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| Part Number | SN74121DR | SN74121D | 
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | 
| Product Status | Obsolete | Active | 
| Logic Type | Monostable | Monostable | 
| Independent Circuits | 2 | 2 | 
| Schmitt Trigger Input | No | No | 
| Propagation Delay | 45 ns | 45 ns | 
| Current - Output High, Low | 400µA, 16mA | 400µA, 16mA | 
| Voltage - Supply | 4.75 V ~ 5.25 V | 4.75 V ~ 5.25 V | 
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 
| Supplier Device Package | 14-SOIC | 14-SOIC |