Part A
74HC238D
Toshiba Semiconductor và lưu trữ
- Lifecycle
- Active
- Stock
- 5394 PCS
- Package
- SOIC-16
- Series
- Logic - Signal Switches, Multiplexers, Decoders
Replacement verdict
Not a drop-in replacement
The 74HC244D and 74HC238D are not functionally interchangeable despite sharing the same 74HC logic family and SOIC-16 package. The 74HC244D is an octal non-inverting buffer/line driver with 3-state outputs, while the 74HC238D is a 3-to-8 line decoder/demultiplexer with active-high outputs. Their internal logic functions, pin assignments, and signal flow are fundamentally different, so substituting one for the other in an existing design is not feasible without redesigning the surrounding circuitry.
Different logic function
Different output type
Different pin assignment
Different channel count
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC238D | 74HC244D |
|---|---|---|
| Series | 74HC | 74HC |
| Part Status | Active | Active |
| Type | Decoder/Demultiplexer | - |
| Circuit | 1 x 3:8 | - |
| Independent Circuits | 1 | - |
| Current - Output High Low | 5.2mA, 5.2mA | 7.8mA, 7.8mA |
| Voltage Supply Source | Single Supply | - |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C (TA) |
| 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 |