SN74LVC240APWRE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC240APWRE4 is a logic buffer IC manufactured by Texas Instruments, featuring inverting 2-element, 4-bit per element architecture with 3-state output capability in a 20-TSSOP surface mount package. This part is discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74LVC240APWRE4
Manufacturer	Texas Instruments
Series	74LVC
Logic Type	Buffer, Inverting
Number of Elements	2
Number of Bits per Element	4
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

Substitute parts for the SN74LVC240APWRE4 are classified based on strict electrical and mechanical parameter compatibility. The critical parameters determining substitution eligibility are:

Logic Type: Buffer, Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Current - Output High, Low: 24mA, 24mA
Package / Case: 20-TSSOP
Mounting Type: Surface Mount

Parametric equivalents maintain identical electrical specifications and package dimensions. Manufacturer-recommended alternatives may have minor voltage supply range or operating temperature variations while preserving functional compatibility within the specified parameter set.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Supply	Operating Temperature	Current - Output (High/Low)	Package	Product Status	Inventory
SN74LVC240APWRE4	Texas Instruments	74LVC	1.65V ~ 3.6V	-40°C ~ 125°C	24mA, 24mA	20-TSSOP	Discontinued at DiGi Electronics	961 Pcs
SN74LVC240APWR	Texas Instruments	74LVC	1.65V ~ 3.6V	-40°C ~ 125°C	24mA, 24mA	20-TSSOP	Active	7442 Pcs
SN74LVC240APWRG4	Texas Instruments	74LVC	1.65V ~ 3.6V	-40°C ~ 125°C	24mA, 24mA	20-TSSOP	Discontinued at DiGi Electronics	3300 Pcs
SN74LVC240APWT	Texas Instruments	74LVC	1.65V ~ 3.6V	-40°C ~ 125°C	24mA, 24mA	20-TSSOP	Active	1685 Pcs
74LCX240MTCX	Fairchild Semiconductor	74LCX	2V ~ 3.6V	-40°C ~ 85°C	24mA, 24mA	20-TSSOP	Active	23800 Pcs
74LVC240APW,118	NXP Semiconductors	74LVC	1.2V ~ 3.6V	-40°C ~ 125°C	24mA, 24mA	20-TSSOP	Active	42885 Pcs
MC74LCX240DTR2G	onsemi	74LCX	2V ~ 3.6V	-40°C ~ 85°C	24mA, 24mA	20-TSSOP	Active	3970 Pcs
74LVC240AT20-13	Diodes Incorporated	74LVC	1.65V ~ 3.6V	-40°C ~ 125°C	24mA, 24mA	20-TSSOP	Active	3234 Pcs

Engineering Selection Recommendations

For direct replacement of the discontinued SN74LVC240APWRE4, the SN74LVC240APWR from Texas Instruments is the primary parametric equivalent, maintaining identical electrical specifications and operating range with active product status and higher inventory availability.

The SN74LVC240APWT from Texas Instruments provides an alternative with identical parameters and active status, though with lower inventory levels.

The 74LVC240APW,118 from NXP Semiconductors offers extended lower voltage supply capability (1.2V minimum) while maintaining all other critical parameters and active product status with substantial inventory.

The 74LVC240AT20-13 from Diodes Incorporated provides parametric equivalence with identical voltage and temperature ranges and active status, suitable for applications requiring alternative sourcing.

The 74LCX240MTCX from Fairchild Semiconductor and MC74LCX240DTR2G from onsemi are manufacturer-recommended alternatives with reduced operating temperature range (-40°C to 85°C) and minimum voltage supply of 2V. These parts maintain identical output current specifications and package configuration, with significantly higher inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC240APWR be used as a direct replacement for SN74LVC240APWRE4?

A: Yes. Both parts share identical electrical specifications including voltage supply range (1.65V ~ 3.6V), operating temperature range (-40°C ~ 125°C), output current (24mA), and 20-TSSOP package configuration. The primary difference is product status and packaging format.

Q: What is the difference between 74LVC and 74LCX series parts?

A: The 74LCX series (Fairchild Semiconductor and onsemi variants) operates within a reduced voltage range (2V ~ 3.6V minimum) and narrower operating temperature range (-40°C ~ 85°C) compared to 74LVC series parts. Functional logic architecture and output current specifications remain identical.

Q: Is the 74LVC240APW,118 from NXP compatible with the original part?

A: Yes. This part maintains identical logic function, output current, package, and operating temperature range. The extended lower voltage supply capability (1.2V minimum versus 1.65V) provides additional design flexibility without compromising compatibility.

Q: What packaging format differences exist among substitute parts?

A: All substitute parts use the 20-TSSOP surface mount package with identical 0.173" width and 4.40mm dimensions. Packaging format variations (Tape & Reel, Bulk) affect procurement and handling but do not impact electrical or mechanical compatibility.

Q: Which substitute part offers the highest inventory availability?

A: The 74LVC240APW,118 from NXP Semiconductors provides the highest inventory level at 42,885 pieces, followed by the 74LCX240MTCX from Fairchild Semiconductor at 23,800 pieces.

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