Alternatives to onsemi MM74HCT244WM
onsemi MM74HCT244WM and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 MM74HCT244WMonsemi |  SN74HCT244DWRTexas Instruments |  MC74HCT244ADWGonsemi | +3more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts share the exact same 20-SOIC Wide (7.50mm width) package with identical pin assignments and footprint, allowing a true drop-in replacement without PCB layout changes.The physical package dimensions and surface-mount style match the original Fairchild part.The logic levels, 3-state output, and operating supply voltage are fully compatible. However, the continuous output drive current is slightly lower (6.0 mA vs 7.2 mA in the original). | The SOIC-20 Wide package is physically identical and matches the original land pattern and pinout.Matching physical package style (SOIC-20, 7.50mm body width) and SMD mounting.The logic levels and supply voltage match. The temperature range is significantly improved, but the continuous output drive current is slightly lower (6.0 mA vs 7.2 mA). | ||
 AI Summary | MM74HCT244WM by onsemi: Buffer, Non-Inverting 2 Element 4 Bit per Element 3-State Output 20-SOIC. | This is a highly reliable direct second-source replacement from Texas Instruments. It matches the original SOIC-20 Wide footprint, enabling a direct drop-in replacement, though its maximum output drive current is slightly lower at 6.0 mA.
| An excellent active replacement from onsemi, the successor company to Fairchild. It offers an upgraded operating temperature range and is supplied in tubes, though it has a slightly lower output drive current rating of 6.0 mA.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | Unknown | REACH | REACH | |
| RoHS | Unknown | RoHS | RoHS | |
| Description | Buffer, Non-Inverting 2 Element 4 Bit per Element 3-State Output 20-SOIC | Buffer, Non-Inverting 2 Element 4 Bit per Element 3-State Output 20-SOIC | Buffer, Non-Inverting 2 Element 4 Bit per Element 3-State Output 20-SOIC | |
| Manufacturer | onsemi | Texas Instruments | onsemi | |
| Type | Logic | Logic | Logic | |
| Datasheet | Open | Open | Open | |
| Lead Time | 7 days | 16 weeks | 30 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0070 | - | - | |
| Moisture Sensitivity Level | - | - | - | |
| Logic Type | Buffer, Non-Inverting | - | - | |
| Output Type | 3-State | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) | - | - | |
| Voltage - Supply | 4.5V ~ 5.5V | - | - | |
| Number of Elements | 2 | - | - | |
| Operating Temperature | -40°C ~ 85°C (TA) | - | - | |
| Supplier Device Package | 20-SOIC | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 MM74HCT573WMonsemi | In stock | Obsolete | 5Alternatives availableSee Alternatives |
 MM74HC04Nonsemi | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
 MM74HC4051MXonsemi | Non-stock | Obsolete | 3Alternatives availableSee Alternatives |
 MM74HC688WMXonsemi | Discontinued | Obsolete | 3Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi MM74HCT244WM is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the onsemi MM74HCT244WM are the SN74HCT244DWR (Texas Instruments) and the MC74HCT244ADWG (onsemi), out of 5 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the MM74HCT244WM are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The MM74HCT244WM (onsemi) is a part in the Logic category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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