SN74AXCH1T45DBVR Equivalent & Substitute Parts

Part Overview

The SN74AXCH1T45DBVR is a voltage level translator IC manufactured by Texas Instruments, designed for bidirectional signal translation between different voltage domains. This single-channel, single-circuit translator operates at data rates up to 500Mbps and supports supply voltages from 0.65V to 3.6V on both VCCA and VCCB rails. The device is packaged in SOT-23-6 surface mount configuration and maintains Active product status with ROHS3 compliance. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support alternative packaging requirements while maintaining functional compatibility.

Key Parameters

Parameter	Value
Translator Type	Voltage Level
Channel Type	Bidirectional
Number of Circuits	1
Channels per Circuit	1
Voltage - VCCA Range	0.65V ~ 3.6V
Voltage - VCCB Range	0.65V ~ 3.6V
Output Type	Tri-State, Non-Inverted
Data Rate	500Mbps
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	SOT-23-6
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74AXCH1T45DBVR are classified based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Translator Type: Voltage Level
Channel Type: Bidirectional
Number of Circuits: 1
Channels per Circuit: 1
Output Type: Tri-State, Non-Inverted
Operating Temperature Range: -40°C ~ 125°C (TA)
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

Voltage supply ranges (VCCA and VCCB)
Data rate capability
Package / Case form factor
Mounting type (Surface Mount)

Substitutes are grouped into two categories: parametric equivalents with identical electrical specifications and manufacturer-recommended alternatives with compatible but differing voltage ranges or data rates. Package variations are noted as they affect PCB layout and assembly compatibility.

Parameter Comparison

Part Number	Manufacturer	VCCA Range	VCCB Range	Data Rate	Package	Output Type	Temp Range
SN74AXCH1T45DBVR	Texas Instruments	0.65V ~ 3.6V	0.65V ~ 3.6V	500Mbps	SOT-23-6	Tri-State, Non-Inverted	-40°C ~ 125°C
SN74AXC1T45DBVR	Texas Instruments	0.65V ~ 3.6V	0.65V ~ 3.6V	500Mbps	SOT-23-6	Tri-State, Non-Inverted	-40°C ~ 125°C
74AVC1T45GM,132	Nexperia USA Inc.	0.8V ~ 3.6V	0.8V ~ 3.6V	500Mbps	6-XSON, SOT886	Tri-State, Non-Inverted	-40°C ~ 125°C
74AVC1T45GW,125	Nexperia USA Inc.	0.8V ~ 3.6V	0.8V ~ 3.6V	500Mbps	6-TSSOP, SC-88, SOT-363	Tri-State, Non-Inverted	-40°C ~ 125°C
74LVC1T45FX4-7	Diodes Incorporated	1.65V ~ 5.5V	1.65V ~ 5.5V	Not Specified	X2-DFN1409-6	Tri-State, Non-Inverted	-40°C ~ 125°C
74LVC1T45Z6-7	Diodes Incorporated	1.65V ~ 5.5V	1.65V ~ 5.5V	Not Specified	SOT-563, SOT-666	Tri-State, Non-Inverted	-40°C ~ 125°C
74LVCH1T45GM,132	Nexperia USA Inc.	1.2V ~ 5.5V	1.2V ~ 5.5V	420Mbps	6-XSON, SOT886	Tri-State, Non-Inverted	-40°C ~ 125°C
74LVCH1T45GS,132	NXP Semiconductors	Not Specified	Not Specified	Not Specified	Not Specified	Not Specified	-40°C ~ 125°C
ADG3233BRJZ-REEL7	Analog Devices Inc.	1.65V ~ 3.6V	1.65V ~ 3.6V	10Mbps	SOT-23-8	Non-Inverted	-40°C ~ 85°C
ADG3233BRMZ	Analog Devices Inc.	1.65V ~ 3.6V	1.65V ~ 3.6V	10Mbps	8-MSOP	Non-Inverted	-40°C ~ 85°C
LTC1555IGN	Analog Devices Inc.	1.8V ~ 5.5V	2.7V ~ 10V	Not Specified	16-SSOP	Open Drain	-40°C ~ 85°C

Engineering Selection Recommendations

Parametric Equivalent (Recommended for Direct Replacement):

SN74AXC1T45DBVR from Texas Instruments is a parametric equivalent offering identical electrical specifications and operating characteristics. This part maintains the same voltage ranges (0.65V ~ 3.6V), 500Mbps data rate, tri-state non-inverted output configuration, and temperature range. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel), which affects procurement and assembly logistics but not functional performance.

Manufacturer-Recommended Alternatives (Voltage Range Dependent):

Parts from the 74AVC series (Nexperia) and 74LVC series (Diodes Incorporated) are manufacturer-recommended substitutes with modified voltage specifications. The 74AVC1T45 variants maintain 500Mbps performance but require minimum supply voltages of 0.8V (versus 0.65V for the main part). The 74LVC1T45 variants support wider voltage ranges (1.65V ~ 5.5V) but do not specify data rate performance. These alternatives are suitable when supply voltage constraints differ from the original design.

Limited Compatibility Alternatives:

The 74LVCH1T45 series from Nexperia operates at 420Mbps with voltage ranges of 1.2V ~ 5.5V, representing a trade-off between performance and voltage flexibility. Analog Devices ADG3233 series provides lower data rates (10Mbps) with bypass circuit features and narrower temperature ranges (-40°C ~ 85°C), limiting applicability to lower-speed applications. The LTC1555IGN features open-drain output and asymmetric voltage ranges, making it unsuitable for direct substitution.

All recommended substitutes maintain ROHS3 compliance, Moisture Sensitivity Level 1, and Active product status.

Frequently Asked Questions (FAQ)

Q: Can SN74AXC1T45DBVR replace SN74AXCH1T45DBVR directly?

A: Yes. Both parts are Texas Instruments products with identical electrical specifications: 0.65V ~ 3.6V supply range, 500Mbps data rate, tri-state non-inverted output, and -40°C ~ 125°C operating temperature. The packaging difference (Cut Tape & Digi-Reel versus Tape & Reel) does not affect functional compatibility, only procurement and assembly handling.

Q: What is the minimum supply voltage difference between the main part and 74AVC1T45 alternatives?

A: The SN74AXCH1T45DBVR supports VCCA and VCCB down to 0.65V, while 74AVC1T45 variants require minimum 0.8V. This 0.15V difference is critical for ultra-low-voltage applications. Designs operating below 0.8V must use the original part or SN74AXC1T45DBVR equivalent.

Q: Are 74LVC1T45 parts suitable replacements for high-speed applications?

A: No. The 74LVC1T45 series does not specify data rate performance, whereas the main part guarantees 500Mbps operation. 74LVC1T45 parts are suitable only for applications where data rate specifications are not critical or where lower speeds are acceptable.

Q: What is the temperature range limitation of Analog Devices ADG3233 series?

A: ADG3233 parts operate from -40°C to 85°C, compared to -40°C to 125°C for the main part. This 40°C upper temperature limit excludes ADG3233 from applications requiring full industrial temperature range operation.

Q: How do package differences affect PCB design compatibility?

A: The main part uses SOT-23-6 packaging. Substitutes employ alternative packages: SOT-23-8 (ADG3233), 6-XSON/SOT886 (74AVC1T45GM, 74LVCH1T45GM), 6-TSSOP/SC-88 (74AVC1T45GW), X2-DFN1409-6 (74LVC1T45FX4-7), SOT-563 (74LVC1T45Z6-7), and 16-SSOP (LTC1555IGN). Package changes require PCB layout modifications and cannot be used as drop-in replacements without redesign.

Q: Which substitute offers the widest voltage range compatibility?

A: The 74LVC1T45 and 74LVCH1T45 series support 1.65V ~ 5.5V and 1.2V ~ 5.5V respectively, providing the broadest voltage flexibility. However, this flexibility comes with trade-offs in data rate specification and temperature range.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the environmental and regulatory status of the main part.

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