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ISO7242C

更新时间： 2024-11-05 04:22:51
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德州仪器 - TI /
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25页 768K
描述
QUAD DIGITAL ISOLATORS

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ISO7242C 数据手册

 浏览型号ISO7242C的Datasheet PDF文件第2页浏览型号ISO7242C的Datasheet PDF文件第3页浏览型号ISO7242C的Datasheet PDF文件第4页浏览型号ISO7242C的Datasheet PDF文件第5页浏览型号ISO7242C的Datasheet PDF文件第6页浏览型号ISO7242C的Datasheet PDF文件第7页 
ISO7240  
ISO7241  
ISO7242  
www.ti.com  
SLLS868A–SEPTEMBER 2007–REVISED DECEMBER 2007  
QUAD DIGITAL ISOLATORS  
1
FEATURES  
•
1, 25, and 150-Mbps Signaling Rate Options  
•
•
High Electromagnetic Immunity  
(see application report SLLA181)  
–
–
–
Low Channel-to-Channel Output Skew;  
1 ns Max  
–40°C to 125°C Operating Range  
Low Pulse-Width Distortion (PWD);  
2 ns Max  
APPLICATIONS  
•
•
•
•
Industrial Fieldbus  
Low Jitter Content; 1 ns Typ at 150 Mbps  
Computer Peripheral Interface  
Servo Control Interface  
Data Acquisition  
•
Typical 25-Year Life at Rated Working Voltage  
(see application note SLLA197 and Figure 15)  
•
•
•
•
4000-Vpeak Isolation, 560-Vpeak Working Voltage  
UL 1577 Certified  
4 kV ESD Protection  
Operate With 3.3-V or 5-V Supplies  
DESCRIPTION  
The ISO7240, ISO7241 and ISO7242 are quad-channel digital isolators 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 from entering the local ground and interfering with or damaging  
sensitive circuitry.  
The ISO7240 has all four channels in the same direction while the ISO7241 has three channels the same  
direction and one channel in opposition. The ISO7242 has two channels in each direction.  
The A and C option devices have TTL input thresholds and a noise-filter at the input that prevents transient  
pulses from being passed to the output of the device. The M option devices have CMOS Vcc/2 input thresholds  
and do not have the input noise-filter or the additional propagation delay.  
A periodic update pulse is sent across the 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 may be powered from either 3.3-V or 5-V supplies on either side in any 3.3-V / 3.3-V, 5-V / 5-V,  
5-V / 3.3-V, or 3.3-V / 5-V combination. Note that the signal input pins are 5-V tolerant regardless of the voltage  
supply level being used.  
These devices are characterized for operation over the ambient temperature range of –40°C to 125°C.  
ISO7240  
ISO7241  
ISO7242  
V
V
V
V
V
V
CC2  
1
2
3
4
5
6
7
8
16  
15  
1
2
3
4
5
6
7
8
16  
15  
1
2
3
4
5
6
7
8
16  
15  
CC1  
CC2  
CC1  
CC2  
CC1  
GND1  
GND2  
GND1  
GND2  
GND1  
GND2  
IN  
A
IN  
B
IN  
C
14  
13  
12  
11  
10  
9
OUT  
A
IN  
IN  
IN  
14  
13  
12  
11  
10  
9
OUT  
A
IN  
IN  
14  
13  
12  
11  
10  
9
OUT  
A
A
B
C
A
OUT  
B
OUT  
B
OUT  
B
B
OUT  
C
OUT  
C
OUT  
OUT  
IN  
C
C
OUT  
D
OUT  
IN  
D
IN  
D
IN  
D
D
D
EN  
EN  
1
EN  
NC  
EN  
2
EN  
2
1
GND1  
GND2  
GND1  
GND2  
GND1  
GND2  
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.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2007, Texas Instruments Incorporated  
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