NLAS4684FCT1G Equivalent & Substitute Parts

Part Overview

The NLAS4684FCT1G is a 2-circuit IC switch with 2:1 multiplexer/demultiplexer functionality, featuring 800mOhm on-state resistance and 10-Microbump packaging. Manufactured by onsemi, this component operates across a single supply voltage range of 1.8V to 5.5V with switching times of 30ns maximum. The product is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and procurement planning.

Substiute Parts

NLAS4684FCT1G

onsemiIn Stock: 40483NLAS4684FCT1G Datasheet

Current PartRFQ

NLAS5223MNR2G

onsemiIn Stock: 6581NLAS5223MNR2G Datasheet

MFR RecommendedRFQ

NLAS4684FCTCG

onsemiIn Stock: 1705NLAS4684FCTCG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the NLAS4684FCT1G is determined by the following critical parameters:

Functional Requirements:

• Switch circuit topology: SPDT (Single Pole Double Throw)
• Multiplexer configuration: 2:1
• Number of circuits: 2

Electrical Compatibility Criteria:

• Supply voltage range must encompass or overlap with 1.8V ~ 5.5V
• On-state resistance and switching time characteristics determine signal integrity in the application
• Channel-to-channel matching and crosstalk performance affect signal fidelity

Physical and Environmental Constraints:

• Mounting type: Surface Mount
• Operating temperature range: -55°C ~ 125°C (TA)
• RoHS3 compliance and MSL rating: 1 (Unlimited)

Two substitute parts are identified based on these criteria:

1. NLAS4684FCTCG — Parametric equivalent with identical electrical specifications and 10-Microbump packaging, differentiated by Cut Tape packaging format
2. NLAS5223MNR2G — Manufacturer-recommended substitute with reduced on-state resistance (300mOhm vs. 800mOhm), different package format (10-WQFN), and narrower supply voltage range (1.65V ~ 3.6V)

Parameter Comparison

Engineering Selection Recommendations

NLAS4684FCTCG Selection Criteria:

NLAS4684FCTCG is a parametric equivalent to NLAS4684FCT1G with identical electrical specifications and operating characteristics. The primary distinction is packaging format: NLAS4684FCTCG is supplied in Cut Tape (CT) format, whereas NLAS4684FCT1G uses standard packaging. Both components maintain the same 10-Microbump package geometry, on-state resistance of 800mOhm, supply voltage range of 1.8V ~ 5.5V, and operating temperature range of -55°C ~ 125°C. Both are ROHS3 compliant with MSL rating of 1 (Unlimited). This substitute is appropriate for applications requiring identical electrical performance and pin-compatible packaging.

NLAS5223MNR2G Selection Criteria:

NLAS5223MNR2G is designated as the manufacturer-recommended substitute. This component shares the same SPDT 2:1 multiplexer topology and 2-circuit configuration. However, critical parameter differences exist:

• On-state resistance is reduced to 300mOhm (versus 800mOhm), resulting in lower insertion loss
• Supply voltage range is narrower: 1.65V ~ 3.6V (versus 1.8V ~ 5.5V), limiting applicability to lower-voltage systems
• Operating temperature range is restricted to -40°C ~ 85°C (versus -55°C ~ 125°C), excluding extended temperature applications
• Package format changes from 10-Microbump to 10-WQFN (1.4x1.8), requiring PCB layout modification
• Crosstalk performance is reduced to -70dB @ 100kHz (versus -83dB @ 100kHz)

NLAS5223MNR2G is suitable only for applications operating within 1.65V ~ 3.6V supply range and -40°C ~ 85°C temperature limits, where the reduced on-state resistance provides performance benefit and package change is accommodated in design.

Both substitute parts are obsolete products. All three components are ROHS3 compliant and carry MSL rating of 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q: Can NLAS4684FCTCG directly replace NLAS4684FCT1G without design modification?

A: Yes. NLAS4684FCTCG is a parametric equivalent with identical electrical specifications, operating temperature range (-55°C ~ 125°C), supply voltage range (1.8V ~ 5.5V), on-state resistance (800mOhm), and 10-Microbump package geometry. The only difference is packaging format (Cut Tape). No circuit or PCB layout changes are required.

Q: What are the limitations of NLAS5223MNR2G as a substitute?

A: NLAS5223MNR2G has three significant limitations: (1) Supply voltage range is restricted to 1.65V ~ 3.6V, making it incompatible with applications requiring 5.5V operation; (2) Operating temperature range is limited to -40°C ~ 85°C, excluding extended temperature applications; (3) Package format changes from 10-Microbump to 10-WQFN (1.4x1.8), requiring PCB redesign. Use NLAS5223MNR2G only when all three constraints are acceptable for the application.

Q: How do on-state resistance differences affect circuit performance?

A: NLAS4684FCT1G and NLAS4684FCTCG both specify 800mOhm maximum on-state resistance, while NLAS5223MNR2G specifies 300mOhm. Lower on-state resistance reduces insertion loss and signal attenuation, beneficial for high-frequency or low-level signal applications. However, this parameter difference alone does not determine substitutability; supply voltage and temperature range compatibility are equally critical.

Q: Are all three parts RoHS compliant?

A: Yes. NLAS4684FCT1G, NLAS4684FCTCG, and NLAS5223MNR2G are all ROHS3 compliant with Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: What is the significance of the 10-Microbump versus 10-WQFN package difference?

A: 10-Microbump (UFBGA, FCBGA) and 10-WQFN are distinct package geometries requiring different PCB footprints and assembly processes. NLAS4684FCT1G and NLAS4684FCTCG use 10-Microbump; NLAS5223MNR2G uses 10-WQFN (1.4x1.8). Package change necessitates PCB layout modification and assembly process validation. Pin-to-pin electrical compatibility does not eliminate the requirement for physical redesign.