NLAS325US Equivalent & Substitute Parts

Part Overview

The NLAS325US is a 2-circuit IC switch with SPST (Single Pole Single Throw) NO/NC configuration manufactured by onsemi. This component operates as a 1:1 multiplexer/demultiplexer with 25Ohm on-state resistance, designed for high-speed switching applications up to 175MHz bandwidth. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	NLAS325US
Manufacturer	onsemi
Category	Interface
Switch Circuit Type	SPST - NO/NC
Number of Circuits	2
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	25Ohm
Supply Voltage Range	2V ~ 5.5V (Single Supply)
Switch Time (Ton/Toff Max)	14ns / 5ns
-3dB Bandwidth	175MHz
Charge Injection	3pC
Channel Capacitance (CS(off)/CD(off))	10pF / 10pF
Leakage Current (IS(off) Max)	200nA
Crosstalk	-90dB @ 100kHz
Operating Temperature Range	-55°C ~ 125°C (TA)
Package / Case	8-VFSOP (0.091", 2.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the NLAS325US is determined by strict equivalence across the following critical parameters:

Switch circuit configuration: SPST - NO/NC
Circuit count: 2 circuits
Multiplexer ratio: 1:1
On-state resistance: 25Ohm maximum
Supply voltage range: 2V ~ 5.5V
Switch timing: 14ns (Ton) / 5ns (Toff) maximum
Bandwidth: 175MHz (-3dB)
Charge injection: 3pC
Channel capacitance: 10pF (CS(off)) / 10pF (CD(off))
Leakage current: 200nA maximum
Crosstalk: -90dB @ 100kHz
Operating temperature: -55°C ~ 125°C
Package: 8-VFSOP surface mount

The NLAS325USG meets all electrical and mechanical parameters required for direct substitution. The primary difference is packaging format (Cut Tape vs. standard packaging) and RoHS compliance status.

Parameter Comparison

Parameter	NLAS325US	NLAS325USG	Match
Manufacturer	onsemi	onsemi	Yes
Switch Circuit	SPST - NO/NC	SPST - NO/NC	Yes
Number of Circuits	2	2	Yes
Multiplexer Configuration	1:1	1:1	Yes
On-State Resistance (Max)	25Ohm	25Ohm	Yes
Supply Voltage	2V ~ 5.5V	2V ~ 5.5V	Yes
Switch Time (Ton/Toff Max)	14ns / 5ns	14ns / 5ns	Yes
-3dB Bandwidth	175MHz	175MHz	Yes
Charge Injection	3pC	3pC	Yes
Channel Capacitance (CS(off)/CD(off))	10pF / 10pF	10pF / 10pF	Yes
Leakage Current (IS(off) Max)	200nA	200nA	Yes
Crosstalk	-90dB @ 100kHz	-90dB @ 100kHz	Yes
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	Yes
Package / Case	8-VFSOP (0.091", 2.30mm Width)	8-VFSOP (0.091", 2.30mm Width)	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Packaging Format	Standard	Cut Tape (CT)	Functionally Equivalent
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Compliance Difference
Product Status	Obsolete	Obsolete	Yes

Engineering Selection Recommendations

The NLAS325USG provides complete electrical and mechanical equivalence to the NLAS325US across all specified parameters. Both parts are classified as obsolete products from onsemi.

The NLAS325USG offers improved regulatory compliance status, meeting ROHS3 requirements compared to the non-compliant status of the NLAS325US. This distinction is relevant for applications subject to RoHS directives or procurement policies requiring compliant components.

Packaging format differs between the two parts: NLAS325US is supplied in standard packaging, while NLAS325USG is supplied in Cut Tape format. This distinction affects procurement and assembly processes but does not impact electrical performance or functional compatibility.

Both parts maintain identical electrical characteristics, including on-state resistance, switching speed, bandwidth, and operating temperature range, confirming direct substitution capability at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can NLAS325USG replace NLAS325US in existing designs?

A: Yes. The NLAS325USG is electrically and mechanically equivalent across all specified parameters. Both parts feature identical switch circuit configuration (SPST - NO/NC), 2-circuit count, 1:1 multiplexer ratio, 25Ohm on-state resistance, 2V ~ 5.5V supply voltage, switching times, bandwidth, and operating temperature range. The 8-VFSOP package dimensions are identical.

Q: What is the difference between NLAS325US and NLAS325USG?

A: The primary differences are packaging format and RoHS compliance status. NLAS325US is supplied in standard packaging and is RoHS non-compliant. NLAS325USG is supplied in Cut Tape format and meets ROHS3 compliance requirements. All electrical and mechanical specifications are identical.

Q: Does packaging format affect circuit performance?

A: No. Packaging format (standard vs. Cut Tape) is a procurement and assembly consideration only. It does not affect electrical performance, switching characteristics, or functional compatibility in the circuit.

Q: Are both parts still available for procurement?

A: Both NLAS325US and NLAS325USG are classified as obsolete products. Inventory availability varies by supplier. NLAS325USG currently shows higher inventory levels (3400 Pcs) compared to NLAS325US (1400 Pcs).

Q: What applications are these parts suitable for?

A: These 2-circuit SPST switches are designed for high-speed signal routing and multiplexing applications operating up to 175MHz bandwidth. The 25Ohm on-state resistance and low charge injection (3pC) make them suitable for precision analog and RF signal switching applications requiring minimal signal distortion.

Q: Can these parts be used in new designs?

A: Both parts are classified as obsolete. Design decisions involving obsolete components require evaluation of long-term availability, supply chain risk, and compliance requirements. The NLAS325USG offers improved RoHS compliance status compared to NLAS325US.

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