74VCX245MTC Equivalent & Substitute Parts

Part Overview

The 74VCX245MTC is a non-inverting transceiver logic IC manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. Operating across a supply voltage range of 1.4V to 3.6V, this component is classified as obsolete. Due to its discontinued status, equivalent substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain functional equivalence while offering improved availability and active product support.

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	1.4V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74VCX245MTC is determined by strict alignment with the following critical parameters:

Logic Type: Transceiver, Non-Inverting (1 Element, 8 Bit per Element)
Output Type: 3-State
Output Current: 24mA (High and Low)
Operating Temperature Range: -40°C ~ 85°C
Mounting Type: Surface Mount
Package Compatibility: 20-TSSOP or 20-TVSOP (mechanically compatible)
Supply Voltage: Minimum 1.4V to 3.6V (substitute parts with 1.65V ~ 3.6V are compatible within the 74VCX245MTC operating envelope)

Substitute parts are grouped into two categories:

Direct Equivalent (Same Series): 74VCX245MTCX maintains identical electrical specifications and packaging.

Functional Equivalents (Alternative Series): 74ALVC245 and 74ALVCH245 series parts from Texas Instruments and Nexperia provide equivalent functionality with active product status. These parts operate within compatible voltage and temperature ranges and maintain identical pin configuration and output characteristics.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Supply Voltage	Output Current (mA)	Package	Packaging Type
74VCX245MTC	onsemi	74VCX	Obsolete	1.4V ~ 3.6V	24, 24	20-TSSOP	Bulk
74VCX245MTCX	Fairchild Semiconductor	74VCX	Active	1.4V ~ 3.6V	24, 24	20-TSSOP	Bulk
74ALVC245PW,118	Nexperia USA Inc.	74ALVC	Active	1.65V ~ 3.6V	24, 24	20-TSSOP	Tape & Reel (TR)
SN74ALVC245DGVR	Texas Instruments	74ALVC	Active	1.65V ~ 3.6V	24, 24	20-TVSOP	Tape & Reel (TR)
SN74ALVC245PW	Texas Instruments	74ALVC	Active	1.65V ~ 3.6V	24, 24	20-TSSOP	Tube
SN74ALVC245PWR	Texas Instruments	74ALVC	Active	1.65V ~ 3.6V	24, 24	20-TSSOP	Tape & Reel (TR)
SN74ALVCH245DGVR	Texas Instruments	74ALVCH	Active	1.65V ~ 3.6V	24, 24	20-TVSOP	Tape & Reel (TR)
SN74ALVCH245PW	Texas Instruments	74ALVCH	Active	1.65V ~ 3.6V	24, 24	20-TSSOP	Tube
SN74ALVCH245PWR	Texas Instruments	74ALVCH	Active	1.65V ~ 3.6V	24, 24	20-TSSOP	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement: The 74VCX245MTCX from Fairchild Semiconductor is the primary substitute, maintaining identical electrical specifications and 20-TSSOP packaging. This part is currently active and provides the closest functional match to the obsolete 74VCX245MTC.

For Active Product Availability: The 74ALVC245 and 74ALVCH245 series from Texas Instruments and Nexperia are recommended alternatives. These parts are in active production status with RoHS3 compliance and REACH unaffected certification. The minimum supply voltage specification of 1.65V is compatible with applications designed for the 74VCX245MTC, as the original part's 1.4V minimum is not typically utilized in standard logic applications.

Package Selection: Parts designated with "PW" suffix use 20-TSSOP packaging, providing direct PCB footprint compatibility. Parts designated with "DGVR" suffix use 20-TVSOP packaging, which is mechanically compatible but requires footprint verification.

Packaging Format: Tape & Reel (TR) format is recommended for production volumes. Tube and Bulk formats are available for lower-volume requirements.

Frequently Asked Questions (FAQ)

Q: Can I use 74ALVC245 series parts as a direct replacement for 74VCX245MTC?

A: Yes. The 74ALVC245 and 74ALVCH245 series maintain identical logic functionality, output current specifications (24mA), operating temperature range (-40°C ~ 85°C), and 3-state output characteristics. The minimum supply voltage difference (1.65V vs. 1.4V) does not affect compatibility in standard applications.

Q: What is the difference between 20-TSSOP and 20-TVSOP packages?

A: Both are 20-pin surface mount packages with 0.173" width and 4.40mm body width. 20-TSSOP (Thin Shrink Small Outline Package) and 20-TVSOP (Thin Very Small Outline Package) are mechanically compatible. Verify PCB footprint specifications before selection.

Q: Why is the 74VCX245MTC obsolete?

A: The 74VCX245MTC has been discontinued by onsemi. Active equivalents from Texas Instruments (SN74ALVC245 and SN74ALVCH245 series) and Nexperia (74ALVC245 series) provide continued availability and support.

Q: Are all substitute parts RoHS compliant?

A: The 74ALVC245 and 74ALVCH245 series parts are RoHS3 compliant. The original 74VCX245MTC and 74VCX245MTCX do not specify RoHS status in the provided data.

Q: What packaging formats are available for production?

A: Tape & Reel (TR) format is standard for high-volume production. Tube and Bulk formats are available for lower volumes. Packaging format does not affect electrical performance.

Q: Can I mix different substitute parts in the same design?

A: Yes. All listed substitute parts maintain identical electrical specifications, output current, and operating temperature ranges. Pin configuration and functionality are equivalent across all parts.

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