Part A
74HC245D
東芝セミコンダクター・アンド・ストレージ
- Lifecycle
- Active
- Stock
- 4218 個数
- Package
- SOIC-14
- Series
- ロジック - バッファ、ドライバ、レシーバ、トランシーバ
Replacement verdict
Compatible functional replacement candidate
The 74HC244D and 74HC245D are both octal non-inverting buffers from the 74HC family, sharing identical supply voltage, logic levels, and package options. However, the 74HC244D provides unidirectional buffering with dual active-low output enables, while the 74HC245D is a bidirectional transceiver with direction control and a single active-low output enable. This fundamental difference in data flow architecture means the 74HC245D can serve as a functional substitute for the 74HC244D in unidirectional applications by fixing the direction pin, but the reverse substitution requires external logic to emulate bidirectional operation. Designers should verify direction control requirements and output enable polarity before committing to a drop-in replacement.
Logic Family
High match
Supply Voltage Range
High match
Output Enable Configuration
Validation required
Data Direction Architecture
Not compatible
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC245D | 74HC244D |
|---|---|---|
| Series | 74HC | 74HC |
| Part Status | Active | Active |
| 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 | 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 |