ISL3283E

±16.5kV ESD Protected, SOT-23, 20Mbps, with active low Rx enable, RS-485/RS-422 Receiver

Product Status: Mass Production

OVERVIEW

"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 (+125µA/-100µA), 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 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 datasheet."

KEY 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: 500µA (max)
  • Very low shutdown supply current: 20µA (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

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL3283E
Basic Information
Production Status
Mass Production
Key Feature
High Speed
# of Rx
1
Devices Allowed on Bus
256
Half/Full Duplex
N/A
High ESD Protection
Yes-IEC61000
Hot Plug
No
Data Rate
20 Mbps
Supply Voltage Vcc (Min) (V)
3
Supply Voltage Vcc (Max) (V)
5.5
Slew Rate Limited
N/A
Tx/Rx Enable
Yes - Active Low
IS Enabled/Disabled
400 µA
SHDN ICC
<20 μA
VL Pin
No
Qualification Level
Standard
Supply Voltage Vcc Range (V)
3.0 to 5.5
Can Sample
YES
Temperature Range
-40 to +125

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