| PartNumber | SN74LS123NSR | SN74LS123NSRG4 | SN74LS123NS |
| Description | Monostable Multivibrator Dual retrig monostbl multivibrators | Monostable Multivibrator Dual retrig monostbl multivibrators | Monostable Multivibrator Dual Retriggerable Mono Multi |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Category | Monostable Multivibrator | Monostable Multivibrator | Monostable Multivibrator |
| RoHS | Y | Y | Y |
| Elements per Chip | 2 | 2 | 2 |
| Logic Family | LS | LS | HC |
| Logic Type | Monostable Multivibrator | Monostable Multivibrator | Monostable Multivibrator |
| Package / Case | SO-16 | SO-16 | SOP-16 |
| Supply Current Max | 12 mA | 12 mA | 0.008 mA |
| Propagation Delay Time | 56 ns | 56 ns | 250 ns, 50 ns, 43 ns |
| High Level Output Current | - 0.4 mA | - 0.4 mA | - 5.2 mA |
| Low Level Output Current | 8 mA | 8 mA | 5.2 mA |
| Supply Voltage Max | 5.25 V | 5.25 V | 6 V |
| Supply Voltage Min | 4.75 V | 4.75 V | 2 V |
| Minimum Operating Temperature | 0 C | 0 C | - 55 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 125 C |
| Packaging | Reel | Reel | Tube |
| Height | 1.95 mm | 1.95 mm | 1.58 mm |
| Length | 10.3 mm | 10.3 mm | 9.9 mm |
| Series | SN74LS123 | SN74LS123 | CD74HC4538 |
| Width | 5.3 mm | 5.3 mm | 3.91 mm |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Operating Supply Voltage | 5 V | 5 V | 2.5 V, 3.3 V, 5 V |
| Product Type | Monostable Multivibrator | Monostable Multivibrator | Monostable Multivibrator |
| Factory Pack Quantity | 2000 | 2000 | 40 |
| Subcategory | Logic ICs | Logic ICs | Logic ICs |
| Unit Weight | 0.007079 oz | 0.007079 oz | 0.004998 oz |