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| Part Number | DM74AS640N | DM74AS645N | DM74AS240N |
|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | onsemi | Fairchild Semiconductor |
| Product Status | Obsolete | Obsolete | Obsolete |
| Logic Type | Transceiver, Inverting | Transceiver, Non-Inverting | Buffer, Inverting |
| Number of Elements | 1 | 1 | 2 |
| Number of Bits per Element | 8 | 8 | 4 |
| Input Type | - | - | - |
| Output Type | 3-State | - | 3-State |
| Current - Output High, Low | 15mA, 64mA | - | 15mA, 64mA |
| Voltage - Supply | 4.5V ~ 5.5V | - | 4.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C (TA) | - | 0°C ~ 70°C (TA) |
| Mounting Type | Through Hole | Through Hole | Through Hole |
| Package / Case | 20-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) |
| Supplier Device Package | 20-PDIP | 20-PDIP | 20-PDIP |
