FST16233MTDX Equivalent & Substitute Parts

Part Overview

The FST16233MTDX is a Multiplexer/Demultiplexer logic integrated circuit manufactured by onsemi, configured as 8 x 1:2 in a 56-TSSOP surface mount package. The device operates on single supply voltage between 4V and 5.5V with an operating temperature range of -40°C to 85°C. This part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

FST16233MTDX

onsemiIn Stock: 5379FST16233MTDX Datasheet

Current PartRFQ

SN74CBT16233DGGR

Texas InstrumentsIn Stock: 2313SN74CBT16233DGGR Datasheet

DirectRFQ

SN74CBT16233DGG

Texas InstrumentsIn Stock: 807SN74CBT16233DGG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FST16233MTDX is determined by the following critical parameters:

Mechanical Compatibility: Package type (56-TFSOP), mounting type (Surface Mount), and physical dimensions (0.240", 6.10mm Width) must match exactly to ensure PCB layout compatibility without redesign.

Electrical Compatibility: Voltage supply range, operating temperature range, and circuit functionality (Multiplexer/Demultiplexer logic) must support the application requirements. The FST16233MTDX operates on single supply voltage between 4V and 5.5V.

Functional Compatibility: The substitute must perform the multiplexer/demultiplexer function with compatible circuit configuration and independent circuit count.

Compliance Requirements: RoHS3 compliance and REACH unaffected status must be maintained for regulatory adherence.

The identified substitute parts from Texas Instruments (SN74CBT16233DGGR and SN74CBT16233DGG) meet these substitution criteria through matching package specifications, compatible voltage supply ranges, identical operating temperature range, and equivalent functional classification.

Parameter Comparison

Engineering Selection Recommendations

SN74CBT16233DGGR is the primary substitute option. This part is manufactured by Texas Instruments with active product status, ensuring long-term availability and supply chain stability. It carries ROHS3 compliance and REACH unaffected status, maintaining regulatory requirements. The tape and reel packaging format supports production volume requirements. The MSL rating of 1 (Unlimited) provides superior moisture handling compared to the original part.

SN74CBT16233DGG serves as a secondary substitute option. Also manufactured by Texas Instruments with active product status, this part meets identical electrical and mechanical specifications. The MSL rating of 1 (Unlimited) matches the primary substitute. This variant is suitable for prototype and low-volume applications.

Both substitute parts operate within compatible voltage supply ranges (4.75V ~ 5.25V) that overlap with the original specification (4V ~ 5.5V). The identical operating temperature range (-40°C ~ 85°C) ensures thermal compatibility. The 56-TFSOP package and surface mount configuration provide direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT16233DGGR directly replace FST16233MTDX without PCB modifications?

A: Yes. Both parts use the 56-TFSOP package with identical physical dimensions (0.240", 6.10mm Width) and surface mount configuration. Pin-to-pin compatibility and footprint alignment are maintained, allowing direct substitution without PCB redesign.

Q: What is the difference between the 8 x 1:2 circuit configuration of FST16233MTDX and the 16 x 1:2 configuration of the substitute parts?

A: The substitute parts provide expanded circuit capacity (16 x 1:2 versus 8 x 1:2). This increased functionality is compatible with applications designed for the original part, as the substitute can accommodate the original circuit requirements while offering additional capacity for future expansion.

Q: Are the voltage supply ranges compatible between FST16233MTDX and the substitute parts?

A: The original part operates at 4V ~ 5.5V, while substitute parts operate at 4.75V ~ 5.25V. The substitute range is narrower but fully contained within typical 5V supply specifications. Applications using standard 5V supply voltage are compatible with both parts.

Q: What is the significance of the MSL rating difference?

A: The original FST16233MTDX carries MSL 2 (1 Year), while substitute parts carry MSL 1 (Unlimited). MSL 1 indicates superior moisture resistance and longer shelf life without baking requirements, providing manufacturing and storage advantages.

Q: Which substitute part should be selected for production applications?

A: SN74CBT16233DGGR is recommended for production use due to tape and reel packaging format, which supports automated assembly processes and volume production requirements.

Q: Are both substitute parts ROHS3 compliant?

A: Yes. Both SN74CBT16233DGGR and SN74CBT16233DGG are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance requirements.