LM12458CIVX Equivalent & Substitute Parts

Part Overview

The LM12458CIVX is a Data Acquisition System (DAS) integrated circuit manufactured by Texas Instruments, featuring 12-bit resolution with a 140 kHz sampling rate and 8-channel parallel data interface. The device operates across a 3V to 5.5V supply range and is housed in a 44-PLCC surface mount package.

This part is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing system support, design updates, and procurement continuity. Substitute parts maintain functional equivalence while offering improved availability and compliance status.

Substiute Parts

LM12458CIVX

Texas InstrumentsIn Stock: 9056LM12458CIVX Datasheet

Current PartRFQ

LM12458CIVX/NOPB

Texas InstrumentsIn Stock: 2616LM12458CIVX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM12458CIVX is determined by strict equivalence across the following critical parameters:

• Channel Configuration: 8 channels (fixed requirement)
• Resolution: 12-bit (fixed requirement)
• Sampling Rate: 140 kHz (fixed requirement)
• Data Interface: Parallel (fixed requirement)
• Package: 44-PLCC (J-Lead) surface mount (fixed requirement)
• Supply Voltage Range: 3V to 5.5V (fixed requirement)
• Operating Temperature: -40°C to 85°C (fixed requirement)

The LM12458CIVX/NOPB qualifies as a direct substitute, maintaining identical electrical specifications and package configuration while offering improved compliance status and availability.

Parameter Comparison

Engineering Selection Recommendations

The LM12458CIVX/NOPB is the direct functional equivalent of the LM12458CIVX. Selection between these parts should be based on the following factors:

Product Status: The original LM12458CIVX is classified as Obsolete. The LM12458CIVX/NOPB carries Last Time Buy status, indicating limited future availability. For new designs or long-term production requirements, procurement planning should prioritize the LM12458CIVX/NOPB while supplies remain available.

Compliance Requirements: The LM12458CIVX/NOPB meets ROHS3 compliance standards, whereas the original part is RoHS non-compliant. Systems subject to RoHS regulatory requirements must use the LM12458CIVX/NOPB variant.

Moisture Sensitivity: The LM12458CIVX/NOPB carries an MSL rating of 3 (168 hours), compared to the original part's MSL 2A (4 weeks). This affects storage and handling protocols but does not impact electrical performance.

Packaging Availability: The LM12458CIVX/NOPB is available in Cut Tape and Digi-Reel® formats, providing flexibility for both prototype and production-volume procurement.

Frequently Asked Questions (FAQ)

Q: Can the LM12458CIVX/NOPB be used as a direct replacement for the LM12458CIVX?

A: Yes. The LM12458CIVX/NOPB maintains identical electrical specifications, channel count, resolution, sampling rate, data interface, supply voltage range, operating temperature range, and package configuration. No circuit modifications are required for substitution.

Q: What is the difference between LM12458CIVX and LM12458CIVX/NOPB?

A: Both parts are functionally equivalent. The primary differences are product status (Obsolete vs. Last Time Buy), RoHS compliance (non-compliant vs. ROHS3 compliant), MSL rating (2A vs. 3), and packaging options (standard vs. Cut Tape/Digi-Reel®).

Q: Why is the original LM12458CIVX marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The LM12458CIVX/NOPB variant remains available as Last Time Buy, providing a limited window for procurement before complete discontinuation.

Q: Are there any pin-compatibility concerns when substituting these parts?

A: No. Both parts use the identical 44-PLCC (J-Lead) package with the same pinout. PCB layout and socket compatibility are maintained.

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

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free), signifying RoHS3 compliance and the absence of lead in the component composition.

Q: How do the MSL ratings affect component handling?

A: MSL 2A (4 weeks) requires storage in controlled humidity conditions with a 4-week shelf life after opening. MSL 3 (168 hours) allows 7 days of exposure to ambient conditions. The LM12458CIVX/NOPB's higher MSL rating provides more flexible handling protocols.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the design does not have specific RoHS compliance exemptions that would prevent use of the LM12458CIVX/NOPB. For new designs, the LM12458CIVX/NOPB is the recommended choice due to improved compliance status and availability.