Alternatives to Texas Instruments SN74ALS574BDW
Texas Instruments SN74ALS574BDW and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 SN74ALS574BDWTexas Instruments |  SN74ACT574DWRTexas Instruments | SN74AHCT574DWRTexas Instruments | +1more | |
|---|---|---|---|---|
| FFF Compatibility | The part is supplied in the identical 20-SOIC (DW) package with a completely matching pinout, requiring zero layout modifications.The physical package dimensions, pitch, and surface-mount package style are identical to the SN74ALS574BDW.Operating voltage (4.5V to 5.5V), TTL-compatible input logic levels, and output drive capability (24mA) meet or exceed all specifications of the original ALS device. | Matches the 20-SOIC footprint and pinout configuration exactly.Same surface-mount outline and physical dimensions.While speed and power are vastly improved, the output sink current (I_OL) is limited to 8mA compared to the original's 24mA, which may impact heavy bus-loading applications. | ||
 AI Summary | SN74ALS574BDW by Texas Instruments: Flip Flop 1 Element D-Type 8 Bit Positive Edge 20-SOIC (0.295", 7.50mm Width). | This is the recommended high-performance alternative, providing full electrical compatibility including matching the original's 24mA output drive. It uses ACT logic with TTL-compatible inputs and operates on a 5V rail. This active part features significantly improved speed and power consumption compared to the obsolete ALS device.
| This active part uses AHCT CMOS technology to provide TTL-compatible inputs at 5V with extremely low power dissipation. It is a direct drop-in replacement physically, though it is limited to an 8mA output drive compared to the 24mA of the original. This is suitable for designs that do not heavily load the output bus lines.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Flip Flop 1 Element D-Type 8 Bit Positive Edge 20-SOIC (0.295", 7.50mm Width) | Flip Flop 1 Element D-Type 8 Bit Positive Edge 20-SOIC (0.295", 7.50mm Width) | Flip Flop 1 Element D-Type 8 Bit Positive Edge 20-SOIC (0.295", 7.50mm Width) | |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | |
| Type | Logic | Logic | Logic | |
| Datasheet | Open | Open | Open | |
| Lead Time | 6 weeks | 16 weeks | 9 weeks | |
| Country of Origin | MY | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0070 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Type | D-Type | - | - | |
| Function | Standard | - | - | |
| Output Type | Tri-State, Non-Inverted | - | - | |
| Trigger Type | Positive Edge | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) | - | - | |
| Clock Frequency | 35 MHz | - | - | |
| Voltage - Supply | 4.5V ~ 5.5V | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 SN74ALS245ADWTexas Instruments | In stock | Obsolete | 5Alternatives availableSee Alternatives |
 SN74HC574DWTexas Instruments | Non-stock | Obsolete | 3Alternatives availableSee Alternatives |
 SN74LS374Nonsemi | In stock | Obsolete | 5Alternatives availableSee Alternatives |
 SN74AHC541PWTexas Instruments | In stock | Obsolete | 4Alternatives availableSee Alternatives |
| SN74AHC573PWTexas Instruments | In stock | Obsolete | 4Alternatives availableSee Alternatives |
| SN74HCT541DWTexas Instruments | In stock | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Texas Instruments SN74ALS574BDW 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 Texas Instruments SN74ALS574BDW are the SN74ACT574DWR (Texas Instruments) and the SN74AHCT574DWR (Texas Instruments), out of 3 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 SN74ALS574BDW 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 SN74ALS574BDW (Texas Instruments) 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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