Voltages
RE,RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . . . -0.3V to 7V
Input/Output Voltages
A, B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . . -8V to +13V
RO (Not ISL3282E, ISL3284E, ISL3285E). .. .. .. . -0.3V to (V_CC +0.3V)
RO (ISL3282E, ISL3284E, ISL3285E) . . . . .. .. .. . . -0.3V to (V_L +0.3V)
Short Circuit Duration
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . . . . . . . . Indefinite
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. . See Specification Table

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.
NOTE:
4. _JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
5. _JA is measured in free air with the component mounted on a high effective thermal conductivity test board with "direct attach" features. See Tech Brief TB379.
6. For _JC, the "case temp" location is the center of the exposed metal pad on the package underside.

Description

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 (+125A/-100A), 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 specifications 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 (-40C to +125C) temperature ranges. A 26% smaller footprint is available with the ISL3282E and ISL3285E TDFN package. These devices, plus the 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.