Part A
74HC245D,653
NXP USA Inc.
- Lifecycle
- Active
- Stock
- 8186 PCS
- Series
- Logique - Buffers, lecteurs, récepteurs, émetteurs - récepteurs
Replacement verdict
Not a drop-in replacement
The 74HC259D and 74HC245D,653 are functionally unrelated logic ICs and cannot serve as substitutes for one another. The 74HC259D is an 8-bit addressable latch with decoder and storage registers, while the 74HC245D,653 is an octal bidirectional bus transceiver with 3-state outputs. Their internal architectures, pin functions, and intended applications differ fundamentally, making direct replacement impossible without complete circuit redesign.
Different logic function
Different output type
Different pin function
Different application role
Parts at a glance
Part B
74HC259D
Toshiba Semiconductor et stockage
- Lifecycle
- Active
- Stock
- 7207 PCS
- Package
- SOIC-20
- Series
- Logique - verrou
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC245D,653 | 74HC259D |
|---|---|---|
| Series | 74HC | 74HC |
| Part Status | Discontinued at DigiKey | Active |
| Base Product Number | 74HC245 | - |
| Logic Type | Transceiver, Non-Inverting | D-Type, Addressable |
| Number of Elements | 1 | - |
| Number of Bits per Element | 8 | - |
| Output Type | 3-State | Standard |
| 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) | - |
| Circuit | - | 1:8 |
| Independent Circuits | - | 1 |
| Delay Time - Propagation | - | 22ns |
| Current - Output High Low | - | 5.2mA, 5.2mA |