LNLASB3157DFT2G Equivalent & Substitute Parts

Part Overview

The LNLASB3157DFT2G is a single-circuit SPDT (Single Pole Double Throw) IC switch manufactured by onsemi, designed for 2:1 multiplexing applications in SC-88/SC70-6/SOT-363 packaging. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. The part operates across a supply voltage range of 1.65V to 5.5V with a maximum on-state resistance of 7Ohm and supports high-frequency switching applications up to 250MHz bandwidth.

Substiute Parts

LNLASB3157DFT2G

onsemiIn Stock: 858LNLASB3157DFT2G Datasheet

Current PartRFQ

PI5A4599BCEX

Diodes IncorporatedIn Stock: 6946PI5A4599BCEX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LNLASB3157DFT2G is determined by the following critical parameters:

Primary Substitution Criteria:

• Switch circuit type: SPDT (Single Pole Double Throw)
• Multiplexer configuration: 2:1
• Number of circuits: 1
• Package compatibility: 6-TSSOP, SC-88, SOT-363
• Mounting type: Surface Mount

Secondary Compatibility Parameters:

• Supply voltage range must encompass or overlap with 1.65V ~ 5.5V
• On-state resistance (Ron) must not exceed application requirements
• Channel-to-channel matching (ΔRon) of 150mOhm or better
• Operating temperature range must support -55°C ~ 125°C or be suitable for the intended application environment

The PI5A4599BCEX from Diodes Incorporated meets the primary substitution criteria as a 1-circuit SPDT 2:1 switch in SOT-363-6 (SC-70) packaging. While the on-state resistance is higher at 11Ohm (compared to 7Ohm) and the operating temperature range is narrower (-40°C ~ 85°C), the part maintains functional equivalence for applications within these parameter boundaries.

Parameter Comparison

Engineering Selection Recommendations

Product Status Considerations:

The LNLASB3157DFT2G is classified as obsolete, necessitating transition to an active alternative. The PI5A4599BCEX is classified as Last Time Buy, indicating limited future availability but current production status.

Compliance and Certifications:

Both parts maintain REACH Unaffected status and carry EAR99 ECCN classification. The PI5A4599BCEX includes RoHS3 compliance certification, providing additional regulatory alignment for new designs.

Selection Basis:

Component selection between these parts must be based on specific application requirements regarding on-state resistance, switching speed, and operating temperature range. The LNLASB3157DFT2G offers superior switching performance (5.2ns/4.6ns) and lower on-state resistance (7Ohm), while the PI5A4599BCEX provides higher bandwidth (350MHz) and lower charge injection (5pC). Temperature range requirements must be evaluated against the narrower operating window of the PI5A4599BCEX (-40°C ~ 85°C versus -55°C ~ 125°C).

Frequently Asked Questions (FAQ)

Q: Can the PI5A4599BCEX directly replace the LNLASB3157DFT2G in all applications?

A: Direct replacement is possible only when application requirements accommodate the PI5A4599BCEX parameter specifications. The higher on-state resistance (11Ohm vs. 7Ohm), slower switching times (15ns/7ns vs. 5.2ns/4.6ns), and narrower operating temperature range (-40°C ~ 85°C vs. -55°C ~ 125°C) must be evaluated against circuit design margins and environmental specifications.

Q: Are the packages physically compatible?

A: Both parts use 6-TSSOP, SC-88, SOT-363 packaging with Surface Mount mounting type. The PI5A4599BCEX is supplied in SOT-363-6 (SC-70) configuration, which is mechanically and electrically compatible with the original part's package footprint.

Q: What are the key differences in electrical performance?

A: The LNLASB3157DFT2G provides faster switching (5.2ns/4.6ns vs. 15ns/7ns) and lower on-state resistance (7Ohm vs. 11Ohm). The PI5A4599BCEX offers higher bandwidth (350MHz vs. 250MHz), lower charge injection (5pC vs. 7pC), and better crosstalk performance (-82dB vs. -54dB). Supply voltage ranges overlap substantially (1.65V-5.5V vs. 1.6V-6V).

Q: How do leakage current specifications compare?

A: The LNLASB3157DFT2G specifies maximum leakage current of 50nA, while the PI5A4599BCEX specifies 100nA. Applications with strict leakage requirements must account for this difference.

Q: What is the significance of the Last Time Buy status for PI5A4599BCEX?

A: Last Time Buy status indicates the manufacturer has announced end-of-life for this part. Existing inventory may be available, but future procurement will not be possible. Long-term designs should evaluate additional alternatives or secure adequate stock during the Last Time Buy window.