Instant Quote

Home > Integrated Circuits ICs > ISO7421DR

ISO7421DR

Dual 1/1 digital isolator, 2500Vrms, 1Mbps, 9ns prop delay, 8-SOIC

10233

Effective Inventory
Go to Inquiry

Image for reference only

Manufacturer Part：

ISO7421DR

Package：

8-SOIC (4.90 x 6.00 x 1.50 mm)

Brand：
Product Categories：
Quality Commitment
Shipping & Payment
Service & Packaging
Product Manual
Other recommendations you may be interested in.

STM32L072RBT6

TPS65217CRSLR

SN74HC273NSR

ADE7953ACPZ-RL

SN74HC138N

ATMEGA328-AU

AD826ARZ-REEL7

TPA0211DGNR

Description

Product Overview

The ISO7421DR from Texas Instruments is a dual-channel 1/1 digital isolator in an 8-SOIC package. Using capacitive SiO2 isolation, it provides 2500Vrms galvanic isolation with 1Mbps data rate and 9ns typical propagation delay for industrial communication interfaces.

Key Specifications

Channels 2 (1 forward / 1 reverse)
Data Rate 1Mbps
Isolation Voltage 2500Vrms (1 min, UL1577)
CMTI 25kV/us minimum
Propagation Delay 9ns typical, 14ns max
Supply Voltage 3.3V / 5V (both sides)
Package 8-SOIC (narrow body)
Operating Temperature -40°C to +105°C

Features

  • Dual-channel with 1 forward / 1 reverse configuration
  • 2500Vrms isolation per UL1577
  • 4242Vpk transient isolation per VDE 0884-10
  • Capacitive SiO2 isolation barrier
  • 3.3V to 5V level translation between sides
  • Low 1.5mA per channel current consumption

Applications

  • Industrial RS-485/RS-232 interface isolation
  • SPI / I2C communication isolation
    • Motor drive signal isolation Medical equipment isolation barriers Power supply feedback loop isolation

The ISO7421DR from Texas Instruments is a dual-channel digital isolator with one forward and one reverse channel in a narrow-body 8-SOIC package. Using capacitive coupling through a silicon dioxide (SiO2) insulation barrier, it provides 2500Vrms galvanic isolation for one minute per UL1577 and 4242Vpk per VDE 0884-10. The device supports data rates up to 1Mbps with 9ns typical propagation delay. It operates from 3.3V or 5V supplies on either side, enabling level translation across the isolation barrier. Typical current consumption is 1.5mA per channel at 3.3V.

The ISO7421DR uses capacitive coupling through an SiO2 insulation barrier to transmit digital signals across the isolation boundary. Each channel consists of a logic input buffer, a high-voltage capacitive coupling element, and a logic output buffer. The input signal modulates a carrier that passes through the isolation capacitor and is demodulated on the output side. The reverse channel operates identically in the opposite direction. The SiO2 barrier provides galvanic isolation while maintaining signal integrity with low propagation delay (9ns typical) and low skew (300ps typical). Common-mode transients are rejected by the differential capacitive coupling structure.

Pin Name Type Function
1 VCC1 Power Side 1 supply (3.3V or 5V)
2 OUT1 Output Forward channel output (Side 2)
3 IN1 Input Forward channel input (Side 1)
4 GND1 Power Side 1 ground
5 GND2 Power Side 2 ground
6 IN2 Input Reverse channel input (Side 2)
7 OUT2 Output Reverse channel output (Side 1)
8 VCC2 Power Side 2 supply (3.3V or 5V)
  • RS-485/RS-232 communication isolation barrier
  • SPI and I2C bus isolation in industrial systems
  • Motor drive gate driver signal isolation
  • Medical equipment patient-side isolation
  • Isolated power supply feedback loops
Manufacturer Part Number Package Notes
TI ISO6421DR 8-SOIC 150Mbps upgrade, pin-compatible
TI ISO7420DR 8-SOIC 2 forward channels variant
ADI ADuM1201ARZ 8-SOIC Dual 1/1, 25Mbps, compatible
Silicon Labs Si8621BC-B-IS 8-SOIC Dual 1/1, 150Mbps, compatible
Recommend Parts

TPS65217CRSLR

PMIC for AM335x, 3 bucks, 2 LDOs, battery charger, WLED, I2C, VQFN-48

Brand:

Package:

VQFN-48 (6×6 mm, 0.4 mm pitch)
In stock:
8909pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC273NSR

Octal D-type flip-flop, edge-triggered, async clear, 28MHz, SOP-20

Brand:

Package:

SOP-20 (NS) (12.6×7.8 mm)
In stock:
8359pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC138N

3-to-8 decoder/demux, active-low outputs, 3 enable inputs, 15ns, PDIP-16

Brand:

Package:

PDIP-16 (24.33×9.4 mm, Through-Hole)
In stock:
11952pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

TPA0211DGNR

2W mono Class-AB audio amp, BTL speaker + SE headphone, 2.5-5.5V, HVSSOP-8

Brand:

Package:

HVSSOP-8 (DGN) (3.0×4.9 mm, PowerPAD)
In stock:
3337pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

DP83848CVVX/NOPB

10/100 Ethernet PHY, MII/RMII/SNI, Auto-MDIX, 270mW, LQFP-48, commercial

Brand:

Package:

LQFP-48 (7×7 mm)
In stock:
14754pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC245PWR

Octal bus transceiver, 3-state outputs, 2-6V, 12ns tpd, TSSOP-20

Brand:

Package:

TSSOP-20 (6.5×6.4 mm)
In stock:
2638pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry
Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Company
insights
Industries
All Products
Integrated Circuits
C&I Devices
Discrete
Memory Chips
MPUs & MCUs