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ISO7420MD Datasheet(PDF) 1 Page - Texas Instruments |
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ISO7420MD Datasheet(HTML) 1 Page - Texas Instruments |
1 / 20 page P0066-08 V CC1 OUTA INB GND1 V CC2 INA OUTB GND2 ISO7421 D Package (Top View) 1 2 3 4 8 7 6 5 V CC1 INA INB GND1 V CC2 OUTA OUTB GND2 ISO7420 D Package (Top View) 1 2 3 4 8 7 6 5 ISO7420, ISO7420M ISO7421, ISO7421M www.ti.com SLLS984D – JUNE 2009 – REVISED JULY 2010 Low-Power Dual Digital Isolators Check for Samples: ISO7420, ISO7420M, ISO7421, ISO7421M 1 FEATURES APPLICATIONS • Optocoupler Replacement in: 2 • Highest Signaling Rate: 1 Mbps – Industrial Fieldbus • Low Power Consumption, Typical ICC per – Profibus Channel (3.3V operation): – Modbus – ISO7420: 1.1 mA, ISO7421: 1.5 mA – DeviceNet™ Data Buses • Low Propagation Delay – 9 ns Typ. and Low – Servo Control Interface Skew – 300 ps Typ. – Motor Control • Wide TA Range Specified: –40°C to 125°C – Power Supplies • 4-kVpeak Maximum Isolation, 2.5 kVrms per – Battery Packs UL 1577, IEC/VDE and CSA Approvals, IEC 60950-1, IEC 61010-1 End Equipment Standards Approvals. All Approvals Pending. • 50 kV/ms Transient Immunity, Typical • Over 25-Year Isolation Integrity at Rated Voltage • Operates From 3.3V and 5V Supply and Logic Levels DESCRIPTION The ISO7420, ISO7420M, ISO7421, and ISO7421M provide galvanic isolation up to 2.5 kVrms for 1 minute per UL. These digital isolators have two isolated channels. Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging sensitive circuitry. The suffix M indicates wide temperature range (–40°C to 125°C). The devices have TTL input thresholds and require two supply voltages, 3.3V or 5V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3V supply. Note: The ISO7420 and ISO7421 are specified for signaling rates up to 1 Mbps. Due to their fast response time, under most cases, these devices will also transmit data with much shorter pulse widths. Designers should add external filtering to remove spurious signals with input pulse duration < 20ns if desired. SPACER 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. 2 DeviceNet is a trademark of Texas Instruments. UNLESS OTHERWISE NOTED this document contains Copyright © 2009–2010, Texas Instruments Incorporated PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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