ISO124U/1KG4 Equivalent & Substitute Parts

Part Overview

The ISO124U/1KG4 is a single-channel isolation amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This component provides galvanic isolation for analog signal conditioning applications, featuring a 50 kHz bandwidth and 2 V/µs slew rate. The ISO124U/1KG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

ISO124U/1KG4

Texas InstrumentsIn Stock: 8452ISO124U/1KG4 Datasheet

Current PartRFQ

ISO124U/1K

Texas InstrumentsIn Stock: 7521ISO124U/1K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISO124U/1KG4 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Amplifier Type: Isolation (single-channel configuration)
• Slew Rate: 2 V/µs
• -3dB Bandwidth: 50 kHz
• Voltage - Input Offset: 20 mV
• Current - Supply: 5 mA
• Current - Output / Channel: 15 mA
• Voltage - Supply Span: 9 V to 36 V
• Operating Temperature Range: -25°C to 85°C

Mechanical Equivalence Criteria:

• Package / Case: 8-SOIC (0.295", 7.50 mm Width)
• Mounting Type: Surface Mount
• Number of Leads: 8

Compliance Equivalence Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

The ISO124U/1K meets all electrical, mechanical, and compliance requirements for direct substitution. This part maintains identical functional specifications while offering active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The ISO124U/1K is the direct functional equivalent of the ISO124U/1KG4 and is suitable for substitution in all applications where the discontinued part was specified. Both parts are manufactured by Texas Instruments and share identical electrical performance characteristics, mechanical packaging, and compliance certifications.

Selection Basis:

The ISO124U/1K offers the following advantages over the main part:

• Active product status ensures long-term availability and supply chain continuity
• Identical ROHS3 compliance and MSL rating (3, 168 Hours) maintain regulatory and manufacturing process compatibility
• Packaging format (8-SOIC, 0.295" width) and surface mount configuration enable direct PCB layout compatibility without redesign

Both parts are qualified for the same operating temperature range (-25°C to 85°C) and supply voltage envelope (9 V to 36 V), supporting equivalent system performance in isolation amplifier applications.

Frequently Asked Questions (FAQ)

Q: Can the ISO124U/1K be used as a direct replacement for the ISO124U/1KG4 without PCB modifications?

A: Yes. Both parts are housed in identical 8-SOIC packages with 0.295" width and 8 leads. Pin configuration, spacing, and surface mount footprint are equivalent, enabling direct substitution without PCB layout changes.

Q: Are the electrical performance specifications identical between these parts?

A: Yes. The ISO124U/1K and ISO124U/1KG4 share identical specifications for slew rate (2 V/µs), bandwidth (50 kHz), input offset voltage (20 mV), supply current (5 mA), output current (15 mA), and operating temperature range (-25°C to 85°C).

Q: What is the primary difference between these two part numbers?

A: The ISO124U/1KG4 is discontinued at DiGi Electronics, while the ISO124U/1K maintains active product status. The packaging designation differs (G4 versus standard), but electrical and mechanical specifications remain identical.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the ISO124U/1KG4 and ISO124U/1K are ROHS3 compliant with an MSL rating of 3 (168 Hours), meeting equivalent environmental and regulatory requirements.

Q: What supply voltage range is supported by the ISO124U/1K?

A: The ISO124U/1K operates across a supply voltage span of 9 V to 36 V, identical to the ISO124U/1KG4, supporting equivalent system power supply configurations.

Q: Is the ISO124U/1K available in cut tape and reel packaging?

A: Yes. The ISO124U/1K is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production volume requirements.