Part A
74HC245D,653
NXP Hoa Kỳ Inc.
- Lifecycle
- Active
- Stock
- 8186 PCS
- Series
- Logic - Buffers, Drivers, Receivers, Transceivers
Replacement verdict
Not a drop-in replacement
The 74HC238D and 74HC245D,653 are not functionally interchangeable. The 74HC238D is a 3-to-8 line decoder/demultiplexer with active-low outputs, while the 74HC245D,653 is an octal bidirectional bus transceiver with 3-state outputs. Their logic functions, pin configurations, and I/O structures are fundamentally different, making direct substitution impossible without circuit redesign.
Different logic function
Different output type
Different pinout
Different I/O direction
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC245D,653 | 74HC238D |
|---|---|---|
| Series | 74HC | 74HC |
| Part Status | Discontinued at DigiKey | Active |
| Base Product Number | 74HC245 | - |
| Logic Type | Transceiver, Non-Inverting | - |
| Number of Elements | 1 | - |
| Number of Bits per Element | 8 | - |
| Output Type | 3-State | - |
| Current - Output High, Low | 7.8mA, 7.8mA | - |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tape & Reel (TR) | - |
| Type | - | Decoder/Demultiplexer |
| Circuit | - | 1 x 3:8 |
| Independent Circuits | - | 1 |
| Current - Output High Low | - | 5.2mA, 5.2mA |
| Voltage Supply Source | - | Single Supply |