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參數(shù)資料
| 型號： | IL3285-3E |
| 廠商： | NVE Corp/Isolation Products |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 0K |
| 描述： | TXRX ISO BUS 5MBPS RS485 16SOIC |
| 產(chǎn)品培訓(xùn)模塊： | IsoLoop® Isolator |
| 產(chǎn)品目錄繪圖： | IL3(1,2,4)85 Circuit |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 系列： | IsoLoop® |
| 類型： | 收發(fā)器，隔離式 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS485 |
| 電源電壓： | 3.3V，5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 2771 (CN2011-ZH PDF) |
| 其它名稱： | 390-1126-5 |
IL3285/IL3222
IsoLoop is a registered trademark of NVE Corporation.
*U.S. Patent numbers 5,831,426; 6,300,617 and others.
REV. Q
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
www.isoloop.com
iso-info@nve.com
NVE Corporation
Fractional Load Passive Input RS-485 and RS-422 Isolated Transceivers
Functional Diagrams
R
RE
A
B
Z
R
RE
Y
IL3222
IL3285
A
B
V
COIL2
V
COIL1
V
COIL1
V
COIL2
DE
D
DE
D
IL3285 Truth Table
V(A-B)
DE
D
R
RE
Mode
≥ 200 mV
H
L
Drive
≤200 mV
H
L
Drive
≥ 200 mV
L
X
H
L
Receive
≤200 mV
L
X
L
Receive
X
Z
H
X
Open
L
X
H
L
Receive
Z = High Impedance
X = Irrelevant
IL 3222 Receiver
RE
R
V(A-B)
H
Z
X
L
H
≥ 200 mV
L
≤200 mV
L
H
Open
IL3222 Driver
DE
D
V(Y-Z)
L
X
Z
H
≥ 200 mV
H
L
≤200 mV
Features
3 V to 5 V power supplies
5 Mbps data rate
unit load
15 kV bus ESD protection
2,500 VRMS isolation (1 minute)
20 kV/s typical common mode rejection
No carrier or clock for low EMI emissions and susceptibility
40°C to +85°C temperature range
Thermal shutdown protection
UL 1577 recognized; IEC 60747-5-5 (VDE 0884) certified
0.15", 0.3", or True 8 mm 16-pin SOIC packages
Applications
High node-count networks
Security networks
Building environmental controls
Industrial control networks
Gaming systems
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 load, and the IL3222 at least 2 V
into a 100 load for 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.
A unique ceramic/polymer composite barrier provides
excellent isolation and virtually unlimited barrier life.
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 k is eight times the RS-485
“Unit Load” (UL) minimum of 12 k. Thus these products
are known as “one-eighth UL” transceivers. There can be up
to 256 on a network while still complying with the RS-485
loading specification.
Selection Table
Model
Full/Half
Duplex
No. of Devices
Allowed on Bus
Data Rate
Mbps
Fail-Safe
IL3285
half
256
5
yes
IL3222
full
256
5
yes
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