74FST3253DR2 Equivalent & Substitute Parts

Part Overview

The 74FST3253DR2 is a multiplexer/demultiplexer logic IC with 2 x 4:1 circuit configuration in a 16-SOIC surface mount package. Manufactured by onsemi, this component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74FST3253DR2 operates with single supply voltage between 4V and 5.5V across an operating temperature range of -40°C to 85°C.

Substiute Parts

74FST3253DR2

onsemiIn Stock: 86774FST3253DR2 Datasheet

Current PartRFQ

SN74CBT3253D

Texas InstrumentsIn Stock: 2649SN74CBT3253D Datasheet

DirectRFQ

SN74CBT3253DR

Texas InstrumentsIn Stock: 8661SN74CBT3253DR Datasheet

DirectRFQ

CBT3253AD,118

Nexperia USA Inc.In Stock: 830CBT3253AD,118 Datasheet

SimilarRFQ

SN74CBT3253CD

Texas InstrumentsIn Stock: 1423SN74CBT3253CD Datasheet

SimilarRFQ

SN74CBT3253CDR

Texas InstrumentsIn Stock: 3461SN74CBT3253CDR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74FST3253DR2 is determined by the following critical parameters:

• Circuit Configuration: 2 x 4:1 multiplexer/demultiplexer topology
• Package Type: 16-SOIC surface mount package with 0.154" (3.90mm) width
• Voltage Supply Range: Single supply operation between 4V and 5.5V
• Operating Temperature Range: -40°C to 85°C
• Independent Circuits: 1 circuit per device
• Mounting Type: Surface mount technology

All substitute parts listed maintain these core electrical and mechanical specifications. Substitute parts are categorized as direct replacements (functionally and electrically equivalent) or similar alternatives (compatible with minor packaging or compliance variations).

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement Priority: SN74CBT3253CDR (Texas Instruments) and SN74CBT3253CD (Texas Instruments) are recommended as primary substitutes. Both parts maintain identical circuit configuration, package specifications, and operating parameters. SN74CBT3253CDR is available in Tape & Reel packaging with 3,393 units in stock, while SN74CBT3253CD is available in Tube packaging with 1,368 units in stock.

Alternative Options: SN74CBT3253D (Texas Instruments, Last Time Buy status, 2,567 units) and SN74CBT3253DR (Texas Instruments, Last Time Buy status, 8,554 units) provide equivalent functionality with identical electrical specifications.

Active Production Alternative: CBT3253AD,118 (Nexperia USA Inc.) is the only active product status substitute available. This part maintains all critical electrical and mechanical parameters and is ROHS3 compliant with 790 units in stock.

Compliance Consideration: All substitute parts are ROHS3 compliant, whereas the 74FST3253DR2 is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulations.

Voltage Supply Specification: Substitute parts specify a minimum supply voltage of 4.5V compared to the 74FST3253DR2 minimum of 4V. Applications operating below 4.5V require verification of compatibility.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT3253DR directly replace 74FST3253DR2 in existing designs?

A: Yes. Both parts share identical circuit configuration (2 x 4:1), package type (16-SOIC), mounting method (surface mount), operating temperature range (-40°C to 85°C), and moisture sensitivity level (1). The primary difference is the minimum supply voltage specification: SN74CBT3253DR requires 4.5V minimum versus 4V for the 74FST3253DR2. Designs operating at or above 4.5V supply voltage are fully compatible.

Q: What is the difference between SN74CBT3253D and SN74CBT3253DR?

A: Both parts are electrically and mechanically identical. The difference is packaging format: SN74CBT3253D is supplied in Tube packaging, while SN74CBT3253DR is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and inventory management preferences.

Q: Why is CBT3253AD,118 listed as a similar substitute rather than a direct substitute?

A: CBT3253AD,118 maintains all critical electrical specifications and package dimensions. The designation reflects that it is manufactured by Nexperia USA Inc. rather than Texas Instruments, and carries an active product status compared to the Last Time Buy status of other Texas Instruments alternatives.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. The original 74FST3253DR2 is RoHS non-compliant. This is a significant consideration for applications subject to RoHS regulations or customer requirements.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in two packaging formats: Tube (SN74CBT3253D, SN74CBT3253CD) and Tape & Reel (SN74CBT3253DR, SN74CBT3253CDR, CBT3253AD,118). Selection depends on assembly equipment compatibility and production volume requirements.

Q: Is there a minimum supply voltage difference I should be aware of?

A: Yes. The 74FST3253DR2 operates at 4V minimum supply voltage, while all substitute parts require 4.5V minimum. Designs operating between 4V and 4.5V are not compatible with the listed substitutes and require alternative solutions.