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ISO7421EDR

General Purpose Digital Isolator 2500Vrms 2 Channel 50Mbps 25kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)

Manufacturer:

TI
Mfr.Part #:

ISO7421EDR
Datasheet:

ISO7421EDR Datasheet (PDF)
Rating:

Catalog
Integrated isolated power:

No
Isolation rating:

Basic
Number of channels:

2
EDA/CAD Models:

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ISO7421EDR General Description

ISO742x provide galvanic isolation up to 2500 V_RMS for 1 minute per UL and 4242 V_PK per VDE. These devices have two isolated channels. Each 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. ISO7420 has both channels in the same direction while ISO7421 has the two channels in opposite direction. In case of input power or signal loss, default output is 'low' for devices with suffix 'F' and 'high' for devices without suffix 'F'. ISO742x have no integrated noise filter and thus have fast propagation delays.

These devices have TTL input thresholds and operate from 3-V to 5.5-V supplies. All inputs are 5-V tolerant when supplied from a 3.3-V supply.

Key Features

Signaling Rate > 50 Mbps
Default Output 'High' and 'Low' Options
Low Power Consumption: Typical I_CC per Channel (3.3-V Supplies):
- ISO7420: 1.4 mA at 1 Mbps, 2.5 mA at 25 Mbps
- ISO7421: 1.8 mA at 1 Mbps, 2.8 mA at 25 Mbps
Low Propagation Delay: 7 ns Typical
Low Pulse Skew: 200 ps Typical
Wide T_A Range Specified: –40°C to 125°C
50-KV/μs Transient Immunity, Typical
Isolation Barrier Life: > 25 Years
Operates from 3-V to 5.5-V Supply Levels
3.3-V and 5-V Level Translation
Narrow Body SOIC-8 Package
Safety and Regulatory Approvals:
- 4242 V_PK Isolation per DIN V VDE V 0884-10 and DIN EN 61010-1
- 2500 V_RMS Isolation for 1 minute per UL 1577
- CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 Standards
- CQC Certification per GB4943.1-2011

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Specifications

Rating	Catalog	Integrated isolated power	No
Isolation rating	Basic	Number of channels	2
Forward/reverse channels	1 forward / 1 reverse	Default output	High
Data rate (max) (MBps)	50	Surge isolation voltage (VIOSM) (VPK)	4000
Transient isolation voltage (VIOTM) (VPK)	4242	Withstand isolation voltage (VISO) (Vrms)	2500
CMTI (min) (V/µs)	25000	Operating temperature range (°C)	-40 to 125
Supply voltage (max) (V)	5	Supply voltage (min) (V)	3.3
Propagation delay time (typ) (µs)	0.007	Current consumption per channel (DC) (typ) (mA)	1.8
Current consumption per channel (1 Mbps) (typ) (mA)	1.8	Creepage (min) (mm)	4
Clearance (min) (mm)	4