Part A
74HC244D
Toshiba Semiconductor and Storage
- Lifecycle
- Active
- Stock
- 7745 PCS
- Package
- SOIC-20
- Series
- Lógica - Buffers, Drivers, Receivers, Transceivers
Replacement verdict
Not a drop-in replacement
The 74HC244D and 74HC251D-Q100J serve fundamentally different logic functions—one is an octal non-inverting buffer with 3-state outputs, while the other is an 8-input multiplexer with 3-state outputs—so they are not functionally interchangeable despite sharing the 74HC logic family and SOIC-16 footprint. The 74HC251D-Q100J is also an automotive-qualified device, adding further differentiation. Designers must not treat these as substitutes.
Different logic function
Different input configuration
Different output behavior
Different qualification grade
Parts at a glance
Part B
74HC251D-Q100J
Nexperia USA Inc.
- Lifecycle
- Active
- Stock
- 6040 PCS
- Package
- SOIC-16
- Series
- Lógica - Conmutadores de sinais, Multiplexers, Decodificadores
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC244D | 74HC251D-Q100J |
|---|---|---|
| Supplier | - | Nexperia USA Inc. |
| Series | 74HC | Automotive, AEC-Q100, 74HC |
| Part Status | Active | Active |
| Type | - | Multiplexer |
| Circuit | - | 1 x 8:1 |
| Independent Circuits | - | 1 |
| Current - Output High Low | 7.8mA, 7.8mA | 5.2mA, 5.2mA |
| Voltage Supply Source | - | Single Supply |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Logic Type | Buffer, Non-Inverting | - |
| Number of Elements | 2 | - |
| Number of Bits per Element | 4 | - |
| Output Type | 3-State | - |