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74LCXZ245WM Equivalent & Substitute Parts
Part Overview
The 74LCXZ245WM is a non-inverting transceiver 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 at 2.7V to 3.6V supply voltage with 24mA output current capability. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts maintain the core transceiver functionality while offering improved availability, extended operating ranges, or active product status.
Substiute Parts
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 | 2.7V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| 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 74LCXZ245WM is determined by the following critical parameters:
- Logic Type: Transceiver, Non-Inverting (mandatory match)
- Number of Elements: 1 (mandatory match)
- Number of Bits per Element: 8 (mandatory match)
- Output Type: 3-State (mandatory match)
- Output Current: 24mA minimum for both high and low states
- Package / Case: 20-SOIC form factor (mechanical compatibility)
- Supply Voltage Range: Must encompass or exceed 2.7V ~ 3.6V
- Operating Temperature: Must support -40°C minimum and 85°C maximum
Substitute parts are grouped into two categories based on supply voltage compatibility:
Category A - Direct Voltage Range Match (2.7V ~ 3.6V): Parts with supply voltage specifications that directly match or narrow the 74LCXZ245WM range, suitable for designs with strict 3.3V operation requirements.
Category B - Extended Voltage Range (2V ~ 5.5V or 1.2V ~ 3.6V): Parts with broader supply voltage specifications, offering greater design flexibility and compatibility with mixed-voltage systems while maintaining operation within the 2.7V ~ 3.6V window.
Parameter Comparison
| Part Number | Manufacturer | Series | Supply Voltage | Operating Temperature | Package | Output Current (mA) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| 74LCXZ245WM | onsemi | 74LCXZ | 2.7V ~ 3.6V | -40°C ~ 85°C | 20-SOIC | 24, 24 | Obsolete | N/A |
| MC74LCX245DWG | onsemi | 74LCX | 2V ~ 5.5V | -55°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| MC74LCX245DWR2G | onsemi | 74LCX | 2V ~ 5.5V | -55°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| 74LVC245AD,118 | Nexperia USA Inc. | 74LVC | 1.2V ~ 3.6V | -40°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| 74LVCH245AD,118 | Nexperia USA Inc. | 74LVCH | 1.2V ~ 3.6V | -40°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| SN74LVC245ADW | Texas Instruments | 74LVC | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| SN74LVC245ADWR | Texas Instruments | 74LVC | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| SN74LVC245ANS | Texas Instruments | 74LVC | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| SN74LVC245ANSR | Texas Instruments | 74LVC | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| SN74LVCH245ADW | Texas Instruments | 74LVCH | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
| SN74LVCH245ADWR | Texas Instruments | 74LVCH | 1.65V ~ 3.6V | -40°C ~ 125°C | 20-SOIC | 24, 24 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
All listed substitute parts maintain functional equivalence to the 74LCXZ245WM through identical logic type, element count, bit width, output type, and output current specifications. Selection should prioritize active product status and compliance certifications.
For 3.3V-only applications: MC74LCX245DWG and MC74LCX245DWR2G from onsemi provide direct voltage range compatibility (2V ~ 5.5V encompasses 3.3V operation) with active product status and ROHS3 compliance. These parts are available in high inventory quantities.
For mixed-voltage or low-voltage systems: SN74LVC245ADWR, SN74LVC245ANSR, SN74LVCH245ADWR, and 74LVC245AD,118 support extended lower voltage limits (1.2V to 1.65V minimum) while maintaining 3.6V maximum compatibility. All are ROHS3 compliant with active product status.
For temperature-extended applications: All substitute parts support -40°C to 125°C operating range, exceeding the 74LCXZ245WM specification of -40°C to 85°C.
Packaging considerations: All substitute parts are available in 20-SOIC surface mount packages. Verify specific packaging options (Tube, Cut Tape, Tape & Reel) match procurement requirements.
Frequently Asked Questions (FAQ)
Q: Can I directly replace 74LCXZ245WM with any of these substitutes?
A: Yes, all listed parts are functionally equivalent. They share identical logic type (non-inverting transceiver), element count (1), bit width (8), output type (3-state), and output current (24mA). Verify supply voltage and temperature requirements match your application before selection.
Q: What is the difference between the onsemi MC74LCX245 variants and Texas Instruments SN74LVC245 variants?
A: Both series provide equivalent functionality. The MC74LCX245 series operates at 2V ~ 5.5V, while SN74LVC245 operates at 1.65V ~ 3.6V. Both support the 2.7V ~ 3.6V range of the original 74LCXZ245WM. Selection depends on supply voltage requirements and preferred manufacturer.
Q: Why do some substitutes have lower minimum supply voltages (1.2V or 1.65V)?
A: Extended lower voltage specifications provide design flexibility for mixed-voltage systems. These parts remain fully compatible with 3.3V operation and offer additional functionality for low-power applications. The 74LCXZ245WM minimum of 2.7V is still supported.
Q: Are all substitutes ROHS3 compliant?
A: All listed substitute parts are ROHS3 compliant. The original 74LCXZ245WM does not specify RoHS status due to its obsolete status.
Q: What packaging options are available for these substitutes?
A: Substitute parts are available in multiple packaging formats: Tube, Cut Tape (CT), Cut Tape with Digi-Reel, and Tape & Reel (TR). Verify the specific packaging variant matches your procurement and assembly requirements.
Q: Can I use SN74LVCH245 series instead of SN74LVC245 series?
A: Yes. Both series are functionally equivalent with identical electrical specifications for this application. The LVCH designation indicates advanced low-voltage CMOS technology. Selection can be based on availability, pricing, or preferred manufacturer.
Q: What is the Moisture Sensitivity Level (MSL) for substitute parts?
A: onsemi MC74LCX245 variants specify MSL 3 (168 hours). Nexperia and Texas Instruments parts specify MSL 1 (Unlimited). MSL 1 provides superior moisture tolerance for storage and handling.
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