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| Part Number | DM74ALS521WM | DM74ALS521WMX | DM74ALS520WM |
|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | National Semiconductor |
| Product Status | Obsolete | Obsolete | Active |
| Type | Identity Comparator | Identity Comparator | Identity Comparator |
| Number of Bits | 8 | 8 | 8 |
| Output | Active Low | Active Low | Active Low |
| Output Function | A=B | A=B | A=B |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Current - Output High, Low | 2.6mA, 24mA | 2.6mA, 24mA | 2.6mA, 24mA |
| Max Propagation Delay @ V, Max CL | 20ns @ 5V, 50pF | 20ns @ 5V, 50pF | 22ns @ 5V, 50pF |
| Current - Quiescent (Iq) | - | - | 19 mA |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 20-SOIC | 20-SOIC | 20-SOIC |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
