SN74LVC245ADBR Equivalent & Substitute Parts

Part Overview

The SN74LVC245ADBR is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data bus switching applications. This device operates across a supply voltage range of 1.65V to 3.6V and features 3-state output capability, making it suitable for bidirectional data transfer in low-voltage digital systems. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on matching functional characteristics, electrical parameters, and mechanical compatibility within the 74LVC logic family and related series.

Key Parameters

Parameter	Value
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC245ADBR are classified based on the following substitution criteria:

Primary Substitution Parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Output Current Capability: 24mA minimum (High and Low)
Supply Voltage Range: Minimum 1.65V support
Operating Temperature Range: -40°C to 125°C minimum
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Package Compatibility Considerations: Substitutes are grouped into two categories based on package type:

20-SSOP Package (0.209" width): Direct mechanical and electrical equivalents
20-TSSOP Package (0.173" width): Functionally equivalent with different footprint dimensions

Parts meeting all primary substitution parameters are considered parametric equivalents. Variations in packaging type require PCB layout modification but do not affect electrical functionality.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Output Current (mA)	Supply Voltage (V)	Temp Range (°C)	Package	Status
SN74LVC245ADBR	Texas Instruments	74LVC	Transceiver, Non-Inverting	24, 24	1.65 ~ 3.6	-40 ~ 125	20-SSOP	Active
SN74LVCH245ADBR	Texas Instruments	74LVCH	Transceiver, Non-Inverting	24, 24	1.65 ~ 3.6	-40 ~ 125	20-SSOP	Active
74LCX245MTC	onsemi	74LCX	Transceiver, Non-Inverting	24, 24	2.0 ~ 3.6	-40 ~ 85	20-TSSOP	Active
74LCX245MTCX	onsemi	74LCX	Transceiver, Non-Inverting	24, 24	2.0 ~ 3.6	-40 ~ 85	20-TSSOP	Active
74LVC2245APW,118	Nexperia USA Inc.	74LVC	Transceiver, Non-Inverting	12, 12	1.2 ~ 3.6	-40 ~ 125	20-TSSOP	Active
74LVC245APW,112	Nexperia USA Inc.	74LVC	Transceiver, Non-Inverting	24, 24	1.2 ~ 3.6	-40 ~ 125	20-TSSOP	Obsolete
74LVC245APW,118	NXP Semiconductors	74LVC	Transceiver, Non-Inverting	24, 24	1.2 ~ 3.6	-40 ~ 125	20-TSSOP	Active
74LVCH245APW,118	NXP Semiconductors	74LVCH	Transceiver, Non-Inverting	24, 24	1.2 ~ 3.6	-40 ~ 125	20-TSSOP	Active
MC74LCX245DTR2G	onsemi	74LCX	Transceiver, Non-Inverting	24, 24	2.0 ~ 5.5	-55 ~ 125	20-TSSOP	Active

Engineering Selection Recommendations

Direct Equivalents (Same Package - 20-SSOP):

SN74LVCH245ADBR from Texas Instruments is a parametric equivalent offering identical electrical specifications and package form factor. Both parts maintain the same 24mA output current, 1.65V to 3.6V supply range, and -40°C to 125°C operating temperature. Selection between these parts depends on availability and supply chain requirements, as both are active production items with ROHS3 compliance.

Functionally Equivalent Alternatives (20-TSSOP Package):

Parts utilizing the 20-TSSOP package (0.173" width) provide electrical equivalence but require PCB layout modification due to different footprint dimensions. These include:

74LVC245APW,118 (NXP Semiconductors): Maintains 24mA output current and full temperature range (-40°C to 125°C). Active production status with high inventory availability.
74LVCH245APW,118 (NXP Semiconductors): Identical electrical specifications to 74LVC245APW,118 variant. Active production with largest inventory stock (257,577 pcs).
MC74LCX245DTR2G (onsemi): Extends supply voltage range to 5.5V and operating temperature to -55°C, providing enhanced environmental performance for demanding applications.

Limited Substitution Candidates:

74LCX245MTC and 74LCX245MTCX (onsemi) maintain 24mA output current but operate within 2.0V to 3.6V supply range and -40°C to 85°C temperature limits. These parts are suitable only for applications not requiring the full 1.65V minimum supply voltage or extended temperature operation to 125°C.

74LVC2245APW,118 (Nexperia USA Inc.) provides reduced output current (12mA) and is not recommended as a direct substitute for applications requiring 24mA drive capability.

74LVC245APW,112 (Nexperia USA Inc.) is marked obsolete and should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can I use a 20-TSSOP package part as a direct replacement for the 20-SSOP SN74LVC245ADBR?

A: Electrically, yes. Functionally equivalent 20-TSSOP parts meet all electrical specifications. However, the different package footprint (0.173" versus 0.209" width) requires PCB layout modification. Direct socket substitution is not possible without redesign.

Q: What is the minimum supply voltage requirement for substitute selection?

A: The SN74LVC245ADBR operates from 1.65V minimum. Substitute parts must support this voltage floor. The 74LCX series parts (74LCX245MTC, 74LCX245MTCX, MC74LCX245DTR2G) operate from 2.0V minimum and are not suitable for 1.65V applications.

Q: Why does MC74LCX245DTR2G have a different temperature range?

A: MC74LCX245DTR2G extends the upper supply voltage to 5.5V and lower operating temperature to -55°C, reflecting onsemi's 74LCX series design specifications. This part is suitable for applications requiring extended environmental performance but operates within the same -40°C to 125°C range as the main part at standard supply voltages.

Q: Is the 74LVC2245APW,118 a suitable substitute?

A: No. While functionally a transceiver, this part provides only 12mA output current compared to the required 24mA. Applications requiring full 24mA drive capability cannot use this part.

Q: What is the significance of the output current rating in substitution?

A: Output current rating determines the maximum load-driving capability. The SN74LVC245ADBR provides 24mA for both high and low outputs. Substitute parts must meet or exceed this specification to ensure proper signal integrity and load handling in the target application.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts carry ROHS3 compliance certification, matching the environmental compliance status of the SN74LVC245ADBR.

Q: Why is 74LVC245APW,112 listed but marked obsolete?

A: This part is included for reference in legacy system documentation and component traceability. New designs should not specify this part. Active alternatives include 74LVC245APW,118 from NXP Semiconductors or 74LVCH245APW,118.

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