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| Part Number | DM74AS646WMX | DM74AS648WMX | DM74ALS646WMX | DM74AS640WMX | DM74AS646WM |
|---|---|---|---|---|---|
| Manufacturer | onsemi | Fairchild Semiconductor | Fairchild Semiconductor | onsemi | Fairchild Semiconductor |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Logic Type | Transceiver, Inverting | Transceiver, Inverting | Transceiver, Non-Inverting | Transceiver, Inverting | Transceiver, Inverting |
| Number of Elements | 1 | 1 | 1 | 1 | 1 |
| Number of Bits per Element | 8 | 8 | 8 | 8 | 8 |
| Input Type | - | - | - | - | - |
| Output Type | 3-State | 3-State | 3-State | 3-State | 3-State |
| Current - Output High, Low | 15mA, 48mA | 15mA, 48mA | 15mA, 24mA | 15mA, 64mA | 15mA, 48mA |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) | 24-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 24-SOP | 24-SOP | 24-SOP | 20-SOIC | 24-SOP |
