SN74LVC1T45MDCKREP Equivalent & Substitute Parts

Part Overview

The SN74LVC1T45MDCKREP is a bidirectional voltage level translator manufactured by Texas Instruments, designed for single-channel logic signal conversion between different voltage domains. This SC-70-6 packaged device operates across supply voltages from 1.65 V to 5.5 V on both channels, supporting data rates up to 420 Mbps with tri-state, non-inverted output configuration. The part is active in production status and ROHS3 compliant. Substitute parts are identified to provide design flexibility across different manufacturers, packaging options, and operational temperature ranges while maintaining core functional equivalence.

Key Parameters

Parameter	Value
Translator Type	Voltage Level
Channel Type	Bidirectional
Number of Circuits	1
Channels per Circuit	1
Voltage - VCCA Range	1.65 V ~ 5.5 V
Voltage - VCCB Range	1.65 V ~ 5.5 V
Output Type	Tri-State, Non-Inverted
Data Rate	420 Mbps
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	6-TSSOP, SC-88, SOT-363
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC1T45MDCKREP are grouped based on the following substitution criteria:

Primary Substitution Criteria:

Translator Type: Voltage Level (bidirectional)
Channel Configuration: 1 Circuit, 1 Channel
Output Type: Tri-State, Non-Inverted
Voltage Supply Compatibility: VCCA and VCCB ranges must support the application requirements
Package Compatibility: Surface mount packages (6-TSSOP, SOT-363, SC-70-6, or equivalent footprints)
RoHS Compliance: ROHS3 Compliant

Grouping Logic:

Group 1 (74LVC Series - Direct Functional Equivalents): Parts maintaining 420 Mbps data rate, 1.65 V ~ 5.5 V supply range, and tri-state output. Includes 74LVC1T45DW-7, 74LVC1T45GW,125, and 74LVC1T45GW-Q100H.
Group 2 (74LVCH Series - Enhanced Temperature Range): Parts with extended automotive qualification (AEC-Q100), 420 Mbps data rate, and 1.2 V ~ 5.5 V supply range. Includes 74LVCH1T45GW,125 and 74LVCH1T45GW-Q100H.
Group 3 (Analog Devices - Alternative Architecture): ADG3301BKSZ-REEL7 and ADG3233 variants offering auto-direction sensing or bypass circuit features with reduced data rates (10 Mbps to 50 Mbps) and narrower voltage ranges.
Group 4 (onsemi - Compact Packaging): FXLA101L6X with auto-direction sensing and power-off protection in 6-MicroPak package, supporting 140 Mbps data rate and 1.1 V ~ 3.6 V supply range.
Group 5 (Linear Technology - Specialized Application): LTC1555IGN#PBF with integrated SIM card interface and thermal-shutdown protection, supporting asymmetric voltage ranges (1.8 V ~ 5.5 V and 2.7 V ~ 10 V).

Parameter Comparison

Part Number	Manufacturer	Translator Type	Channel Type	VCCA Range	VCCB Range	Output Type	Data Rate	Temp Range	Package	Product Status
SN74LVC1T45MDCKREP	Texas Instruments	Voltage Level	Bidirectional	1.65 V ~ 5.5 V	1.65 V ~ 5.5 V	Tri-State, Non-Inverted	420 Mbps	-55°C ~ 125°C	SC-70-6	Active
74LVC1T45DW-7	Diodes Incorporated	Voltage Level	Bidirectional	1.65 V ~ 5.5 V	1.65 V ~ 5.5 V	Tri-State, Non-Inverted	—	-40°C ~ 125°C	SOT-363	Active
74LVC1T45GW,125	Nexperia USA Inc.	Voltage Level	Bidirectional	1.2 V ~ 5.5 V	1.2 V ~ 5.5 V	Tri-State, Non-Inverted	420 Mbps	-40°C ~ 125°C	6-TSSOP	Active
74LVC1T45GW-Q100H	Nexperia USA Inc.	Voltage Level	Bidirectional	1.2 V ~ 5.5 V	1.2 V ~ 5.5 V	Tri-State, Non-Inverted	420 Mbps	-40°C ~ 125°C	6-TSSOP	Active
74LVCH1T45GW,125	Nexperia USA Inc.	Voltage Level	Bidirectional	1.2 V ~ 5.5 V	1.2 V ~ 5.5 V	Tri-State, Non-Inverted	420 Mbps	-40°C ~ 125°C	6-TSSOP	Active
74LVCH1T45GW-Q100H	Nexperia USA Inc.	Voltage Level	Bidirectional	1.2 V ~ 5.5 V	1.2 V ~ 5.5 V	Tri-State, Non-Inverted	420 Mbps	-40°C ~ 125°C	6-TSSOP	Active
ADG3301BKSZ-REEL7	Analog Devices Inc.	Voltage Level	Bidirectional	1.15 V ~ 5.5 V	1.65 V ~ 5.5 V	Tri-State, Non-Inverted	50 Mbps	-40°C ~ 85°C	SC-70-6	Active
ADG3233BRJZ-REEL7	Analog Devices Inc.	Voltage Level	Bidirectional	1.65 V ~ 3.6 V	1.65 V ~ 3.6 V	Non-Inverted	10 Mbps	-40°C ~ 85°C	SOT-23-8	Active
ADG3233BRMZ	Analog Devices Inc.	Voltage Level	Bidirectional	1.65 V ~ 3.6 V	1.65 V ~ 3.6 V	Non-Inverted	10 Mbps	-40°C ~ 85°C	8-MSOP	Active
FXLA101L6X	onsemi	Voltage Level	Bidirectional	1.1 V ~ 3.6 V	1.1 V ~ 3.6 V	Tri-State, Non-Inverted	140 Mbps	-40°C ~ 85°C	6-MicroPak	Active
LTC1555IGN#PBF	Linear Technology	Voltage Level	Bidirectional	1.8 V ~ 5.5 V	2.7 V ~ 10 V	Open Drain	—	-40°C ~ 85°C	16-SSOP	Active

Engineering Selection Recommendations

For Direct Functional Replacement (Highest Compatibility): Select 74LVC1T45GW,125 or 74LVC1T45GW-Q100H from Nexperia USA Inc. Both parts maintain the 420 Mbps data rate, tri-state non-inverted output, and support the full 1.2 V ~ 5.5 V supply range on both channels. The 74LVC1T45GW-Q100H variant includes AEC-Q100 automotive qualification for applications requiring automotive-grade reliability.

For Extended Temperature Operation: The SN74LVC1T45MDCKREP operates to -55°C, which exceeds standard commercial grade. For applications requiring this extended lower temperature limit, verify that substitute parts meet the specific minimum temperature requirement. Standard commercial-grade substitutes operate to -40°C minimum.

For Automotive Applications: Select 74LVC1T45GW-Q100H or 74LVCH1T45GW-Q100H, both qualified to AEC-Q100 standard. These parts are suitable for automotive-grade designs requiring formal qualification documentation.

For Reduced Supply Voltage Range Applications: ADG3301BKSZ-REEL7 supports VCCA down to 1.15 V, providing extended low-voltage operation. However, this part operates at 50 Mbps maximum data rate and is limited to -40°C ~ 85°C temperature range.

For Compact Packaging: FXLA101L6X in 6-MicroPak package provides the smallest footprint option with 140 Mbps data rate capability. Supply voltage range is limited to 1.1 V ~ 3.6 V on both channels.

For Specialized Applications: LTC1555IGN#PBF is suitable only for applications requiring integrated SIM card interface functionality and asymmetric voltage translation (1.8 V ~ 5.5 V to 2.7 V ~ 10 V). This part is not a general-purpose substitute due to its specialized feature set and open-drain output configuration.

All recommended substitutes maintain ROHS3 compliance and MSL rating of 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q: Can I substitute the SN74LVC1T45MDCKREP with any of the listed parts without design changes?

A: Direct substitution without design changes is possible with 74LVC1T45GW,125 and 74LVC1T45GW-Q100H, as both maintain identical functional specifications (420 Mbps, tri-state output, 1.2 V ~ 5.5 V supply range). Other substitutes may require design verification due to differences in data rate, supply voltage range, output type, or package footprint.

Q: What is the key difference between 74LVC1T45GW,125 and 74LVC1T45GW-Q100H?

A: Both parts are electrically identical. The 74LVC1T45GW-Q100H includes AEC-Q100 automotive qualification, making it suitable for automotive applications requiring formal qualification documentation. Select the Q100H variant for automotive designs.

Q: Why does ADG3301BKSZ-REEL7 have a lower data rate (50 Mbps) compared to the original part (420 Mbps)?

A: The ADG3301 architecture includes auto-direction sensing circuitry, which reduces maximum data rate capability. This part is suitable only for applications where the 50 Mbps data rate is sufficient and auto-direction sensing provides system-level benefits.

Q: Can I use ADG3233BRJZ-REEL7 as a substitute if my application operates below 10 Mbps?

A: Yes, ADG3233BRJZ-REEL7 is functionally compatible for low-speed applications (maximum 10 Mbps). However, the supply voltage range is limited to 1.65 V ~ 3.6 V on both channels, which is narrower than the original part. Verify that your application supply voltages fall within this range.

Q: What is the difference between the SC-70-6 package of the original part and the 6-TSSOP package of substitute parts?

A: SC-70-6 and 6-TSSOP are equivalent package designations for the same physical form factor (6-pin, 0.65 mm pitch surface mount). Both are footprint-compatible. SOT-363 is an alternative designation for the same package. Verify PCB layout compatibility with your design.

Q: Is the LTC1555IGN#PBF suitable as a general-purpose substitute?

A: No. The LTC1555IGN#PBF is designed for SIM card interface applications with integrated power supply functionality. It features open-drain output (not tri-state) and asymmetric voltage ranges (1.8 V ~ 5.5 V and 2.7 V ~ 10 V). Use this part only for applications requiring its specialized SIM card interface features.

Q: Which substitute part offers the best performance for high-speed applications?

A: 74LVC1T45GW,125 and 74LVC1T45GW-Q100H maintain the 420 Mbps data rate of the original part. FXLA101L6X offers 140 Mbps, which is lower but still suitable for many high-speed applications. ADG3301BKSZ-REEL7 is limited to 50 Mbps, and ADG3233 variants are limited to 10 Mbps.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original part's compliance status.

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