Part A
74HC245D,653
Компания NXP USA Inc.
- Lifecycle
- Active
- Stock
- 8186 ПКС
- Series
- Логика - буферы, драйверы, приемники, передатчики
Replacement verdict
Compatible functional replacement candidate
The 74HC244D and 74HC245D,653 are both octal non-inverting buffers from the 74HC family, sharing identical supply voltage, logic levels, and temperature ranges. However, the 74HC244D provides unidirectional buffering with dual active-low output enables, while the 74HC245D,653 offers bidirectional transceiver functionality with direction control and a single active-low output enable. This fundamental difference in data flow architecture means the 74HC245D,653 can serve as a functional replacement for the 74HC244D in unidirectional applications by tying the direction pin appropriately, but the reverse substitution requires careful validation of bidirectional requirements. Designers should verify pinout compatibility and control signal logic before committing to a drop-in replacement.
Function Type
Validation required
Supply Voltage
High match
Package Type
High match
Control Logic
Validation required
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC245D,653 | 74HC244D |
|---|---|---|
| Series | 74HC | 74HC |
| Part Status | Discontinued at DigiKey | Active |
| Base Product Number | 74HC245 | - |
| Logic Type | Transceiver, Non-Inverting | Buffer, Non-Inverting |
| Number of Elements | 1 | 2 |
| Number of Bits per Element | 8 | 4 |
| Output Type | 3-State | 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 ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tape & Reel (TR) | - |
| Current - Output High Low | - | 7.8mA, 7.8mA |