| Part Number | DM74AS21M | DM74AS20M | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | National Semiconductor | 
| Category | Logic - Gates and Inverters | Logic - Gates and Inverters | 
|   |   | |
| Product Status | Obsolete | Active | 
| Logic Type | AND Gate | - | 
| Number of Circuits | 2 | - | 
| Number of Inputs | 4 | - | 
| Features | - | - | 
| Voltage - Supply | 4.5V ~ 5.5V | - | 
| Current - Quiescent (Max) | - | - | 
| Current - Output High, Low | 2mA, 20mA | - | 
| Logic Level - Low | 0.8V | - | 
| Logic Level - High | 2V | - | 
| Max Propagation Delay @ V, Max CL | 6ns @ 5V, 50pF | - | 
| Operating Temperature | 0°C ~ 70°C | - | 
| Mounting Type | Surface Mount | - | 
| Supplier Device Package | 14-SOIC | - | 
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | - |