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74HCT240PW,118 Equivalent & Substitute Parts
Part Overview
The 74HCT240PW,118 is a high-speed CMOS logic buffer IC manufactured by Nexperia USA Inc. It functions as an inverting buffer with 2 elements, 4 bits per element, and 3-state output capability. The device operates at 5.5V supply voltage and is housed in a 20-TSSOP surface mount package. This part is currently in active product status with 2905 units in stock. Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when sourcing from different manufacturers is preferred for supply chain optimization.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74HCT240PW,118 |
| Manufacturer | Nexperia USA Inc. |
| Logic Type | Buffer, Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Output Type | 3-State |
| Current - Output High, Low | 6mA, 6mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the 74HCT240PW,118 are qualified based on the following criteria:
Electrical Compatibility: All substitute parts maintain the same logic type (Buffer, Inverting), element configuration (2 elements, 4 bits per element), output type (3-State), and supply voltage range (4.5V ~ 5.5V). Output current specifications remain at 6mA for high and low states across all primary substitutes.
Mechanical Compatibility: All substitute parts use the identical 20-TSSOP package format with 0.173" width and 4.40mm dimensions, ensuring pin-for-pin compatibility and identical PCB footprints.
Functional Equivalence: All parts belong to the 74HCT logic series and perform identical buffer inversion functions with matching pin configurations.
Packaging Variations: Substitutes are available in different packaging formats (Tube, Bulk, Cut Tape & Digi-Reel, Tape & Reel) to accommodate different procurement and assembly requirements.
Temperature and Compliance: Operating temperature ranges vary slightly among manufacturers. All parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity level remains at MSL 1 (Unlimited) for primary substitutes.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Logic Type | Output Current (mA) | Supply Voltage | Operating Temperature (°C) | Package | Product Status | Packaging Format |
|---|---|---|---|---|---|---|---|---|
| 74HCT240PW,118 | Nexperia USA Inc. | Buffer, Inverting | 6, 6 | 4.5V ~ 5.5V | -40 ~ 125 | 20-TSSOP | Active | Tape & Reel (TR) |
| CD74HCT240PW | Texas Instruments | Buffer, Inverting | 6, 6 | 4.5V ~ 5.5V | -55 ~ 125 | 20-TSSOP | Last Time Buy | Tube |
| CD74HCT240PWT | National Semiconductor | Buffer, Inverting | 6, 6 | 4.5V ~ 5.5V | -55 ~ 125 | 20-TSSOP | Active | Bulk |
| MM74HCT240MTCX | Fairchild Semiconductor | Buffer, Inverting | 7.2, 7.2 | 4.5V ~ 5.5V | -40 ~ 85 | 20-TSSOP | Active | Not specified |
| SN74HCT240PW | Texas Instruments | Buffer, Inverting | 6, 6 | 4.5V ~ 5.5V | -40 ~ 85 | 20-TSSOP | Discontinued at DiGi Electronics | Tube |
| SN74HCT240PWR | Texas Instruments | Buffer, Inverting | 6, 6 | 4.5V ~ 5.5V | -40 ~ 85 | 20-TSSOP | Active | Cut Tape (CT) & Digi-Reel® |
| SN74HCT240PWT | Texas Instruments | Buffer, Inverting | 6, 6 | 4.5V ~ 5.5V | -40 ~ 85 | 20-TSSOP | Discontinued at DiGi Electronics | Tape & Reel (TR) |
Engineering Selection Recommendations
Primary Substitutes (Recommended): CD74HCT240PWT (National Semiconductor) and SN74HCT240PWR (Texas Instruments) are the preferred substitutes. Both maintain identical electrical specifications to the 74HCT240PW,118, including 6mA output current and 4.5V ~ 5.5V supply voltage range. CD74HCT240PWT is in active product status with 3644 units in stock. SN74HCT240PWR is also active with 65880 units available, providing superior supply chain availability.
Extended Temperature Range Option: CD74HCT240PW (Texas Instruments) offers an extended operating temperature range of -55°C ~ 125°C compared to the primary part's -40°C ~ 125°C. This part is in Last Time Buy status with 1655 units in stock, suitable for applications requiring lower temperature operation.
Higher Output Current Alternative: MM74HCT240MTCX (Fairchild Semiconductor) provides increased output current of 7.2mA for both high and low states, compared to 6mA in the primary part. This part is active with 6719 units in stock. However, its operating temperature range is limited to -40°C ~ 85°C, which is narrower than the primary part.
Discontinued Parts: SN74HCT240PW and SN74HCT240PWT are discontinued at DiGi Electronics and should not be selected for new designs, though existing inventory may be available through alternative channels.
Packaging Considerations: Select substitute parts based on procurement requirements. Tape & Reel format (74HCT240PW,118, SN74HCT240PWT) suits high-volume automated assembly. Cut Tape & Digi-Reel (SN74HCT240PWR) accommodates medium-volume production. Tube and Bulk formats support lower-volume or manual assembly operations.
Frequently Asked Questions (FAQ)
Q: Can I use MM74HCT240MTCX as a direct replacement for 74HCT240PW,118?
A: MM74HCT240MTCX is electrically compatible in terms of logic function, package, and supply voltage. However, it has higher output current (7.2mA vs. 6mA) and a narrower operating temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C). Use this part only if your application does not require operation above 85°C and can tolerate higher output current.
Q: What is the difference between the various Texas Instruments 74HCT240 variants?
A: SN74HCT240PW, SN74HCT240PWR, and SN74HCT240PWT are all Texas Instruments parts with identical electrical specifications (6mA output current, -40°C ~ 85°C operating range). The differences are in packaging format: PW is Tube, PWR is Cut Tape & Digi-Reel, and PWT is Tape & Reel. SN74HCT240PW and SN74HCT240PWT are discontinued at DiGi Electronics; SN74HCT240PWR remains active.
Q: Are all substitute parts ROHS3 compliant?
A: CD74HCT240PW, CD74HCT240PWT, SN74HCT240PW, SN74HCT240PWR, and SN74HCT240PWT are all ROHS3 compliant. MM74HCT240MTCX compliance information is not provided in the available data.
Q: Which substitute offers the best supply chain availability?
A: SN74HCT240PWR (Texas Instruments) offers the highest inventory with 65880 units in stock and active product status. This part is suitable for applications requiring reliable long-term availability.
Q: Can I mix different manufacturers' parts in the same design?
A: Yes. All substitute parts maintain identical pin configurations, package dimensions, and core electrical specifications (logic type, element count, output type, supply voltage). They are functionally interchangeable within the constraints of their individual operating temperature ranges and output current ratings.
Q: What should I consider when selecting between packaging formats?
A: Tape & Reel format is optimized for high-volume automated pick-and-place assembly. Cut Tape & Digi-Reel suits medium-volume production with flexibility in quantity. Tube and Bulk formats are appropriate for lower-volume or manual assembly operations. All formats contain the same die and provide identical electrical performance.
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