LF298MX Sample and Hold Amplifier IC Equivalent & Substitute Parts

Part Overview

The LF298MX is a Sample and Hold Amplifier integrated circuit manufactured by Texas Instruments, designed for precision analog signal acquisition and storage applications. This device features a single sample-and-hold circuit in a 14-SOIC surface mount package and operates across a wide supply voltage range of 10V to 36V.

The LF298MX is classified as an obsolete product. Locating equivalent and substitute parts is necessary to support ongoing production requirements, maintenance operations, and system redesigns where component availability is constrained. The substitute part LF298MX/NOPB maintains identical electrical and mechanical specifications while offering active product status and improved inventory availability.

Substiute Parts

LF298MX

Texas InstrumentsIn Stock: 3130LF298MX Datasheet

Current PartRFQ

LF298MX/NOPB

Texas InstrumentsIn Stock: 10341LF298MX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LF298MX with equivalent parts is determined by strict alignment of the following critical parameters:

Electrical Specifications:

• Amplifier Type: Sample and Hold
• Number of Circuits: 1
• Current - Input Bias: 5 nA
• Voltage - Input Offset: 1 mV
• Current - Supply: 4.5 mA
• Voltage - Supply Span: 10V to 36V
• Operating Temperature Range: -25°C to 85°C

Mechanical and Packaging Specifications:

• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Supplier Device Package: 14-SOIC

Compliance and Regulatory:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

The substitute part LF298MX/NOPB is grouped as a direct equivalent because it maintains identical electrical performance, mechanical compatibility, and regulatory compliance. The primary distinction is packaging format (Tape & Reel versus standard packaging) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LF298MX/NOPB

The LF298MX/NOPB is the direct functional and mechanical equivalent of the LF298MX. Selection of this substitute part is based on the following engineering criteria:

1. Electrical Equivalence: All electrical parameters are identical, including input bias current, input offset voltage, supply current, and operating voltage range. The device maintains the same sample-and-hold amplifier functionality across the specified temperature range.

2. Mechanical Compatibility: Both parts utilize the identical 14-SOIC package with 0.154" width (3.90mm). Pin configuration and footprint are fully compatible, enabling direct substitution on existing printed circuit board designs without layout modifications.

3. Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements for current manufacturing standards.

4. Product Status Advantage: The LF298MX/NOPB carries Active product status, indicating ongoing manufacturer support, continued availability, and compliance with current quality and reliability standards. The original LF298MX is classified as Obsolete, making the LF298MX/NOPB the preferred selection for new designs and ongoing production.

5. Packaging Format Consideration: The LF298MX/NOPB is supplied in Tape & Reel (TR) format, which is standard for automated assembly operations. This packaging format is compatible with standard pick-and-place equipment used in modern manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can LF298MX/NOPB be used as a direct replacement for LF298MX in existing designs?

A: Yes. The LF298MX/NOPB is a direct functional and mechanical equivalent. All electrical specifications, operating parameters, and package dimensions are identical. The device can be substituted without circuit modifications or board redesign.

Q: What is the difference between LF298MX and LF298MX/NOPB?

A: The primary differences are product status and packaging format. The LF298MX is classified as Obsolete, while LF298MX/NOPB is Active. The LF298MX/NOPB is supplied in Tape & Reel (TR) format, which is standard for automated assembly. All electrical and mechanical specifications are identical.

Q: Why is the LF298MX classified as Obsolete?

A: The LF298MX has reached end-of-life status with the manufacturer. The LF298MX/NOPB represents the current active product offering with identical specifications and improved availability.

Q: Are there any compatibility concerns when switching from LF298MX to LF298MX/NOPB?

A: No compatibility concerns exist. Both parts share the same 14-SOIC package footprint, pin configuration, electrical specifications, and operating characteristics. The substitution is transparent to circuit design and board layout.

Q: What does the "/NOPB" designation indicate?

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, confirming compliance with RoHS3 regulations. This is standard for current production components.

Q: Is the LF298MX/NOPB suitable for high-volume production?

A: Yes. The LF298MX/NOPB is supplied in Tape & Reel format, which is optimized for automated assembly operations and high-volume manufacturing. Current inventory availability is 10,300 pieces.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: Both the LF298MX and LF298MX/NOPB have MSL 1 (Unlimited), indicating no moisture sensitivity constraints. Standard handling and storage procedures are sufficient.