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74VCX2245WMX Equivalent & Substitute Parts
Part Overview
The 74VCX2245WMX 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 housed in a 20-SOIC package suitable for surface mount applications. The product is currently classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines to ensure design continuity and procurement availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74VCX2245WMX |
| 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; 12mA, 12mA |
| Voltage - Supply | 1.4V ~ 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 of the 74VCX2245WMX is determined by the following critical parameters:
- Logic Function: Non-inverting transceiver with 1 element, 8 bits per element, and 3-state output capability
- Electrical Compatibility: Supply voltage range, output current specifications, and operating temperature range
- Package Compatibility: 20-SOIC surface mount package with identical physical dimensions
- Functional Equivalence: Identical pin configuration and signal behavior
All substitute parts listed maintain these core parameters. The primary distinction among substitutes is the minimum supply voltage specification (1.65V for active alternatives versus 1.4V for the obsolete 74VCX2245WMX) and product status (active versus obsolete). This voltage difference is non-critical for most applications operating at standard logic levels (3.3V or 5V).
Parameter Comparison
| Parameter | 74VCX2245WMX (onsemi) | 74ALVC245D,118 (NXP) | SN74ALVC245DW (TI) | SN74ALVC245DWR (TI) | SN74ALVCH245DW (TI) | SN74ALVCH245DWR (TI) |
|---|---|---|---|---|---|---|
| Manufacturer | onsemi | NXP USA Inc. | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| Logic Type | Transceiver, Non-Inverting | Transceiver, Non-Inverting | Transceiver, Non-Inverting | Transceiver, Non-Inverting | Transceiver, Non-Inverting | Transceiver, Non-Inverting |
| Number of Elements | 1 | 1 | 1 | 1 | 1 | 1 |
| Number of Bits per Element | 8 | 8 | 8 | 8 | 8 | 8 |
| Output Type | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State |
| Current - Output High, Low | 24mA, 24mA; 12mA, 12mA | 24mA, 24mA | 24mA, 24mA | 24mA, 24mA | 24mA, 24mA | 24mA, 24mA |
| Voltage - Supply | 1.4V ~ 3.6V | 1.65V ~ 3.6V | 1.65V ~ 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) | -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) | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | Not specified | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | Not specified | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
All listed substitute parts are functionally equivalent to the 74VCX2245WMX and suitable for direct replacement in applications operating at standard logic supply voltages (3.3V or 5V). Selection among substitutes should be based on the following criteria:
Product Status: All substitute parts are classified as active products, ensuring long-term availability and supply chain continuity compared to the obsolete 74VCX2245WMX.
Compliance and Certifications: The Texas Instruments variants (SN74ALVC245DW, SN74ALVC245DWR, SN74ALVCH245DW, SN74ALVCH245DWR) carry ROHS3 compliance certification, meeting environmental regulatory requirements for new designs. The NXP 74ALVC245D,118 does not specify RoHS status in the provided data.
Packaging Options: Texas Instruments offers both tube (DW suffix) and tape & reel (DWR suffix) packaging options. The NXP part is supplied in bulk packaging. Selection depends on assembly process requirements and order quantities.
Supply Voltage Consideration: All substitutes specify a minimum supply voltage of 1.65V compared to 1.4V for the original part. This difference is not significant for standard logic applications but should be verified for ultra-low-voltage designs.
Frequently Asked Questions (FAQ)
Q: Can the 74VCX2245WMX be directly replaced with any of the listed substitutes?
A: Yes. All listed parts maintain identical logic function, pin configuration, output characteristics, and package specifications. Direct pin-for-pin replacement is supported without circuit modification.
Q: What is the significance of the minimum supply voltage difference (1.4V versus 1.65V)?
A: The 74VCX2245WMX supports operation down to 1.4V, while all substitutes specify 1.65V minimum. For applications operating at 3.3V, 5V, or other standard logic levels, this difference is not functionally relevant. Applications requiring operation below 1.65V would require design review.
Q: Are there differences between the 74ALVC and 74ALVCH series substitutes?
A: Both series are non-inverting transceivers with identical electrical specifications and package form factors. The distinction between series designations reflects internal design variations by Texas Instruments but does not affect functional compatibility or electrical performance for this application.
Q: What packaging options are available for the substitute parts?
A: Texas Instruments provides tube packaging (DW suffix) and tape & reel packaging (DWR suffix). NXP supplies the 74ALVC245D,118 in bulk packaging. Selection should align with manufacturing assembly processes and order volume requirements.
Q: Are all substitute parts RoHS compliant?
A: The Texas Instruments variants carry ROHS3 compliance certification. The NXP part does not specify RoHS status in the provided documentation. For designs requiring RoHS compliance, Texas Instruments parts are the recommended choice.
Q: What inventory levels are available for each substitute?
A: Current stock levels are: 74ALVC245D,118 (NXP) - 9086 pcs; SN74ALVC245DW (TI) - 1555 pcs; SN74ALVC245DWR (TI) - 2200 pcs; SN74ALVCH245DW (TI) - 1285 pcs; SN74ALVCH245DWR (TI) - 2871 pcs. Inventory levels should be confirmed with suppliers for current availability.
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