LM12458CIV Equivalent & Substitute Parts

Part Overview

The LM12458CIV is a Data Acquisition System (DAS) integrated circuit manufactured by Texas Instruments, featuring 12-bit resolution with an 8-channel parallel interface and 140k samples per second sampling rate. The device operates across a 3V to 5.5V supply range and is housed in a 44-PLCC package suitable for surface mount applications.

The LM12458CIV is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement planning. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement capability.

Substiute Parts

LM12458CIV

Texas InstrumentsIn Stock: 3641LM12458CIV Datasheet

Current PartRFQ

LM12458CIV/NOPB

Texas InstrumentsIn Stock: 1349LM12458CIV/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM12458CIV is determined by strict equivalence across the following critical parameters:

• Channel Configuration: 8 channels (fixed requirement)
• Resolution: 12-bit (fixed requirement)
• Sampling Rate: 140k samples per second (fixed requirement)
• Data Interface: Parallel (fixed requirement)
• Package: 44-PLCC with J-Lead configuration (fixed requirement)
• Voltage Supply: 3V to 5.5V range (fixed requirement)
• Operating Temperature: -40°C to 85°C (fixed requirement)

The LM12458CIV/NOPB variant qualifies as a direct substitute because it maintains identical electrical performance and mechanical specifications across all parameters. Differences in product status, RoHS compliance, and packaging format do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The LM12458CIV/NOPB is a direct functional equivalent to the LM12458CIV. Both parts deliver identical electrical performance and occupy the same physical footprint, enabling pin-for-pin replacement without circuit modification.

Product Status Consideration: The LM12458CIV is classified as obsolete, while the LM12458CIV/NOPB carries Last Time Buy status. For new designs or system refreshes, the LM12458CIV/NOPB represents the final procurement opportunity from the manufacturer before complete discontinuation.

Compliance Difference: The LM12458CIV/NOPB achieves ROHS3 compliance, whereas the original LM12458CIV does not. This distinction is relevant for applications subject to RoHS regulatory requirements or customer specifications mandating lead-free components.

Moisture Sensitivity: The LM12458CIV/NOPB specifies MSL 3 (168 hours), compared to MSL 2A (4 weeks) for the original part. This indicates different moisture absorption characteristics and storage requirements; handling procedures must align with the specific part's MSL rating.

Frequently Asked Questions (FAQ)

Q: Can the LM12458CIV/NOPB replace the LM12458CIV in existing designs?

A: Yes. The LM12458CIV/NOPB is electrically and mechanically identical to the LM12458CIV. No circuit modifications are required for direct substitution.

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

A: The "/NOPB" designation signifies "No Plumbum" (lead-free) packaging, indicating RoHS3 compliance. The electrical specifications remain unchanged.

Q: Are there differences in handling or storage between these parts?

A: Yes. The LM12458CIV/NOPB has an MSL rating of 3 (168 hours), while the LM12458CIV is rated MSL 2A (4 weeks). Storage and handling procedures must follow the specific MSL requirements of the part being used.

Q: Why is the LM12458CIV marked as obsolete?

A: The LM12458CIV has reached end-of-life status at Texas Instruments. The LM12458CIV/NOPB represents the final available variant and is designated Last Time Buy, indicating limited remaining inventory.

Q: Are both parts suitable for -40°C to 85°C operating environments?

A: Yes. Both the LM12458CIV and LM12458CIV/NOPB are rated for -40°C to 85°C operation and are functionally equivalent across this temperature range.

Q: Can these parts be used interchangeably in high-reliability applications?

A: Functional interchangeability is confirmed. However, compliance requirements (RoHS status) and moisture sensitivity ratings must be evaluated against specific application and regulatory requirements before final selection.