SN74LVC245APWRG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC245APWRG4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, featuring 1 element with 8 bits per element and 3-state output capability. This device operates across a supply voltage range of 1.65V to 3.6V and is housed in a 20-TSSOP surface mount package. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Series	74LVC
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-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC245APWRG4 is determined by the following critical parameters:

Logic Type: Transceiver, Non-Inverting (1 element, 8 bits per element, 3-state output)
Package / Case: 20-TSSOP surface mount form factor
Voltage - Supply: Minimum 1.65V support required
Operating Temperature: -40°C to 125°C range
Output Current: 24mA capability for both high and low states
RoHS3 Compliance and MSL Level 1

Substitute parts are grouped into two categories: Texas Instruments 74LVC and 74LVCH series variants (packaging differences only), alternative manufacturers offering 74LCX series equivalents with modified voltage specifications, and Nexperia variants with different output current ratings or voltage ranges. Parts failing to meet the core electrical parameters or package specification are excluded from substitution consideration.

Parameter Comparison

Part Number	Manufacturer	Series	Output Current (mA)	Voltage Supply (V)	Operating Temp (°C)	Packaging	Product Status
SN74LVC245APWRG4	Texas Instruments	74LVC	24, 24	1.65 ~ 3.6	-40 ~ 125	20-TSSOP	Discontinued
SN74LVC245APWR	Texas Instruments	74LVC	24, 24	1.65 ~ 3.6	-40 ~ 125	20-TSSOP	Active
SN74LVC245APWRG3	Texas Instruments	74LVC	24, 24	1.65 ~ 3.6	-40 ~ 125	20-TSSOP	Active
SN74LVC245APWT	Texas Instruments	74LVC	24, 24	1.65 ~ 3.6	-40 ~ 125	20-TSSOP	Active
SN74LVCH245APWR	Texas Instruments	74LVCH	24, 24	1.65 ~ 3.6	-40 ~ 125	20-TSSOP	Active
SN74LVCH245APWT	Texas Instruments	74LVCH	24, 24	1.65 ~ 3.6	-40 ~ 125	20-TSSOP	Active
74LCX245MTC	onsemi	74LCX	24, 24	2.0 ~ 3.6	-40 ~ 85	20-TSSOP	Active
74LCX245MTCX	onsemi	74LCX	24, 24	2.0 ~ 3.6	-40 ~ 85	20-TSSOP	Active
74LVC2245APW,118	Nexperia USA Inc.	74LVC	12, 12	1.2 ~ 3.6	-40 ~ 125	20-TSSOP	Active
74LVC245APW,112	Nexperia USA Inc.	74LVC	24, 24	1.2 ~ 3.6	-40 ~ 125	20-TSSOP	Obsolete
74LVC245APW,118	NXP Semiconductors	74LVC	24, 24	1.2 ~ 3.6	-40 ~ 125	20-TSSOP	Active

Engineering Selection Recommendations

For direct replacement of the discontinued SN74LVC245APWRG4, the SN74LVC245APWR from Texas Instruments is the primary recommended substitute. This part maintains identical electrical specifications, package form factor, and operating temperature range while offering active product status with substantial inventory availability (45,300 units). The difference between APWRG4 and APWR variants is packaging designation only, with no functional electrical differences.

Secondary alternatives include SN74LVC245APWRG3 and SN74LVC245APWT, both Texas Instruments parts with identical core specifications and active status. The 74LVCH series variants (SN74LVCH245APWR and SN74LVCH245APWT) provide equivalent functionality and are suitable for applications where the enhanced latch-up immunity of the LVCH series is beneficial.

The onsemi 74LCX245 series (74LCX245MTC and 74LCX245MTCX) are functionally compatible but operate with a reduced temperature range (-40°C to 85°C) and higher minimum supply voltage (2.0V versus 1.65V). These parts are appropriate only for applications operating within these narrower specifications.

Nexperia parts present trade-offs: the 74LVC245APW,118 from NXP Semiconductors maintains full compatibility with identical specifications and high inventory (190,454 units), while the Nexperia USA Inc. variant of the same part number is active but with lower inventory. The 74LVC2245APW,118 features reduced output current (12mA) and should be selected only when lower drive capability is acceptable. The 74LVC245APW,112 from Nexperia USA Inc. is obsolete and should be avoided for new designs.

Frequently Asked Questions (FAQ)

Q: Can I use the onsemi 74LCX245 series as a direct replacement?

A: The 74LCX245MTC and 74LCX245MTCX are functionally compatible in the 20-TSSOP package with matching output current and logic type. However, they operate with a minimum supply voltage of 2.0V (versus 1.65V for the original) and a reduced operating temperature range of -40°C to 85°C (versus -40°C to 125°C). Use these parts only if your application operates within these narrower specifications.

Q: What is the difference between SN74LVC245APWR and SN74LVC245APWRG3?

A: Both parts are electrically identical with matching specifications. The difference lies in packaging designation: APWR uses Cut Tape and Digi-Reel packaging, while APWRG3 uses Tape & Reel packaging. Select based on your procurement and assembly requirements.

Q: Why does the Nexperia 74LVC2245APW,118 have lower output current?

A: The 74LVC2245 is a different base product number within the 74LVC family, featuring integrated current-limiting output drivers (12mA versus 24mA). This part is suitable only for applications where reduced output drive capability is acceptable.

Q: Is the 74LVC245APW,112 from Nexperia USA Inc. suitable for new designs?

A: No. This part is marked as obsolete and should not be selected for new designs. Use the active alternatives listed in this reference instead.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference maintain RoHS3 compliance and MSL Level 1 (unlimited moisture sensitivity), matching the original SN74LVC245APWRG4 specifications.

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