NLAST4599DFT2GH Equivalent & Substitute Parts

Part Overview

The NLAST4599DFT2GH is a single-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by onsemi, designed for 2:1 multiplexing/demultiplexing applications. This component features a 25Ohm on-state resistance and operates across a 2V to 5.5V supply voltage range, making it suitable for low-voltage signal routing in analog and mixed-signal systems. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Key Parameters

Parameter	Value
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	1
On-State Resistance (Max)	25Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm
Supply Voltage Range	2V ~ 5.5V
Switch Time (Ton/Toff Max)	14ns / 8ns
-3dB Bandwidth	200MHz
Charge Injection	3pC
Channel Capacitance (CS(off)/CD(off))	10pF / 10pF
Leakage Current (IS(off) Max)	1nA
Operating Temperature Range	-55°C ~ 125°C
Package Type	6-TSSOP (SC-88, SOT-363)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the NLAST4599DFT2GH is determined by strict equivalence across the following critical parameters:

Switch topology: SPDT configuration with 2:1 multiplexing capability
Electrical performance: 25Ohm maximum on-state resistance with 2Ohm channel matching tolerance
Operating voltage: 2V to 5.5V single supply operation
Switching characteristics: Maximum switching times of 14ns (Ton) and 8ns (Toff)
Frequency response: 200MHz -3dB bandwidth minimum
Package compatibility: 6-TSSOP (SC-88/SOT-363) surface mount form factor
Environmental compliance: ROHS3 compliance and MSL 1 rating

The NLAST4599DFT2G qualifies as a direct substitute, maintaining identical electrical specifications and package footprint while differing only in packaging format (Tape & Reel versus cut tape) and product status classification.

Parameter Comparison

Parameter	NLAST4599DFT2GH (Main)	NLAST4599DFT2G (Substitute)
Manufacturer	onsemi	onsemi
Switch Circuit	SPDT	SPDT
Multiplexer Configuration	2:1	2:1
Number of Circuits	1	1
On-State Resistance (Max)	25Ohm	25Ohm
Channel-to-Channel Matching	2Ohm	2Ohm
Supply Voltage Range	2V ~ 5.5V	2V ~ 5.5V
Switch Time (Ton Max)	14ns	14ns
Switch Time (Toff Max)	8ns	8ns
-3dB Bandwidth	200MHz	200MHz
Charge Injection	3pC	3pC
Channel Capacitance (CS(off))	10pF	10pF
Channel Capacitance (CD(off))	10pF	10pF
Leakage Current (IS(off) Max)	1nA	1nA
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	6-TSSOP, SC-88, SOT-363	6-TSSOP, SC-88, SOT-363
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)	MSL 1 (Unlimited)
Product Status	Obsolete	Obsolete
Packaging Format	Cut Tape	Tape & Reel (TR)

Engineering Selection Recommendations

The NLAST4599DFT2G is a direct functional equivalent to the NLAST4599DFT2GH. Both parts maintain identical electrical specifications, thermal operating range, and package footprint. The primary distinction is packaging format: the substitute is supplied in Tape & Reel format, which is standard for high-volume manufacturing environments, whereas the main part is supplied in cut tape format.

Both parts carry obsolete product status classification. Selection between these two variants should be based on procurement requirements and assembly process compatibility. The NLAST4599DFT2G offers significantly higher inventory availability (65,100 pieces versus 799 pieces), making it the preferred choice for ongoing production support.

Compliance certifications are equivalent: both parts are ROHS3 compliant, carry MSL 1 rating, and meet REACH requirements. The substitute carries EAR99 ECCN classification and HTSUS code 8542.39.0001 for regulatory documentation purposes.

Frequently Asked Questions (FAQ)

Q: Can NLAST4599DFT2G be used as a direct replacement for NLAST4599DFT2GH in existing designs?

A: Yes. The electrical specifications, operating characteristics, and package footprint are identical. The only difference is the packaging format (Tape & Reel versus cut tape). PCB layout and circuit design require no modification.

Q: What is the difference between the two part numbers?

A: The NLAST4599DFT2GH is supplied in cut tape packaging, while NLAST4599DFT2G is supplied in Tape & Reel format. This affects procurement and assembly handling but does not impact electrical performance or physical footprint.

Q: Are both parts suitable for the same temperature range applications?

A: Yes. Both parts operate across the identical temperature range of -55°C to 125°C and carry the same MSL 1 moisture sensitivity rating.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching SPDT switch topology, 25Ohm on-state resistance, 2:1 multiplexing configuration, 2V to 5.5V supply voltage range, 200MHz bandwidth, and 6-TSSOP package form factor.

Q: Is the NLAST4599DFT2G available in higher quantities?

A: Yes. The substitute part has significantly higher inventory availability (65,100 pieces in stock versus 799 pieces for the main part), making it more suitable for production applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, carry MSL 1 rating, and are REACH unaffected. The substitute carries additional regulatory classifications (EAR99 ECCN, HTSUS 8542.39.0001) for export and tariff documentation.

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