ISO7241A-EP Datasheet, PDF (1/17 Pages) Texas Instruments – 1-Mbps QUAD DIGITAL ISOLATORS

ISO7241A-EP
www.ti.com
1-Mbps QUAD DIGITAL ISOLATORS
Check for Samples: ISO7241A-EP
SLLSE18 – JANUARY 2010
FEATURES
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• 4000-V_peak Isolation, 560-V_peak V_IORM
– UL 1577 , IEC 60747-5-2 (VDE 0884, Rev 2),
IEC 61010-1, IEC 60950-1 and CSA
Approved
• 4-kV ESD Protection
• Operates With 3.3-V or 5-V Supplies
• Typical 25-Year Life at Rated Working Voltage
(See Application Note (SLLA197 ) and
Figure 10)
• High Electromagnetic Immunity
(See Application Report (SLLA181))
APPLICATIONS
• Industrial Fieldbus
• Computer Peripheral Interface
• Servo Control Interface
• Data Acquisition
SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Military (–55°C/125°C)
Temperature Range⁽¹⁾
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
ISO7241A
(TOP VIEW)
V_CC1 1
GND1 2
IN_A 3
IN_B 4
IN_{C 5}
OUT_D 6
EN₁ 7
GND1 8
16 VCC2
15 GND2
14 OUT_A
13 OUT_B
12 OUT_C
11 IN_D
10 EN₂
9 GND2
(1) Additional temperature ranges available - contact factory
DESCRIPTION
See the Product Notification section. The ISO7241A is a quad-channel digital isolator with multiple channel
configurations and output enable functions. This device has logic input and output buffers separated by TI’s
silicon dioxide (SiO₂) isolation barrier. Used in conjunction with isolated power supplies, this device blocks high
voltage, isolate grounds, and prevent noise currents from entering the local ground and interfering with or
damaging sensitive circuitry.
The ISO7241A has three channels the same direction and one channel in opposition.
This device has TTL input thresholds and a noise-filter at the input that prevents transient pulses from being
passed to the output of the device.
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. (See ISO7240CF (SLLS869) or contact TI for a logic low failsafe option).
The ISO7241A 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.
This device is characterized for operation over the ambient temperature range of –55°C to 125°C.
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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 © 2010, Texas Instruments Incorporated