74LVC245ADB,112 Equivalent & Substitute Parts

Part Overview

The 74LVC245ADB,112 is a non-inverting transceiver logic IC manufactured by Nexperia USA Inc., designed for 8-bit bidirectional data transfer with 3-state output capability. Operating across a supply voltage range of 1.2V to 3.6V, this component is housed in a 20-SSOP package and rated for -40°C to 125°C operating temperature. The part is currently listed as obsolete, making equivalent and substitute parts essential for ongoing design support and production continuity.

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	1.2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LVC245ADB,112 is determined by the following critical parameters: logic type (non-inverting transceiver), bit configuration (1 element, 8 bits per element), output type (3-state), output current capability (24mA), supply voltage range compatibility, operating temperature range, and package type. Substitute parts are grouped into two categories based on package compatibility:

Package-Compatible Substitutes (20-SSOP): Parts maintaining identical 20-SSOP packaging allow direct PCB replacement without layout modification. These include SN74LVC245ADB and SN74LVC245ADBR from Texas Instruments, and SN74LVCH245ADBR from the 74LVCH series.

Functionally Equivalent Substitutes (20-TSSOP/20-TVSOP): Parts with different surface-mount packages (20-TSSOP or 20-TVSOP) provide electrical equivalence but require PCB layout adjustment. These include 74LVC245APW,118 (NXP), 74LCX245MTC and 74LCX245MTCX (onsemi), SN74LVC245ADGVR, SN74LVC245AIPWREP, SN74LVC245APW, and SN74LVC245APWT (Texas Instruments).

Parameter Comparison

Part Number	Manufacturer	Series	Package / Case	Voltage - Supply	Operating Temperature	Product Status	Output Current (mA)
74LVC245ADB,112	Nexperia USA Inc.	74LVC	20-SSOP (5.30mm)	1.2V ~ 3.6V	-40°C ~ 125°C	Obsolete	24, 24
74LVC245APW,118	NXP Semiconductors	74LVC	20-TSSOP (4.40mm)	1.2V ~ 3.6V	-40°C ~ 125°C	Active	24, 24
74LCX245MTC	onsemi	74LCX	20-TSSOP (4.40mm)	2V ~ 3.6V	-40°C ~ 85°C	Active	24, 24
74LCX245MTCX	onsemi	74LCX	20-TSSOP (4.40mm)	2V ~ 3.6V	-40°C ~ 85°C	Active	24, 24
SN74LVC245ADB	Texas Instruments	74LVC	20-SSOP (5.30mm)	1.65V ~ 3.6V	-40°C ~ 125°C	Active	24, 24
SN74LVC245ADBR	Texas Instruments	74LVC	20-SSOP (5.30mm)	1.65V ~ 3.6V	-40°C ~ 125°C	Active	24, 24
SN74LVC245ADGVR	Texas Instruments	74LVC	20-TFSOP (4.40mm)	1.65V ~ 3.6V	-40°C ~ 125°C	Active	24, 24
SN74LVC245AIPWREP	Texas Instruments	74LVC	20-TSSOP (4.40mm)	1.65V ~ 3.6V	-40°C ~ 85°C	Active	24, 24
SN74LVC245APW	Texas Instruments	74LVC	20-TSSOP (4.40mm)	1.65V ~ 3.6V	-40°C ~ 125°C	Active	24, 24
SN74LVC245APWT	Texas Instruments	74LVC	20-TSSOP (4.40mm)	1.65V ~ 3.6V	-40°C ~ 125°C	Active	24, 24
SN74LVCH245ADBR	Texas Instruments	74LVCH	20-SSOP (5.30mm)	1.65V ~ 3.6V	-40°C ~ 125°C	Active	24, 24

Engineering Selection Recommendations

For direct PCB replacement without layout modification, select SN74LVC245ADBR or SN74LVC245ADB from Texas Instruments. Both maintain the 20-SSOP package footprint and are in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating. SN74LVC245ADBR is available in higher quantities (25,100 pcs) with Cut Tape and Digi-Reel packaging options.

For applications permitting package redesign, 74LVC245APW,118 from NXP Semiconductors offers the most direct functional equivalence with identical voltage and temperature specifications in a 20-TSSOP package. This part is in active production with 190,454 pcs in stock.

The 74LCX series parts (74LCX245MTC and 74LCX245MTCX from onsemi) provide functional equivalence with reduced minimum supply voltage (2V vs. 1.2V) and lower maximum operating temperature (85°C vs. 125°C). These are suitable only for applications not requiring the full -40°C to 125°C temperature range or sub-2V operation.

SN74LVCH245ADBR from Texas Instruments maintains 20-SSOP package compatibility and full temperature range but operates at a minimum supply voltage of 1.65V, making it suitable for most legacy replacement scenarios.

Frequently Asked Questions (FAQ)

Q: Can I use a 20-TSSOP package substitute in place of the 20-SSOP original?

A: Electrically, yes. However, 20-TSSOP and 20-SSOP packages have different footprints and pin spacing. Direct PCB substitution is not possible without layout modification. The 20-TSSOP package is narrower (4.40mm vs. 5.30mm width), requiring new PCB artwork and component placement.

Q: What is the minimum supply voltage difference between the original and Texas Instruments substitutes?

A: The 74LVC245ADB,112 operates from 1.2V minimum, while Texas Instruments SN74LVC245 variants operate from 1.65V minimum. This 0.45V difference is significant for ultra-low-power applications. Verify your circuit's minimum supply voltage requirement before substitution.

Q: Are onsemi 74LCX245 parts fully compatible?

A: The 74LCX245MTC and 74LCX245MTCX provide electrical equivalence for the core transceiver function but have two limitations: minimum supply voltage is 2V (vs. 1.2V), and maximum operating temperature is 85°C (vs. 125°C). Use only if your application operates within these constraints.

Q: Which substitute offers the best inventory availability?

A: 74LVC245APW,118 from NXP Semiconductors has the highest stock level at 190,454 pcs. SN74LVC245ADBR from Texas Instruments is the second option with 25,100 pcs available in Cut Tape and Digi-Reel packaging.

Q: Do all substitutes maintain RoHS3 compliance?

A: Yes. All listed substitute parts are RoHS3 compliant with MSL rating of 1 (Unlimited), matching the original part's environmental and regulatory status.

Q: What is the key difference between SN74LVC245APW and SN74LVC245APWT?

A: Both parts are electrically identical in 20-TSSOP packages with identical specifications. The primary difference is packaging: SN74LVC245APW is supplied in Tube packaging, while SN74LVC245APWT is supplied in Tape & Reel format. Select based on your assembly process requirements.

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