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DATASHEET
ISL83080E/82E/83E/85E/86E/88E
±15kV ESD, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceivers
FN6085 Rev 10.01 Jul 5, 2022
The ISL8308xE (ISL83080E, ISL83082E, ISL83083E, ISL83085E, ISL83086E, ISL83088E) are BiCMOS, ESD protected, 5V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each driver output, and receiver input, is protected against ±15kV ESD strikes without latch-up, and unlike competitive products, this family is specified for 10% tolerance supplies (4.5V to 5.5V).
These devices have very low bus currents (+125µA/-75µA), so they present a true 1/8 unit load to the RS-485 bus. This allows up to 256 transceivers on the network without violating the RS-485 specification’s 32 unit load maximum, and without using repeaters. For example, in a remote utility meter reading system, individual meter readings are routed to a concentrator via an RS-485 network, so the high allowed node count minimizes the number of repeaters required. Data for all meters is then read out from the concentrator via a single access port, or a wireless link.
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.
The ISL83080E, ISL83082E, ISL83083E, ISL83085E use slew rate limited drivers which reduce EMI, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. Slew rate limited versions also include receiver input filtering to enhance noise immunity in the presence of slow input signals.
Hot Plug circuitry ensures that the Tx and Rx outputs remain in a high impedance state until the power supply has stabilized, and the Tx outputs are fully short circuit protected.
The ISL83080E, ISL83083E, ISL83086E are configured for full duplex (separate Rx input and Tx output pins) applications. The half duplex versions multiplex the Rx inputs and Tx outputs to allow transceivers with output disable functions in 8 Ld packages.
Features
• Pb-Free Available (RoHS Compliant) • RS-485 I/O Pin ESD Protection . . . . . . . . . . ±15kV HBM
Class 3 ESD Protection (HBM) on all Pins. . . . . . . . >7kV • Tiny MSOP Packages Save 50% Board Space • Full Fail-Safe (Open, Short, Terminated and Floating)
Receivers • Hot Plug Circuitry (ISL83080E, ISL83082E, ISL83083E,
ISL83085E) - Tx and Rx Outputs Remain Three-state During
Power-up/Power-down • True 1/8 Unit Load Allows up to 256 Devices on the Bus • Specified for Single 5V, 10% Tolerance, Supplies • High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 10Mbps • Low Quiescent Supply Current . . . . . . . . . . . . . . . 530µA
Ultra Low Shutdown Supply Current . . . . . . . . . . . . 70nA • -7V to +12V Common Mode Input Voltage Range • Half and Full Duplex Pinouts • Three-State Rx and Tx Outputs • Current Limiting and Thermal Shutdown for driver
Overload Protection
Applications
• Automated Utility Meter Reading Systems • High Node Count Systems • Factory Automation • Field Bus Networks • Security Camera Networks • Building Environmental Control Systems • Industrial/Process Control Networks
PART NUMBER ISL83080E ISL83082E ISL83083E ISL83085E ISL83086E ISL83088E
HALF/FULL DUPLEX Full Half Full Half Full Half
DATA RATE (Mbps)
0.115
0.115
0.5
0.5
10
10
TABLE 1. SUMMARY OF FEATURES
SLEWRATE LIMITED?
Yes
HOT PLUG
Yes
# DEVICES ON BUS
256
Rx/Tx ENABLE?
Yes
QUIESCEN T ICC (µA)
530
LOW POWER SHUTDOWN?
Yes
PIN COUNT
10, 14
Yes
Yes
256
Yes
530
Yes
8
Yes
Yes
256
Yes
530
Yes
10, 14
Yes
Yes
256
Yes
530
Yes
8
No
No
256
Yes
530
Yes
10, 14
No
No
256
Yes
530
Yes
8
FN6085 Rev 10.01 Jul 5, 2022
Page 1 of 20 © 2004-2022 Renesas Electronics
ISL83080E/82E/83E/85E/86E/88E
Pinouts
ISL83082E, ISL83085E, ISL83088E (8 LD MSOP, SOIC) TOP VIEW
RO 1 R
RE 2
DE 3
DI 4
D
8 VCC 7 B/Z 6 A/Y 5 GND
ISL83080E, ISL83083E, ISL83086E (10 LD MSOP) TOP VIEW
RO 1 R
RE 2
DE 3
DI 4
D
GND 5
10 VCC 9A 8B 7Z 6Y
ISL83080E, ISL83083E, ISL83086E (14 LD SOIC) TOP VIEW
NC 1
RO 2
RE 3
R
DE 4
DI 5
D
GND 6
GND 7
14 VCC 13 NC 12 A 11 B 10 Z 9Y 8 NC
Truth Tables
TRANSMITTING
INPUTS
OUTPUTS
RE
DE
DI
Z
Y
X
1
1
0
1
X
1
0
1
0
0
0
X
High-Z
High-Z
1
0
X
High-Z * High-Z*
NOTE: *Shutdown Mode (See Note 11).
RECEIVING
INPUTS
RE
DE
DE
A-B
Half Duplex Full Duplex
0
0
X
-0.05V
0
0
X
-0.2V
0
0
X
Inputs
Open/Shorted
1
0
0
X
1
1
1
X
NOTE: *Shutdown Mode (See Note 11).
OUTPUT RO
1 0 1
High-Z* High-Z
Pin Descriptions
PIN
FUNCTION
RO
Receiver output: If A - B -50mV, RO is high; If A - B -200mV, RO is low; RO = High if A and B are unconnected (floating)
or shorted.
RE
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
DE
Driver output enable. The driver outputs, Y and Z, ar.