ISO7421D Part Information

Details for ISO7421D by Texas Instruments

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

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, 2Channels
Propagation Delay 12ns
Supply Voltage Min 3.15V
Supply Voltage Max 3.45V
Interface Case Style SOIC
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 105°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
Supply Current 2mA
RoHS Compliant

Alternative Part Descriptions

  • Low-Power Dual Digital Isolator 1M SOIC8 | RS Components
  • Digital Isolator, Dual, 2, 12 ns, 3.15 V, 3.45 V, SOIC, 8 RoHS Compliant: Yes | Newark Electronics
  • Dual-channel, 1/1, 1-Mbps digital isolator | Texas Instruments
  • Digital isolator [Texas Instruments] ISO7421D Digital isolator | Distrelec

Frequently Asked Questions

Where can I find additional details, specifications and documents for a ISO7421D?

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What category does ISO7421D fall under?

The ISO7421D is listed under Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs.

Can I view similar or alternative parts?

You can view similar parts to ISO7421D when available in the Driver & Interface ICs range under the specifications section at the bottom of the details page.

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Is the ISO7421D RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

Which authorised distributors for ISO7421D have stock available?

Authorised distributors including RS Components, Newark Electronics, Texas Instruments and Distrelec have stock available or on a lead time for ISO7421D.

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