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ISO7231MDWG4 Datasheet(PDF) 1 Page - Texas Instruments |
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ISO7231MDWG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 23 page 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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