SN74LVC2G53DCU3 Equivalent & Substitute Parts

Part Overview

The SN74LVC2G53DCU3 is a single-circuit SPDT (Single Pole Double Throw) analog switch manufactured by Texas Instruments, designed for low-voltage signal routing applications. This device integrates a 2:1 multiplexer/demultiplexer function with 13Ohm on-state resistance in an 8-VSSOP surface mount package.

The SN74LVC2G53DCU3 carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production and sales of this specific part number. This status necessitates identification of equivalent substitute components to ensure design continuity and procurement availability for new production runs and ongoing support of existing designs.

Key Parameters

Parameter	Value	Unit
Switch Circuit Type	SPDT	—
Multiplexer/Demultiplexer Configuration	2:1	—
Number of Circuits	1	—
On-State Resistance (Maximum)	13	Ohm
Channel-to-Channel Matching (ΔRon)	2	Ohm (Max)
Supply Voltage Range (Single)	1.65 to 5.5	V
Switch Time (Ton, Toff)	4.5, 8	ns (Max)
-3dB Bandwidth	300	MHz
Channel Capacitance (CS(off), CD(off))	10	pF
Operating Temperature Range	-40 to 85	°C
Package Type	8-VFSOP (0.091", 2.30mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SN74LVC2G53DCU3 is determined by strict equivalence across the following critical parameters:

Functional Parameters:

Switch circuit topology: SPDT configuration
Multiplexer function: 2:1 architecture
Circuit count: Single circuit per package

Electrical Parameters:

On-state resistance: 13Ohm maximum
Channel-to-channel matching: 2Ohm maximum
Supply voltage range: 1.65V to 5.5V single supply
Switch timing: 4.5ns (Ton), 8ns (Toff) maximum
Bandwidth: 300MHz at -3dB
Channel capacitance: 10pF
Operating temperature: -40°C to 85°C

Physical Parameters:

Package: 8-VFSOP with 2.30mm width
Mounting: Surface mount technology
Compliance: ROHS3 compliant, MSL 1

The substitute part must maintain identical functional topology, electrical performance specifications, and physical package dimensions to ensure direct replacement capability without circuit redesign or PCB layout modification.

Parameter Comparison

Parameter	SN74LVC2G53DCU3 (Main Part)	SN74LVC2G53DCUR (Substitute)	Compatibility
Manufacturer	Texas Instruments	Texas Instruments	Identical
Series	74LVC	74LVC	Identical
Switch Circuit	SPDT	SPDT	Identical
Multiplexer Configuration	2:1	2:1	Identical
Number of Circuits	1	1	Identical
On-State Resistance (Max)	13 Ohm	13 Ohm	Identical
Channel-to-Channel Matching (ΔRon)	2 Ohm (Max)	2 Ohm (Max)	Identical
Supply Voltage (V+)	1.65V ~ 5.5V	1.65V ~ 5.5V	Identical
Switch Time (Ton, Toff)	4.5ns, 8ns (Max)	4.5ns, 8ns (Max)	Identical
-3dB Bandwidth	300 MHz	300 MHz	Identical
Channel Capacitance	10 pF	10 pF	Identical
Crosstalk	-58 dB @ 1MHz	-58 dB @ 1MHz	Identical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Package / Case	8-VFSOP (0.091", 2.30mm Width)	8-VFSOP (0.091", 2.30mm Width)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Last Time Buy	Active	Substitute is actively produced
Packaging Format	Tube	Tape & Reel (TR)	Different packaging; same component
Current - Leakage (IS(off)) Max	1 µA	100 nA	Substitute has lower leakage

Engineering Selection Recommendations

Primary Substitute: SN74LVC2G53DCUR

The SN74LVC2G53DCUR is the direct functional and electrical equivalent of the SN74LVC2G53DCU3. Both components share identical electrical specifications, package geometry, and performance characteristics across all critical parameters including switch topology, on-state resistance, bandwidth, and operating temperature range.

Procurement Advantage:

The SN74LVC2G53DCUR carries Active product status with 19,990 pieces in current inventory, compared to the Last Time Buy status of the SN74LVC2G53DCU3 with 3,154 pieces available. This availability differential makes the DCUR variant the preferred selection for new designs and ongoing production requirements.

Packaging Consideration:

The primary difference between these part numbers is packaging format. The SN74LVC2G53DCU3 is supplied in tube packaging, while the SN74LVC2G53DCUR is supplied in Tape & Reel (TR) format. Both formats contain identical components; the packaging difference reflects distribution and handling methodology only and does not affect component performance or functionality.

Leakage Current Specification:

The SN74LVC2G53DCUR specifies maximum leakage current (IS(off)) of 100nA, compared to 1µA for the SN74LVC2G53DCU3. This represents an improvement in leakage performance and is fully compatible with designs specified for the original part number.

Compliance Status:

Both components maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC2G53DCUR directly replace the SN74LVC2G53DCU3 on existing PCBs?

A: Yes. Both components are identical in electrical performance, pin configuration, and package dimensions (8-VFSOP, 2.30mm width). Direct substitution on PCBs is supported without circuit modification or layout changes.

Q: What is the difference between the DCU3 and DCUR part numbers?

A: The primary difference is packaging format. The DCU3 uses tube packaging; the DCUR uses Tape & Reel (TR) format. The internal components are functionally identical. The DCUR also specifies improved leakage current performance (100nA vs. 1µA maximum).

Q: Why is the SN74LVC2G53DCU3 marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued active production of this specific part number variant. The SN74LVC2G53DCUR remains in active production as the current distribution format for this component family.

Q: Are there any electrical performance differences between these parts?

A: All critical electrical parameters are identical: on-state resistance (13Ohm), switch timing (4.5ns/8ns), bandwidth (300MHz), and operating temperature range (-40°C to 85°C). The SN74LVC2G53DCUR specifies lower maximum leakage current (100nA vs. 1µA), which represents improved performance.

Q: What supply voltage range does this switch support?

A: Both the SN74LVC2G53DCU3 and SN74LVC2G53DCUR support single supply operation from 1.65V to 5.5V, making them suitable for low-voltage digital and analog signal routing applications.

Q: Is the SN74LVC2G53DCUR suitable for high-frequency applications?

A: Yes. The -3dB bandwidth specification of 300MHz supports high-frequency signal switching. Switch timing of 4.5ns (Ton) and 8ns (Toff) maximum enables rapid channel selection in time-critical applications.

Q: What is the channel-to-channel matching specification?

A: Both components specify maximum channel-to-channel resistance matching (ΔRon) of 2Ohm. This ensures balanced signal attenuation across the two switch channels, critical for applications requiring matched signal paths.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN74LVC2G53DCU3 and SN74LVC2G53DCUR are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and manufacturing standards.

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