74VCXH245WMX Equivalent & Substitute Parts

Part Overview

The 74VCXH245WMX is a non-inverting transceiver logic IC manufactured by onsemi, designed for 8-bit data bus applications with 3-state output capability. This component operates across a supply voltage range of 1.2V to 3.6V and is housed in a 20-SOIC package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	74VCXH245WMX
Manufacturer	onsemi
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 ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 74VCXH245WMX is determined by the following critical parameters:

Logic type: Non-inverting transceiver configuration
Bit width: 8 bits per element
Output configuration: 3-state output
Output current capability: 24mA minimum for both high and low states
Package type: 20-SOIC form factor
Operating temperature range: -40°C to 85°C
Supply voltage compatibility: Parts must support the required voltage range

The substitute parts identified below maintain these core electrical and mechanical specifications, ensuring functional compatibility in existing designs. Differences in supply voltage range (1.65V minimum vs. 1.2V minimum) and product status (active vs. obsolete) are noted but do not preclude substitution in applications operating within the overlapping voltage window.

Parameter Comparison

Parameter	74VCXH245WMX (onsemi)	74ALVC245D,118 (NXP USA Inc.)	SN74ALVCH245DWR (Texas Instruments)	SN74ALVCH245DW (Texas Instruments)
Logic Type	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Output Type	3-State	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	1.2V ~ 3.6V	1.65V ~ 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)	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete	Active	Active	Active
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the 74VCXH245WMX within the overlapping supply voltage range of 1.65V to 3.6V. Selection among these alternatives should be based on the following criteria:

SN74ALVCH245DWR (Texas Instruments) is the primary direct substitute, offering identical electrical specifications, package configuration, and RoHS3 compliance. This part is supplied in Tape & Reel format and carries unlimited moisture sensitivity level rating.

SN74ALVCH245DW (Texas Instruments) provides the same electrical and mechanical compatibility as the DWR variant, with the distinction of Tube packaging. This option is suitable for applications where reel format is not required.

74ALVC245D,118 (NXP USA Inc.) maintains full electrical compatibility and is supplied in Bulk packaging. This part represents an alternative source for the same functional specification.

All substitute parts are currently in active production status, ensuring long-term availability compared to the obsolete 74VCXH245WMX. Applications operating at supply voltages below 1.65V require retention of the original 74VCXH245WMX or design modification to accommodate the higher minimum voltage threshold of the substitute parts.

Frequently Asked Questions (FAQ)

Q: Can the 74ALVC245D,118 directly replace the 74VCXH245WMX in all applications?

A: The 74ALVC245D,118 is electrically compatible for applications operating within the 1.65V to 3.6V supply voltage range. If your design operates below 1.65V, the original 74VCXH245WMX is required. The package and pin configuration are identical, enabling direct PCB substitution.

Q: What is the difference between SN74ALVCH245DWR and SN74ALVCH245DW?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format: DWR is supplied in Tape & Reel configuration, while DW is supplied in Tube format. Select based on your procurement and assembly process requirements.

Q: Are all substitute parts RoHS compliant?

A: The Texas Instruments variants (SN74ALVCH245DWR and SN74ALVCH245DW) are RoHS3 compliant. The NXP part (74ALVC245D,118) compliance status is not specified in the provided data.

Q: Does the minimum supply voltage difference affect pin compatibility?

A: No. All parts share identical pinout and 20-SOIC package dimensions. The voltage difference affects only the minimum operating voltage specification. Designs operating at 1.65V or higher can use any substitute without PCB modification.

Q: Which substitute offers the best long-term availability?

A: All three substitute parts are in active production status. Texas Instruments and NXP are established suppliers with broad distribution networks, ensuring consistent availability for both immediate and future procurement needs.

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