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74HCT244D,652 Equivalent & Substitute Parts
Part Overview
The 74HCT244D,652 is a non-inverting buffer logic integrated circuit manufactured by Nexperia USA Inc. in the 74HCT series. This device features 2 elements with 4 bits per element, 3-state output capability, and operates across a 4.5V to 5.5V supply voltage range. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74HCT244D,652 |
| Manufacturer | Nexperia USA Inc. |
| Logic Type | Buffer, Non-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-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the 74HCT244D,652 are qualified based on the following critical parameters:
- Logic Type: Buffer, Non-Inverting
- Number of Elements: 2
- Number of Bits per Element: 4
- Output Type: 3-State
- Voltage - Supply: 4.5V ~ 5.5V
- Package / Case: 20-SOIC (0.295", 7.50mm Width)
- Mounting Type: Surface Mount
All substitute parts listed maintain identical functional specifications and package footprint compatibility. Variations in operating temperature range, output current specifications, and product status are noted but do not affect functional interchangeability within the specified electrical parameters.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements | Bits/Element | Output Type | Current (mA) | Supply Voltage | Temp Range (°C) | Package | Product Status | RoHS |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 74HCT244D,652 | Nexperia USA Inc. | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -40 ~ 125 | 20-SOIC | Obsolete | ROHS3 |
| 74HCT244D,653 | Nexperia USA Inc. | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -40 ~ 125 | 20-SOIC | Active | ROHS3 |
| CD74HCT244M | Texas Instruments | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -55 ~ 125 | 20-SOIC | Discontinued | ROHS3 |
| CD74HCT244M96 | Texas Instruments | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -55 ~ 125 | 20-SOIC | Active | ROHS3 |
| MC74HCT244ADWG | onsemi | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -55 ~ 125 | 20-SOIC | Active | ROHS3 |
| MC74HCT244ADWR2G | onsemi | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -55 ~ 125 | 20-SOIC | Active | ROHS3 |
| MM74HCT244WM | Fairchild Semiconductor | Buffer, Non-Inverting | 2 | 4 | 3-State | 7.2, 7.2 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SOIC | Active | Not specified |
| MM74HCT244WMX | Fairchild Semiconductor | Buffer, Non-Inverting | 2 | 4 | 3-State | 7.2, 7.2 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SOIC | Active | Not specified |
| SN74HCT244ANSR | Texas Instruments | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SO | Active | ROHS3 |
| SN74HCT244DW | Texas Instruments | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SOIC | Discontinued | ROHS3 |
| SN74HCT244DWR | Texas Instruments | Buffer, Non-Inverting | 2 | 4 | 3-State | 6, 6 | 4.5V ~ 5.5V | -40 ~ 85 | 20-SOIC | Active | ROHS3 |
Engineering Selection Recommendations
Primary Recommendation: 74HCT244D,653 (Nexperia USA Inc.)
This part is the direct equivalent to the 74HCT244D,652, differing only in packaging format (Tape & Reel versus bulk). Both are Nexperia products with identical electrical specifications and ROHS3 compliance. The 74HCT244D,653 maintains active product status with 6782 units in stock, providing immediate availability and long-term supply continuity.
Secondary Recommendations:
-
CD74HCT244M96 (Texas Instruments): Active status with extended operating temperature range (-55°C to 125°C). ROHS3 compliant. Suitable for applications requiring wider temperature performance.
-
MC74HCT244ADWG or MC74HCT244ADWR2G (onsemi): Active status with extended operating temperature range (-55°C to 125°C). Both ROHS3 compliant. Available in tube and tape & reel packaging options.
-
SN74HCT244DWR (Texas Instruments): Active status with ROHS3 compliance. Maintains standard operating temperature range (-40°C to 85°C). Highest inventory availability at 6437 units.
Parts to Avoid for New Designs:
- CD74HCT244M: Discontinued at DiGi Electronics
- SN74HCT244DW: Discontinued at DiGi Electronics
- MM74HCT244WM and MM74HCT244WMX: Fairchild Semiconductor parts lack specified RoHS certification status and have reduced operating temperature range (-40°C to 85°C)
Frequently Asked Questions (FAQ)
Q: Can I use 74HCT244D,653 as a direct replacement for 74HCT244D,652?
A: Yes. Both parts are manufactured by Nexperia USA Inc. with identical electrical specifications, logic function, pin configuration, and package footprint. The only difference is packaging format (Tape & Reel versus bulk). No circuit modifications are required.
Q: What is the difference between the Nexperia and Texas Instruments versions?
A: All versions maintain the same logic function, pin configuration, and 20-SOIC package footprint. Texas Instruments versions (CD74HCT244M96, SN74HCT244DWR) offer extended operating temperature range (-55°C to 125°C) compared to the standard -40°C to 85°C. Electrical output current specifications remain identical at 6mA.
Q: Are the onsemi parts (MC74HCT244ADWG, MC74HCT244ADWR2G) compatible?
A: Yes. Both onsemi parts are functionally equivalent with identical logic specifications and package footprint. They feature extended operating temperature range (-55°C to 125°C) and ROHS3 compliance. The primary difference is packaging: ADWG is supplied in tube format, while ADWR2G is supplied in tape & reel format.
Q: Why do some parts show higher output current (7.2mA vs 6mA)?
A: The Fairchild Semiconductor parts (MM74HCT244WM, MM74HCT244WMX) specify 7.2mA output current compared to 6mA for other manufacturers. This represents a higher current capability and does not affect compatibility. These parts remain functionally interchangeable within the 74HCT244 logic family.
Q: What is the significance of the operating temperature range difference?
A: The main part and most substitutes operate from -40°C to 125°C. Some alternatives (CD74HCT244M96, MC74HCT244ADWG, MC74HCT244ADWR2G) extend the lower temperature limit to -55°C. For applications operating within -40°C to 85°C, all parts are equivalent. For applications requiring operation below -40°C, select parts with -55°C minimum rating.
Q: Are all listed parts ROHS3 compliant?
A: Most listed parts are ROHS3 compliant. The Fairchild Semiconductor parts (MM74HCT244WM, MM74HCT244WMX) do not specify RoHS certification status in the provided data. For applications requiring RoHS compliance documentation, select Nexperia, Texas Instruments, or onsemi versions.
Q: What packaging options are available?
A: All parts use the 20-SOIC surface mount package with 0.295" (7.50mm) width. Packaging formats differ: bulk, tube, tape & reel, or cut tape & Digi-Reel. The physical component and footprint remain identical across all packaging options.
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