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74LCXH245WM Equivalent & Substitute Parts
Part Overview
The 74LCXH245WM is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability in a 20-SOIC package. This component operates across a supply voltage range of 2V to 3.6V with output current ratings of 24mA for both high and low states. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74LCXH245WM |
| 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 | 2V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) |
| Product Status | Obsolete |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the 74LCXH245WM is determined by the following critical parameters:
Functional Equivalence: All substitute parts maintain the same logic type (Transceiver, Non-Inverting), element count (1), bit width (8 bits per element), and output configuration (3-State).
Electrical Compatibility: Substitute parts must support the 3.6V maximum supply voltage of the original part. Parts with extended voltage ranges (up to 5.5V) remain compatible as they encompass the original operating window.
Package Compatibility: The 20-SOIC package footprint is maintained across all substitutes, ensuring mechanical and electrical pin compatibility.
Output Current: All substitutes provide 24mA output current capability for both high and low states, matching the original specification.
Temperature Range: Substitute parts operate within or exceed the original temperature range of -40°C to 85°C.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Voltage - Supply | Operating Temperature | Package / Case | Current - Output High, Low | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| 74LCXH245WM | onsemi | Transceiver, Non-Inverting | 2V ~ 3.6V | -40°C ~ 85°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Obsolete | Not Specified |
| MC74LCX245DWG | onsemi | Transceiver, Non-Inverting | 2V ~ 5.5V | -55°C ~ 125°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| MC74LCX245DWR2G | onsemi | Transceiver, Non-Inverting | 2V ~ 5.5V | -55°C ~ 125°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| 74LVC245AD,118 | Nexperia USA Inc. | Transceiver, Non-Inverting | 1.2V ~ 3.6V | -40°C ~ 125°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| 74LVCH245AD,118 | Nexperia USA Inc. | Transceiver, Non-Inverting | 1.2V ~ 3.6V | -40°C ~ 125°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC245ADW | Texas Instruments | Transceiver, Non-Inverting | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC245ADWR | Texas Instruments | Transceiver, Non-Inverting | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC245ANS | Texas Instruments | Transceiver, Non-Inverting | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC (0.209", 5.30mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVC245ANSR | Texas Instruments | Transceiver, Non-Inverting | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC (0.209", 5.30mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVCH245ADW | Texas Instruments | Transceiver, Non-Inverting | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Active | ROHS3 Compliant |
| SN74LVCH245ADWR | Texas Instruments | Transceiver, Non-Inverting | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC (0.295", 7.50mm) | 24mA, 24mA | Active | ROHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts are functionally equivalent to the 74LCXH245WM and maintain electrical and mechanical compatibility. The primary distinction between substitutes lies in product status and compliance certifications.
Active Product Status: MC74LCX245DWG, MC74LCX245DWR2G, 74LVC245AD,118, 74LVCH245AD,118, SN74LVC245ADW, SN74LVC245ADWR, SN74LVC245ANS, SN74LVC245ANSR, SN74LVCH245ADW, and SN74LVCH245ADWR are all active products with ongoing manufacturer support and availability.
RoHS3 Compliance: All active substitute parts are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components.
Voltage Range Considerations: Substitutes from onsemi (MC74LCX series) support extended voltage operation up to 5.5V, providing additional design margin. Texas Instruments and Nexperia parts operate within the 1.65V to 3.6V or 1.2V to 3.6V ranges, which fully encompass the original 2V to 3.6V specification.
Temperature Range Extension: Active substitutes extend the upper operating temperature to 125°C compared to the original 85°C maximum, and lower minimum temperature to -55°C or -40°C, providing broader environmental compatibility.
Packaging Options: Substitutes are available in multiple packaging formats (Tube, Cut Tape, Tape & Reel) to accommodate different procurement and assembly workflows. Package case dimensions vary between 20-SOIC (0.209", 5.30mm Width) and 20-SOIC (0.295", 7.50mm Width), both maintaining electrical compatibility.
Frequently Asked Questions (FAQ)
Q: Can I directly replace the 74LCXH245WM with any of the listed substitutes?
A: Yes. All listed substitutes maintain identical logic functionality, output current specifications, and 20-SOIC package footprint. Electrical operation is compatible across the original 2V to 3.6V supply voltage range.
Q: What is the difference between the onsemi MC74LCX245 variants and the Texas Instruments SN74LVC245 variants?
A: Both series provide equivalent transceiver functionality with 3-state outputs and 24mA drive capability. The MC74LCX245 series supports extended voltage operation to 5.5V, while the SN74LVC245 series operates within 1.65V to 3.6V. Both are active products with full RoHS3 compliance.
Q: Are there package differences I should consider?
A: Yes. Most substitutes use the 20-SOIC (0.295", 7.50mm Width) package matching the original. However, SN74LVC245ANS and SN74LVC245ANSR use a narrower 20-SOIC (0.209", 5.30mm Width) package. Both are electrically equivalent but have different PCB footprints. Verify your board layout compatibility before selection.
Q: Why is the original 74LCXH245WM marked as obsolete?
A: The 74LCXH245WM is obsolete, but multiple active alternatives from major manufacturers (onsemi, Texas Instruments, Nexperia) provide identical functionality with improved compliance certifications and extended temperature ranges.
Q: What packaging options are available for procurement?
A: Substitutes are available in Tube, Cut Tape (CT), Cut Tape with Digi-Reel, and Tape & Reel (TR) formats. Selection depends on your assembly process and volume requirements.
Q: Do all substitutes meet current environmental regulations?
A: All active substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and distribution.
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