ISO7421DR Part Information

Details for ISO7421DR by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs

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Part Description

The ISO7420, ISO7420M and ISO7421 provide galvanic isolation up to 2500 VRMS 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). These devices have TTL input thresholds and require two supply voltages, 3.3 or 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V 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 <20 ns if desired.

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Part Features

  • 3.3-V and 5-V Level Translation
  • 50-kV/u03bcs Transient Immunity, Typical
  • Highest Signaling Rate: 1 Mbps
  • Low Power Consumption, Typical ICC per Channel (3.3-V operation): u2013 ISO7420: 1.1 mA, ISO7421: 1.5 mA
  • Low Propagation Delay u2013 9 ns Typical
  • Low Skew u2013 300 ps Typical
  • Narrow Body SOIC-8 Package
  • Operates From 3.3-V and 5-V Supply and Logic Levels
  • Over 25-Year Isolation Integrity at Rated Voltage
  • Safety and Regulatory Approvals:
  • Wide TA Range: u201340u00b0C to 125u00b0C (M-Grade)

Part Specifications

No. of Channels 2 Channel
Propagation Delay 9ns
Supply Voltage Min 3.15V
Supply Voltage Max 5.25V
Interface Case Style SOIC
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • DIGITAL ISOLATOR, 2-CH, 1MBPS, SOIC-8 | Newark Electronics
  • Dual-channel, 1/1, 1-Mbps digital isolator | Texas Instruments

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