74VCX16240MTDX Equivalent & Substitute Parts

Part Overview

The 74VCX16240MTDX is a Buffer, Inverting logic IC manufactured by onsemi, featuring 4 elements with 4 bits per element and 3-state output capability. This device operates across a supply voltage range of 1.2V to 3.6V and is housed in a 48-TSSOP package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	74VCX16240MTDX
Manufacturer	onsemi
Logic Type	Buffer, Inverting
Number of Elements	4
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	1.2V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74VCX16240MTDX are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Functional Parameters:

Logic Type: Buffer, Inverting (4 elements, 4 bits per element)
Output Type: 3-State
Output Current: 24mA (High and Low)
Operating Temperature Range: -40°C ~ 85°C (TA)

Electrical Parameters:

Supply Voltage Range: Must encompass or overlap with 1.2V ~ 3.6V
Package Type: 48-pin TSSOP/SSOP configuration

Mechanical Parameters:

Mounting Type: Surface Mount
Package Footprint: 48-TFSOP or 48-BSSOP

The identified substitute parts maintain identical functional specifications and are manufactured by Texas Instruments under the 74ALVCH series. These alternatives provide active product status with enhanced compliance certifications, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Parameter	74VCX16240MTDX (onsemi)	SN74ALVCH16240DGGR (TI)	SN74ALVCH16240DL (TI)
Logic Type	Buffer, Inverting	Buffer, Inverting	Buffer, Inverting
Number of Elements	4	4	4
Number of Bits per Element	4	4	4
Output Type	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	1.2V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	48-TFSOP (0.240", 6.10mm Width)	48-TFSOP (0.240", 6.10mm Width)	48-BSSOP (0.295", 7.50mm Width)
Product Status	Obsolete	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both SN74ALVCH16240DGGR and SN74ALVCH16240DL are qualified substitutes for the obsolete 74VCX16240MTDX based on functional equivalence and active product status.

SN74ALVCH16240DGGR (Tape & Reel packaging):

Maintains identical package footprint (48-TFSOP, 0.240" width)
Active product status with ROHS3 compliance
Suitable for high-volume production environments

SN74ALVCH16240DL (Tube packaging):

Larger package footprint (48-BSSOP, 0.295" width) requires PCB layout verification
Active product status with ROHS3 compliance
Suitable for lower-volume or prototype applications

Both alternatives operate within the supply voltage range of the original part (1.65V ~ 3.6V overlaps with 1.2V ~ 3.6V) and maintain identical output current specifications and temperature operating range. Selection between these two substitutes depends on packaging format requirements and PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can SN74ALVCH16240DGGR and SN74ALVCH16240DL be used interchangeably with 74VCX16240MTDX?

A: Both parts are functionally equivalent in logic operation, output current, and temperature range. The primary difference is package footprint: SN74ALVCH16240DGGR uses 48-TFSOP (0.240" width) matching the original, while SN74ALVCH16240DL uses 48-BSSOP (0.295" width). PCB layout compatibility must be verified before substitution.

Q: What is the difference between the two Texas Instruments substitutes?

A: SN74ALVCH16240DGGR is supplied in Tape & Reel format with identical package dimensions to the original part. SN74ALVCH16240DL is supplied in Tube format with a wider package body. Both maintain identical electrical specifications and active product status.

Q: Is the supply voltage range difference significant?

A: The original 74VCX16240MTDX operates at 1.2V ~ 3.6V, while both substitutes operate at 1.65V ~ 3.6V. The substitute parts do not support operation below 1.65V. If your application requires operation at voltages below 1.65V, these substitutes are not compatible.

Q: Are there any compliance differences between the original and substitute parts?

A: Both substitute parts are ROHS3 compliant and REACH unaffected, providing enhanced environmental compliance compared to the obsolete original part. All three parts share identical MSL rating of 1 (Unlimited).

Q: Which substitute should I select for new designs?

A: For new designs, SN74ALVCH16240DGGR is recommended due to package footprint compatibility with existing designs and active product status. If PCB layout allows for the larger footprint, SN74ALVCH16240DL is equally valid.

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