IL3285-3E NVE, IL3285-3E Datasheet

TXRX ISO BUS 5MBPS RS485 16SOIC

IL3285-3E

Manufacturer Part Number
IL3285-3E
Description
TXRX ISO BUS 5MBPS RS485 16SOIC
Manufacturer
NVE
Series
IsoLoop®r
Datasheet

Specifications of IL3285-3E

Inputs - Side 1/side 2
RS-485
Number Of Channels
1
Isolation Rating
2500Vrms
Voltage - Supply
4.25V, 5V
Data Rate
5Mbps
Propagation Delay
100ns
Output Type
Logic
Package / Case
16-SOIC (3.9mm Width)
Operating Temperature
-40°C ~ 85°C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
390-1126-5
Functional Diagrams
IL3285 Truth Table
Selection Table
IsoLoop
*U.S. Patent number 5,831,426; 6,300,617 and others.
IL 3222 Receiver
Z = High Impedance
≤−200 mV
≤−200 mV
IL3285
IL3222
≥ 200 mV
≥ 200 mV
Model
RE
NVE Corporation
H
L
L
L
V
Open
(A-B)
X
®
Fractional Load RS-485 and RS-422 Isolated Transceivers
is a registered trademark of NVE Corporation.
Full/Half
R
H
H
Z
L
V
V
Duplex
COIL1
COIL1
half
full
DE
RE
DE
RE
DE
D
D
R
R
H
H
L
L
X
L
≤−200 mV
11409 Valley View Road, Eden Prairie, MN 55344-3617
≥ 200 mV
IL3285
IL3222
V
Open
(A-B)
X
X = Irrelevant
Allowed on Bus
No. of Devices
D
H
X
X
X
X
L
256
256
R
H
H
Z
H
L
L
IL3222 Driver
DE
L
H
H
RE
H
L
L
L
L
L
Data Rate
Mbps
D
X
H
L
5
5
V
A
B
Y
Z
V
A
B
Receive
Receive
Receive
COIL2
COIL2
Mode
Drive
Drive
X
≤−200 mV
≥ 200 mV
V
(Y-Z)
Fail-Safe
Z
yes
yes
Phone: (952) 829-9217
Features
Applications
Description
The IL3285 and IL3222 are galvanically isolated, differential
bus transceivers designed for bidirectional data
communication over balanced transmission lines. The devices
use NVE’s patented* IsoLoop spintronic Giant
Magnetoresistance (GMR) technology. The IL3285 delivers at
least 1.5 V into a 54 Ω load, and the IL3222 at least 2 V into a
100 Ω load, allowing excellent data integrity over long cables.
These devices are also compatible with 3.3 V input supplies,
allowing interface to standard microcontrollers without
additional level shifting.
Both the IL3285 and IL3222 have current limiting and
thermal shutdown features to protect against output short
circuits and bus contentions that may cause excessive power
dissipation. The receivers also incorporate a “fail-safe if open”
design, ensuring a logic high on R if the bus lines are
disconnected or “floating.”
Receiver input resistance of 96 kΩ is eight times the RS-485
“Unit Load” (UL) minimum of 12 kΩ. Thus these products
are known as “one-eighth UL” transceivers. There can be up
to 256 of these devices on a network while still complying
with the RS-485 loading specification.
A capacitor (C
current limit resistor to ensure the full specified performance.
3.3 V / 5 V Input Supply Compatible
5 Mbps Data Rate
⅛ Unit Load
±15 kV ESD Protection
2500 V
20 kV/µs Typical Common Mode Rejection
15 kV bus ESD protection
Low EMC Footprint
−40°C to +85°C Temperature Range
Thermal Shutdown Protection
UL1577 and IEC 61010-2001 Approved
0.15" or 0.3" 16-pin SOIC Packages
High Node-Count Networks
Security Networks
Building Environmental Controls
Industrial Control Networks
Gaming Systems
RMS
Fax: (952) 829-9189
Isolation (1 minute)
Boost
; see page 7) must be placed across the
IL3285/IL3222
www.IsoLoop.com
©NVE Corporation
REV. K

Related parts for IL3285-3E

IL3285-3E Summary of contents

Page 1

... Receive additional level shifting. L Receive H X Both the IL3285 and IL3222 have current limiting and L Receive thermal shutdown features to protect against output short circuits and bus contentions that may cause excessive power dissipation. The receivers also incorporate a “fail-safe if open” design, ensuring a logic high the bus lines are ...

Page 2

... Barrier Impedance Leakage Current Safety Approvals IEC61010-2001 TUV Certificate Numbers: N1502812, N1502812-101 Classification: Reinforced Insulation Model IL3222E, IL3285E, IL3222-3E, IL3285-3E UL 1577 Rated 2500 V for 1 minute RMS Component Recognition Program File Number: E207481 Soldering Profile Per JEDEC J-STD-020C, MSL=2 Electrostatic Discharge Sensitivity This product has been tested for electrostatic sensitivity to the limits stated in the specifications ...

Page 3

... IL3285-3 Pin Connections (0.15" SOIC Package Input power supply DD1 2 GND Ground return for Output data from bus 3 Read enable high high impedance) DE Drive enable Coils for DE and D (connect to V COIL1 7 D Data input to bus internal connection 9 GND Ground return for V ...

Page 4

... IL3285 Pin Connections (0.3" SOIC Package Input power supply DD1 2 GND Ground return for Output data from bus 3 Read enable high high impedance) DE Drive enable Coils for DE and D (connect to V COIL1 7 D Data input to bus V ground return for 0.3" package ...

Page 5

... Min. Typ (OD ( (OD PZH t 25 PZL t 25 PHZ t 25 PLZ t (LIM) SK |CM |,| Phone: (952) 829-9217 Fax: (952) 829-9189 IL3285/IL3222 Max. Units Test Conditions T = 25°C Ω||nH AMB Ω/° 100 Ω Ω Ω or 100 Ω ±0 Ω or 100 Ω ...

Page 6

... DD1 A with a 54 Ω load is either ½ 1.5 V, whichever is greater. OD2 OD1 and V , respectively, that occur when the input is changed from one logic state to the other Phone: (952) 829-9217 IL3285/IL3222 Max. Units Test Conditions T = 25°C Ω||nH AMB Ω/°C ...

Page 7

... NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 The IL3222 and IL3285 are current-mode devices. Changes in input coil current switch internal spintronic GMR sensors, which then change the logic state of the outputs. The GMR bridge is designed so the output of the isolator is logic high when no field signal is present ...

Page 8

... Approximate Immunity ±20 Gauss ±70 Gauss ±250 Gauss 8 Phone: (952) 829-9217 IL3285/IL3222 Immunity Description A DC current flowing in a conductor 1 cm from the device could cause disturbance A DC current flowing in a conductor 1 cm from the device could cause disturbance A DC current of 200 A flowing in a conductor ...

Page 9

... The RS485/422 driver is a differential output device that delivers at least 1.5 V across a 54 Ω load (RS-485), and at least 2 V across a 100 Ω load (RS-422). The driver features low propagation delay skew to maximize bit width and minimize EMI. IL3222 and IL3285 drivers have tri-state capability with an active high DE input. Cabling, Data Rate and Terminations Cabling: Use twisted-pair cable. The cable can be unshielded short (< ...

Page 10

... In RS-422 systems only the receiver end should be terminated. Unterminated Proper termination is imperative when using IL3285 and IL3222 to minimize reflections. Unterminated lines are only suitable for very low data rates and very short cable runs, otherwise line reflections cause problems. Parallel terminations are the most popular. ...

Page 11

... Proper biasing can ensure fail-safe operation, that is a known state when there are no active drivers on the bus. IL3285 and IL3222 Isolated Transceivers include internal pull-up and pull-down resistors of approximately 200 kΩ in the receiver section (R figure below) ...

Page 12

... NOTE: Pin spacing is a BASIC dimension; tolerances do not accumulate 12 Phone: (952) 829-9217 IL3285/IL3222 NOM 0.054 (1.4) 0.072 (1.8) 0.004 (0.1) 0.012 (0.3) 0.287 (7.29) 0.300 (7.62) NOM 0.016 (0.4) 0.050 (1.3) ...

Page 13

... SOIC Channel Configuration 22 = RS-422 85 = RS-485 Base Part Number 32 = Passive-In, 1/8-Load Transceiver Product Family IL = Isolators 13 Phone: (952) 829-9217 Fax: (952) 829-9189 IL3285/IL3222 Valid Part Numbers IL3285E IL3285E TR13 IL3285-3E IL3285-3E TR13 IL3222E IL3222E TR13 IL3222-3E IL3222-3E TR13 RoHS COMPLIANT www.IsoLoop.com ©NVE Corporation ...

Page 14

... Changes • ISB-DS-001-IL3285/22-F Changes • ISB-DS-001-IL3285/22-E Changes • ISB-DS-001-IL3285/22-D Changes • • • ISB-DS-001-IL3285/22-C Changes ISB-DS-001-IL3285/22-B Revision A not released ISB-DS-001-IL3285/22-A Internal Release ONLY NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Changes to current-limiting resistor values (pp. 7 and 10). Details for boost capacitor selection (p. 7). ...

Page 15

... NVE Corporation product for use in life support devices or systems or other critical applications, without the express written approval of the President of NVE Corporation. Specifications are subject to change without notice. ISB-DS-001-IL3285/22-K August 2009 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 IL3285/IL3222 15 Phone: (952) 829-9217 Fax: (952) 829-9189 www.IsoLoop.com ©NVE Corporation ...

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