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ISO7231MDW Datasheet(PDF) 1 Page - Texas Instruments

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Part # ISO7231MDW
Description  HIGH SPEED, TRIPLE DIGITAL ISOLATORS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ISO7231MDW Datasheet(HTML) 1 Page - Texas Instruments

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1
FEATURES
APPLICATIONS
DESCRIPTION
1
2
3
4
5
6
7
8
ISO7230
DWPACKAGE
9
10
11
12
13
14
15
16
NC
NC
INA
GND1
VCC1
NC
GND1
GND2
GND2
INB
INC
OUTA
OUTC
OUTB
EN
VCC2
1
2
3
4
5
6
7
8
ISO7231
DWPACKAGE
9
10
11
12
13
14
15
16
NC
INA
GND1
VCC1
NC
GND1
GND2
GND2
INB
INC
OUTA
OUTC
OUTB
EN2
VCC2
EN1
ISO7230C, ISO7230M
ISO7231C, ISO7230M
www.ti.com.................................................................................................................................................. SLLS867F – SEPTEMBER 2007 – REVISED JUNE 2008
HIGH SPEED, TRIPLE DIGITAL ISOLATORS
• 25 and 150-Mbps Signaling Rate Options
• High Electromagnetic Immunity
(See Application Note SLLA181)
Low Channel-to-Channel Output Skew;
• –40°C to 125°C Operating Range
1 ns max
Low Pulse-Width Distortion (PWD);
2 ns max
• Industrial Fieldbus
Low Jitter Content; 1 ns Typ at 150 Mbps
• Computer Peripheral Interface
• Typical 25-Year Life at Rated Working Voltage
• Servo Control Interface
(See Application Note SLLA197 and Figure 14)
• Data Acquisition
• 4000-V
peak Isolation, 560-Vpeak VIORM
UL 1577, IEC 60747-5-2 (VDE 0884, Rev 2),
IE 61010-1 and CSA Approved
• 4 kV ESD Protection
• Operate With 3.3-V or 5-V Supplies
The ISO7230 and ISO7231 are triple-channel digital isolators each with multiple channel configurations and
output enable functions. These devices have logic input and output buffers separated by TI’s silicon dioxide
(SiO2) isolation barrier. Used in conjunction with isolated power supplies, these devices block high voltage,
isolate grounds, and prevent noise currents on a data bus or other circuits from entering the local ground and
interfering with or damaging sensitive circuitry.
The ISO7230 triple-channel device has all three channels in the same direction while the ISO7231 has two
channels in one direction and one channel in opposition. These devices have an active-high output enable that
when driven to a low level, places the output in a high-impedance state.
The ISO7230C and ISO7231C have TTL input thresholds and a noise-filter at the input that prevents transient
pulses of up to 2 ns in duration from being passed to the output of the device, while the ISO7230M and
ISO7231M have CMOS VCC/2 input thresholds and do not have the input noise-filter or the additional propagation
delay.
In each device, a periodic update pulse is sent across the isolation barrier to ensure the proper dc level of the
output. If this dc-refresh pulse is not received, the input is assumed to be unpowered or not being actively driven,
and the failsafe circuit drives the output to a logic high state. (Contact TI for a logic low failsafe option).
These devices require two supply voltages of 3.3-V, 5-V, or any combination. All inputs are 5-V tolerant when
supplied from a 3.3-V supply and all outputs are 4-mA CMOS. These devices are characterized for operation
over the ambient temperature range of –40°C to 125°C.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007–2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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