SN74LVC4245ADB Equivalent & Substitute Parts

Part Overview

The SN74LVC4245ADB is a voltage level translator manufactured by Texas Instruments, designed for bidirectional signal translation between different voltage domains. This device operates as a single-circuit, bidirectional translator with tri-state output capability, functioning in the 24-SSOP package. The part is currently in active production status with 1,096 units in stock.

Equivalent and substitute parts are identified based on matching functional characteristics: bidirectional translation capability, tri-state output configuration, compatible voltage supply ranges, and surface-mount packaging. Substitutes maintain the core translation function while offering variations in channel count, package form factor, data rate specifications, and supply voltage ranges.

Key Parameters

Parameter	SN74LVC4245ADB
Manufacturer	Texas Instruments
Series	74LVC
Translator Type	Voltage Level
Channel Type	Bidirectional
Number of Circuits	1
Voltage - VCCA	4.5 V ~ 5.5 V
Voltage - VCCB	2.7 V ~ 3.6 V
Output Type	Tri-State
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	24-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution logic for the SN74LVC4245ADB is based on the following critical parameters:

Primary Substitution Criteria:

Translator Type: Voltage Level (bidirectional capability required)
Output Type: Tri-State configuration
Number of Circuits: Single circuit
Operating Temperature Range: Minimum -40°C ~ 85°C
RoHS Compliance: ROHS3 Compliant
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Voltage Supply Ranges: VCCA and VCCB ranges must accommodate the application requirements
Package Form Factor: 24-pin packages (SSOP, TSSOP, DHVQFN, QSOP variants)
Channel Configuration: 8-channel per circuit for multi-bit translation
MSL Rating: Level 1 preferred for unlimited moisture sensitivity

Substitute parts are grouped into two categories:

Category 1: Direct Functional Equivalents (24-pin packages, 8-channel, single circuit)

74LVC8T245BQ-Q100J (Nexperia, 24-DHVQFN, automotive grade)
74LVC8T245PW,118 (Nexperia, 24-TSSOP, higher inventory)
74AVC8T245BQ-Q100J (Nexperia, 24-DHVQFN, automotive grade, lower voltage range)

Category 2: Functional Equivalents with Enhanced Features (8-channel, single circuit, alternative packages)

ADG3308BRUZ-REEL7 (Analog Devices, 20-TSSOP, auto-direction sensing, 50Mbps)
ADG3308BRUZ (Analog Devices, 20-TSSOP, auto-direction sensing, 50Mbps)
ADG3308BCBZ-1-RL7 (Analog Devices, 20-WLCSP, auto-direction sensing, 50Mbps)
FXL4245MPX (onsemi, 24-MLP, power-off protection)

Category 3: Functional Equivalents with Different Channel Architecture (single circuit, alternative packages)

74LVX3245QSCX (Fairchild Semiconductor, 24-QSOP, 8-channel, lower voltage VCCA range)
FXLA108BQX (onsemi, 20-DQFN, 8-channel, 140Mbps data rate, auto-direction sensing)

Parameter Comparison

Part Number	Manufacturer	Translator Type	Channel Type	Channels per Circuit	Voltage - VCCA	Voltage - VCCB	Output Type	Operating Temp	Package	Data Rate	RoHS
SN74LVC4245ADB	Texas Instruments	Voltage Level	Bidirectional	1 circuit	4.5V ~ 5.5V	2.7V ~ 3.6V	Tri-State	-40°C ~ 85°C	24-SSOP	—	ROHS3
74LVC8T245BQ-Q100J	Nexperia USA Inc.	Translation Transceiver	Bidirectional	8 bits per element	1.2V ~ 5.5V	1.2V ~ 5.5V	3-State	-40°C ~ 125°C	24-DHVQFN	—	ROHS3
74LVC8T245PW,118	Nexperia USA Inc.	Translation Transceiver	Bidirectional	8 bits per element	1.2V ~ 5.5V	1.2V ~ 5.5V	3-State	-40°C ~ 125°C	24-TSSOP	—	ROHS3
74AVC8T245BQ-Q100J	Nexperia USA Inc.	Translation Transceiver	Bidirectional	8 bits per element	0.8V ~ 3.6V	0.8V ~ 3.6V	3-State	-40°C ~ 125°C	24-DHVQFN	—	ROHS3
74LVX3245QSCX	Fairchild Semiconductor	Voltage Level	Bidirectional	8 channels	2.7V ~ 3.6V	4.5V ~ 5.5V	Tri-State	-40°C ~ 85°C	24-QSOP	—	—
ADG3308BCBZ-1-RL7	Analog Devices Inc.	Voltage Level	Bidirectional	8 channels	1.15V ~ 5.5V	1.65V ~ 5.5V	Tri-State	-40°C ~ 85°C	20-WLCSP	50Mbps	ROHS3
ADG3308BRUZ-REEL7	Analog Devices Inc.	Voltage Level	Bidirectional	8 channels	1.15V ~ 5.5V	1.65V ~ 5.5V	Tri-State	-40°C ~ 85°C	20-TSSOP	50Mbps	ROHS3
FXL4245MPX	onsemi	Voltage Level	Bidirectional	8 channels	1.1V ~ 3.6V	1.1V ~ 3.6V	Tri-State	-40°C ~ 85°C	24-MLP	—	ROHS3
FXLA108BQX	onsemi	Voltage Level	Bidirectional	8 channels	1.1V ~ 3.6V	1.1V ~ 3.6V	Tri-State	-40°C ~ 85°C	20-DQFN	140Mbps	ROHS3

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (24-pin SSOP/TSSOP packages):

The 74LVC8T245PW,118 (Nexperia) offers the closest functional match with 24-TSSOP packaging. This part maintains bidirectional tri-state output configuration, operates across an extended temperature range (-40°C ~ 125°C), and carries ROHS3 compliance. With 2,800 units in stock and automotive-grade AEC-Q100 qualification, this substitute provides enhanced reliability margins. The supply voltage range (1.2V ~ 5.5V) encompasses the original part's operating window.

For Automotive-Grade Applications:

The 74LVC8T245BQ-Q100J (Nexperia, 24-DHVQFN) provides AEC-Q100 qualification with automotive-grade certification. This part operates across -40°C ~ 125°C and maintains tri-state output configuration. The 24-DHVQFN package differs from the original 24-SSOP form factor but provides equivalent electrical functionality. Inventory availability is 1,506 units.

For Lower Voltage Domain Applications:

The 74AVC8T245BQ-Q100J (Nexperia, 24-DHVQFN) supports lower supply voltage ranges (0.8V ~ 3.6V) while maintaining automotive qualification and tri-state output. This part is suitable when both voltage domains operate below 3.6V. Operating temperature extends to 125°C.

For Enhanced Data Rate Requirements:

The FXLA108BQX (onsemi, 20-DQFN) provides 140Mbps data rate capability with auto-direction sensing and power-off protection features. This part operates across 1.1V ~ 3.6V supply ranges and maintains tri-state output. The 20-DQFN package is more compact than the original 24-SSOP. Inventory availability is 64,400 units.

For Flexible Voltage Domain Translation:

The ADG3308BRUZ-REEL7 (Analog Devices, 20-TSSOP) supports asymmetric voltage domains (VCCA: 1.15V ~ 5.5V, VCCB: 1.65V ~ 5.5V) with auto-direction sensing and 50Mbps data rate. This part provides the highest inventory availability (9,896 units) and maintains tri-state output configuration. Operating temperature range is -40°C ~ 85°C, matching the original specification.

For Compact Package Footprint:

The ADG3308BCBZ-1-RL7 (Analog Devices, 20-WLCSP) offers the smallest package form factor (2.5x2mm) while maintaining 8-channel bidirectional translation with 50Mbps data rate and auto-direction sensing. This part supports wide voltage ranges (VCCA: 1.15V ~ 5.5V, VCCB: 1.65V ~ 5.5V) and carries ROHS3 compliance.

For Symmetric Low-Voltage Domains:

The FXL4245MPX (onsemi, 24-MLP) provides symmetric voltage support (1.1V ~ 3.6V for both domains) with power-off protection and tri-state output. The 24-MLP package maintains similar pin count to the original. Inventory availability is 19,376 units.

Frequently Asked Questions (FAQ)

Q: Can the 74LVC8T245BQ-Q100J directly replace the SN74LVC4245ADB in a 24-SSOP socket?

A: No. The 74LVC8T245BQ-Q100J uses a 24-DHVQFN package, which has different pin spacing and layout compared to the 24-SSOP package of the SN74LVC4245ADB. PCB redesign is required. For direct socket compatibility, use the 74LVC8T245PW,118 in 24-TSSOP package.

Q: What is the key difference between the 74LVC8T245BQ-Q100J and 74AVC8T245BQ-Q100J?

A: The primary difference is supply voltage range. The 74LVC8T245BQ-Q100J operates at 1.2V ~ 5.5V, while the 74AVC8T245BQ-Q100J operates at 0.8V ~ 3.6V. Both maintain tri-state output and automotive qualification. Select based on your application's voltage domain requirements.

Q: Does the ADG3308BRUZ-REEL7 require different PCB layout considerations compared to the SN74LVC4245ADB?

A: Yes. The ADG3308BRUZ-REEL7 uses a 20-TSSOP package versus the original 24-SSOP, resulting in different pin counts and spacing. Additionally, the ADG3308 features auto-direction sensing, which may eliminate the need for external direction control logic. PCB redesign is necessary.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitutes listed carry ROHS3 compliance. The 74LVX3245QSCX (Fairchild Semiconductor) does not specify RoHS status in the provided data. Verify RoHS compliance with the manufacturer if this is a requirement for your application.

Q: What is the advantage of the FXLA108BQX over the SN74LVC4245ADB?

A: The FXLA108BQX provides 140Mbps data rate capability, auto-direction sensing, and power-off protection. However, it operates only across 1.1V ~ 3.6V supply ranges (lower than the original 4.5V ~ 5.5V VCCA range) and uses a 20-DQFN package requiring PCB redesign.

Q: Can I use the 74LVX3245QSCX as a substitute if my application requires 5V to 3.3V translation?

A: The 74LVX3245QSCX supports VCCA: 2.7V ~ 3.6V and VCCB: 4.5V ~ 5.5V, which is the reverse polarity of the SN74LVC4245ADB (VCCA: 4.5V ~ 5.5V, VCCB: 2.7V ~ 3.6V). This part can function in your application if the voltage domain assignment is reversed. Verify signal direction requirements before implementation.

Q: Which substitute offers the highest inventory availability?

A: The ADG3308BRUZ-REEL7 (Analog Devices) offers the highest inventory with 9,896 units in stock. The FXLA108BQX (onsemi) provides 64,400 units, offering the largest available quantity among all substitutes.

Q: Do all substitutes maintain the same tri-state output configuration?

A: Yes. All listed substitutes maintain tri-state (3-state) output configuration, which is essential for bus-sharing applications. This is a core requirement for voltage level translator substitution.

Q: What is the operating temperature range difference between the original and substitutes?

A: The SN74LVC4245ADB operates at -40°C ~ 85°C. Most Nexperia substitutes (74LVC8T245 series) extend to -40°C ~ 125°C, providing wider temperature margin. Analog Devices and onsemi parts maintain -40°C ~ 85°C matching the original specification.

Q: Can the ADG3308 series handle asymmetric voltage domains?

A: Yes. The ADG3308 series supports asymmetric voltage domains with VCCA: 1.15V ~ 5.5V and VCCB: 1.65V ~ 5.5V. This provides flexibility for applications where the two translation domains operate at different voltage levels within these ranges.

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