DATASHEET
ISL3280E, ISL3281E, ISL3282E, ISL3283E, ISL3284E
±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
FN6543
Rev 4.01
Mar 31, 2022
The ISL3280E, ISL3281E, ISL3282E, ISL3283E, and ISL3284E
Features
are ±16.5kV IEC61000 ESD Protected, 3.0V to 5.5V powered,
• IEC61000 ESD protection on RS-485 inputs . . . . . . . ±16.5kV
- Class 3 ESD level on all other pins . . . . . . . . . . .>5kV HBM
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.
• Pb-free (RoHS compliant)
• Wide supply range . . . . . . . . . . . . . . . . . . . . . . . . . 3.0V to 5.5V
• Specified for +125°C operation
• Logic supply pin (V ) eases operation in mixed supply
L
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.
systems (ISL3282E, ISL3284E 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
The ISL3280E and ISL3284E feature an always enabled Rx;
the ISL3281E features 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.
• 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
A 26% smaller footprint is available with the ISL3282E TDFN
package. These devices, plus the ISL3284E, also feature a
logic supply pin (V ) that sets the V level of the RO output
L
OH
(and the switching points of the RE/RE input) to be compatible
with another supply voltage in mixed voltage systems.
Applications
• Clock distribution
For companion single RS-485 transmitters in micro packages,
see the ISL3295E, ISL3298E datasheet.
• High node count systems
• Space constrained systems
• Security camera networks
• Building environmental control/lighting systems
• Industrial/process control networks
TABLE 1. SUMMARY OF FEATURES
DATA RATE # DEVICES
RX
ENABLE?
QUIESCENTI
(µA)
LOW POWER
SHUTDOWN?
LEAD
COUNT
CC
PART NUMBER
FUNCTION
1 Rx
(Mbps)
ON BUS
V
PIN?
NO
L
ISL3280E
ISL3281E
ISL3282E
ISL3283E
ISL3284E
20
256
NO
350
350
350
350
350
NO
YES
YES
YES
NO
5-SOT
6-SOT
8-TDFN
6-SOT
6-SOT
1 Rx
20
256
ACTIVE HIGH
ACTIVE LOW
ACTIVE LOW
NO
NO
1 Rx
20
256
YES
NO
1 Rx
20
256
1 Rx
20
256
YES
FN6543 Rev 4.01
Mar 31, 2022
Page 1 of 15
© 2007-2022 Renesas Electronics
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