SN74LVC2T45DCUR Equivalent & Substitute Parts

Part Overview

The SN74LVC2T45DCUR is a voltage level translator IC manufactured by Texas Instruments, designed for bidirectional signal translation between different voltage domains. This device operates as a single circuit with two channels, supporting data rates up to 420 Mbps with tri-state, non-inverted output configuration. The part is housed in an 8-VSSOP surface mount package and is ROHS3 compliant with unlimited moisture sensitivity level rating.

The SN74LVC2T45DCUR remains active in production with 35,100 units currently in stock. Equivalent and substitute parts are identified based on matching functional specifications, electrical parameters, and package compatibility to support design flexibility and supply chain alternatives.

Key Parameters

Parameter	Value
Translator Type	Voltage Level
Channel Type	Bidirectional
Number of Circuits	1
Channels per Circuit	2
Voltage - VCCA	1.65 V ~ 5.5 V
Voltage - VCCB	1.65 V ~ 5.5 V
Output Type	Tri-State, Non-Inverted
Data Rate	420 Mbps
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-VFSOP (0.091", 2.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC2T45DCUR are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications including voltage ranges (1.65 V ~ 5.5 V for both VCCA and VCCB), data rate (420 Mbps), operating temperature range (-40°C ~ 85°C), and package form factor (8-VSSOP). These parts are direct functional replacements with no design modifications required.

Manufacturer Recommended Alternatives offer enhanced performance characteristics including higher data rates (500 Mbps), extended operating temperature ranges (-40°C ~ 125°C), and automotive-grade qualifications (AEC-Q100). These parts may operate within different voltage ranges and package variants while maintaining the core bidirectional, dual-channel translator functionality. Selection of these alternatives requires verification of system voltage requirements and thermal operating conditions.

Key parameters determining substitution eligibility:

Bidirectional channel configuration with 2 channels per circuit
Tri-state, non-inverted output topology
Surface mount packaging with compatible footprints
ROHS3 compliance and MSL rating
Voltage translation capability across specified supply ranges

Parameter Comparison

Part Number	Manufacturer	Series	VCCA Range	VCCB Range	Data Rate	Temp Range	Package	Status
SN74LVC2T45DCUR	Texas Instruments	74LVC	1.65 V ~ 5.5 V	1.65 V ~ 5.5 V	420 Mbps	-40°C ~ 85°C	8-VSSOP	Active
SN74LVC2T45DCURG4	Texas Instruments	74LVC	1.65 V ~ 5.5 V	1.65 V ~ 5.5 V	420 Mbps	-40°C ~ 85°C	8-VSSOP	Discontinued at DiGi Electronics
SN74LVC2T45DCUT	Texas Instruments	74LVC	1.65 V ~ 5.5 V	1.65 V ~ 5.5 V	420 Mbps	-40°C ~ 85°C	8-VSSOP	Active
74AVC2T45DC-Q100H	Nexperia USA Inc.	74AVC	0.8 V ~ 3.6 V	0.8 V ~ 3.6 V	500 Mbps	-40°C ~ 125°C	8-VSSOP	Active
74AVC2T45DP,125	Nexperia USA Inc.	74AVC	0.8 V ~ 3.6 V	0.8 V ~ 3.6 V	500 Mbps	-40°C ~ 125°C	8-TSSOP	Active
74AVC2T45GT,115	Nexperia USA Inc.	74AVC	0.8 V ~ 3.6 V	0.8 V ~ 3.6 V	500 Mbps	-40°C ~ 125°C	8-XSON	Active
74AVCH2T45DC,125	Nexperia USA Inc.	74AVCH	0.8 V ~ 3.6 V	0.8 V ~ 3.6 V	500 Mbps	-40°C ~ 125°C	8-VSSOP	Active
74AVCH2T45GT,115	Nexperia USA Inc.	74AVCH	0.8 V ~ 3.6 V	0.8 V ~ 3.6 V	500 Mbps	-40°C ~ 125°C	8-XSON	Active
74LVC2T45DC,125	Nexperia USA Inc.	74LVC	1.2 V ~ 5.5 V	1.2 V ~ 5.5 V	420 Mbps	-40°C ~ 125°C	8-VSSOP	Active
74LVC2T45DC-Q100H	Nexperia USA Inc.	74LVC	1.2 V ~ 5.5 V	1.2 V ~ 5.5 V	420 Mbps	-40°C ~ 125°C	8-VSSOP	Active
74LVC2T45GN,115	Nexperia USA Inc.	74LVC	1.2 V ~ 5.5 V	1.2 V ~ 5.5 V	420 Mbps	-40°C ~ 125°C	8-XSON	Active

Engineering Selection Recommendations

Direct Parametric Equivalents (SN74LVC2T45DCURG4, SN74LVC2T45DCUT) are suitable for applications requiring identical electrical specifications and operating conditions as the SN74LVC2T45DCUR. The SN74LVC2T45DCUT is preferred as an active product with 2,100 units in stock, whereas SN74LVC2T45DCURG4 is discontinued at DiGi Electronics despite higher inventory availability.

Extended Temperature Range Alternatives (74LVC2T45DC,125, 74LVC2T45DC-Q100H, 74LVC2T45GN,115) maintain the 74LVC series voltage specifications (1.2 V ~ 5.5 V) and 420 Mbps data rate while extending operating temperature to -40°C ~ 125°C. The 74LVC2T45DC-Q100H includes automotive-grade AEC-Q100 qualification. These parts are suitable for applications requiring enhanced thermal performance without voltage domain changes.

Higher Performance Alternatives (74AVC2T45DC-Q100H, 74AVC2T45DP,125, 74AVC2T45GT,115, 74AVCH2T45DC,125, 74AVCH2T45GT,115) operate at reduced voltage ranges (0.8 V ~ 3.6 V) with increased data rates (500 Mbps) and extended temperature ranges (-40°C ~ 125°C). These parts are applicable only when system voltage domains are compatible with the lower supply range. The 74AVC series includes automotive-grade qualification.

All substitute parts maintain ROHS3 compliance, MSL rating of 1 (Unlimited), and tri-state, non-inverted output configuration. Package variants (8-VSSOP, 8-TSSOP, 8-XSON) require PCB layout verification for mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC2T45DCUR be replaced with a 74AVC series part?

A: The 74AVC series parts (74AVC2T45DC-Q100H, 74AVC2T45DP,125, 74AVC2T45GT,115) offer higher data rates (500 Mbps) and extended temperature ranges but operate at reduced voltage ranges (0.8 V ~ 3.6 V) compared to the SN74LVC2T45DCUR (1.65 V ~ 5.5 V). Substitution is valid only when system voltage domains are compatible with the 0.8 V ~ 3.6 V specification.

Q: What is the difference between 8-VSSOP and 8-TSSOP packages?

A: Both packages are 8-pin surface mount configurations. The 8-VSSOP (Very Small Shrink Small Outline Package) has a width of 0.091" (2.30mm), while the 8-TSSOP (Thin Shrink Small Outline Package) has a width of 0.118" (3.00mm). PCB footprints differ and must be verified for mechanical compatibility before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), matching the environmental and reliability specifications of the SN74LVC2T45DCUR.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive-grade qualification indicating the part meets automotive industry reliability and quality standards. Parts with this qualification (74AVC2T45DC-Q100H, 74LVC2T45DC-Q100H) are suitable for automotive applications requiring enhanced reliability assurance.

Q: Can I use 74LVC2T45DC,125 as a direct replacement?

A: The 74LVC2T45DC,125 is a parametric equivalent with matching 420 Mbps data rate and 8-VSSOP package. However, its voltage range (1.2 V ~ 5.5 V) is slightly narrower than the SN74LVC2T45DCUR (1.65 V ~ 5.5 V) at the lower end. Substitution is valid if system minimum voltage is 1.2 V or higher. The extended operating temperature range (-40°C ~ 125°C) provides additional thermal margin.

Q: What inventory levels are available for substitute parts?

A: Current inventory includes SN74LVC2T45DCUT (2,100 units), 74LVC2T45DC,125 (4,007 units), 74LVC2T45DC-Q100H (10,100 units), 74AVCH2T45DC,125 (168,502 units), and 74AVCH2T45GT,115 (176,914 units). Availability should be confirmed with the supplier for production requirements.

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