74VCXH245MTC Equivalent & Substitute Parts

Part Overview

The 74VCXH245MTC is a non-inverting transceiver 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-TSSOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74VCXH245MTC

onsemiIn Stock: 221074VCXH245MTC Datasheet

Current PartRFQ

SN74ALVCH245PW

Texas InstrumentsIn Stock: 1234SN74ALVCH245PW Datasheet

SimilarRFQ

SN74ALVCH245PWR

Texas InstrumentsIn Stock: 2214SN74ALVCH245PWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74VCXH245MTC is determined by strict alignment with the following critical parameters:

• Logic function: Non-inverting transceiver with 1 element, 8 bits per element
• Output configuration: 3-state output
• Output current capability: 24mA high and low
• Package type: 20-TSSOP surface mount
• Operating temperature range: -40°C to 85°C
• Pin count and pinout compatibility: 20-pin TSSOP

The substitute parts identified below maintain functional and physical compatibility across all these parameters. Voltage supply range differences are noted but do not preclude substitution where the operating voltage of the application falls within the overlap range of both parts.

Parameter Comparison

Engineering Selection Recommendations

Both SN74ALVCH245PW and SN74ALVCH245PWR are active product alternatives manufactured by Texas Instruments. These parts maintain full functional and pinout compatibility with the obsolete 74VCXH245MTC across all critical electrical and mechanical parameters.

The primary distinction between the two Texas Instruments alternatives is packaging format: SN74ALVCH245PW is supplied in tube packaging, while SN74ALVCH245PWR is supplied in tape and reel format. Selection between these two should be based on procurement and assembly requirements rather than electrical performance.

The minimum supply voltage specification differs between the original part (1.2V minimum) and the substitutes (1.65V minimum). Applications operating below 1.65V require verification that the 74VCXH245MTC minimum voltage specification is a functional requirement rather than a design margin specification. For applications within the 1.65V to 3.6V range, the Texas Instruments alternatives provide equivalent performance with the added benefit of active product status and RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can SN74ALVCH245PW and SN74ALVCH245PWR be used interchangeably?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format only: tube versus tape and reel. Selection depends on assembly and procurement workflow requirements.

Q: What is the impact of the different minimum supply voltage specifications?

A: The 74VCXH245MTC operates from 1.2V minimum, while the Texas Instruments substitutes operate from 1.65V minimum. If your application operates at voltages below 1.65V, the original part specification must be retained. For applications within the 1.65V to 3.6V overlap range, substitution is valid.

Q: Are the pinouts identical between the 74VCXH245MTC and substitute parts?

A: Yes. All three parts use the 20-TSSOP package with identical pin assignments and functional pinout. Direct PCB substitution is supported without layout modification.

Q: What compliance advantages do the substitute parts offer?

A: The Texas Instruments alternatives carry active product status and RoHS3 compliance certification. The original onsemi part is obsolete. For new designs or long-term supply assurance, the active alternatives are preferred.

Q: Are there inventory considerations for these substitutes?

A: Current inventory shows 1,175 units of SN74ALVCH245PW (tube) and 2,200 units of SN74ALVCH245PWR (tape and reel) available as new original stock. The tape and reel variant has higher current availability.